US4255541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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
2026-11-04 20:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6888; C08F; C08F299/00; C08F299/02; C08F299/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
A graft copolymer consisting essentially of about 25-95% by weight of a polyester backbone consisting essentially of a polyol and an organic dicarboxylic acid and about 5-75% by weight of side chains; wherein the polyester backbone contains pendant 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## 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 , which forms a side chain, is an acrylate polymer.
Claim 2
Dependent Claim
98 words
A graft copolymer consisting essentially of about 25-95% by weight of a polyester backbone consisting essentially of a polyol and an organic dicarboxylic acid and about 5-75% by weight of side chains; wherein the polyester backbone contains pendant 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## 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 , which forms a side chain, is an acrylate polymer.
Claim 3
Dependent Claim
22 words
The graft copolymer of claim 1 having a weight average molecular weight of about 5,000 to 1,000,000 determined by gel permeation chromatography.
Claim 4
Dependent Claim
38 words
The graft copolymer of claim 2 in which the acrylate side chain is selected from the group consisting of polymerized alkyl methacrylate, alkyl acrylate, hydroxy alkyl acrylate, hydroxy alkyl methacrylate, an ethylenically unsaturated monocarboxylic acid and mixtures thereof.
Claim 5
Dependent Claim
51 words
The graft copolymer of claim 3 in which the backbone is a polyester of neopentyl glycol, trimethylol propane and azelaic acid, and R 2 , is polymerized methyl methacrylate, butyl acrylate, hydroxy ethyl acrylate and acrylic acid and in which R cyclohexylene 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 |