Patent US4396450A successfully refreshed from Google Patents.
US4396450A
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Method for bonding elastomers to metals
Assignee: Lord Corp
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Filing: 1981-06-22
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Granted: 1983-08-02
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Expires: 2001-06-22
Abstract
Abstract Environmental resistance of rubber-metal bonded assemblies is significantly improved by a process comprising treating such substrates in a "low temperature" plasma comprising at least one sulfur-containing reactive monomer.
Inventors
- 👤 Donald R. Blenner
- 👤 Herman V. Boenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:28
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; B29; B29C; B29C59/00; B29C59/10; B29C59/14; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; B29C2059/147; B29K; B29K2021/00; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
A method for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising: (a) exposing at least one metal element to a plasma of at least one sulfur-containing reactive monomer selected from the group consisting of thiophene, 2-ethylthiophene and tetrahydrothiophene; (b) applying to at least one plasma-exposed surface of said metal element an adhesive composition suitable for bonding natural and synthetic rubber to metal; (c) contacting such adhesively-coated metal element with a vulcanizable rubber composition; and (d) subjecting the resultant assembly to conditions sufficient to vulcanize said rubber and cure said adhesive.
Claim 2
Independent Claim
92 words
A method for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising: (a) exposing at least one metal element to a plasma of at least one sulfur-containing reactive monomer selected from the group consisting of thiophene, 2-ethylthiophene and tetrahydrothiophene; (b) applying to at least one plasma-exposed surface of said metal element an adhesive composition suitable for bonding natural and synthetic rubber to metal; (c) contacting such adhesively-coated metal element with a vulcanizable rubber composition; and (d) subjecting the resultant assembly to conditions sufficient to vulcanize said rubber and cure said adhesive.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said sulfur-containing reactive monomer is thiophene.
Claim 4
Dependent Claim
13 words
A method according to claim 1 wherein said sulfur-containing reactive monomer is 2-ethylthiophene.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein said sulfur-containing reactive monomer is tetrahydrothiophene.
Claim 6
Independent Claim
115 words
A method for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising: (a) exposing at least one metal substrate to a plasma of at least one non-reactive gas; (b) exposing at least one of such non-reactive gas plasma-exposed substrates to a plasma of at least one sulfur-containing reactive monomer selected from a group consisting of thiophene, 2-ethylthiophene and tetrahydrothiophene; (c) applying to at least one reactive monomer plasma-exposed surface of said metal element an adhesive composition suitable for bonding natural and synthetic rubber to metal; (d) contacting such adhesively-coated metal element with a vulcanizable rubber composition; and (e) subjecting the resultant assembly to conditions sufficient to vulcanize said rubber composition and cure said adhesive.
Claim 7
Independent Claim
115 words
A method for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising: (a) exposing at least one metal substrate to a plasma of at least one non-reactive gas; (b) exposing at least one of such non-reactive gas plasma-exposed substrates to a plasma of at least one sulfur-containing reactive monomer selected from a group consisting of thiophene, 2-ethylthiophene and tetrahydrothiophene; (c) applying to at least one reactive monomer plasma-exposed surface of said metal element an adhesive composition suitable for bonding natural and synthetic rubber to metal; (d) contacting such adhesively-coated metal element with a vulcanizable rubber composition; and (e) subjecting the resultant assembly to conditions sufficient to vulcanize said rubber composition and cure said adhesive.
Claim 8
Dependent Claim
13 words
A method according to claim 5 wherein said sulfur-containing reactive monomer comprises thiophene.
Claim 9
Dependent Claim
13 words
A method according to claim 5 wherein said sulfur-containing reactive monomer comprises 2-ethylthiophene.
Claim 10
Dependent Claim
13 words
A method according to claim 5 wherein said sulfur-containing reactive monomer comprises tetrahydrothiophene.
Claim 11
Dependent Claim
24 words
A method according to claim 5 wherein said non-reactive gas is selected from the group consisting of helium, nitrogen, neon, argon, krypton and xenon.
Claim 12
Dependent Claim
13 words
A method according to claim 9 wherein said sulfur-containing reactive monomer comprises thiophene.
Claim 13
Dependent Claim
13 words
A method according to claim 9 wherein said sulfur-containing reactive monomer comprises 2-ethylthiophene.
Claim 14
Dependent Claim
13 words
A method according to claim 9 wherein said sulfur-containing reactive monomer comprises tetrahydrothiophene.
Claim 15
Dependent Claim
27 words
A method according to claim 9 wherein said non-reactive gas is argon and said sulfur-containing monomer is selected from the group consisting of thiophene, 2-ethylthiophene and tetrahydrothiophene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |