Patent US4278575A successfully refreshed from Google Patents.
US4278575A
Expired / Lapsed
US
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Modified acrylic copolymer and coating composition comprising such copolymer
Assignee: DIC Corp
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Filing: 1978-10-26
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Granted: 1981-07-14
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Expires: 1998-10-26
Abstract
Abstract PCT No. PCT/JP78/00013 Sec. 371 Date June 28, 1979 Sec. 102(e) Date June 19, 1979 PCT Filed Oct. 26, 1978 PCT Pub. No. W079/00240 PCT Pub. Date May 3, 1979 It has previously been known that the poor pigment dispersibility of an acrylic paint is its defect. The present invention provides a modified acrylic copolymer having superior pigment dispersibility and being suitable as a vehicle for acrylic paints. The copolymer is obtained by polymerizing specified proportions of a polyester containing an unsaturated double bond, a dialkylaminoalkyl (meth)acrylate, methyl methacrylate and another polymerizable monomer, and has a weight average molecular weight/number average molecular weight ratio within the range of 3 to 20.
Inventors
- 👤 Hidehisa Nakamura
- 👤 Ryoichi Hori
- 👤 Emiko Isomoto
- 👤 Yoichi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:25
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/10; C09D133/12; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0478; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/48; C08G63/52; C08G63/54; C09D151/00; C09D151/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
A coating composition comprising a mixture of vehicle, solvent and a pigment, which vehicle is a modified acrylic copolymer having a weight average molecular weight/number average molecular weight ratio within the range of from 3 to 20, said copolymer being obtained by the polymerization of 1 to 40% by weight of a polyester containing an unsaturated double bond, 0.05 to 10% by weight of a dialkylaminoalkyl (meth)acrylate, 10 to 83.95% by weight of methyl methacrylate and 15 to 78.95% by weight of another polymerizable monomer.
Claim 2
Dependent Claim
85 words
A coating composition comprising a mixture of vehicle, solvent and a pigment, which vehicle is a modified acrylic copolymer having a weight average molecular weight/number average molecular weight ratio within the range of from 3 to 20, said copolymer being obtained by the polymerization of 1 to 40% by weight of a polyester containing an unsaturated double bond, 0.05 to 10% by weight of a dialkylaminoalkyl (meth)acrylate, 10 to 83.95% by weight of methyl methacrylate and 15 to 78.95% by weight of another polymerizable monomer.
Claim 3
Dependent Claim
40 words
The composition of claim 1 wherein the polyester containing an unsaturated double bond is a drying oil and/or semidrying oil alkyd resin having a number average molecular weight of 500 to 10,000 and an oil length of 30 to 80%.
Claim 4
Dependent Claim
57 words
The composition of claim 1 wherein the polyester containing an unsaturated double bond is an unsaturated oil-free alkyd resin having a hydroxyl equivalent of 300 to 600, said alkyd resin containing a residue derived from 0.5 to 5% by weight, based on the sum of the starting materials for the alkyd resin, of an unsaturated dicarboxylic acid.
Claim 5
Dependent Claim
22 words
The composition of claim 1, 2 or 3 wherein the dialkylaminoalkyl (meth)acrylate contains 1 to 8 carbon atoms in the alkyl moiety.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein the dialkylaminoalkyl (meth)acrylate is dimethylaminoethyl methacrylate or diethylaminoethyl methacrylate.
Claim 7
Dependent Claim
70 words
A modified acrylic copolymer having a weight average molecular weight/number average molecular weight ratio within the range of from 3 to 20, said copolymer being obtained by the polymerization of 1 to 40% by weight of a polyester containing an unsaturated double bond, 0.05 to 10% by weight of a dialkylaminoalkyl (meth)acrylate, 10 to 83.95% by weight of methyl methacrylate and 15 to 78.95% by weight of another polymerizable monomer.
Claim 8
Dependent Claim
70 words
A modified acrylic copolymer having a weight average molecular weight/number average molecular weight ratio within the range of from 3 to 20, said copolymer being obtained by the polymerization of 1 to 40% by weight of a polyester containing an unsaturated double bond, 0.05 to 10% by weight of a dialkylaminoalkyl (meth)acrylate, 10 to 83.95% by weight of methyl methacrylate and 15 to 78.95% by weight of another polymerizable monomer.
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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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |