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Patent US4379874A successfully refreshed from Google Patents.
US4379874A
Expired / Lapsed
US
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Polymer composition comprising polyacrylonitrile polymer and multi-block copolymer
Assignee: SKY POLYMERS PL A OF LP
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Filing: 1980-07-07
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Granted: 1983-04-12
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Expires: 2000-07-07
Abstract
Abstract There is disclosed a process for producing a novel polymer composition comprised of a polyacrylonitrile polymer and a block copolymer with acrylonitrile and non-crystalline polymer sequences wherein the polymer composition is formed by the removal of a solvent from a solution of a polyacrylonitrile polymer and a block copolymer with acrylonitrile and non-crystalline polymer sequences.
Inventors
- 👤 Vladimir A. Stoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:35
CPC Classifications
C; C08; C08F; C08F293/00; C08F8/00; C08L; C08L33/00; C08L33/18; C08L33/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A novel polymer composition comprised of polyacrylonitrile polymer and a multiblock copolymer with acrylonitrile and non-crystalline polymer sequences with an average number of said sequences per multiblock copolymer being equal and at least 2, said acrylonitrile sequence having a mean molecular weight of at least 500, said non-crystalline polymer sequence being comprised of at least about 10 units and constituting one or more highly polar units selected from the group consisting of acrylamide, N-substituted acrylamide, acrylic acid, esters of acrylic acid, salts of acrylic acid, hydrazides of acrylic acid and glutarimide.
Claim 2
Dependent Claim
91 words
A novel polymer composition comprised of polyacrylonitrile polymer and a multiblock copolymer with acrylonitrile and non-crystalline polymer sequences with an average number of said sequences per multiblock copolymer being equal and at least 2, said acrylonitrile sequence having a mean molecular weight of at least 500, said non-crystalline polymer sequence being comprised of at least about 10 units and constituting one or more highly polar units selected from the group consisting of acrylamide, N-substituted acrylamide, acrylic acid, esters of acrylic acid, salts of acrylic acid, hydrazides of acrylic acid and glutarimide.
Claim 3
Dependent Claim
35 words
The polymer composition as defined in claim 1 wherein said polyacrylonitrile polymer comprises of from 50 to 99 percent by weight of said polymer composition and has a molecular weight of from 30,000 to 1,500,000.
Claim 4
Dependent Claim
34 words
The polymer composition as defined in claim 2 wherein said polyacrylonitrile preferably comprises of from 50 to 95 percent by weight of said polymer composition and said molecular weight is from 50,000 to 1,000,000.
Claim 5
Dependent Claim
40 words
The polymer composition as defined in claim 2 or 3 wherein said non-crystalline polymer sequence comprises from 0.2 to 15 percent by weight of said polymer composition and said block copolymer has a molecular weight of from 3,000 to 1,500,000.
Claim 6
Dependent Claim
33 words
The polymer composition is defined in claim 4 wherein said non-crystalline polymer sequence comprises of from 1 to 10 percent by weight and has a molecular weight of from 10,000 to about 500,000.
Claim 7
Dependent Claim
35 words
The polymer composition as defined in claim 1 wherein said polyacrylonitrile polymer comprises 0.5 to 40 percent by weight and said non-crystalline polymer sequence comprises 40 to 99 percent by weight of said polymer composition.
Claim 8
Dependent Claim
36 words
The polymer composition as defined in claim 6 wherein said polyacrylonitrile polymer preferably comprises 1 to 25 percent by weight and said non-crystalline polymer sequence comprises 50 to 90 percent by weight of said polymer composition.
Claim 9
Dependent Claim
35 words
The polymer composition as defined in claim 6 wherein said polyacrylonitrile polymer has a molecular weight of from 30,000 to 1,500,000 and said multiblock copolymer has a molecular weight of from 10,000 to about 500,000.
Claim 10
Dependent Claim
30 words
The polymer composition as defined in claim 1 and including 0.5 to 90 weight percent of a material selected from the group consisting of water, glycerol, alkyene, glycol and sugar.
Claim 11
Dependent Claim
23 words
The polymer composition as defined in claim 9 wherein said material is present in an amount of from 2 to 55 weight percent.
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) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |