Patent US4077948A successfully refreshed from Google Patents.
US4077948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal deactivators as adhesion promotors for vulcanizable elastomers to metals
Assignee: Novartis Corp
•
Filing: 1976-04-07
•
Granted: 1978-03-07
•
Expires: 1996-04-07
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 22:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/25; C08K5/29; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10S524/00; Y10S524/925; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31707
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 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 percent to 10 percent by weight based on the weight of the elastomer of a metal deactivating compound of the formula ##STR273## wherein R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , and R 9 are each independently hydrogen, lower alkyl, lower alkoxy, or a phenyl group, and (b) vulcanizing the composition while it is in contact with the metal surface.
Claim 2
Independent Claim
116 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 percent to 10 percent by weight based on the weight of the elastomer of a metal deactivating compound of the formula ##STR273## wherein R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , and R 9 are each independently hydrogen, lower alkyl, lower alkoxy, or a phenyl group, 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
18 words
A method of claim 1 wherein the methylene acceptor and methylene donor consists essentially of hexamethylenetetramine and resorcinol.
Claim 5
Dependent Claim
43 words
A method of claim 3 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 6
Dependent Claim
19 words
A method of claim 1 wherein the methylene acceptor and methylene donor consists essentially of a melamine and resorcinol.
Claim 7
Dependent Claim
23 words
A method of claim 5 wherein said melamine is selected from dimethylolmelamine, tri-methylolmelamine, partially etherified trimethylolmelamine, fully etherified hexamethylolmelamine, and fully etherified tetra-methylolenzoquanamine.
References Cited (Backward Citations)
US2018645A
Cited
US2912355A
Cited
US3052580A
Cited
US3110696A
Cited
US3357944A
Cited
US3596696A
Cited
US3517722A
Cited
US3660438A
Cited
US3773830A
Cited
US3734885A
Cited
US3907925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |