Patent US4138393A successfully refreshed from Google Patents.
US4138393A
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Crosslinkable acrylonitrile copolymers
Assignee: Bayer AG
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Filing: 1977-06-08
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Granted: 1979-02-06
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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 and from 0.5 to 10% by weight of at least one copolymerized unsaturated ester of acetoacetic acid corresponding to the general formula: CH.sub.3 --CO--CH.sub.2 --COO--R--CR'═CH.sub.2 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
2026-10-29 18:29
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08F220/42; C08F220/44; C08F222/00; C08F222/10; C08F222/12; C08F222/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A copolymer prepared by free radical polymerization comprising at least 40% by weight of copolymerised acrylonitrile and from 0.5 to 10% by weight of at least one copolymerised unsaturated ester of acetoacetic acid corresponding to the general formula: CH.sub.3 --CO--CH.sub.2 --COO--R--CR'═CH.sub.2, in which R represents an alkylene radical with from 1 to 4 carbon atoms, and R' represents a hydrogen atom, an alkyl radical with 1 or 2 carbon atoms or the radical CH.sub.3 --CO--CH.sub.2 --COO--CH.sub.2 ; 0-10% by weight of at least one comonomer selected from the group consisting of acrylic acid and methacrylic acid alkyl ester; and 0-3% by weight of methallyl sulfonic, vinyl sulfonic acid, or styrene sulfonic acid.
Claim 2
Dependent Claim
112 words
A copolymer prepared by free radical polymerization comprising at least 40% by weight of copolymerised acrylonitrile and from 0.5 to 10% by weight of at least one copolymerised unsaturated ester of acetoacetic acid corresponding to the general formula: CH.sub.3 --CO--CH.sub.2 --COO--R--CR'═CH.sub.2, in which R represents an alkylene radical with from 1 to 4 carbon atoms, and R' represents a hydrogen atom, an alkyl radical with 1 or 2 carbon atoms or the radical CH.sub.3 --CO--CH.sub.2 --COO--CH.sub.2 ; 0-10% by weight of at least one comonomer selected from the group consisting of acrylic acid and methacrylic acid alkyl ester; and 0-3% by weight of methallyl sulfonic, vinyl sulfonic acid, or styrene sulfonic acid.
Claim 3
Dependent Claim
19 words
The copolymer of claim 1, wherein said copolymerised unsaturated ester of acetoacetic acid corresponds to the general formula: ##STR1##
Claim 4
Dependent Claim
127 words
A process for the production by free radical polymerization of a copolymer of acrylonitrile and one or more other comonomers, which comprises copolymerising at least 40% by weight of acrylonitrile with from 0.5 to 10% by weight of at least one copolymerisable unsaturated ester of acetoacetic acid corresponding to the general formula: CH.sub.3 --COCH.sub.2 --COOR--CR'═CH.sub.2, in which R represents an alkylene radical with from 1 to 4 carbon atoms, and R' represents a hydrogen atom, an alkyl radical with 1 or 2 carbon atoms or the radical CH.sub.3 --CO--CH.sub.2 --COO--CH.sub.2 --; 0-10% by weight of at least one comonomer selected from the group consisting of acrylic acid and methacrylic acid alkyl ester; and 0-3% by weight of methallyl sulfonic acid, vinyl sulfonic acid, or styrene sulfonic acid.
Claim 5
Dependent Claim
127 words
A process for the production by free radical polymerization of a copolymer of acrylonitrile and one or more other comonomers, which comprises copolymerising at least 40% by weight of acrylonitrile with from 0.5 to 10% by weight of at least one copolymerisable unsaturated ester of acetoacetic acid corresponding to the general formula: CH.sub.3 --COCH.sub.2 --COOR--CR'═CH.sub.2, in which R represents an alkylene radical with from 1 to 4 carbon atoms, and R' represents a hydrogen atom, an alkyl radical with 1 or 2 carbon atoms or the radical CH.sub.3 --CO--CH.sub.2 --COO--CH.sub.2 --; 0-10% by weight of at least one comonomer selected from the group consisting of acrylic acid and methacrylic acid alkyl ester; and 0-3% by weight of methallyl sulfonic acid, vinyl sulfonic acid, or styrene sulfonic acid.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |