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Patent US4259404A successfully refreshed from Google Patents.
US4259404A
Expired / Lapsed
US
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Composite of polyamide bonded to rubber and method for making the same
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1977-08-15
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Granted: 1981-03-31
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Expires: 1997-08-15
Abstract
Abstract Rubber compounds are readily bonded to nylon or polyamides, particularly tire cords of polyamides in which a high proportion of the amide linkages are attached directly to aromatic rings, using a two-step dip process in which the first dip comprises a liquid dispersion or solution of an epoxide having an average of from about two to four epoxide groups per molecule and a molecular weight up to about 600 and the second dip comprises an aqueous dispersion of a mixture of a major amount of a rubbery vinyl pyridine copolymer and a minor amount of a heat reactable 2,6-bis(2,4-dihydroxy phenylmethyl)-4-chlorophenol composition. High H-adhesions are obtained with this process. It is particularly useful for the bonding to rubber compounds of crystalline polyamides having a large number of aromatic groups in the polymeric structure, e.g., "Fiber B".
Inventors
- 👤 Gerard E. van Gils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; B32B2270/00; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31725; Y10T428/3175; Y10T428/31757
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A polyamide reinforcing element useful in reinforcing rubber, said element containing a total of from about 3 to 7% by weight (dry) based on the weight of said element of an adhesive composition consisting essentially of a first deposit consisting essentially of a heat set epoxide from an epoxide having an average of from about 2 to 4 epoxide groups per molecule and a molecular weight of up to about 600 and a second deposit consisting essentially of a heat set mixture of a major amount of a rubbery vinyl pyridine copolymer and a minor amount of a heat reactable 2,6-bis(2,4-dihydroxy phenyl methyl)-4-chlorophenol composition.
Claim 2
Dependent Claim
104 words
A polyamide reinforcing element useful in reinforcing rubber, said element containing a total of from about 3 to 7% by weight (dry) based on the weight of said element of an adhesive composition consisting essentially of a first deposit consisting essentially of a heat set epoxide from an epoxide having an average of from about 2 to 4 epoxide groups per molecule and a molecular weight of up to about 600 and a second deposit consisting essentially of a heat set mixture of a major amount of a rubbery vinyl pyridine copolymer and a minor amount of a heat reactable 2,6-bis(2,4-dihydroxy phenyl methyl)-4-chlorophenol composition.
Claim 3
Dependent Claim
24 words
A polyamide reinforcing element according to claim 1 in which said first deposit comprises from about 0.01 to 1.5% by weight of said element.
Claim 4
Dependent Claim
67 words
A polyamide reinforcing element according to claim 1 where said rubbery vinyl pyridine copolymer is a copolymer of from about 60 to 80% by weight of butadiene-1,3, from 7 to 32% by weight of styrene, and from 7 to 22% by weight of 2-vinyl pyridine and where the parts by weight ratio of said rubbery vinyl pyridine-copolymer to said chlorophenol composition is from about 100:10 to 100:75.
Claim 5
Dependent Claim
30 words
A polyamide reinforcing element according to claim 3 where said copolymer is a blend of a terpolymer of butadiene-1,3, styrene and 2-vinyl pyridine and a copolymer of butadiene-1,3 and styrene.
Claim 6
Dependent Claim
53 words
A polyamide reinforcing element according to claim 3 where said element is a cord of linear long chain synthetic aromatic poly(para phenylene terephthalamide) in which at least 85% of the amide linkages are attached directly to aromatic rings, which is highly crystalline, and which has a modulus (grams/denier) of at least about 350.
Claim 7
Dependent Claim
30 words
A polyamide reinforcing element according to claim 5 where said copolymer is a blend of a terpolymer of butadiene-1,3, styrene and 2-vinyl pyridine and a copolymer of butadiene-1,3 and styrene.
Claim 8
Dependent Claim
60 words
A polyamide reinforcing element according to claim 5 where said rubbery vinyl pyridine copolymer is a copolymer of about 70% by weight of butadiene-1,3, 15% by weight of styrene, and 15% by weight of 2-vinyl pyridine and where the parts by weight ratio of said rubbery vinyl pyridine-copolymer to said heat reactable chlorophenolic composition is from about 100:35 to 100:50.
Claim 9
Dependent Claim
53 words
A polyamide reinforcing element according to claim 1 where said element is a cord of linear long chain synthetic aromatic poly(para phenylene terephthalamide) in which at least 85% of the amide linkages are attached directly to aromatic rings, which is highly crystalline, and which has a modulus (grams/denier) of at least about 350.
References Cited (Backward Citations)
US2902398A
Cited
US3063966A
Cited
US3111448A
Cited
US3247043A
Cited
US3423230A
Cited
US3660202A
Cited
US3861980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |