US4118375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinkable polyacrylonitrile copolymers
Assignee: Bayer AG
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Filing: 1977-06-08
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Granted: 1978-10-03
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Expires: 1997-06-08
Abstract
Abstract The invention relates to a copolymer comprising at least 40% by weight of copolymerized acrylonitrile, from 0.5 to 40% by weight of at least one copolymerized aceto acetate of a mono (meth) acrylate of an aliphatic diol containing from 2 to 8 carbon atoms and, optionally, at least one other copolymerized comonomer.
Inventors
- 👤 Christian Lindner
- 👤 Carlhans Suling
- 👤 Gunter Arend
- 👤 Dieter Brokmeier
- 👤 Gunther Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:36
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/28; C08F220/283; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
An addition copolymer, comprising (1) at least 40% by weight of acrylonitrile; (2) from 0.5 to 40% by weight of at least one acetoacetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 8 carbon atoms; and (3) 0-10% by weight of a acrylic acid or a methacrylic acid alkyl ester; 0-3% by weight of methallyl sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, or their alkali metal salts; or 0% or 10-30% by weight of vinyl chloride or vinylidene chloride.
Claim 2
Dependent Claim
86 words
An addition copolymer, comprising (1) at least 40% by weight of acrylonitrile; (2) from 0.5 to 40% by weight of at least one acetoacetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 8 carbon atoms; and (3) 0-10% by weight of a acrylic acid or a methacrylic acid alkyl ester; 0-3% by weight of methallyl sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, or their alkali metal salts; or 0% or 10-30% by weight of vinyl chloride or vinylidene chloride.
Claim 3
Dependent Claim
46 words
The copolymer of claim 1, wherein acrylonitrile comprises at least 80% by weight of the copolymer and the acetoacetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 8 carbon atoms comprises from 0.5 to 20% by weight of the copolymer.
Claim 4
Dependent Claim
16 words
The copolymer of claim 1, wherein the aliphatic diol contains from 2 to 4 carbon atoms.
Claim 5
Dependent Claim
99 words
A process for the production of an addition copolymer of acrylonitrile, which comprises copolymerizing a mixture of (1) at least 40% by weight of acrylonitrile; (2) from 0.5 to 40% by weight of at least one acetoacetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 8 carbon atoms; and (3) 0-10% by weight of a acrylic acid or a methacrylic acid alkyl ester; 0-3% by weight of methallyl sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, or their alkali metal salts; or 0% or 10-30% by weight of vinyl chloride or vinylidene chloride.
Claim 6
Dependent Claim
99 words
A process for the production of an addition copolymer of acrylonitrile, which comprises copolymerizing a mixture of (1) at least 40% by weight of acrylonitrile; (2) from 0.5 to 40% by weight of at least one acetoacetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 8 carbon atoms; and (3) 0-10% by weight of a acrylic acid or a methacrylic acid alkyl ester; 0-3% by weight of methallyl sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, or their alkali metal salts; or 0% or 10-30% by weight of vinyl chloride or vinylidene chloride.
Claim 7
Dependent Claim
45 words
The process of claim 4, wherein the mixture contains at least 80% by weight of acrylonitrile and 0.5 to 20% by weight of at least one acetyl acetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 8 carbon atoms.
Claim 8
Dependent Claim
30 words
The process of claim 4, wherein the mixture contains at least one acetoacetate of a monoacrylate or a monomethacrylate of an aliphatic diol containing from 2 to 4 carbon atoms.
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) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |