Claims
- 1. A block copolymer, having the configuration ABA wherein the A blocks are individually selected from the group consisting of random copolymers of an N,N-disubstituted acrylamide with a member selected from the group consisting of styrene, vinyltoluene, tertiary-butylstyrene and mixtures thereof, and block copolymers of the configuration DE- wherein D is a block of poly N,N-disubstituted acrylamide and E is a block of a polymer of styrene, vinyltoluene, tertiary-butylstyrene or a mixture thereof, with the further limitation that the ratio of N,N-disubstituted acrylamide to a member selected from the group consisting of styrene, vinyltoluene, tertiary-butylstyrene and mixtures thereof in such random copolymers of block copolymers is from about 1:99 to 99:1; B is a block polymer of 1,3-butadiene, isoprene, or a mixture of 1,3-butadiene or isoprene and from 0-15 percent by weight based on the weight of the B block of a member selected from the group consisting of styrene, vinyltoluene, tertiary-butylstyrene and mixtures thereof, the ABA block copolymer having a molecular weight as determined by gel permeation chromatography from about 5000 grams per mole to 10.sup.6 grams per mole and the content of polymerized 1,3-butadiene or isoprene in the ABA block copolymer being 5-95 weight percent based on the total weight of the ABA block copolymer.
- 2. The block copolymer of claim 1 wherein the N,N-disubstituted acrylamide is N,N-dimethylacrylamide.
- 3. The block copolymer of claim 1 having a molecular weight from about 50,000 to about 500,000.
- 4. The block copolymer of claim 1 wherein the A block is a copolymer of styrene and an N,N-dialkylacrylamide.
- 5. The block copolymer of claim 1 wherein the block polymer contains from 50 to 95 weight percent of B block.
- 6. The block copolymer of claim 1 wherein the B block is a polymer of 1,3-butadiene.
- 7. The block copolymer of claim 1 wherein the A block is a polymer of N,N-dimethylacrylamide and the B block is a polymer of butadiene.
- 8. The block copolymer of claim 1 wherein the A block is a block copolymer of an N,N-disubstituted acrylamide and styrene.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 502,399, filed June 8, 1983, now abandoned, which is a continuation-in-part of the copending application Ser. No. 353,723, filed Mar. 1, 1982, abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3144429 |
Strobel |
Aug 1964 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
502399 |
Jun 1983 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
353723 |
Mar 1982 |
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