US4257934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexural modulus paintable rubber composition
Assignee: Goodyear Tire and Rubber Co
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Filing: 1979-11-07
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Granted: 1981-03-24
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Expires: 1999-11-07
Abstract
Abstract This invention provides a composition comprising a blend of EPDM, styrene-butadiene rubber and styrene-butadiene resins that has improved modulus in the vulcanizates by the incorporation into the composition of about 1 to 20 parts per 100 of a tackifying resin, the tackifying resin being one of those normally utilized to improve the tack of the rubber.
Inventors
- 👤 Joseph F. O'Mahoney, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:50
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L23/00; C08L23/02; C08L23/16; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L45/00; C08L45/02; C08L93/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A composition comprising a blend on a weight percent basis of 30 to 70 percent of an styrene-butadiene rubber, 30 to 70 percent of an EPDM rubber and 40 to 20 percent of a styrene-butadiene resin with about 1 to 20 parts per hundred of said blend of a tackifier resin having a melting point of about 100° to about 165° C.
Claim 2
Dependent Claim
62 words
A composition comprising a blend on a weight percent basis of 30 to 70 percent of an styrene-butadiene rubber, 30 to 70 percent of an EPDM rubber and 40 to 20 percent of a styrene-butadiene resin with about 1 to 20 parts per hundred of said blend of a tackifier resin having a melting point of about 100° to about 165° C.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said tackifier is a coumarone-indene resin.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein said tackifier resin is an alkyl aromatic hydrocarbon resin.
Claim 5
Dependent Claim
15 words
The composition of claim 1 wherein said tackifier resin is a phenolic modified terpene resin.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein said tackifier resin is a styrene-acrylic copolymer resin.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein said tackifier resin is an α-methyl styrene resin.
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein said tackifier is natural pine stump wood resin.
Claim 9
Dependent Claim
19 words
The composition of claim 1 wherein a filler comprises from 5 to 100 parts per 100 of the blend.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |