US4255298A
Expired / Lapsed
US
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Acrylic graft copolymers and coating compositions thereof
Assignee: EIDP Inc
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Filing: 1979-10-19
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Granted: 1981-03-10
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Expires: 1999-10-19
Abstract
Abstract A graft copolymer having a polymeric backbone with pendent hydroxyl groups; wherein the hydrogen atom of at least the one the hydroxyl groups is replaced by the formula ##STR1## where R is an aliphatic group, a cycloaliphatic group or an aromatic group; R 1 is an alkylene group having 2-6 carbon atoms; R 2 is a polymer segment of a vinyl addition polymer, such as butyl acrylate/hydroxyethyl acrylate; coating compositions of this copolymer can be cross-linked with conventional cross-linking agents such as an alkylated melamine formaldehyde resin or an organic polyisocyanate and coating compositions useful for flexible elastomeric substrates can be prepared from this copolymer.
Inventors
- 👤 John A. Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:30
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08F251/00; C08F251/02; C08F291/00; C08F291/14; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8054; C08G81/00; C08G81/02; C08G81/021; C08G81/024; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/14; C09; C09D; C09D151/00; C09D151/02; C09D187/00; C09D187/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A graft copolymer consisting essentially of about 25-95%, by weight of a cellulosic polymer and about 5-75% by weight of side chains; wherein the cellulosic polymer backbone contained pendent hydroxyl groups before the attachment of side chains by replacement of a hydrogen of at least one of the hydroxyl groups by the formula ##STR5## wherein R is an aliphatic group, a cycloaliphatic group or an aromatic group; R 1 is an alkylene group having 2-6 carbon atoms, R 2 , which forms a side chain, is an acrylate polymer.
Claim 2
Dependent Claim
89 words
A graft copolymer consisting essentially of about 25-95%, by weight of a cellulosic polymer and about 5-75% by weight of side chains; wherein the cellulosic polymer backbone contained pendent hydroxyl groups before the attachment of side chains by replacement of a hydrogen of at least one of the hydroxyl groups by the formula ##STR5## wherein R is an aliphatic group, a cycloaliphatic group or an aromatic group; R 1 is an alkylene group having 2-6 carbon atoms, R 2 , which forms a side chain, is an acrylate polymer.
Claim 3
Dependent Claim
22 words
The graft copolymer of claim 1 havng a weight average molecular weight of about 5,000 to 1,000,000 determined by gel permeation chromatography.
Claim 4
Dependent Claim
32 words
The graft copolymer of claim 2 in which the acrylate side chain is selected from the group consisting of alkyl methacrylate, alkyl acrylate, hydroxy alkyl acrylate, hydroxy alkyl methacrylate or mixtures thereof.
Claim 5
Dependent Claim
14 words
The graft copolymer of claim 3 in which the backbone is cellulose acetate butyrate.
Claim 6
Dependent Claim
33 words
The graft copolymer of claim 3 in which the backbone is cellulose acetate butyrate and R 2 is polymerized methyl methacrylate and butyl acrylate and R 1 is --(CH 2 )-- 2 .
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |