CN102433059B - Metal protective layer composition and preparation method and use thereof - Google Patents
Metal protective layer composition and preparation method and use thereof Download PDFInfo
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Abstract
The invention provides a metal protective layer composition and a preparation method and use thereof. The composition, based on the total weight, comprises the following components: (1) 10 to 30 weight percent of polyester, wherein the polyester is a branched hydroxyl polyester of which the hydroxyl value is more than 120; (2) 5 to 25 weight percent of nitrocellulose resin, wherein the nitrocellulose resin is low-nitrogen nitrocellulose resin of which the nitrogen content is less than 12.4; (3) 5 to 30 weight percent of coupling agent which is aliphatic isocyanate; (4) 5 to 25 weight percent of pigment; and (5) 10 to 60 weight percent of organic solvent. The metal protective layer composition provided by the invention has high adhesion force with a metal layer, can effectively prevent the corrosion of an etching solution to the metal layer, and has high re-coating performance and film-forming property.
Description
Technical field
The present invention relates to a kind of coat of metal composition and method of making the same and application.
Background technology
Along with expanding economy, people's material life is greatly improved.But, when people when enjoying life to the full, also puzzled by a large amount of counterfeit and shoddy goods.In order to protect consumers in general's rights and interests, various false proof modes and anti-fake product arise at the historic moment.
At present, high-end product is generally all used anti-counterfeiting line, anti-counterfeiting label or false proof the purpose that reaches the identification counterfeit and shoddy goods that has the optical anti-counterfeiting element.But since anti-counterfeiting line, anti-counterfeiting label or false proof itself is less, structure is comparatively simple, be easy to copy, therefore, how allowing these public anti-counterfeiting line easy to identify, anti-counterfeiting label or false proof itself can be difficult to forge but is the unusual worried problem that false proof staff faces.Go metal fretwork technology anti-counterfeiting technology anti-counterfeiting technology comparatively complicated as concentrated multiple technologies, processing and the high performance anti-fake material of need use to rise just gradually.
Summary of the invention
The purpose of this invention is to provide a kind of and metal level binding property good, can effectively prevent corrosive fluid to the corrosion of metal level, and have coat of metal composition and method of making the same and the application of above-mentioned composition in going metal hollow out anti-counterfeiting technology of good recoatability and film-forming properties.
The invention provides a kind of metal protection layer composition, wherein, is benchmark with the gross weight of described composition, and described composition contains following component:
(1) polyester of 10-30 weight %, described polyester are hydroxyl value greater than 120 collateralization hydroxyl polyester;
(2) Nitrocellulose of 5-25 weight %, described Nitrocellulose are the low nitrogen Nitrocellulose of nitrogen content＜12.4 weight %;
(3) linking agent of 5-30 weight %, described linking agent are aliphatic isocyanates;
(4) pigment of 5-25 weight %; And
(5) organic solvent of 10-60 weight %.
Described polyester, Nitrocellulose, pigment, linking agent and organic solvent can play synergy, make the composition that contains said components can stick on the metal level preferably, effectively prevent corrosive fluid to the corrosion of metal level, and have good recoatability and film-forming properties; Wherein, described recoatability refers to that the film that forms at described metal protection layer composition is coated with the ability of other coatings.The present inventor finds; when the hydroxyl value of the polyester in the described metal protection layer composition greater than 120 and the nitrogen content of Nitrocellulose when being lower than 12.4 weight %; not only can give higher hardness and the film-forming properties of described composition, can guarantee that also described Nitrocellulose and polyester can be dissolved in the described organic solvent well.In addition; when described organic solvent is the mixed solvent of fatty acid ester series solvent and ketone series solvent; can make described polyester, Nitrocellulose, pigment and linking agent mix more evenly; thereby improve adhesivity and the film-forming properties of described metal protection layer composition, the over-all properties of the metal protection layer composition that obtains is more excellent.
The present invention also provides a kind of coat of metal preparation of compositions method, this method comprises polyester, Nitrocellulose, linking agent, pigment and organic solvent mix, make described polyester, Nitrocellulose, linking agent and pigment are dispersed in the described organic solvent, wherein, gross weight with described composition is benchmark, the content of described polyester is 10-30 weight %, the content of described Nitrocellulose is 5-25 weight %, the content of described linking agent is 5-30 weight %, the content of described pigment is 5-25 weight %, and the content of described organic solvent is 10-60 weight %; And described polyester is hydroxyl value greater than 120 collateralization hydroxyl polyester, and described Nitrocellulose is the low nitrogen Nitrocellulose of nitrogen content＜12.4 weight %, and described linking agent is aliphatic isocyanates.
In addition, the present invention also provides the application of above-mentioned metal protection layer composition in going metal hollow out anti-counterfeiting technology.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
According to metal protection layer composition of the present invention, wherein, be benchmark with the gross weight of described composition, described composition contains following component:
(1) polyester of 10-30 weight %, described polyester are hydroxyl value greater than 120 collateralization hydroxyl polyester;
(2) Nitrocellulose of 5-25 weight %, described Nitrocellulose are the low nitrogen Nitrocellulose of nitrogen content＜12.4 weight %;
(3) linking agent of 5-30 weight %, described linking agent are aliphatic isocyanates;
(4) pigment of 5-25 weight %; And
(5) organic solvent of 10-60 weight %.
According to the present invention; as long as although contain the polyester of said components and content; Nitrocellulose; linking agent; the metal protection layer composition of pigment and organic solvent just has good anti-corrosion; recoatability and film-forming properties; and it is good with the binding property of metal level; but can mate better in order to make above-mentioned performance; under the preferable case; gross weight with described composition is benchmark; the content of described polyester is 10-25 weight %; the content of described Nitrocellulose is 10-20 weight %; the content of described linking agent is 5-20 weight %; the content of described pigment is 5-20 weight %, and the content of described organic solvent is 25-60 weight %.
According to the present invention, described polyester refers to the polymkeric substance that formed by dibasic alcohol or polyvalent alcohol and diprotic acid or polyprotonic acid polycondensation, described polyester can be commercially available, also can prepare according to the method for well known to a person skilled in the art, as long as to satisfy described polyester be hydroxyl value greater than 120 collateralization hydroxyl polyester.Described dibasic alcohol for example can be selected from ethylene glycol, 1, ammediol, 1,4-butyleneglycol, 1, one or more in 5-hexylene glycol and the neopentyl glycol; Described polyvalent alcohol for example can be selected from one or more in TriMethylolPropane(TMP), tetramethylolmethane, glycerine, Xylitol and the sorbyl alcohol; Described diprotic acid for example can be selected from one or more in oxalic acid, hexanodioic acid, Succinic Acid, m-phthalic acid and the terephthalic acid; Described polyprotonic acid for example can be trimellitic acid and/or pyromellitic acid.The condition of described dibasic alcohol or polyvalent alcohol and diprotic acid or polyprotonic acid polycondensation is conventionally known to one of skill in the art, gives unnecessary details no longer one by one at this.
According to the present invention, described polyester is the film-forming components of metal protection layer composition as the matrix resin of described metal protection layer composition and add, and plays crucial effects.Hydroxyl value by controlling described polyester is greater than 120; under condition of cure; just can make described polyester and the linking agent generation cross-linked network structure that reacts, thereby make described metal protection layer composition and metal have preferably binding property, effectively prevent that corrosive fluid is to the corrosion of metal level.Under the preferable case, when the hydroxyl value of described polyester is greater than 120 to 150 the time, the adhesivity of described metal protection layer composition and the consistency of each material are more excellent.Need to prove that described hydroxyl value refers to the milligram number of the suitable potassium hydroxide (KOH) of amount of hydroxyl groups in the 1g polyester sample, represents with mgKOH/g.
According to the present invention; although the number-average molecular weight of described polyester can not cause influence significantly to the performance of described metal protection layer composition; but; for viscosity and the dispersiveness of other components in described polyester of taking into account system; under the preferable case; the number-average molecular weight of described polyester is 200-2000, more preferably 300-1000.
As a rule, each glucose molecule contains three free hydroxyls, after handling with concentrated nitric acid, can be converted into Nitrocellulose.Described Nitrocellulose is little yellow, and outward appearance is as fiber, and its character and purposes depend primarily on nitrated degree, i.e. nitrogen content.According to the difference of nitrogen content, industrial Nitrocellulose be divided into No. 1 strong cotton (nitrogen content 〉=13.13 weight %), No. 2 strong cotton (nitrogen content is 11.9-12.4 weight %), cotton (nitrogen content is 11.8-12.1 weight %), quick-fried collodion (nitrogen content is 11.94-12.3 weight %) a little less than No. 3, pyroxylin (nitrogen content is 12.5-12.7 weight %), varnish is with cotton (nitrogen content is 11.6-12.2 weight %), zylonite cotton (nitrogen content is 10.8-11.2 weight %) etc.For the ease of understanding, there is document to claim collodion the NC of nitrogen content≤12.4 weight % again, the title guncotton of nitrogen content＞12.4 weight %.Described low nitrogen Nitrocellulose is called low nitration Mierocrystalline cellulose again, refers to that nitrogen content is less than the Nitrocellulose of 12.4 weight %.
According to the present invention; the nitrogen content of described Nitrocellulose can guarantee that less than 12.4 weight % the metal protection layer composition that obtains can have higher hardness and solvability concurrently as long as satisfy; under the preferable case; when the nitrogen content of described Nitrocellulose was 10-12 weight %, the over-all properties of the metal protection layer composition that obtains was more excellent.
The present invention is to the not restriction especially of viscosity of described Nitrocellulose, as long as can make described Nitrocellulose be dissolved in the system preferably, for example, adopt falling ball method to measure the viscosity of described Nitrocellulose, the falling sphere time under 25 ℃ was preferably 1/20 second-1/16 second for being not more than 1/16 second.
According to the present invention, under condition of cure, in the described linking agent aliphatic isocyanates not by amination-NCO can with polyester in hydroxyl react, therefore, described not by amination-content of NCO can reasonably select according to the hydroxyl value of described polyester.Under the preferable case, in the described aliphatic isocyanates not by amination-content of NCO is 10-25 weight %.Need to prove that described " aliphatics " refers to mainly to be made of straight chain, side chain or ring-type, saturated or undersaturated hydrocarbon carbon atom and hydrogen atom; That is can be that carbonatoms is straight chain aliphatic hydrocarbon, chain aliphatic hydrocarbon and the alicyclic hydrocarbon of 3-8.
The present invention can be existing various aliphatic isocyanates to the not restriction especially of kind of described aliphatic isocyanates.Under the preferable case, described aliphatic isocyanates is selected from hexamethylene diisocyanate, isophorone diisocyanate, tetramethylxylylene diisocyanate, methylene-bis (4-cyclohexyl isocyanate), with in bornylane vulcabond and the tolylene diisocyanate one or more; More preferably, described isocyanic ester is hexamethylene diisocyanate and/or isophorone diisocyanate.
The present invention is to the not restriction especially of number-average molecular weight of described aliphatic isocyanates; but for the dispersiveness of the adhesivity that makes the metal protection layer composition that obtains and each component more excellent; under the preferable case, the number-average molecular weight of described aliphatic isocyanates is 100-800.
According to the present invention; the purpose that adds pigment in the described composition is in order to improve described metal protection layer composition for the preparation of the online differentiability of going in the metal hollow out anti-false sign; namely printing in the process of various fine patterns with metal protection layer composition provided by the invention, can be by naked eyes intuitive judgment printing situation.Described pigment can be selected from and existingly variously can make described metal protection layer composition have the pigment of color; for example; described pigment can be selected from one or more in titanium dioxide, ferric oxide, silicon-dioxide, kaolin, talcum and the phthalocyanine blue, perhaps can also be for containing one or more the material in titanium dioxide, ferric oxide, silicon-dioxide, kaolin, talcum and the phthalocyanine blue.Under the preferable case, described pigment is titanium dioxide or the material that contains titanium dioxide, for example, can be titanium dioxide, chalk etc.
According to the present invention, described organic solvent can be selected from the existing various organic solvent that can dissolve described polyester, Nitrocellulose and linking agent, for example, described organic solvent can be in fatty acid ester series solvent, ketone series solvent and the benzene series solvent one or more.Described fatty acid ester series solvent for example can be selected from one or more in methyl acetate, ethyl acetate, propyl acetate and the butylacetate; Described ketone series solvent for example can be selected from one or more in acetone, butanone, methylethylketone, pimelinketone, espeleton, mibk, methylpentanone and the pimelinketone; Described benzene series solvent for example can be selected from one or more in benzene, toluene and the dimethylbenzene.The present inventor finds; when described organic solvent is the mixed solvent of fatty acid ester series solvent and ketone series solvent; described polyester, linking agent and Nitrocellulose are dissolved each other together well, thereby improve adhesivity and the film-forming properties of described metal protection layer composition.The part by weight of described fatty acid ester series solvent and ketone series solvent is as being 1: 0.5-2.5; Be preferably 1: 0.6-2.
According to the present invention, can also contain auxiliary agent in the described metal protection layer composition.The kind of described auxiliary agent and consumption can add according to actual needs, not restriction especially.Described auxiliary agent specifically can be selected from one or more in siccative, flow agent, antioxidant and the defoamer; Gross weight with described metal protection layer composition is benchmark, and the content of described auxiliary agent can be 0.1-5 weight %.Wherein, described siccative for example can be the metallic soap of naphthenic acid or isocaprylic acid (2 ethyl hexanoic acid); metal commonly used can be selected from one or more among Co, Mn, Ce, V, Fe, Li, K, Ca, Sr, Ba, Al, Sn, Pb, Bi, Ti, Cr, Ni, Cu, Zn, Zr, Mo and the Nd in the metallic soap; gross weight with described metal protection layer composition is benchmark; the content of described siccative can be 0-5 weight %, is preferably 0.1-1 weight %.The kind of described flow agent and consumption are conventionally known to one of skill in the art, and for example described flow agent can be selected among EFKA3883, EFKA3886, EFKA3600, BYK366, BYK333, BYK307 and the DEGO410 one or more; Wherein EFKA series is Dutch Ai Fuka company product, and BYK series is BYK company product, and DEGO series is German Di Gao company product, more than its trade mark be conventionally known to one of skill in the art; Gross weight with described metal protection layer composition is benchmark, and the content of described flow agent can be 0-1.5 weight %, is preferably 0.1-1 weight %.The kind of described antioxidant and consumption are conventionally known to one of skill in the art, for example, described antioxidant can be selected from 2,6-ditertbutylparacresol, 2,4-ditertbutylparacresol, butylated hydroxy anisole and 1, in two (3, the 5-di-t-butyl-4-hydroxyl-phenylpropionic acid) hydrazines of 2-one or more; Gross weight with described metal protection layer composition is benchmark, and the content of described flow agent can be 0-1.5 weight %, is preferably 0.1-1 weight %.The kind of described defoamer and consumption are conventionally known to one of skill in the art, and for example, described defoamer can be selected among EFKA2022, EFKA2527, EFKA2040, BYK352, BYK354 and the BYK357 one or more; Gross weight with described metal protection layer composition is benchmark, and the content of described defoamer is 0-2 weight %, is preferably 0.1-1.5 weight %.
According to coat of metal preparation of compositions method provided by the invention, the mixing of described polyester, Nitrocellulose, linking agent, pigment and organic solvent can be carried out also simultaneously can proceed step by step, under the preferable case, the method that polyester, Nitrocellulose, linking agent, pigment and organic solvent are mixed is for mixing described Nitrocellulose, polyester, linking agent and pigment successively with organic solvent, namely earlier Nitrocellulose is mixed with organic solvent, stirring is fully dissolved described Nitrocellulose, obtains containing the solution of Nitrocellulose; Polyester is mixed with the above-mentioned solution that contains Nitrocellulose, after stirring, add linking agent successively again and pigment mixes.
In method provided by the invention, the consumption of each material should make in the metal protection layer composition that obtains, gross weight with described composition is benchmark, the content of described polyester is 10-30 weight %, the content of described Nitrocellulose is 5-25 weight %, the content of described linking agent is 5-30 weight %, and the content of described pigment is 5-25 weight %, and the content of described organic solvent is 10-60 weight %; Under the preferable case; the consumption of each material should make in the metal protection layer composition that obtains; gross weight with described composition is benchmark; the content of described polyester is 10-25 weight %; the content of described Nitrocellulose is 10-20 weight %; the content of described linking agent is 5-20 weight %, and the content of described pigment is 5-20 weight %, and the content of described organic solvent is 25-60 weight %.
The kind of described polyester, Nitrocellulose, linking agent, pigment and organic solvent is selected as indicated above, does not repeat them here.
In addition, the present invention also provides the application of above-mentioned metal protection layer composition in going metal hollow out anti-counterfeiting technology.Particularly, cover on the PET film that is coated with metallic aluminium with the mask of being with the little literal of hollow out, then described metal protection layer composition is coated on (thickness of coating is generally the 1-2 micron) on the described mask, remove mask, little literal is printed on the aluminium plating film; What will have little literal places baking oven to aluminium plating film, places down 5-20 after second at 80-120 ℃, and above-mentioned aluminium plating film is soaked 5-20 second in corrosive fluid, and the taking-up aluminium plating film is with flushing with clean water, dry up the anti-false sign that can obtain with little literal.Described " removing metal " refers to and is being coated with the metal that is not coated with the zone of described metal protection layer composition on the material of the metal corrosion that is corroded, and the metal that is coated with the zone of described metal protection layer composition still keeps.
Below will describe the present invention by embodiment.
Embodiment 1
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Under 25 ℃, the 13g Nitrocellulose is mixed with 37g ethyl acetate and 19g methylethylketone, be stirred to no post precipitation, add the 19g polyester, stir; Add 13g aliphatic isocyanates and 25g chalk again, stir, obtain metal protection layer composition X1.
Embodiment 2
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Under 25 ℃, the 17g Nitrocellulose is mixed with 12g butylacetate and 19g methylethylketone, be stirred to no post precipitation, add the 28g polyester, stir; Add 23g aliphatic isocyanates and 15g titanium dioxide again, stir, obtain metal protection layer composition X2.
Embodiment 3
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Under 25 ℃, the 25g Nitrocellulose is mixed with 22g ethyl acetate and 54g pimelinketone, be stirred to no post precipitation, add the 13g polyester, stir; Add 6g aliphatic isocyanates and 6g chalk again, stir, obtain metal protection layer composition X3.
Embodiment 4
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Method according to embodiment 1 prepares the metal protection layer composition, and different is that the 37g ethyl acetate replaces with the mixture of 20g ethyl acetate and 17g pimelinketone, obtains metal protection layer composition X4.
Embodiment 5
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Method according to embodiment 3 prepares the metal protection layer composition, and different is that the consumption of described ethyl acetate is that the consumption of 16g, described pimelinketone is 60g, obtains metal protection layer composition X5.
Embodiment 6
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Method according to embodiment 3 prepares the metal protection layer composition, and different is, the consumption of described ethyl acetate is 65g, and the consumption of described pimelinketone is 11g, obtains metal protection layer composition X6.
Embodiment 7
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Method according to embodiment 3 prepares the metal protection layer composition, and different is that described organic solvent is toluene all, obtains metal protection layer composition X7.
Embodiment 8
This embodiment is used for explanation metal protection layer composition provided by the invention and preparation thereof.
Method according to embodiment 1 prepares the metal protection layer composition, and different is, is that 160 polyester (680BA, Bayer Material Science company limited) replaces the polyester among the embodiment 1 with hydroxyl value.Obtain metal protection layer composition X8 of the present invention.
Embodiment 9
This embodiment is used for explanation metal provided by the invention
Method according to embodiment 1 prepares the metal protection layer composition; different is; be that the Nitrocellulose (available from Dongguan City Triratna chemical industry company limited) of 9.5 weight % replaces the Nitrocellulose among the embodiment 1 with nitrogen content, obtain metal protection layer composition X9 of the present invention.
Comparative Examples 1
This Comparative Examples is used for metal protection layer composition and the preparation thereof of explanation reference.
Method according to embodiment 1 prepares the metal protection layer composition, and different is, is that 80 polyester (870BA, Bayer Material Science company limited) replaces the polyester among the embodiment 1 with hydroxyl value.Obtain metal protection layer composition D1.
Comparative Examples 2
This Comparative Examples is used for metal protection layer composition and the preparation thereof of explanation reference.
Method according to embodiment 1 prepares the metal protection layer composition; different is; be that the Nitrocellulose (available from Dongguan City Triratna chemical industry company limited) of 14 weight % replaces the Nitrocellulose among the embodiment 1 with nitrogen content, obtain metal protection layer composition D2.
Test case 1-9
Test case 1-9 is used for explanation metal protection layer composition provided by the invention and adhesivity, adhesivity, the recoatability of metal level and clarity, online differentiability and the drying property that contains the little literal of band hollow out of described metal protection layer composition.
(1) preparation of specimen:
Mask with the little literal of band hollow out covers on the PET film of aluminizing; the metal protection layer composition X1-X9 that embodiment 1-9 is prepared carries out blade coating at mask then; coating thickness is 1.5 microns; remove mask; little literal is printed on the aluminium plating film; aluminium plating film was placed 8 seconds in 100 ℃ baking oven; and then aluminium plating film soaked 8 seconds in corrosive fluid (corrosive fluid for preparing according to the method among the US3647508); take out aluminium plating film, with flushing with clean water, dry up and be the specimen of being with the little literal of hollow out.
(2) literal clarity:
(model is MG10081-2 with 40 times of magnifying glasses, available from power source, Shenzhen detecting instrument company limited) observe facing to little literal of specimen, if little literal svelteness, neat in edge then are cited as " good ", if literal is fuzzy or literal line edge irregularity then is cited as " poor ".The gained result is as shown in table 1.
(3) adhesivity:
Observe facing to little literal of specimen with 40 times of magnifying glasses, if protective layer and the melts combine at specimen literal place are complete, are cited as " good " without any peeling off then, otherwise are cited as " poor ".The gained result is as shown in table 1.
(4) online differentiability:
In print the process of various fine patterns to the metal-plated membrane with the present composition, if by naked eyes can intuitively distinguish or equipment can online detection text printout quality and Fine Mapping printing situation then be cited as " good ", otherwise be cited as " poor ".The gained result is as shown in table 1.
(5) drying property:
The specimen doubling (coated face is to coated face) that step (1) is obtained, and firmly open gently after the compacting, if then be cited as " good " without any the sign of adhesion, otherwise be cited as " poor ".The gained result is as shown in table 1.
(6) alkali resistance:
The specimen that step (1) is obtained is immersed in immersion taking-up after 30 minutes in the sodium hydroxide solution that concentration is 2 weight %, with drying after the washed with de-ionized water.If aluminium lamination also complete remaining on the cheque paper then is cited as " good "; If aluminium lamination also has major part to remain on the cheque paper then to be cited as " in "; If having disappeared, aluminium lamination completely dissolve or major part then be cited as " poor ".The gained result is as shown in table 1.
(7) film-forming properties:
Utilize the trans anilox roll coating method of end charging that the metal protection layer composition among the embodiment 1-9 is coated on the PET transparent plastic film, coating thickness is 1.5 microns, if coating energy complete drying also formed smooth, even, continuous rete before complete drying, then be cited as film-forming properties " good "; If coating can complete drying also formed continuous rete before complete drying, but smooth and even inadequately, then be cited as film-forming properties " in "; If coating energy complete drying, but before complete drying, can not form continuous rete, then be cited as film-forming properties " poor ".The gained result is as shown in table 1.
(8) recoatability
Utilize the trans anilox roll coating method of end charging that the metal protection layer composition among the embodiment 1-9 is coated on the PET transparent plastic film; coating thickness is 1.5 microns; after treating the coating complete drying; be coated with thereon and scrape one deck acrylate coatings; coating thickness is 1.5 microns, and dry back is bonded on this coating with the 3M600 scotch tape peels off.If acrylate coatings and base material are (namely; the coat of metal composition layer) do not separate fully and then be cited as recoatability " good "; if acrylate coatings has small portion to separate then with base material to be cited as " in ", if acrylate coatings separates then fully with base material and is cited as " poor ".The gained result is as shown in table 1.
Contrast test example 1-2
According to the method for test case 1-9 film-forming properties and the recoatability of the metal protection layer composition D1 that prepared by Comparative Examples 1-2 and D2 and the clarity, adhesivity, online differentiability, drying property and the alkali resistance that contain the little literal of band hollow out of described metal protection layer composition are tested.
Table 1
| Numbering | The literal clarity | Online differentiability | Adhesivity | Drying property | Alkali resistance | Film-forming properties | Recoatability |
| Embodiment 1 | Good | Good | Good | Good | Good | Good | Good |
| Embodiment 2 | Good | Good | Good | Good | Good | Good | Good |
| Embodiment 3 | Good | Good | Good | Good | Good | Good | Good |
| Embodiment 4 | Good | Good | Good | Good | Good | Good | Good |
| Embodiment 5 | Good | Good | Good | Good | Good | In | Good |
| Embodiment 6 | Good | Good | Good | Good | Good | In | Good |
| Embodiment 7 | In | Good | Good | Good | Good | In | Good |
| Embodiment 8 | Good | Good | In | In | In | Good | Good |
| Embodiment 9 | In | Good | Good | Good | In | In | Good |
| Comparative Examples 1 | Good | Good | Difference | Difference | Difference | Good | Good |
| Comparative Examples 2 | Good | Good | Difference | Good | Difference | Difference | Difference |
From the result of table 1 as can be seen, metal protection layer composition provided by the invention and metal level binding property be good, can effectively prevent corrosive fluid to the corrosion of metal level, and have good recoatability and film-forming properties.
Claims (11)
1. a metal protection layer composition is characterized in that, is benchmark with the gross weight of described composition, and described composition contains following component:
(1) polyester of 10-25 weight %, described polyester are hydroxyl value greater than 120 to 150 collateralization hydroxyl polyester; Described polyester refers to the polymkeric substance that formed by dibasic alcohol or polyvalent alcohol and diprotic acid or polyprotonic acid polycondensation; The number-average molecular weight of described polyester is 200-2000;
(2) Nitrocellulose of 10-20 weight %, described Nitrocellulose are that nitrogen content is the low nitrogen Nitrocellulose of 10-12 weight %;
(3) linking agent of 5-20 weight %, described linking agent are aliphatic isocyanates;
(4) pigment of 5-20 weight %; And
(5) organic solvent of 25-60 weight %.
2. metal protection layer composition according to claim 1 wherein, adopts falling ball method to measure the viscosity of described Nitrocellulose, and the falling sphere time under 25 ℃ is for being not more than 1/16 second.
3. metal protection layer composition according to claim 1, wherein, in the described aliphatic isocyanates not by amination-content of NCO is 10-25 weight %; The number-average molecular weight of described aliphatic isocyanates is 100-800.
4. metal protection layer composition according to claim 1, wherein, described pigment is selected from one or more in titanium dioxide, ferric oxide, silicon-dioxide, kaolin, talcum and the phthalocyanine blue.
5. metal protection layer composition according to claim 1, wherein, described organic solvent is selected from one or more in fatty acid ester series solvent, ketone series solvent and the benzene series solvent.
6. metal protection layer composition according to claim 5, wherein, described organic solvent is the mixed solvent of fatty acid ester series solvent and ketone series solvent; The weight ratio of described fatty acid ester series solvent and ketone series solvent is 1:0.5-2.5; Described fatty acid ester series solvent is selected from one or more in methyl acetate, ethyl acetate, propyl acetate and the butylacetate, and described ketone series solvent is selected from one or more in acetone, butanone, espeleton, methylpentanone and the pimelinketone.
7. metal protection layer composition according to claim 6, wherein, described espeleton is mibk.
8. metal protection layer composition according to claim 1, wherein, described composition also contains auxiliary agent; Gross weight with described composition is benchmark, and the content of described auxiliary agent is 0.1-5 weight %; Described auxiliary agent is selected from one or more in siccative, flow agent, antioxidant and the defoamer.
9. coat of metal preparation of compositions method, this method comprises polyester, Nitrocellulose, linking agent, pigment and organic solvent is mixed, it is characterized in that, the consumption of each material makes, is benchmark with the gross weight of described composition, and the content of described polyester is 10-25 weight %, the content of described Nitrocellulose is 10-20 weight %, the content of described linking agent is 5-20 weight %, and the content of described pigment is 5-20 weight %, and the content of described organic solvent is 25-60 weight %; And described polyester is hydroxyl value greater than 120 to 150 collateralization hydroxyl polyester, and described Nitrocellulose is that nitrogen content is the low nitrogen Nitrocellulose of 10-12 weight %, and described linking agent is aliphatic isocyanates; Described polyester refers to the polymkeric substance that formed by dibasic alcohol or polyvalent alcohol and diprotic acid or polyprotonic acid polycondensation; The number-average molecular weight of described polyester is 200-2000.
10. method according to claim 9, wherein, the method that polyester, Nitrocellulose, linking agent, pigment and organic solvent are mixed is for mixing described Nitrocellulose, polyester, linking agent and pigment successively with organic solvent.
11. the application of metal protection layer composition in going metal hollow out anti-counterfeiting technology is characterized in that, described metal protection layer composition is any described metal protection layer composition among the claim 1-8.
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| CN105295681A (en) * | 2014-06-29 | 2016-02-03 | 江苏飞翔涂料实业总公司 | Fast drying paint |
| CN107556889A (en) * | 2017-10-17 | 2018-01-09 | 江苏欣安新材料技术有限公司 | A kind of coil coating and its production method |
| US11827808B2 (en) * | 2019-02-01 | 2023-11-28 | Praxair S.T. Technology, Inc. | Erosion and corrosion resistant overlay coating systems for protection of metal components |
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Address after: 100070 No. 6 Spark Road, Science City, Beijing, Fengtai District Patentee after: ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 100070 No. 6 Spark Road, Science City, Beijing, Fengtai District Patentee before: ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co.,Ltd. Patentee before: China Banknote Printing and mint General Company |
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