US4374694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bonding elastomers to metals
Assignee: Lord Corp
•
Filing: 1981-06-22
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Granted: 1983-02-22
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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 1,2-oxirane reactive monomer.
Inventors
- 👤 Donald R. Blenner
- 👤 Herman V. Boenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A method for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising (a) exposing at least one metal element to a glow discharge plasma consisting essentially of a gaseous oxirane reactive monomer; (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 said 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
85 words
A method for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising (a) exposing at least one metal element to a glow discharge plasma consisting essentially of a gaseous oxirane reactive monomer; (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 said 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 reactive monomer comprises styrene oxide.
Claim 4
Dependent Claim
113 words
A method according to claim 1 for bonding vulcanizable natural and synthetic rubbers to metal substrates comprising: (a) exposing at least one metal element to a glow discharge plasma consisting essentially of a non-reactive gas; (b) exposing at least one of said non-reactive gas-plasma-exposed substrates to a glow discharge plasma consisting essentially of a gaseous oxirane reactive monomer; (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 said 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 5
Dependent Claim
13 words
A method according to claim 3 wherein said reactive monomer comprises styrene oxide.
Claim 6
Dependent Claim
24 words
A method according to claim 3 wherein said non-reactive gas is selected from the group consisting of helium, nitrogen, neon, argon, krypton and xenon.
Claim 7
Dependent Claim
13 words
A method according to claim 5 wherein said reactive monomer comprises styrene oxide.
Claim 8
Dependent Claim
12 words
A method according to claim 3 wherein said non-reactive gas comprises argon.
Claim 9
Dependent Claim
13 words
A method according to claim 7 wherein said reactive monomer comprises styrene oxide.
References Cited (Backward Citations)
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US3669825A
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US4188273A
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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) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |