Patent US4107124A successfully refreshed from Google Patents.
US4107124A
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Block copolymer compositions
Assignee: Shell USA Inc
•
Filing: 1977-01-26
•
Granted: 1978-08-15
•
Expires: 1997-01-26
Abstract
Abstract Block copolymer compositions having improved adhesion to porous substrates are prepared by employing an anionic polyarene as a component instead of a free radical polymerized polyarene. Also disclosed is a process for simultaneously preparing the block copolymer and anionic polyarene.
Inventors
- 👤 Glenn R. Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:50
CPC Classifications
C; C08; C08L; C08L25/00; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022; C08L53/00; C08L53/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A polymeric composition comprising: ______________________________________
Parts
by Weight
______________________________________
(a) a block copolymer having at least two mono-
alkenyl arene polymer end blocks A and
at least one elastomeric conjugated diene mid
block B, each block A having an average
molecular weight between about 5,000 and
100
about 125,000 and each block B having an
average molecular weight between about
15,000 and about 250,000, said blocks
A comprising 8-65% by weight
of the copolymer;
(b) a polyarene produced by the anionic poly-
merization of a monoalkenyl arene;
20-90
(c) a hydrocarbon rubber extending oil; and
50-125
(d) a finely divided filler 0-250
______________________________________ wherein the ratio of the number average molecular weight of the polyarene divided by the number average molecular weight of the A block of the block copolymer is between about 0.6 and about 2.0 and the Q value of the polyarene is between about 1.0 and about 3.0.
Claim 2
Dependent Claim
151 words
A polymeric composition comprising: ______________________________________
Parts
by Weight
______________________________________
(a) a block copolymer having at least two mono-
alkenyl arene polymer end blocks A and
at least one elastomeric conjugated diene mid
block B, each block A having an average
molecular weight between about 5,000 and
100
about 125,000 and each block B having an
average molecular weight between about
15,000 and about 250,000, said blocks
A comprising 8-65% by weight
of the copolymer;
(b) a polyarene produced by the anionic poly-
merization of a monoalkenyl arene;
20-90
(c) a hydrocarbon rubber extending oil; and
50-125
(d) a finely divided filler 0-250
______________________________________ wherein the ratio of the number average molecular weight of the polyarene divided by the number average molecular weight of the A block of the block copolymer is between about 0.6 and about 2.0 and the Q value of the polyarene is between about 1.0 and about 3.0.
Claim 3
Dependent Claim
21 words
A composition according to claim 1 wherein said filler is selected from the group consisting of calcium carbonate, clay and silica.
Claim 4
Dependent Claim
48 words
A composition according to claim 1 wherein said block copolymer is selectively hydrogenated such that no more than about 25% of the aromatic double bonds of block A are reduced by hydrogenation while at least 75% of the aliphatic double bonds of block B are reduced by hydrogenation.
Claim 5
Dependent Claim
58 words
A composition according to claim 1 including between about 0 and about 150 parts by weight of a resin compatible with the monalkenyl arene end blocks, said resin being selected from the group consisting of polymers of alphamethyl styrene, copolymers of alphamethyl styrene and vinyltoluene, coumarone-indene resins, poly(indene) resins, poly-(methyl indene) resins and low molecular weight polystyrene resins.
Claim 6
Dependent Claim
22 words
A composition according to claim 1 wherein the block copolymer has a formula A-B(B-A) n where n varies from 1 to 15.
Claim 7
Dependent Claim
35 words
A composition according to claim 1 wherein said polyarene is formed by contacting a monoalkenyl arene with an organomonolithium initiator in a solution at a temperature of between about -60° F and about 300° F.
Claim 8
Dependent Claim
27 words
A composition according to claim 1 wherein said block A is a polystyrene block, said block B is a polybutadiene block and said polyarene is anionic polystyrene.
Claim 9
Dependent Claim
40 words
A composition according to claim 1 wherein the ratio of the number average molecular weight of the polyarene divided by the number average molecular weight of the A block of the block copolymer is between about 0.8 and about 1.5.
Claim 10
Dependent Claim
39 words
A composition according to claim 1 wherein the amount of polyarene varies from about 20 to about 90 parts by weight and the amount of hydrocarbon rubber extending oil varies from about 50 to about 125 parts by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |