Patent US4151227A successfully refreshed from Google Patents.
US4151227A
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Acrylic graft copolymers and coating compositions thereof
Assignee: EIDP Inc
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Filing: 1977-08-01
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Granted: 1979-04-24
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Expires: 1997-08-01
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
2026-10-29 19:33
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; C09; C09D; C09D151/00; C09D151/02; C09D187/00; C09D187/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A graft copolymer consisting essentially of about 25-95% by weight of an acrylate polymer backbone and about 5-75% by weight of side chains; wherein the acrylic polymer backbone contains 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## 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 a polymer segment of an acrylate polymer.
Claim 2
Dependent Claim
94 words
A graft copolymer consisting essentially of about 25-95% by weight of an acrylate polymer backbone and about 5-75% by weight of side chains; wherein the acrylic polymer backbone contains 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## 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 a polymer segment of 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
33 words
The graft copolymer of claim 2 in which the backbone is of polymerized monomers selected from the group consisting of alkyl methacrylate, alkyl acrylate, hydroxy alkyl acrylate, hydroxy alkyl methacrylate and mixtures thereof.
Claim 5
Dependent Claim
31 words
The graft copolymer of claim 3 in which R 2 is of polymerized monomers selected from the group consisting of alkyl acrylate, hydroxy alkyl acrylates, hydroxy alkyl methacrylates and mixtures thereof.
Claim 6
Dependent Claim
47 words
The graft copolymer of claim 2 in which the backbone consists essentially of polymerized methyl methacrylate, 2-hydroxy ethyl methacrylate and R 2 consist essentially of polymerized butyl acrylate and hydroxy ethyl acrylate and in which R is cyclohexylene and R 1 is --CH 2 -- 2 .
Claim 7
Dependent Claim
52 words
The graft copolymer of claim 2 in which the backbone consists essentially of polymerized butyl acrylate and hydroxy ethyl acrylate and R 2 consist essentially of polymerized methyl methacrylate, butyl acrylate, hydroxy ethyl acrylate and acrylic acid and in which R is cyclohexylene and R 1 is --CH 2 -- 2 .
Claim 8
Dependent Claim
94 words
A process for preparing a graft copolymer of about 25-95% by weight of an acrylate polymer backbone and about 5-75% by weight of side chains which comprises the following steps: (a) contacting a mercapto organic isocyanate of the formula ##STR6## with an acrylic polymer having pendant hydroxy groups; wherein R is an aliphatic, cycloaliphatic or aromatic group; R 1 is an alkylene groups having 2-6 carbon atoms, and (b) adding acrylate monomers to the product resulting from step (a) and polymerizing said monomers with the product of step (a) to form the graft copolymer.
Claim 9
Dependent Claim
94 words
A process for preparing a graft copolymer of about 25-95% by weight of an acrylate polymer backbone and about 5-75% by weight of side chains which comprises the following steps: (a) contacting a mercapto organic isocyanate of the formula ##STR6## with an acrylic polymer having pendant hydroxy groups; wherein R is an aliphatic, cycloaliphatic or aromatic group; R 1 is an alkylene groups having 2-6 carbon atoms, and (b) adding acrylate monomers to the product resulting from step (a) and polymerizing said monomers with the product of step (a) to form the graft copolymer.
Claim 10
Dependent Claim
47 words
The process of claim 7 in which step (a) is carried out at about 80°-150° C. for about 0.5-6 hours in the presence of a catalyst and step (b) is carried out at about 60°-150° C. for about 1-6 hours in the presence of a polymerization catalyst.
References Cited (Backward Citations)
US3028367A
Cited
US4016332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |