CA1158142A - Method of bonding silicone rubber to non-silicone adhesive - Google Patents
Method of bonding silicone rubber to non-silicone adhesiveInfo
- Publication number
- CA1158142A CA1158142A CA000386513A CA386513A CA1158142A CA 1158142 A CA1158142 A CA 1158142A CA 000386513 A CA000386513 A CA 000386513A CA 386513 A CA386513 A CA 386513A CA 1158142 A CA1158142 A CA 1158142A
- Authority
- CA
- Canada
- Prior art keywords
- silicone
- adhesive
- silicone rubber
- pressure sensitive
- sensitive adhesive
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2319/00—Synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2581/00—Seals; Sealing equipment; Gaskets
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/006—Presence of polysiloxane in the substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31667—Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
Abstract
ABSTRACT
A method of bonding a silicone rubber to a non-silicone pressure sensitive adhesive comprising the steps of treating the surface of the silicone rubber to be bonded with a silicone ad-hesive, and thereafter applying a layer of the non-silicone pres-sure sensitive adhesive to the treated silicone rubber surface.
A method of bonding a silicone rubber to a non-silicone pressure sensitive adhesive comprising the steps of treating the surface of the silicone rubber to be bonded with a silicone ad-hesive, and thereafter applying a layer of the non-silicone pres-sure sensitive adhesive to the treated silicone rubber surface.
Description
As is well known in the art, silicone rubber has a low energy surface and other materials can be bonded thereto only with difficulty. This is particularly true with respect to non-silicone materials. Thus when it is desired to apply an adhesive to a silicone rubber surface, a silicone adhesive must normally be employed. Such adhesives have certain drawbacks, however, in that they require extensive mixing, application and curing equip-ment. In this regard, silicone adhesives normally must be dried of all solvent and then cured by adding a curing agent such as benzoyl peroxide and thereafter heating for periods of minutes.
Room temperature curing is also possible with other agents (e.g.
amino functional silane) but again production delay results.
It is therefore an object of the present invention to provide a method of bonding silicone rubber to a non-silicone pressure sensitive adhesive. Once the non-silicone pressure sensitive adhesive is bonded to the silicone rubber, the rubber may be quickly and easily used in a variety of ways by the con-sumer.
For example, according to the invention silicone rubber weather stripping may be bonded to one side of a double sided non-silicone pressure sensitive adhesive tape or strip. The weather strip may then be quickly and easily applied to the door or window frame without the familiar problem of separation of the weather strip from its adhesive backing.
By providing for the bonding of double-sided pressure sensitive adhesive tapes or strips to silicone rubber, the present invention also permits the use of high speed production equipment.
Thus while the use of conventional silicone adhesives requires the curing steps discussed above, the present invention renders such steps unnecessary.
1 ~$~2 Looklng then to the method according to the invention, a silicone rubber, either solid or cellular, is first surface treated with a commercially available low tack silicone adhesive.
The silicone adhesive is preferably one formulated to yield a high resin to gum ratio which in turn yields a low tack or tack-free surface.
Before applying the silicone adhesive, it is preferably diluted to an appropriate solids content and viscosity with a suitable solvent such as toluene. The silicone aahesive may then be applied to the silicone rubber in any suitable manner such as by brush, roller, or a draw down device. The adhesive is then dried of solvent such as by forced air or radiation (e.g. infrared).
The non-silicone pressure sensitive adhesive can then be directly laminated over the cool or slightly warm modified sur-face of the silicone rubber. Alternatively, the non-silicone pressure sensitive adhesive may be applied to the silicone rubber at some future time. In either case, it has been found that an improved bond is obtained between the non~silicone adhesive and the surface of the silicone rubber~
The types of non-silicone adhesives usable in accordance with the invention will be readily apparent to one skilled in the art. These adhesives include natural rubber adhesives, acrylic adhesives and synthetic rubber adhesives such as styrene butadiene rubber adhesives.
With respect to the choice of an appropriate silicone adhesive, General Electric Silgrip~ adhesive SR 529, which is believed to be a methyl based silicone adhesive having a high resin to gum ratio, has been found to be satisfactory. Silgrip~
SR 529 is described in General Electric product data as having the following properties:
PROPERTY VALUE
Non-Volatile Content, ~ 55 + 1 Color Light straw, translucent Viscosity, CPS 1000 to 5000 Brookfield RVF, #3 20 rpm at 25C
Specific Gravity .984-1.008 Wt. Per Gallon, Lbs. 8.2-8.4 Solvent Toluene Adhesion (g/2.54 cm) 1440-2800 Tack Dry Storage Stability, 25C (77F) 6 months minimum Closed Container While this adhesive is described as a pressure sensitive adhesive, it is important to note that it yields a dry (i.e. non-tacky) surface and hence it is not sufficiently pressure sensitive for household applications.
It is also important to note that once the silicone adhesive has been applied to the silicone rubber and dried, it is neither necessary nor desirable to cure the adhesive (i.e. to cause cross-linking to take place within the adhesive) by the addition of peroxide or the like. This is to be distinguished from conventional methods of bonding utilizing silicone adhesives wherein it is necessary to cure the silicone adhesive in order to obtain the desired adhesive properties. In this regard, the General Electric literature instructions as to the use of its Silgrip~ SR 529 stress the necessity of curing with benzoyl per-oxide or amino functional silane for maximum cohesive strength.
It will be apparent to one skilled in the art that the bonded composition of silicone rubber and non-silicone adhesive 115~42 may take a variety of forms. As pointed out above, the treated silicone rubber surface may have bonded thereto a double-sided non-silicone pressure sensitive tape or strip. Alternatively, a non-silicone pressure sensitive adhesive composition may be applied directly to the treated silicone rubber surface without employing an adhesive carrying tape or strip. In this latter embodiment, the exposed surface of the pressure sensitive adhesive serves to adhere the silicone rubber to the structure in question.
It is also important to note that by permitting the use of non-silicone adhesives to adhere silicone rubber to various surfaces, the present invention also makes available a much wider variety of conventional release liners and the like. Many such liners cannot be used with silicone adhesives and the use of non-silicone adhesives overcomes this problem.
EXA~LE
GE Silgrip~ SR 529 was diluted in toluene and applied at the end of a silicone rubber extruding process in an amount to yield a dry film thickness of 0.0005 to 0.001 inches. Drying was accomplished with an oven temperature from 300F to 350F for a period of from about 15 seconds to about one minute. Non-silicone pressure sensitive adhesive was then directly laminated over the treated surface. An acceptable bond was obtained both when the adhesive was laminated while the treated surface was still warm and when the surface was allowed to cool or after storage.
Room temperature curing is also possible with other agents (e.g.
amino functional silane) but again production delay results.
It is therefore an object of the present invention to provide a method of bonding silicone rubber to a non-silicone pressure sensitive adhesive. Once the non-silicone pressure sensitive adhesive is bonded to the silicone rubber, the rubber may be quickly and easily used in a variety of ways by the con-sumer.
For example, according to the invention silicone rubber weather stripping may be bonded to one side of a double sided non-silicone pressure sensitive adhesive tape or strip. The weather strip may then be quickly and easily applied to the door or window frame without the familiar problem of separation of the weather strip from its adhesive backing.
By providing for the bonding of double-sided pressure sensitive adhesive tapes or strips to silicone rubber, the present invention also permits the use of high speed production equipment.
Thus while the use of conventional silicone adhesives requires the curing steps discussed above, the present invention renders such steps unnecessary.
1 ~$~2 Looklng then to the method according to the invention, a silicone rubber, either solid or cellular, is first surface treated with a commercially available low tack silicone adhesive.
The silicone adhesive is preferably one formulated to yield a high resin to gum ratio which in turn yields a low tack or tack-free surface.
Before applying the silicone adhesive, it is preferably diluted to an appropriate solids content and viscosity with a suitable solvent such as toluene. The silicone aahesive may then be applied to the silicone rubber in any suitable manner such as by brush, roller, or a draw down device. The adhesive is then dried of solvent such as by forced air or radiation (e.g. infrared).
The non-silicone pressure sensitive adhesive can then be directly laminated over the cool or slightly warm modified sur-face of the silicone rubber. Alternatively, the non-silicone pressure sensitive adhesive may be applied to the silicone rubber at some future time. In either case, it has been found that an improved bond is obtained between the non~silicone adhesive and the surface of the silicone rubber~
The types of non-silicone adhesives usable in accordance with the invention will be readily apparent to one skilled in the art. These adhesives include natural rubber adhesives, acrylic adhesives and synthetic rubber adhesives such as styrene butadiene rubber adhesives.
With respect to the choice of an appropriate silicone adhesive, General Electric Silgrip~ adhesive SR 529, which is believed to be a methyl based silicone adhesive having a high resin to gum ratio, has been found to be satisfactory. Silgrip~
SR 529 is described in General Electric product data as having the following properties:
PROPERTY VALUE
Non-Volatile Content, ~ 55 + 1 Color Light straw, translucent Viscosity, CPS 1000 to 5000 Brookfield RVF, #3 20 rpm at 25C
Specific Gravity .984-1.008 Wt. Per Gallon, Lbs. 8.2-8.4 Solvent Toluene Adhesion (g/2.54 cm) 1440-2800 Tack Dry Storage Stability, 25C (77F) 6 months minimum Closed Container While this adhesive is described as a pressure sensitive adhesive, it is important to note that it yields a dry (i.e. non-tacky) surface and hence it is not sufficiently pressure sensitive for household applications.
It is also important to note that once the silicone adhesive has been applied to the silicone rubber and dried, it is neither necessary nor desirable to cure the adhesive (i.e. to cause cross-linking to take place within the adhesive) by the addition of peroxide or the like. This is to be distinguished from conventional methods of bonding utilizing silicone adhesives wherein it is necessary to cure the silicone adhesive in order to obtain the desired adhesive properties. In this regard, the General Electric literature instructions as to the use of its Silgrip~ SR 529 stress the necessity of curing with benzoyl per-oxide or amino functional silane for maximum cohesive strength.
It will be apparent to one skilled in the art that the bonded composition of silicone rubber and non-silicone adhesive 115~42 may take a variety of forms. As pointed out above, the treated silicone rubber surface may have bonded thereto a double-sided non-silicone pressure sensitive tape or strip. Alternatively, a non-silicone pressure sensitive adhesive composition may be applied directly to the treated silicone rubber surface without employing an adhesive carrying tape or strip. In this latter embodiment, the exposed surface of the pressure sensitive adhesive serves to adhere the silicone rubber to the structure in question.
It is also important to note that by permitting the use of non-silicone adhesives to adhere silicone rubber to various surfaces, the present invention also makes available a much wider variety of conventional release liners and the like. Many such liners cannot be used with silicone adhesives and the use of non-silicone adhesives overcomes this problem.
EXA~LE
GE Silgrip~ SR 529 was diluted in toluene and applied at the end of a silicone rubber extruding process in an amount to yield a dry film thickness of 0.0005 to 0.001 inches. Drying was accomplished with an oven temperature from 300F to 350F for a period of from about 15 seconds to about one minute. Non-silicone pressure sensitive adhesive was then directly laminated over the treated surface. An acceptable bond was obtained both when the adhesive was laminated while the treated surface was still warm and when the surface was allowed to cool or after storage.
Claims (11)
1. A method of bonding a silicone rubber to a non-silicone pressure sensitive adhesive comprising the steps of treating the surface of the silicone rubber to be bonded with a silicone adhesive, and thereafter applying a layer of the non-silicone pressure sensitive adhesive to the treated silicone rubber surface.
2. A method according to claim 1 wherein the silicone adhesive is not cured with a curing agent prior to the application of the non-silicone pressure sensitive adhesive.
3. A method according to claim 2 wherein the non-silicone pressure sensitive adhesive is applied to the treated silicone rubber surface in the form of a carrier sheet having non-silicone pressure sensitive adhesive on both sides of said sheet.
4. A method according to claim 3 wherein the silicone adhesive is diluted prior to being applied to the silicone rubber.
5. A method according to claim 4 wherein the silicone adhesive is diluted with toluene.
6. A method according to claim S wherein the toluene solvent is dried from the treated silicone rubber surface prior to the application of the non-silicone adhesive.
7. A method according to claim 6 wherein the silicone adhesive is formulated to yield a high resin to gum ratio.
8. A method of bonding a non-silicone pressure sensitive adhesive to silicone rubber weather stripping comprising the steps of treating the surface of the weather stripping with a solution of silicone adhesive dissolved in toluene, drying the toluene from the treated surface so as to yield a low tack or tack-free surface, and thereafter applying to the treated surface a carrying tape or strip having on both sides thereof a non-silicone pressure adhesive.
9. A method according to claim 1 wherein the silicone adhesive is diluted prior to being applied to the silicone rubber.
10. A method according to claim 2 wherein the silicone adhesive is diluted prior to being applied to the silicone rubber.
11. A method according to claim 9 or 10 wherein the silicone adhesive is diluted with toluene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US215,133 | 1980-12-10 | ||
| US06/215,133 US4351686A (en) | 1980-12-10 | 1980-12-10 | Method of bonding silicone rubber to non-silicone adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1158142A true CA1158142A (en) | 1983-12-06 |
Family
ID=22801793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000386513A Expired CA1158142A (en) | 1980-12-10 | 1981-09-23 | Method of bonding silicone rubber to non-silicone adhesive |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4351686A (en) |
| AU (1) | AU7744181A (en) |
| CA (1) | CA1158142A (en) |
| DE (1) | DE3148343A1 (en) |
| IT (1) | IT8149838A0 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612075A (en) * | 1985-06-12 | 1986-09-16 | The D. L. Auld Company | Substrateless trim strip and method of making |
| US4615754A (en) * | 1985-06-12 | 1986-10-07 | The D. L. Auld Company | Substrateless decorative emblem and method of making |
| US4737225A (en) * | 1985-06-12 | 1988-04-12 | The D. L. Auld Company | Method of making a substrateless decorative article |
| US4716052A (en) * | 1986-01-21 | 1987-12-29 | The D. L. Auld Company | Method of making pressure sensitive adhesive tag or label stock |
| US4801479A (en) * | 1987-03-13 | 1989-01-31 | The D. L. Auld Company | Decorative article and process for making |
| US4781952A (en) * | 1987-03-13 | 1988-11-01 | The D. L. Auld Company | Decorative article and process for making |
| JP2018507926A (en) * | 2014-12-23 | 2018-03-22 | スリーエム イノベイティブ プロパティズ カンパニー | Double-sided multilayer adhesive |
| FR3043407B1 (en) * | 2015-11-10 | 2017-11-24 | Saint Gobain Performance Plastics France | BONDING PROCESS |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2902389A (en) * | 1955-02-25 | 1959-09-01 | Dow Corning | Process of bonding polysiloxanes to a surface and the resulting product |
| US2860083A (en) * | 1956-01-07 | 1958-11-11 | Silicone rubber adhesive |
-
1980
- 1980-12-10 US US06/215,133 patent/US4351686A/en not_active Expired - Lifetime
-
1981
- 1981-09-23 CA CA000386513A patent/CA1158142A/en not_active Expired
- 1981-11-12 AU AU77441/81A patent/AU7744181A/en not_active Abandoned
- 1981-12-04 IT IT8149838A patent/IT8149838A0/en unknown
- 1981-12-07 DE DE19813148343 patent/DE3148343A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US4351686A (en) | 1982-09-28 |
| IT8149838A0 (en) | 1981-12-04 |
| DE3148343A1 (en) | 1982-09-16 |
| AU7744181A (en) | 1982-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |