US4366184A
Expired / Lapsed
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Method for bonding silicone elastomers to metal substrates
Assignee: Lord Corp
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Filing: 1981-06-22
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Granted: 1982-12-28
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Expires: 2001-06-22
Abstract
Abstract Adhesion of silicone elastomers to metal substrates, especially zinc phosphatized metal substrates, is significantly improved by exposing the substrate to a plasma comprising at least one organosilicon compound. In a preferred embodiment, the plasma-treated substrates are soaked in gaseous organosilicon monomer compound.
Inventors
- 👤 Robert A. Auerbach
- 👤 Herman V. Boenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; C; C09; C09D; C09D4/00; B05D2202/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
247 words
A method for bonding vulcanizable silicone elastomer compositions to metal substrates comprising: (a) treating at least one metal substrate in a plasma comprising at least one organosilicon monomer having the formula ##STR3## wherein R o is a divalent aliphatic, cycloaliphatic or aromatic radical having from one to 20 carbon atoms; R 1 is hydrogen, halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; X is halogen or --OR 2 , wherein R 2 is halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 8 carbon atoms; A is selected from the group consisting of hydrogen, hydroxy, mercapto, oxirane, carboxyl, isocyanato, acryloxy, methacryloxy and amino having the formula --NH R 5 , wherein R 5 is selected from the group consisting of hydrogen, monovalent aliphatic radicals containing from one to 8 carbon atoms, monovalent cycloaliphatic radicals having from 4 to 7 ring carbon atoms, phenyl, alkaryl radicals having 6 nuclear carbon atoms and containing one or more substituent alkyl groups having from one to 4 carbon atoms and --R 6 --NH--R 7 , wherein R 6 is selected from the group consisting of divalent aliphatic, cycloaliphatic and aromatic radicals having from one to 20 carbon atoms, and R 7 is the same as R 5 ; and a is zero or one; (b) contacting such plasma-treated metal substrate with a vulcanizable silicone rubber composition; and (c) subjecting the resultant assembly to conditions sufficient to vulcanize said elastomer.
Claim 2
Independent Claim
247 words
A method for bonding vulcanizable silicone elastomer compositions to metal substrates comprising: (a) treating at least one metal substrate in a plasma comprising at least one organosilicon monomer having the formula ##STR3## wherein R o is a divalent aliphatic, cycloaliphatic or aromatic radical having from one to 20 carbon atoms; R 1 is hydrogen, halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; X is halogen or --OR 2 , wherein R 2 is halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 8 carbon atoms; A is selected from the group consisting of hydrogen, hydroxy, mercapto, oxirane, carboxyl, isocyanato, acryloxy, methacryloxy and amino having the formula --NH R 5 , wherein R 5 is selected from the group consisting of hydrogen, monovalent aliphatic radicals containing from one to 8 carbon atoms, monovalent cycloaliphatic radicals having from 4 to 7 ring carbon atoms, phenyl, alkaryl radicals having 6 nuclear carbon atoms and containing one or more substituent alkyl groups having from one to 4 carbon atoms and --R 6 --NH--R 7 , wherein R 6 is selected from the group consisting of divalent aliphatic, cycloaliphatic and aromatic radicals having from one to 20 carbon atoms, and R 7 is the same as R 5 ; and a is zero or one; (b) contacting such plasma-treated metal substrate with a vulcanizable silicone rubber composition; and (c) subjecting the resultant assembly to conditions sufficient to vulcanize said elastomer.
Claim 3
Dependent Claim
12 words
A method according to claim 1 wherein said substrate is phosphatized metal.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said organosilicon plasma comprises a mixture of gamma-aminopropyltriethoxysilane and vinyltriethoxysilane.
Claim 5
Dependent Claim
12 words
A method according to claim 3 wherein said substrate is phosphatized metal.
Claim 6
Dependent Claim
276 words
A method according to claim 1 comprising: (a) treating at least one metal substrate in a plasma comprising at least one organosilicon monomer having the formula ##STR4## wherein R o is a divalent saturated or unsaturated acyclic, saturated or unsaturated cyclic or aromatic radical having from one to 20 carbon atoms; R 1 is hydrogen, halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; X is halogen or --OR 2 , wherein R 2 is halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 8 carbon atoms; A is selected from the group consisting of hydrogen, hydroxy, mercapto, oxirane, carboxyl, isocyanato, acryloxy, methacryloxy and amino having the formula --NH--R 5 , wherein R 5 is selected from the group consisting of hydrogen, monovalent aliphatic radicals containing from one to 8 carbon atoms, monovalent cycloaliphatic radicals having from 4 to 7 ring carbon atoms, phenyl, alkaryl radicals having 6 nuclear carbon atoms and containing one or more substituent alkyl groups having from one to 4 carbon atoms and --R 6 --NH--R 7 , wherein R 6 is selected from the group consisting of divalent aliphatic, cycloaliphatic and aromatic radicals having from one to 20 carbon atoms, and R 7 is the same as R 5 ; and a is zero or one, (b) soaking such plasma-treated metal substrate in gaseous organosilicon monomer having the formula ##STR5## wherein R o , R 1 , X, A and a are as previously defined; (c) contacting such plasma-treated metal substrate with a vulcanizable silicone rubber composition; and (d) subjecting the resultant assembly to conditions sufficient to vulcanize said elastomer.
Claim 7
Dependent Claim
12 words
A method according to claim 5 wherein said substrate is phosphatized metal.
Claim 8
Dependent Claim
18 words
A method according to claim 5 wherein said organosilicon plasma comprises a mixture of gamma-aminopropyltriethoxysilane and vinyl triethoxysilane.
Claim 9
Dependent Claim
18 words
A method according to claim 7 wherein said gaseous organosilicon monomer comprises a mixture of gamma-aminopropyltriethoxysilane and vinyltriethoxysilane.
Claim 10
Dependent Claim
12 words
A method according to claim 8 wherein said substrate is phosphatized metal.
Claim 11
Independent Claim
227 words
A method for enhancing adhesion between a metal substrate and vulcanizable silicone rubber comprising treating said substrate in an electrical discharge plasma comprising at least one organosilicon monomer having the formula ##STR6## wherein R o is a divalent saturated or unsaturated acyclic, saturated or unsaturated cyclic or aromatic radical having from one to 20 carbon atoms; R 1 is hydrogen, halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; X is halogen or --OR 2 , wherein R 2 is halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 8 carbon atoms; A is selected from the group consisting of hydrogen, hydroxy, mercapto, oxirane, carboxyl, isocyanato, acryloxy, methacryloxy and amino having the formula --NH--R 5 , wherein R 5 is selected from the group consisting of hydrogen, monovalent aliphatic radicals containing from one to 8 carbon atoms, monovalent cycloaliphatic radicals having from 4 to 7 ring carbon atoms, phenyl, alkaryl radicals having 6 nuclear carbon atoms and containing one or more substituent alkyl groups having from one to 4 carbon atoms and --R 6 --NH--R 7 , wherein R 6 is selected from the group consisting of divalent aliphatic, cycloaliphatic and aromatic radicals having from one to 20 carbon atoms, and R 7 is the same as R 5 ; and a is zero or one.
Claim 12
Independent Claim
227 words
A method for enhancing adhesion between a metal substrate and vulcanizable silicone rubber comprising treating said substrate in an electrical discharge plasma comprising at least one organosilicon monomer having the formula ##STR6## wherein R o is a divalent saturated or unsaturated acyclic, saturated or unsaturated cyclic or aromatic radical having from one to 20 carbon atoms; R 1 is hydrogen, halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; X is halogen or --OR 2 , wherein R 2 is halogen or a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 8 carbon atoms; A is selected from the group consisting of hydrogen, hydroxy, mercapto, oxirane, carboxyl, isocyanato, acryloxy, methacryloxy and amino having the formula --NH--R 5 , wherein R 5 is selected from the group consisting of hydrogen, monovalent aliphatic radicals containing from one to 8 carbon atoms, monovalent cycloaliphatic radicals having from 4 to 7 ring carbon atoms, phenyl, alkaryl radicals having 6 nuclear carbon atoms and containing one or more substituent alkyl groups having from one to 4 carbon atoms and --R 6 --NH--R 7 , wherein R 6 is selected from the group consisting of divalent aliphatic, cycloaliphatic and aromatic radicals having from one to 20 carbon atoms, and R 7 is the same as R 5 ; and a is zero or one.
Claim 13
Dependent Claim
17 words
A method according to claim 10 wherein said organosilicon plasma comprises and admixture of gamma-aminopropyltriethoxysilane and vinyltriethoxysilane.
Claim 14
Dependent Claim
38 words
A method according to claim 10 wherein said substrate is soaked in at least one gaseous organosilicon monomer having the formula ##STR7## wherein R o , R 1 , X, and A and a are as previously defined.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |