Patent US4306930A successfully refreshed from Google Patents.
US4306930A
Expired / Lapsed
US
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Metal deactivators as adhesion promotors for vulcanizable elastomers to metals
Assignee: BASF Corp
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Filing: 1979-10-22
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Granted: 1981-12-22
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Expires: 1999-10-22
Abstract
Abstract Adhesion of metals to vulcanizable elastomers is promoted by a process of incorporating into the elastomer a metal deactivator and then vulcanizing the elastomeric composition while it is in contact with the metal surface.
Inventors
- 👤 George K. Cowell
- 👤 David J. Cherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:37
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/29; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A method of improving adhesion between a vulcanizable elastomeric composition and a metal surface to provide a strong and durable bond, which method comprises (a) adding to a vulcanizable elastomeric composition a methylene acceptor and a methylene donor reactable therewith, and from 0.05% to 10% by weight based on the weight of the elastomer of a metal deactivating compound of the formula ##STR271## wherein R 12 is a lower alkyl group containing from 1 to 6 carbon atoms, R 13 is hydrogen or a lower alkyl group containing from 1 to 6 carbon atoms, and R 14 is hydrogen, an alkanoyl group containing 2 to 18 carbon atoms or a group represented by the formula ##STR272## and n is an integer from 0 to 5, and (b) vulcanizing the composition while it is in contact with the metal surface.
Claim 2
Independent Claim
139 words
A method of improving adhesion between a vulcanizable elastomeric composition and a metal surface to provide a strong and durable bond, which method comprises (a) adding to a vulcanizable elastomeric composition a methylene acceptor and a methylene donor reactable therewith, and from 0.05% to 10% by weight based on the weight of the elastomer of a metal deactivating compound of the formula ##STR271## wherein R 12 is a lower alkyl group containing from 1 to 6 carbon atoms, R 13 is hydrogen or a lower alkyl group containing from 1 to 6 carbon atoms, and R 14 is hydrogen, an alkanoyl group containing 2 to 18 carbon atoms or a group represented by the formula ##STR272## and n is an integer from 0 to 5, and (b) vulcanizing the composition while it is in contact with the metal surface.
Claim 3
Dependent Claim
43 words
The method of claim 1 wherein the vulcanizable elastomer is selected from polybutadiene, polyisoprene, or a blend of natural rubber with (a) styrene-butadiene copolymer, (b) polybutadiene, (c) polyisoprene, or (d) unsaturated ethylene-propylene interpolymer, or a ternary blend of any of the above polymers.
Claim 4
Dependent Claim
30 words
The method of claim 1, wherein R 12 and R 13 are alkyl groups containing 1 to 4 carbon atoms and n is an integer of from 0 to 2.
Claim 5
Dependent Claim
15 words
The method of claim 3, wherein R 14 is the group of the formula ##STR273##
Claim 6
Dependent Claim
10 words
The method of claim 4, wherein said compound is symmetrical.
Claim 7
Dependent Claim
10 words
The method of claim 5, wherein said compound is N,N'-bis-beta-(3,5-di-t-butyl-4-hydroxyphenyl)-propionylhydrazine.
Claim 8
Dependent Claim
10 words
The method of claim 5, wherein said compound is N,N'-(3,5-di-t-butyl-4-hydroxy-benzoyl)hydrazine.
Claim 9
Dependent Claim
19 words
The method of claim 1, wherein the methylene acceptor and the methylene donor consist essentially of hexamethylenetetramine and resorcinol.
Claim 10
Dependent Claim
20 words
The method of claim 1, wherein the methylene acceptor and the methylene donor consist essentially of a melamine and resorcinol.
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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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |