US4130606A
Expired / Lapsed
US
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Rubber compositions
Assignee: Shell USA Inc
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Filing: 1977-03-28
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Granted: 1978-12-19
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Expires: 1997-03-28
Abstract
Abstract Rubbery compositions having good cold-flow and processing characteristics comprise a particular blend of polymers or copolymers of conjugated dienes having 4 or 5 carbon atoms per molecule, or copolymers thereof with a monoalkenyl arene.
Inventors
- 👤 Hendrik Van Ballegooijen
- 👤 Frederik L. Binsbergen
- 👤 Jacob Raadsen
- 👤 Arie D. Vreugdenhil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:25
CPC Classifications
C; C08; C08L; C08L9/00; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C08L9/06; Y; Y10; Y10S; Y10S525/00; Y10S525/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A rubbery composition having an intrinsic viscosity of between about 1.3 and 5.0 dl/g prepared by blending together components A and B wherein: (a) A comprises 40 to 94 percent by weight of the total rubbery composition and component B comprises 60 to 6 percent by weight; (b) the ratio of the intrinsic viscosity of component A to component B varies from 3.0 to 50.0; (c) component A is selected from the group consisting of styrene-butadiene copolymers, polybutadiene, polyisoprene, and mixtures thereof produced by solution polymerization employing an alkyl lithium initiation and a coupling agent wherein at least 60 percent by weight of the polymers and copolymers in the A component have a branched structure having at least 20 monomer units per branch, said branched structure having at least three arms; and (d) component B is selected from the group consisting of styrene-butadiene copolymers, polybutadiene, polyisoprene, and mixtures thereof.
Claim 2
Dependent Claim
149 words
A rubbery composition having an intrinsic viscosity of between about 1.3 and 5.0 dl/g prepared by blending together components A and B wherein: (a) A comprises 40 to 94 percent by weight of the total rubbery composition and component B comprises 60 to 6 percent by weight; (b) the ratio of the intrinsic viscosity of component A to component B varies from 3.0 to 50.0; (c) component A is selected from the group consisting of styrene-butadiene copolymers, polybutadiene, polyisoprene, and mixtures thereof produced by solution polymerization employing an alkyl lithium initiation and a coupling agent wherein at least 60 percent by weight of the polymers and copolymers in the A component have a branched structure having at least 20 monomer units per branch, said branched structure having at least three arms; and (d) component B is selected from the group consisting of styrene-butadiene copolymers, polybutadiene, polyisoprene, and mixtures thereof.
Claim 3
Dependent Claim
24 words
A composition according to claim 1 wherein at least 75 percent by weight of the polymers in the A component have a branched structure.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 wherein the A component has an intrinsic viscosity between about 1.3 and 10.0 dl/g.
Claim 5
Dependent Claim
17 words
A composition according to claim 1 wherein the B component comprises polymers having a predominantly linear structure.
Claim 6
Dependent Claim
20 words
A composition according to claim 1 wherein the B component has an intrinsic viscosity between about 0.1 and 2.0 dl/g.
Claim 7
Dependent Claim
24 words
A composition according to claim 1 wherein the ratio of the intrinsic viscosities of component A to component B varies from 4 to 20.
Claim 8
Dependent Claim
21 words
A composition according to claim 1 wherein the intrinsic viscosity of the rubbery composition is between about 1.8 and 3.0 dl/g.
Claim 9
Dependent Claim
17 words
A composition according to claim 1 wherein the A component and the B component are polybutadiene homopolymers.
Claim 10
Dependent Claim
23 words
A composition according to claim 1 wherein the A component is a styrene-butadiene random copolymer and the B component is a polybutadiene homopolymer.
Claim 11
Dependent Claim
24 words
A composition according to claim 1 wherein the ratio of the intrinsic viscosities of component A to component B varies from 6 to 12.
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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |