WO1987007902A1 - Coatings based on polydextrose for aqueous film coating of pharmaceutical, food and confectionery products - Google Patents

Coatings based on polydextrose for aqueous film coating of pharmaceutical, food and confectionery products Download PDF

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Publication number
WO1987007902A1
WO1987007902A1 PCT/US1987/001506 US8701506W WO8707902A1 WO 1987007902 A1 WO1987007902 A1 WO 1987007902A1 US 8701506 W US8701506 W US 8701506W WO 8707902 A1 WO8707902 A1 WO 8707902A1
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WO
WIPO (PCT)
Prior art keywords
tablets
coating
coating suspension
film
polydextrose
Prior art date
Application number
PCT/US1987/001506
Other languages
French (fr)
Inventor
Edward J. Woznicki
Susan M. Grillo
Original Assignee
Colorcon, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Colorcon, Inc. filed Critical Colorcon, Inc.
Priority to KR1019880700163A priority Critical patent/KR960005621B1/en
Priority to JP62504219A priority patent/JPH07103047B2/en
Priority to DE3752244T priority patent/DE3752244T2/en
Priority to EP87904599A priority patent/EP0321464B1/en
Publication of WO1987007902A1 publication Critical patent/WO1987007902A1/en
Priority to DK084488A priority patent/DK84488A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/28—Dragees; Coated pills or tablets, e.g. with film or compression coating
    • A61K9/2806—Coating materials
    • A61K9/2833—Organic macromolecular compounds
    • A61K9/286—Polysaccharides, e.g. gums; Cyclodextrin
    • A61K9/2866—Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
    • A23G3/02—Apparatus specially adapted for manufacture or treatment of sweetmeats or confectionery; Accessories therefor
    • A23G3/20—Apparatus for coating or filling sweetmeats or confectionery
    • A23G3/2092—Apparatus for coating with atomised liquid, droplet bed, liquid spray
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
    • A23G3/34—Sweetmeats, confectionery or marzipan; Processes for the preparation thereof
    • A23G3/343—Products for covering, coating, finishing, decorating
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
    • A23P20/00—Coating of foodstuffs; Coatings therefor; Making laminated, multi-layered, stuffed or hollow foodstuffs
    • A23P20/10—Coating with edible coatings, e.g. with oils or fats
    • A23P20/105—Coating with compositions containing vegetable or microbial fermentation gums, e.g. cellulose or derivatives; Coating with edible polymers, e.g. polyvinyalcohol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/28—Dragees; Coated pills or tablets, e.g. with film or compression coating
    • A61K9/2806—Coating materials
    • A61K9/2833—Organic macromolecular compounds
    • A61K9/286—Polysaccharides, e.g. gums; Cyclodextrin
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G2200/00—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF containing organic compounds, e.g. synthetic flavouring agents
    • A23G2200/06—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF containing organic compounds, e.g. synthetic flavouring agents containing beet sugar or cane sugar if specifically mentioned or containing other carbohydrates, e.g. starches, gums, alcohol sugar, polysaccharides, dextrin or containing high or low amount of carbohydrate

Definitions

  • This invention is in the field of aqueous film coating of pharmaceutical, food and confectionery pro ⁇ ducts, and is more specifically concerned with providing such coatings based on polydextrose.
  • Cellulose polymers such as hydroxypropyl methyl- cellulose have long been recognized in the art as being suitable for the aqueous film coating of pharmaceutical tablets and the like.
  • Aqueous film coatings based on the polymer poly ⁇ dextrose provide the solution to both the pharmaceutical, and the food and confectionery problems described. Used alone, or in combination with otlier polymers, polydextrose produces pharmaceutical film coatings that exhibit ex ⁇ cellent adhesive qualities, while when used in food and confectionery applications, it can produce coatings with good organoleptic properties that are low calorie and non-cariogenic in nature.
  • polydextrose has an extremely low average molecular weight value (for example, peak molecular weight, Mp, is approximately 1230) . It is well known that low molecular weight polymers produce extremely weak films. ' Rowe (“Molecular Weight Studies on Kydroxypropyl Methyl- cellulose Phthalate” Acta-Pharm. Technologica 28 (2) , p.129 1982) has stated that for the purposes of film coating, there exists a CRITICAL MOLECULAR WEIGHT value for polymers such as hydroxypropyl methylcellulose
  • poly ⁇ dextrose would be considered to produce film coatings that are entirely unsuitable for modern film coating processes; yet we have found it can produce excellent film coatings that in some cases have superior properities to thoseobtained from more traditional polymers.
  • polydextrose can be formulated into a dry-edible film coating composition, shipped to the user and mixed easily into water to form an aqueous coating suspension.
  • the aqueous coating suspension comprises an effective amount of polydextrose, plasticizer, detackifier and a secondary film former, mixed into water to form an aqueous coating suspension which may be applied to the forms to be coated, as by spraying.
  • a colorant may be added to the aqueous coating suspension before the coating step.
  • a cellulosic polymer such as hydroxypropyl methylcellulose, may be substituted for the secondary film former, and the resulting formula is particularly adapted for coating waxy matrix tablets, which are particularly difficult to coat.
  • the film former of the coating is polydextrose, or a mixture of polydextrose and a cellulosic polymer film former. Also, it may be advantageous to coat with a layer of polydextrose aqueous coating suspension, and then overcoat with a layer of cellulosic film polymer coating suspension.
  • the cellulosic film polymer may be hydroxypropyl methylcellulose or hydroxypropyl cellulose.
  • the plasticizer may be polyethylene glycol, triacetin, propylene glycol, or acetyltriethyl citrate.
  • the colorants may be FD&C lakes, D&C lakes, titanium dioxide, or dyes approved for ingestion by the U.S. Federal Drug Administration. Examples of such pig ⁇ ments are listed in Colorcon U.S. Patent 4,543,370 issued September 24, 1985, and incorporated herein by reference.
  • the detackifier may be lecithin or mineral oil.
  • the secondary film former may be sodium alginate or propylene glycol alginate.
  • the polydextrose coating is especially effective in coating tablets and the like having debossed or in ⁇ taglio logos, trademarks, designs or words thereon since it adheres to the tablet surfaces without bridging and obscuring the debossed or intaglio printing.
  • a clear coating suspension is made for coating chocolates by mixing the following ingredients into water to form an aqueous coating solution.
  • Polydextrose is made by Pfizer, Inc.
  • Kelgin LV is sodium alginate made by the-Kelco division of Merck and is used as a secondary film former
  • Alcolec F-100 is water miscible lecithin made by the American Lecithin Co. and is used as a detackifier in the formula
  • triacetin is triethyl citrate by Pfizer and is used as a plasticizer
  • PEG 8000 is polyethylene glycol 8000 and is used in the formula as a plasticizer.
  • the mixing procedure is to mix 300 grams of the dry ingredie into about 1700 milliliters of water to make an aqueous coating.
  • the chocolates to be coated are placed in a 24 inch Accela Cota coating pan with 4 anti-skid bars, and the aqueous coating suspension is sprayed onto the choco ⁇ lates.
  • the inlet air is 45°C
  • the outlet air is 30°C
  • the atomizing air is 3 bar
  • the pan speed is 12 rpm
  • the feed rate is 18 grams/minute
  • the coating time is 90 minutes.
  • the procedure pro ⁇ quizd a very nice coating on the chocolates with no tack, and with no slimy taste.
  • Example 2 in order to coat vitamin tablets, a formula having the following ingredients is dry mixed together and then mixed into water to form an aqueous coating suspension which is sprayed onto the vitamin tablets: ⁇ Grams
  • the R-40 lake is FD&C Red number 40 aluminum lake made by Colorcon, Inc., West Point, Pennsylvania.
  • the mixing procedure is to blend all dry ingredi ⁇ ents into a blender for about 5 minutes, and add tri ⁇ acetin and blend for an additional 5 minutes. Then the formula is mixed into 4080 milliliters of distilled water to form an aqueous coating solution.
  • a 24 inch Accela Cota coating pan is loaded with 11 kilograms of vitamin tablets which have a debossed or intaglio logo on them.
  • the spray coating parameters are inlet air 85°C, outlet air 50°C, atomizing air 3 bar, pan speed 12 rpm, feed rate 60 grams/minute, and coating time 80.minutes.
  • the vitamin tablets receive a very nice coating with a good logo with no bridging, and no tack.
  • Y-5 HT lake 10.0 30.0 The Y-5 HT lake is FD&C Yellow number 5 aluminum lake made by Colorcon, Inc., West Point, Pennsylvania.
  • the solids of this aqueous coating suspension amount to 300 grams and the water amounts to 1700 grams, so the suspension is about 15% solids.
  • the inlet air is 66°C
  • the outlet air is 35°C
  • the atomizing air is 3 bar
  • the feed rate is 30 grams/ minute
  • the pan speed is 18 rpm
  • the coating time is 45 minutes.
  • Example 4 instead of coating the gumballs with a lake formula as in Example 3, it is desired to coat the gum ⁇ balls with a dye formula, and the following formula is mixed into water to form an aqueous coating suspension which is sprayed onto the gumballs. % Grams
  • the Y-5 dye is FD&C Yellow number 5 dye approved by the U.S. Federal Drug Administration for ingestion, the solids content amounts 300 grams, and the water content of the aqueous coating suspension is 1700 grams, the sus ⁇ pension being about 15% solids.
  • the air, feed rate, and pan speed parameters of the spraying are the same as in Example 3 except the coating time is 50 minutes.
  • the sodium alginate is a secondary film former that gives the resulting coating a glossy appearance.
  • the R-40 HT lake is FD&C Red number 40 aluminum lake
  • the Y-6 HT lake is FD&C Yellow number 6 aluminum lake, both made and sold by Colorcon, Inc., West Point, Pennsylvania.
  • the formula, 240 grams, is mixed into 960 imUliliters of water, and the resulting aqueous coating suspension is spray coated onto the almonds in a coating pan.
  • the almonds may have previously been given a subcoat of the clear polydextrose formula of Example 1, by spraying the Example 1 aqueous coating suspension onto the almonds with inlet air 73°C, outlet air 48°C, atomizing air
  • the almonds are placed in a coating pan and the cherry color aqueous coating suspension is sprayed onto the almonds as they are being rotated in the pan, with the inlet air being 73°C, the outlet air being 48°C, the atomizing air being 45 psi. the pan speed being 12 rpm, and the feed rate being 40 grams/minute, and the coating time being 30 minutes.
  • Example 6
  • KIX breakfast cereal with polydextrose
  • the following formula is mixed into an aqueous suspension which is sprayed onto the KIX cereal puffs in a fluidized bed coater, such as made by Aeromatic.
  • the procedure is to partly fill the bed coater cone with KIX cereal puffs, and turn on the coater to support the puffs in the air, and spray the puffs with the aqueous suspension.
  • the inlet temperature is 80°C
  • the outlet temperature is 38°C
  • the feed rate is 10 grams/minute
  • the air is 1 bar.
  • Polydextrose may be combined with a cellulosic polymer, such as Methocel E5, to obtain the superior adhesiveness of the polydextrose and the superior moisture barrier of the cellulosic polymer in coating vitamin tablets.
  • a cellulosic polymer such as Methocel E5
  • the Y-5 HT lake is FD&C Yellow number 5 lake made by Colorcon, Inc., West Point, Pennsylvania.
  • the formula contains 720 grams of solids and is mixed into 4080 milliliters of water to give a total weight of the aqueous coating suspension of 4800 grams.
  • Methocel E-5 is hydroxypropyl methyl cellulose made by Dow Chemical Co.
  • the aqueous coating suspension is sprayed onto tablets in a coating pan with inlet air at 85°C, outlet air at 50°C, atomizing air 3 bar, pan speed 12 rpm, feed rate 53 grams/minute, and coating time 90 minutes.
  • Another example of a formula particularly adapted for applying a coating to vitamin tablets with intaglio logos without bridges comprises a 75% to 25% ratio of polydextrose to Methocel E-5, instead of the 50% to 50% ratio shown in Example 7, and is listed below.
  • Another example of a formula containing a mixture of polydextrose and a cellulosic polymer for coating vitamin tablets is: to Grams
  • Another example of a formula containing both polydextrose and a cellulosic polymer is as follows.
  • Another formula containing a mixture of polydex ⁇ trose and hydroxypropyl methyl cellulose is as follows.
  • the B-l lake is FD&C Blue number 1 aluminum lake. This formula is especially advantageous if it is desired to coat waxy matrix tablets, such as Dimetaps by A. H. Robbins, which are very hard to coat because it is difficult to get anything to adhere to their waxy sur ⁇ face.
  • the outer surface of gumballs may be very rough with a large number of holes, and it may be desirable to apply a subcoat and fill in the holes before applying the thin coating of polydextrose as in Example 1, for example.
  • a suitable subcoat may be made from the follow ⁇ ing formula into an aqueous coating suspension and sprayed onto the gumballs.
  • ⁇ ⁇ ricrpcrystalline cellulose , , , ⁇ PEG 40CT is polyethylene glycol 400.
  • Example 13 Another formula for coating chocolates, an orange color, is as follows.
  • Vitamin tablets are spray coated in a coating pan with an aqueous coating suspension of Example 1 with the inlet air 85°C, outlet air 50°C, atomizing air 3 bar, pan speed 12 rpm, feed rate 60 grams/minute, and coating time 80 minutes.
  • the polydextrose coatings of the invention have the advantage of adhering to surfaces that are difficult to coat, such as the waxy matrix surfaces of some pharma ⁇ ceutical tablets, such as Dimetaps.
  • the coatings also have the further advantage of adhering to the debossed or intaglio surfaces of logos or words on tablets with ⁇ out obscuring those logos or words. This is very impor ⁇ tant when a manufacturer debosses his trademark, which may be a design or words, on his product.
  • coatings made of cellulosic polymer film formers would bridge the grooves formed by the debossed word or design on the tablet, and would obscure it so that it could not be read.
  • the polydextrose coating of the invention is particularly adapted to coat sugarless chewing gum pieces which are very difficult to coat in an aqueous system.
  • the coating suspension of Example 3 is particularly effective in coating sorbitol gum pieces.

Abstract

Providing a film coating on pharmaceutical tablets, foods, confectionary forms and the like by coating them with polydextrose, or a combination of polydextrose and cellulosic polymer, or a layer of polydextrose overcoated by a layer of cellulosic polymer.

Description

COATINGS BASED ON POLYDEXTROSE FOR AQUEOUS
FILM COATING OF PHARMACEUTICAL. FOOD AND
CONFECTIONERY PRODUCTS
TECHNICAL FIELD This invention is in the field of aqueous film coating of pharmaceutical, food and confectionery pro¬ ducts, and is more specifically concerned with providing such coatings based on polydextrose.
BACKGROUND OF THE INVENTION Cellulose polymers such as hydroxypropyl methyl- cellulose have long been recognized in the art as being suitable for the aqueous film coating of pharmaceutical tablets and the like.
While it is normally possible to produce excellent film coatings with such cellulosic materials, diffi¬ culties can sometimes arise with respect to the ability of the resultant film coatings to adhere satisfactorily to the surface to which they are applied. This is especially true when considering tablet substrates such as waxy matrix sustained release products and multi- vitamin products (with which the phenomenon of "bridging" of the coating across debossed legends can be a sub¬ stantial problem).
It is also desirable to be able to produce film coatings for food and confectionery products which are able to replace the currently used sugar coatings, in order to meet the requirements for low calorie, non- cariogenic (that is, not harmful to teeth) coatings for such products. While cellulosic polymers can meet these require¬ ments, they tend to produce coatings that have undesirable taste and -mouth-feel (that is, they are somewhat bitter and slimy in texture; both undesirable features especially for confectionery products) .
SUMMARY OF THE INVENTION Aqueous film coatings based on the polymer poly¬ dextrose provide the solution to both the pharmaceutical, and the food and confectionery problems described. Used alone, or in combination with otlier polymers, polydextrose produces pharmaceutical film coatings that exhibit ex¬ cellent adhesive qualities, while when used in food and confectionery applications, it can produce coatings with good organoleptic properties that are low calorie and non-cariogenic in nature.
One characteristic of polydextrose, however, is that it has an extremely low average molecular weight value (for example, peak molecular weight, Mp, is approximately 1230) . It is well known that low molecular weight polymers produce extremely weak films. ' Rowe ("Molecular Weight Studies on Kydroxypropyl Methyl- cellulose Phthalate" Acta-Pharm. Technologica 28 (2) , p.129 1982) has stated that for the purposes of film coating, there exists a CRITICAL MOLECULAR WEIGHT value for polymers such as hydroxypropyl methylcellulose
(H.P.M.C.), below which there is a great risk of the coating cracking. For H.P.M.C., he stated that the Mp value, which is indicative of the molecular weight of the main component, is approximately 8.0 x 10^. There is significantly greater than the Mp value for polydextrose, which would thus not be expected to produce satisfactory film coatings.
Additionally, Osterwald ("Properties of Film- Formers and Their Use in Aqueous Systems", Phar . Res., 1985, p.15) has stated that for film coating, polymers producing solutions (containing 2% w/w of the polymer in water) having viscosities in the range of 3-15 Pas (miHi Pascal seconds) (same as centipoise numerically) ought to be used, and that below this range, the polymer chains shorten to such an extent that the stability of the film is affected (i.e. film strength decreases too much) . Two percent aqueous solutions of polydextrose have a viscosity of less .than 2 mPas (in fact the value is too low to be differentiated from that of plain water) ,
Consequently, to those skilled in the art, poly¬ dextrose would be considered to produce film coatings that are entirely unsuitable for modern film coating processes; yet we have found it can produce excellent film coatings that in some cases have superior properities to thoseobtained from more traditional polymers.
Finally, polydextrose can be formulated into a dry-edible film coating composition, shipped to the user and mixed easily into water to form an aqueous coating suspension.
The aqueous coating suspension comprises an effective amount of polydextrose, plasticizer, detackifier and a secondary film former, mixed into water to form an aqueous coating suspension which may be applied to the forms to be coated, as by spraying. Optionally, a colorant may be added to the aqueous coating suspension before the coating step. Also, a cellulosic polymer, such as hydroxypropyl methylcellulose, may be substituted for the secondary film former, and the resulting formula is particularly adapted for coating waxy matrix tablets, which are particularly difficult to coat.
The film former of the coating is polydextrose, or a mixture of polydextrose and a cellulosic polymer film former. Also, it may be advantageous to coat with a layer of polydextrose aqueous coating suspension, and then overcoat with a layer of cellulosic film polymer coating suspension. The cellulosic film polymer may be hydroxypropyl methylcellulose or hydroxypropyl cellulose.
The plasticizer may be polyethylene glycol, triacetin, propylene glycol, or acetyltriethyl citrate. The colorants may be FD&C lakes, D&C lakes, titanium dioxide, or dyes approved for ingestion by the U.S. Federal Drug Administration. Examples of such pig¬ ments are listed in Colorcon U.S. Patent 4,543,370 issued September 24, 1985, and incorporated herein by reference.
The detackifier may be lecithin or mineral oil. The secondary film former may be sodium alginate or propylene glycol alginate.
The polydextrose coating is especially effective in coating tablets and the like having debossed or in¬ taglio logos, trademarks, designs or words thereon since it adheres to the tablet surfaces without bridging and obscuring the debossed or intaglio printing.
DETAILED DESCRIPTION We now turn to the examples of the invention, all of which disclose formulations which may be mixed into water to form an aqueous coating suspension that may be effective to coat pharmaceuticals, food, and confectioneries. This invention is concerned with coating pharma¬ ceutical, confectionery and food forms including medici¬ nal tablets, vitamin tablets, aspirin tablets, capsules, chewing gum balls, chocolates, pieces of candy, almonds, breakfast cereal, and the like. EXAMPLES
The following examples illustrate the invention. All units and percentages used herein are by weight. Example 1
A clear coating suspension is made for coating chocolates by mixing the following ingredients into water to form an aqueous coating solution.
% Grams
Polydextrose 81.42 2050 Soda Ash 0.72 18.2 Kelgin LV 4.96 125
Alcolec F-100 2.98 75 Triacetin 4.96 125
PEG 8000 4.96 125
Polydextrose is made by Pfizer, Inc., Kelgin LV is sodium alginate made by the-Kelco division of Merck and is used as a secondary film former, Alcolec F-100 is water miscible lecithin made by the American Lecithin Co. and is used as a detackifier in the formula, triacetin is triethyl citrate by Pfizer and is used as a plasticizer and PEG 8000 is polyethylene glycol 8000 and is used in the formula as a plasticizer.
The mixing procedure is to mix 300 grams of the dry ingredie into about 1700 milliliters of water to make an aqueous coating. The chocolates to be coated are placed in a 24 inch Accela Cota coating pan with 4 anti-skid bars, and the aqueous coating suspension is sprayed onto the choco¬ lates. During the coating procedure, the inlet air is 45°C, the outlet air is 30°C, the atomizing air is 3 bar, the pan speed is 12 rpm, the feed rate is 18 grams/minute, and the coating time is 90 minutes. The procedure pro¬ duced a very nice coating on the chocolates with no tack, and with no slimy taste. Example 2 in order to coat vitamin tablets, a formula having the following ingredients is dry mixed together and then mixed into water to form an aqueous coating suspension which is sprayed onto the vitamin tablets: Ά Grams
Polydextrose 68.38 492.3
Kelgin LV 4.18 30.1
Alcolec F- 100 2.51 18.1
Triacetin 2.09 15.0
PEG 8000 6.27 45.1
R-40 lake 12.50 90.0
Ti02 4.00 28.8 720.0
H20 4080.0
4800.0
The R-40 lake is FD&C Red number 40 aluminum lake made by Colorcon, Inc., West Point, Pennsylvania.
The mixing procedure is to blend all dry ingredi¬ ents into a blender for about 5 minutes, and add tri¬ acetin and blend for an additional 5 minutes. Then the formula is mixed into 4080 milliliters of distilled water to form an aqueous coating solution.
A 24 inch Accela Cota coating pan is loaded with 11 kilograms of vitamin tablets which have a debossed or intaglio logo on them. The spray coating parameters are inlet air 85°C, outlet air 50°C, atomizing air 3 bar, pan speed 12 rpm, feed rate 60 grams/minute, and coating time 80.minutes. The vitamin tablets receive a very nice coating with a good logo with no bridging, and no tack. Example 3
It is desired to color gumballs and for this purpose the following formula is dry mixed together and is mixed into water to make an aqueous coating suspen¬ sion which is sprayed onto the gumballs.
% Grams
Polydextrose 70.0 210.0 PEG 400 2.5 7.5
Sodium Alginate MV 5.0 15.0 Ά Grams
Ti02 10.0 30.0
Alcolec F-100 2.5 7.5
Y-5 HT lake 10.0 30.0 The Y-5 HT lake is FD&C Yellow number 5 aluminum lake made by Colorcon, Inc., West Point, Pennsylvania. The solids of this aqueous coating suspension amount to 300 grams and the water amounts to 1700 grams, so the suspension is about 15% solids. In spray coating the gumballs, the inlet air is 66°C, the outlet air is 35°C, the atomizing air is 3 bar, the feed rate is 30 grams/ minute, the pan speed is 18 rpm, and the coating time is 45 minutes. Example 4 Instead of coating the gumballs with a lake formula as in Example 3, it is desired to coat the gum¬ balls with a dye formula, and the following formula is mixed into water to form an aqueous coating suspension which is sprayed onto the gumballs. % Grams
Polydextrose 79.5 238.5
PEG 400 2.5 7.5
Sodium Alginate MV 5.0 15.0 τio2 10.0 30.0
Alcolec F-100 2.5 7.5
Y-5 Dye 0.5 1.5
The Y-5 dye is FD&C Yellow number 5 dye approved by the U.S. Federal Drug Administration for ingestion, the solids content amounts 300 grams, and the water content of the aqueous coating suspension is 1700 grams, the sus¬ pension being about 15% solids. The air, feed rate, and pan speed parameters of the spraying are the same as in Example 3 except the coating time is 50 minutes. Example 5
It is desired to coat almonds with a cherry color, and the following formula is mixed together and into an aqueous suspension and sprayed onto the almonds.
Ά Grams
Polydextrose 68.47 " 1711.75
Sodium Alginate (Kelgin LV) 4.18 104.50
Alcolec F-100 2.51 62.75
Triacetin 4.18 104.50
PEG 8000 4.18 104.50
R-40 HT lake 13.39 334.75
Y-6 HT lake 3.11 77.75
The sodium alginate is a secondary film former that gives the resulting coating a glossy appearance. The R-40 HT lake is FD&C Red number 40 aluminum lake, and the Y-6 HT lake is FD&C Yellow number 6 aluminum lake, both made and sold by Colorcon, Inc., West Point, Pennsylvania. The formula, 240 grams, is mixed into 960 imUliliters of water, and the resulting aqueous coating suspension is spray coated onto the almonds in a coating pan. The almonds may have previously been given a subcoat of the clear polydextrose formula of Example 1, by spraying the Example 1 aqueous coating suspension onto the almonds with inlet air 73°C, outlet air 48°C, atomizing air
45 psi, pan speed 12 rpm, feed rate 34 grams/minute, and coating time 35 minutes.
To apply the cherry color to the almonds, the almonds are placed in a coating pan and the cherry color aqueous coating suspension is sprayed onto the almonds as they are being rotated in the pan, with the inlet air being 73°C, the outlet air being 48°C, the atomizing air being 45 psi. the pan speed being 12 rpm, and the feed rate being 40 grams/minute, and the coating time being 30 minutes. Example 6
It is desired to coat KIX breakfast cereal with polydextrose, and the following formula is mixed into an aqueous suspension which is sprayed onto the KIX cereal puffs in a fluidized bed coater, such as made by Aeromatic.
1 Grams
Polydextrose 71.00 16.05
PEG 400 2.26 0.51
Kelgin LV 4.52 1.02
Alcolec F-100 2.26 0.51
Ti02 10.00 2.26
Y-5 HT lake 10.00 2.26 22.60
H20 277*5
The procedure is to partly fill the bed coater cone with KIX cereal puffs, and turn on the coater to support the puffs in the air, and spray the puffs with the aqueous suspension. The inlet temperature is 80°C, the outlet temperature is 38°C, the feed rate is 10 grams/minute, and the air is 1 bar. Example 7
Polydextrose may be combined with a cellulosic polymer, such as Methocel E5, to obtain the superior adhesiveness of the polydextrose and the superior moisture barrier of the cellulosic polymer in coating vitamin tablets. An example of a formula is as follows,
" 1 Grams
Polydextrose 34.24 246.5
Methocel E5 34.24 246.5
Kelgin LV 4.18 30.1
Alcolec F-100 2.51 18.1
Triacetin 2.09 15.0
PEG 8000 6.27 45.1
Y-5 HT lake 12.50 90.0
Ti0 4.00 28.8 The Y-5 HT lake is FD&C Yellow number 5 lake made by Colorcon, Inc., West Point, Pennsylvania. The formula contains 720 grams of solids and is mixed into 4080 milliliters of water to give a total weight of the aqueous coating suspension of 4800 grams. Methocel E-5 is hydroxypropyl methyl cellulose made by Dow Chemical Co. The aqueous coating suspension is sprayed onto tablets in a coating pan with inlet air at 85°C, outlet air at 50°C, atomizing air 3 bar, pan speed 12 rpm, feed rate 53 grams/minute, and coating time 90 minutes. Example 8
Another example of a formula particularly adapted for applying a coating to vitamin tablets with intaglio logos without bridges comprises a 75% to 25% ratio of polydextrose to Methocel E-5, instead of the 50% to 50% ratio shown in Example 7, and is listed below.
1 Grams
Polydextrose 51.36 369.8
Methocel E-5 . 17.12 123.3
Kelgin LV 4.18 30.1
Alcolec F-100 2.51 18.1
Triacetin 2.09 15.0
PEG 8000 6.27 45.1
Y-6 HT lake 12.50 90.0
Ti0£ 4.00 28.8
Example 9
Another example of a formula containing a mixture of polydextrose and a cellulosic polymer for coating vitamin tablets is: to Grams
Polydextrose 51.36 369.8
Klucel EF 17.12 123.3
Kelgin LV 4.18 30.1
Alcolec F-100 2.51 18.1
Triacetin 2.09 15.0 1 Grams
PEG 8000 6.27 45.1
Y-6 HT lake 12.50 90.0
Ti09 4.00 28.8 Klucel EF is hydroxypropyl cellulose by Hercules, Inc. Example 10
Another example of a formula containing both polydextrose and a cellulosic polymer is as follows.
Grams
Polydextrose 61.60 443.50
Klucel EF 6.80 48.96
Kelgin LV 4.18 30.10
Alcolec F-100 2.51 18.10
Triacetin 2.09 15.00
PEG 8000 6.26 45.10
R-40 HT lake 6.25 45.00
Y-6 HT lake 6.25 45.00
Ti02 4.06 29.23
Example 11
Another formula containing a mixture of polydex¬ trose and hydroxypropyl methyl cellulose is as follows.
Ά Grams
Polydextrose 36.86 921.5
Methocel E-5 36.86 921.5
Kelgin LV 4.50 112.5
Alcolec F-100 2.70 67.5
Triacetin 2.25 56.3
PEG 8000 6.75 168.8
Ti02 9.32 233.0
B-l lake 0.76 19.0
The B-l lake is FD&C Blue number 1 aluminum lake. This formula is especially advantageous if it is desired to coat waxy matrix tablets, such as Dimetaps by A. H. Robbins, which are very hard to coat because it is difficult to get anything to adhere to their waxy sur¬ face.
The formula ingredients are mixed into sufficient water to make a 15% solids suspension, and the suspen- sion is sprayed onto waxy matrix tablets at 45°C inlet air, 30°C outlet air, 3 bar atomizing air, 44 grams/ minute feed rate, and 12 rpm pan speed. Example 12
The outer surface of gumballs may be very rough with a large number of holes, and it may be desirable to apply a subcoat and fill in the holes before applying the thin coating of polydextrose as in Example 1, for example. A suitable subcoat may be made from the follow¬ ing formula into an aqueous coating suspension and sprayed onto the gumballs.
% Grams Polydextrose 52.2 208.8 PEG 400 1.8 7.2
Sodium Alginate 7.0 28.0 Titanium Dioxide 7.0 28.0
Alcolec F-100 2.1 8.4
Avicel 105 30.0 120.0
^πricrpcrystalline cellulose , , ,ΛΛ PEG 40CT is polyethylene glycol 400.
Example 13 Another formula for coating chocolates, an orange color, is as follows.
/o Grams
Polydextrose 68.81 206.4
Kelgin LV 4.18 12.5
Alcolec F-100 2.15 6.5
Triacetin 4.18 12.5
PEG 8000 4.18 12.5
Red 40 lake 13.39 40.2
Y-6 lake 3.11 9.3 Example 14
Vitamin tablets are spray coated in a coating pan with an aqueous coating suspension of Example 1 with the inlet air 85°C, outlet air 50°C, atomizing air 3 bar, pan speed 12 rpm, feed rate 60 grams/minute, and coating time 80 minutes.
Then the polydextrose coated vitamin tablets are spray coated with an OPADRY coating suspension made in accordance with the disclosure in Colorcon, Inc. U.S. Patent 4,543,370 which issued September 24, 1985, which is incorporated herein by reference.
ADVANTAGES The polydextrose coatings of the invention have the advantage of adhering to surfaces that are difficult to coat, such as the waxy matrix surfaces of some pharma¬ ceutical tablets, such as Dimetaps. The coatings also have the further advantage of adhering to the debossed or intaglio surfaces of logos or words on tablets with¬ out obscuring those logos or words. This is very impor¬ tant when a manufacturer debosses his trademark, which may be a design or words, on his product. Previously, coatings made of cellulosic polymer film formers would bridge the grooves formed by the debossed word or design on the tablet, and would obscure it so that it could not be read.
In addition to coating waxy matrix tablets, the polydextrose coating of the invention is particularly adapted to coat sugarless chewing gum pieces which are very difficult to coat in an aqueous system. The coating suspension of Example 3 is particularly effective in coating sorbitol gum pieces.

Claims

1. A method of coating pharmaceutical tablets, food, confectionery forms and the like with a protective film comprising the steps of mixing polydextrose, plasticizer, detackifier, and secondary film former into water to form an aqueous coating suspension, spraying an effective amount of said coating suspension onto said tablets to form a film coating on said tablets, and drying the film coating on said tablets.
2. The method of claim 1, including dispersing a colorant in the coating suspension before applying the coating suspension to the tablets.
3. The method of claim 1, wherein the plasticizer is polyethylene glycol, triacetin, propylene glycol, or acetyltriethyl citrate.
4. The method of claim 1, wherein the plasticizer is in a range of 2.5%. to 10% by weight of the non-water ingredients of the aqueous coating suspension.
5. The method of claim 1, wherein the detackifier is lecithin or mineral oil.
6. The method of claim 1. wherein the detackifier is in the range of 1% to 3% by weight of the non-water ingredients of the aqueous coating suspension.
7. The method of claim 1, wherein the secondary film former is sodium alginate or propylene glycol alginate.
8. The method of claim 1, wherein the secondary film former is in the range of 2% to 10% by weight of the non-water ingredients of the aqueous coating suspension.
- 15 - 9. The method of claim 2, wherein said colorants are FD&C lakes, D&C lakes, titanium dioxide, or FD&C or D&C dyes.
10. The method of claim 2, wherein said colorants are in the range of 0% to 25% by weight of the non-water ingredients of the aqueous coating suspension.
11. The method of claim 1 the plasticizer being polyethylene glycol, triacetin, propylene glycol, or acetyltriethyl citrate, the detackifier is lecithin or mineral oil, the secondary film former is sodium alginate or propylene glycol alginate, and the colorants are FD&C lakes, D&C lakes, titanium dioxide, or FD&C or D&C dyes.
12. The method of claim 1, the polydextrose being 30 to 90% by weight of the non-water ingredients of the aqueous coating suspension, the colorants being FD&C lakes, D&C lakes, titanium dioxide, or FD&C or D&C dyes, and are 0 to 25% by weight of the non-water ingredients of the suspension, the plasticizer is polyethylene glycol, triacetin, propylene glycol. or acetyltriethyl citrate in a range of 2.5% to 10% by weight of the non-water ingredients of the suspension, the detackifier is lecithin or mineral oil in a range of 1 to 3% by weight of the non-water ingredients of the aqueous coating suspension, and the secondary film former is sodium alginate or propylene glycol alginate in a range of 2% to 10% by weight of the non-water ingredients of the aqueous coating suspension.
13. A method of coating pharmaceutical tablets, food, confectionery forms and the like with a protective film comprising the steps of mixing polydextrose, plasticizer, detackifier, and secondary film former into water to form an aqueous coating suspension, said tablets having debossed words or designs on their outer surface, spraying an effective amount of said coating suspension onto said tablets to form a film coating thereon without obscuring the debossed words or designs by bridging, and drying the film coating on said tablets.
14. A method of coating pharmaceutical tablets, food, confectionery forms and the like with a protective film comprising the steps of mixing polydextrose, plasticizer, and a cellulosic polymer into water to make an aqueous coating suspension, spraying an effective amount of said coating suspension onto said tablets to form a film coating on said tablets, and drying the film coating on said tablets.
15. The method of claim 14, the cellulosic polymer being hydroxypropyl methyl cellulose or hydroxypropyl cellulose.
16. The method of claim 14, including mixing a detackifier into said aqueous coating suspension.
17. The method of claim 14, including dispersing a colorant in the coating suspension before applying the coating suspension onto the tablets.
18. The method of claim 14, wherein the plasticizer is polyethylene glycol, triacetin, propylene glycol, or acetyltriethyl citrate, or a mixture thereof.
19. The method of claim 15, wherein the plasticizer is in a range of 2.5% to 10% by weight of the aqueous coating suspension without the water.
20. The method of claim 16, including a detackifier of lecithin or mineral oil.
21. The method of claim 18,'wherein the detackifier is in the range of 1% to 3% by weight of the non-water ingredients of the aqueous coating suspension.
22. The method of claim 16, wherein said colorants are FD&C lakes, D&C lakes, titanium dioxide, or FD&C or D&C dyes.
23. The method of claim 16, wherein said colorants are in the range of 0%, to 26% by weight of the non-water ingredients of the aqueous coating suspension-
24. A method of coating pharmaceutical tablets, food, confectionery forms and the like with a protective film comprising the steps of mixing together polydextrose, plasticizer, detackifier, secondary film former, and water to form an aqueous coating suspension, spraying an effective amount of said coating suspension onto said tablets to form a film coating on said tablets, and drying the film coating on said tablets, spraying an effective amount of a cellulosic coating solution onto the tablets to form a cellulosic film coating on the tablets, and drying the cellulosic film coating on said tablets.
25. The method of claim 24, including dispersing colorant in the cellulosic coating solution before spraying it onto said tablets.
26. The product made in accordance with the method of claim 1.
27. The product made in accordance with the method of claim 11,
28. The product made in accordance with the method of claim 12.
29. The product made in accordance with the method of claim 13.
30. The product made in accordance with the method of claim 14.
31. The product made in accordance with the method of claim 24.
PCT/US1987/001506 1986-06-19 1987-06-19 Coatings based on polydextrose for aqueous film coating of pharmaceutical, food and confectionery products WO1987007902A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019880700163A KR960005621B1 (en) 1986-06-19 1987-06-19 Coating based on poly dextrose for aqueous film coating of pharmaceutical, food and confectionery products
JP62504219A JPH07103047B2 (en) 1986-06-19 1987-06-19 Polydextrose-based coating for aqueous film coating of pharmaceutical, food and confectionery products
DE3752244T DE3752244T2 (en) 1986-06-19 1987-06-19 POLYDEXTROSE-BASED COATINGS FOR WATER FILM COATINGS ON MEDICINAL PRODUCTS FOOD AND CONFECTIONERY
EP87904599A EP0321464B1 (en) 1986-06-19 1987-06-19 Coatings based on polydextrose for aqueous film coating of pharmaceutical, food and confectionery products
DK084488A DK84488A (en) 1986-06-19 1988-02-18 COATING METHOD

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US876,186 1986-06-19
US06/876,186 US4802924A (en) 1986-06-19 1986-06-19 Coatings based on polydextrose for aqueous film coating of pharmaceutical food and confectionary products

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EP (1) EP0321464B1 (en)
JP (1) JPH07103047B2 (en)
KR (1) KR960005621B1 (en)
AU (1) AU601341B2 (en)
DE (1) DE3752244T2 (en)
DK (1) DK84488A (en)
PH (1) PH24111A (en)
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WO1991015548A1 (en) * 1990-04-04 1991-10-17 Berwind Pharmaceutical Services, Inc. Aqueous maltodextrin and cellulosic polymer film coatings
US5171589A (en) * 1991-05-31 1992-12-15 Wm. Wrigley Jr. Company Coated chewing gun products polished with colored wax and method of preparation
EP0664672A1 (en) * 1991-12-20 1995-08-02 Wm. Wrigley Jr. Company Chewing gum products using polydextrose
EP0664672A4 (en) * 1991-12-20 1997-02-05 Wrigley W M Jun Co Chewing gum products using polydextrose.
WO1993019615A1 (en) * 1992-04-03 1993-10-14 Bsn Use of a protective film on foods with a chocolate coating or the like, film-forming composition for producing said film, and method therefor
FR2689376A1 (en) * 1992-04-03 1993-10-08 Bsn Use of a protective film for a food product comprising a coating of chocolate or the like, a film-forming composition for obtaining such a film and a process for its implementation.
US5409715A (en) * 1992-04-21 1995-04-25 Wm. Wrigley Jr. Company Use of edible film to prolong chewing gum shelf life
US5433960A (en) * 1992-04-21 1995-07-18 Wm. Wrigley Jr. Company Chewing gum including agent containing edible film
US5286502A (en) * 1992-04-21 1994-02-15 Wm. Wrigley Jr. Company Use of edible film to prolong chewing gum shelf life
US5436011A (en) * 1993-04-16 1995-07-25 Bristol-Myers Squibb Company Solid pharmaceutical dosage form and a method for reducing abrasion
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DE3752244T2 (en) 1999-08-19
DK84488A (en) 1988-04-19
JPS63503515A (en) 1988-12-22
KR880701264A (en) 1988-07-26
AU601341B2 (en) 1990-09-06
ZA874457B (en) 1987-12-22
EP0321464A4 (en) 1989-06-26
DE3752244D1 (en) 1999-02-04
EP0321464A1 (en) 1989-06-28
EP0321464B1 (en) 1998-12-23
JPH07103047B2 (en) 1995-11-08
AU7691887A (en) 1988-01-12
US4802924A (en) 1989-02-07
DK84488D0 (en) 1988-02-18
KR960005621B1 (en) 1996-04-30
PH24111A (en) 1990-03-05

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