US4548963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally crosslinkable acrylic polymers and diglycidyl esters of dibasic acids
Assignee: EIDP Inc
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Filing: 1984-08-03
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Granted: 1985-10-22
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Expires: 2004-08-03
Abstract
Abstract Acrylic polymers prepared from hydroxy alkyl esters of acrylic or methacrylic acid, glycidic monomer and ethylenically unsaturated monomer, as well as enamels based on mixtures of such polymers and diglycidyl esters of dibasic acids.
Inventors
- 👤 Stephen L. Cluff
- 👤 Clifford H. Strolle
- 👤 Robert D. Breazeale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:08
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/068; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
An enamel composition comprising a. about from 35 to 75% by weight solids made up of (1) about from 80 to 50% by weight polymer prepared from a monomer blend comprising A. about from 10 to 40 weight percent of a hydroxy alkyl ester of acrylic or methacrylic acid wherein the alkyl group has from 2-10 carbon atoms, B. about from 10 to 40% of at least one glycidic monomer selected from the group consisting of glycidyl acrylate, glycidyl methacrylate and allyl glycidyl ether, and C. about from 20 to 80% by weight of at least one ethylenically unsaturated monomer polymerizable with the hydroxyl alkyl ester and the glycidic monomer, and (2) about from 20 to 50% by weight diglycidyl ester of an aliphatic or alicyclic dibasic acid having from 2 to 12 carbon atoms, b. about from 60 to 20% by weight of solvent, and c. about from 0.1 to 5.0% by weight crosslinking catalyst, and wherein the resulting polymer has a hydroxyl content of about from 2 to 6% by weight, and the ratio of epoxy to hydroxy units is at least about 0.5:1.
Claim 2
Dependent Claim
186 words
An enamel composition comprising a. about from 35 to 75% by weight solids made up of (1) about from 80 to 50% by weight polymer prepared from a monomer blend comprising A. about from 10 to 40 weight percent of a hydroxy alkyl ester of acrylic or methacrylic acid wherein the alkyl group has from 2-10 carbon atoms, B. about from 10 to 40% of at least one glycidic monomer selected from the group consisting of glycidyl acrylate, glycidyl methacrylate and allyl glycidyl ether, and C. about from 20 to 80% by weight of at least one ethylenically unsaturated monomer polymerizable with the hydroxyl alkyl ester and the glycidic monomer, and (2) about from 20 to 50% by weight diglycidyl ester of an aliphatic or alicyclic dibasic acid having from 2 to 12 carbon atoms, b. about from 60 to 20% by weight of solvent, and c. about from 0.1 to 5.0% by weight crosslinking catalyst, and wherein the resulting polymer has a hydroxyl content of about from 2 to 6% by weight, and the ratio of epoxy to hydroxy units is at least about 0.5:1.
Claim 3
Dependent Claim
11 words
An enamel of claim 1 wherein the diglycidyl ester is ##STR2##
Claim 4
Dependent Claim
13 words
An enamel of claim 1 wherein the crosslinking catalyst is a non-basic catalyst.
Claim 5
Dependent Claim
17 words
An enamel of claim 3 wherein the catalyst is a quaternary salt of a volatile organic acid.
Claim 6
Dependent Claim
25 words
An enamel of claim 1 further comprising colorant in an amount to provide a ratio of colorant to polymer of about from 0.2:1 to 100:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |