Patent US3596697A successfully refreshed from Google Patents.
US3596697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends or rubbery polymers
Assignee: Millennium Petrochemicals Inc
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Filing: 1968-05-01
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Granted: 1971-08-03
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Expires: 1988-05-01
Abstract
Abstract Rubber polymers prepared by polymerizing conjugated diolefinic compounds alone or with other suitable monomers in the presence of an alfin catalyst and a molecular weight control agent are blended with styrene-butadiene rubber to provide novel compositions useful in tire tread formulations.
Inventors
- 👤 Virgil L Hansley
- 👤 Raymond G Newberg
- 👤 Fred K Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:10
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08K; C08K5/00; C08K5/01; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
A composition as defined in claim 1 wherein (a) is a homopolymer of a conjugated diolefin having 4-12 carbon atoms.
Claim 2
Dependent Claim
14 words
A composition as defined in claim 2 wherein (A) is a homopolymer of 1,3-butadiene.
Claim 3
Dependent Claim
24 words
A composition as defined in claim 1 wherein (A) has a Mooney viscosity (ML 1+4 212* F) of from about 30 to about 80.
Claim 4
Dependent Claim
25 words
A composition as defined in claim 1 wherein (A) is a copolymer of butadiene and isoprene containing at least 50 percent by weight of butadiene.
Claim 5
Dependent Claim
25 words
A composition as defined in claim 1 wherein (A) is a copolymer of butadiene and styrene containing at least 50 percent by weight of butadiene.
Claim 6
Dependent Claim
33 words
A composition as defined in claim 1 comprising, in addition to A & B, at least 30 parts up to about 150 parts per 100 parts of A of an oily liquid hydrocarbon.
Claim 7
Dependent Claim
117 words
A pneumatic tire having at least a tread portion which includes a vulcanized synthetic rubber composition comprising (A) a blend of an alfin-catalyzed rubbery polymer containing at least about 50 percent by weight of a conjugated diolefin having 4 to 12 carbon atoms and having a molecular weight of above about 200, 000 but less than about 2 million and at least 50 percent up to about 95 percent by weight based on the total weight of said blend of an emulsion polymerized styrene-butadiene rubber containing from 5 to 40 percent by weight of styrene and (B) from about 50 to 150 percent by weight based on the total weight of said rubber composition of carbon black.
Claim 8
Dependent Claim
21 words
A pneumatic tire as defined in claim 8 wherein (A) is a homopolymEr of a conjugated diolefin having 4-12 carbon atoms.
Claim 9
Dependent Claim
15 words
A pneumatic tire as defined in claim 9 wherein (A) is a homopolymer of 1,3-butadiene.
Claim 10
Dependent Claim
25 words
A pneumatic tire as defined in claim 8 wherein (A) has a Mooney viscosity (ML 1+4 212* F) of from about 30 to about 80.
Claim 11
Dependent Claim
26 words
A pneumatic tire as defined in claim 8 wherein (A) is a copolymer of butadiene and isoprene containing at least 50 percent by weight of butadiene.
Claim 12
Dependent Claim
26 words
A pneumatic tire as defined in claim 8 wherein (A) is a copolymer of butadiene and styrene containing at least 50 percent by weight of butadiene.
Claim 13
Dependent Claim
38 words
A pneumatic tire as defined in claim 10 wherein said rubber composition comprises, in addition to A & B, at least 30 parts up to about 150 parts per 100 parts of A of an oily liquid hydrocarbon.
Claim 14
Dependent Claim
18 words
A pneumatic tire as defined in claim 8 wherein said carbon black is high abrasion furnace carbon black.
Claim 15
Dependent Claim
19 words
A pneumatic tire as defined in claim 8 wherein said carbon black is intermediate super abrasion furnace carbon black.
References Cited (Backward Citations)
US3067187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |