US4407990A
Expired / Lapsed
US
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Acrylic coating compositions
Assignee: Orica Ltd
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Filing: 1982-02-11
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Granted: 1983-10-04
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Expires: 2002-02-11
Abstract
Abstract An acrylic coating composition suitable for use as an automotive refinish lacquer comprises a mixture of (a) a solution in volatile organic solvent of an acrylic copolymer of 75-90% methyl methacrylate, 1.5-6.0% dimethylaminoethyl methacrylate and 8-23.5% of butyl acrylate, butyl methacrylate or lauryl methacrylate, the copolymer having a Tg of 80 DEG -95 DEG C.; (b) a solution in volatile organic solvent of cellulose acetate butyrate, the cellulose acetate butyrate having a viscosity of 0.5-5 sec and a hydroxyl value of 2 maximum; and (c) a monomeric ester plasticizer such that the non-volatile constituents of (a), (b) and (c) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (a) plus (b) plus (c).
Inventors
- 👤 Derrard M. Hall
- 👤 Roy A. Kemp
- 👤 Christopher H. Such
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:15
CPC Classifications
C; C09; C09D; C09D4/00; C09D4/06; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
A liquid coating composition comprising a mixture of (a) a solution in volatile organic liquid of a copolymer of from 75-90% methyl methacrylate, 1.5-4.0% dimethyl aminoethyl methacrylate and 8-23.5% of monomer selected from butyl methacrylate, butyl acrylate and lauryl methacrylate, which copolymer shall have a glass transition temperature of 80°-95° C.; (b) a solution in volatile organic liquid of cellulose acetate butyrate which has a viscosity of 0.5-5.0 sec when measured according to Test Method D1343 of the American Society for Testing and Materials, and a hydroxyl value of 2 maximum; and (c) a monomeric ester plasticiser compatible with the selected mixture of the said components (a) plus (b) such that the non-volatile constituents of (a), (b) and (c) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (a) plus (b) plus (c).
Claim 2
Dependent Claim
138 words
A liquid coating composition comprising a mixture of (a) a solution in volatile organic liquid of a copolymer of from 75-90% methyl methacrylate, 1.5-4.0% dimethyl aminoethyl methacrylate and 8-23.5% of monomer selected from butyl methacrylate, butyl acrylate and lauryl methacrylate, which copolymer shall have a glass transition temperature of 80°-95° C.; (b) a solution in volatile organic liquid of cellulose acetate butyrate which has a viscosity of 0.5-5.0 sec when measured according to Test Method D1343 of the American Society for Testing and Materials, and a hydroxyl value of 2 maximum; and (c) a monomeric ester plasticiser compatible with the selected mixture of the said components (a) plus (b) such that the non-volatile constituents of (a), (b) and (c) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (a) plus (b) plus (c).
Claim 3
Dependent Claim
39 words
A liquid coating composition according to claim 1 wherein the copolymer (a) comprises 75-80% methyl methacrylate, 2.5-3.5% dimethylaminoethyl methacrylate and 1.5-2.5% butyl methacrylate; and the monomeric ester plasticiser (c) is selected from butyl benzyl phthalate and dipropylene glycol dibenzoate.
Claim 4
Dependent Claim
140 words
A process of preparing a liquid coating composition by blending (d) a solution in volatile liquid solvent of a copolymer of from 75-90% methyl methacrylate, 1.5-4.0% dimethyl aminoethyl methacrylate and 8-23.5% of monomer selected from butyl methacrylate, butyl acrylate and lauryl methacrylate, which copolymer shall have a glass transition temperature of 80°-95° C.; (e) a solution in volatile liquid solvent of cellulose acetate butyrate which has a viscosity of 0.5-5.0 sec when measured according to Test Method D1343 of the American Society for Testing and Materials, and a hydroxyl value of 2 maximum; and (f) a monomeric ester plasticiser compatible with the selected mixture of the said components (d) plus (e) such that the non-volatile constituents of (d), (e) and (f) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (d) plus (e) plus (f).
Claim 5
Dependent Claim
140 words
A process of preparing a liquid coating composition by blending (d) a solution in volatile liquid solvent of a copolymer of from 75-90% methyl methacrylate, 1.5-4.0% dimethyl aminoethyl methacrylate and 8-23.5% of monomer selected from butyl methacrylate, butyl acrylate and lauryl methacrylate, which copolymer shall have a glass transition temperature of 80°-95° C.; (e) a solution in volatile liquid solvent of cellulose acetate butyrate which has a viscosity of 0.5-5.0 sec when measured according to Test Method D1343 of the American Society for Testing and Materials, and a hydroxyl value of 2 maximum; and (f) a monomeric ester plasticiser compatible with the selected mixture of the said components (d) plus (e) such that the non-volatile constituents of (d), (e) and (f) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (d) plus (e) plus (f).
Claim 6
Dependent Claim
37 words
A process according to claim 3 wherein (d) the copolymer comprises 75-80% methyl methacrylate, 2.5-3.5% dimethylaminoethyl methacrylate and 1.5-20% butyl methacrylate; and (f) the monomeric ester plasticiser is selected from butyl benzyl phthalate and dipropylene glycol dibenzoate.
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |