Patent US4623680A successfully refreshed from Google Patents.
US4623680A
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Aqueous epoxy resin dispersions for can coating use
Assignee: Valspar Corp
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Filing: 1985-06-03
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Granted: 1986-11-18
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Expires: 2005-06-03
Abstract
Abstract Aqueous dispersions useful as can coating compositions are made from the ammonia or amine salt of a carboxyl functional acrylic copolymer blended with phenolplast resins, polyepoxide resins partially reacted with a monofunctional acid and, optionally, an epoxidized hydrocarbon or vegetable oil.
Inventors
- 👤 Farah D. Azarnia
- 👤 Jimmy D. Elmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
159 words
A coating composition which comprises an aqueous dispersion of a resinous blend salted with ammonia or an amine wherein the resinous blend, before salting, consists essentially of (a) about 15 to about 30 weight percent of a carboxyl functional acrylic copolymer; (b) about 10 to about 25 weight percent of a phenolplast resin; (c) about 40 to about 75 weight percent of a partially defunctionalized polyepoxide resin; and (d) about 0 to about 5 weight percent of an epoxidized hydrocarbon or vegetable oil, wherein (a) has an average molecular weight of about 3,000 to about 30,000 and an acid value of about 100 to about 300, and wherein (c) is a diglycidyl ether of a dihydric phenol having an epoxide equivalent weight of about 750 to about 3,000 before defunctionalization having been reacted with about 0.02 to about 0.2 of equivalents per epoxide equivalent of a non-polymerizable monofunctional organic acid having a pKa of about 2.0 to about 5.
Claim 2
Dependent Claim
159 words
A coating composition which comprises an aqueous dispersion of a resinous blend salted with ammonia or an amine wherein the resinous blend, before salting, consists essentially of (a) about 15 to about 30 weight percent of a carboxyl functional acrylic copolymer; (b) about 10 to about 25 weight percent of a phenolplast resin; (c) about 40 to about 75 weight percent of a partially defunctionalized polyepoxide resin; and (d) about 0 to about 5 weight percent of an epoxidized hydrocarbon or vegetable oil, wherein (a) has an average molecular weight of about 3,000 to about 30,000 and an acid value of about 100 to about 300, and wherein (c) is a diglycidyl ether of a dihydric phenol having an epoxide equivalent weight of about 750 to about 3,000 before defunctionalization having been reacted with about 0.02 to about 0.2 of equivalents per epoxide equivalent of a non-polymerizable monofunctional organic acid having a pKa of about 2.0 to about 5.
Claim 3
Dependent Claim
36 words
The composition of claim 1 wherein the carboxyl functional acrylic copolymer is a copolymer of at least one polymerizable ethylenically unsaturated carboxylic acid monomer and at least one polymerizable ethylenically unsaturated monomer free of acid groups.
Claim 4
Dependent Claim
16 words
The composition of claim 2 wherein the polymerizable ethylenically unsaturated carboxylic acid monomer is acrylic acid.
Claim 5
Dependent Claim
20 words
The composition of claim 2 wherein the polymerizable ethylenically unsaturated monomer free of acid groups is styrene and ethyl acrylate.
Claim 6
Dependent Claim
32 words
The composition of claim 2 wherein the phenolplast resin has an average molecular weight of about 300 to about 2500 and a melting point of about 65° C. to about 100° C.
Claim 7
Dependent Claim
26 words
The composition of claim 5 wherein the phenolplast resin is a resin derived from phenols selected from the group consisting of phenol, cresol and 2,2'(4-hydroxyphenyl) propane.
Claim 8
Dependent Claim
20 words
The composition of claim 2 wherein the diglycidyl ether of the dihydric phenol is a diglycidyl ether of 2,2'(4-hydroxyphenyl) propane.
Claim 9
Dependent Claim
25 words
The composition of claim 2 wherein the non-polymerizable monofunctional organic acid having a pKa of about 2 to about 5 is dodecyl benzene sulfonic acid.
Claim 10
Dependent Claim
12 words
The composition of claim 1 wherein the epoxidized hydrocarbon is epoxidized polybutadiene.
Claim 11
Dependent Claim
14 words
The composition of claim 1 wherein the epoxidized vegetable oil is epoxidized soybean oil.
Claim 12
Dependent Claim
24 words
The composition of claim 1 which contains about 5 to about 25 weight percent, based on total solid content, of a zinc salt paste.
Claim 13
Dependent Claim
12 words
The composition of claim 11 wherein the zinc salt is zinc oxide.
Claim 14
Dependent Claim
15 words
The composition of claim 11 wherein part of the zinc salt is a zinc carboxylate.
References Cited (Backward Citations)
US3118848A
Cited
US3492252A
Cited
US3969300A
Cited
US4247439A
Cited
US4283428A
Cited
US4212781A
Cited
EP0006334B1
Cited
EP0006336B1
Cited
DE3006175A1
Cited
US4289811A
Cited
US4446260A
Cited
US4423165A
Cited
US4446258A
Cited
US4454265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |