US4098740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous acrylic-carboxylated polyether compositions
Assignee: PPG Industries Inc
•
Filing: 1975-11-20
•
Granted: 1978-07-04
•
Expires: 1995-11-20
Abstract
Abstract An aqueous composition useful for forming primer coatings for adhering high molecular weight emulsion polymerized acrylic polymers to metallic substrates is disclosed. The aqueous dispersion comprises a mixture of: (A) a high molecular weight water-insoluble acrylic latex; (B) a carboxylated polyether formed from reacting and then hydrolyzing (1) a polyepoxide having an epoxide equivalency greater than 1, (2) a compound containing at least one phenolic hydroxyl group and containing at least one group hydrolyzable to a carboxyl group.
Inventors
- 👤 David R. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:18
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/625; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C08L63/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
157 words
An aqueous composition comprising a mixture of: (A) 20 to 80 percent by weight of a water-borne acrylic polymer latex in which the acrylic polymer has a molecular weight of at least 250,000 on a weight average basis and which is composed of 35 to 100 percent by weight of esters of organic acids having terminal methylene groups, 0 to 10 percent by weight of unsaturated carboxylic acids and 0 to 60 percent by weight of a copolymerizable monomer containing a CH 2 ═C<group in the terminal position other than the acids and esters mentioned above, the percentages by weight being based on total weight of the monomer charge, (B) 20 to 80 percent by weight of a carboxylated polyether formed from reacting and then hydrolyzing (1) a polyepoxide having an epoxide equivalency greater than 1.0, (2) a compound containing at least one phenolic hydroxyl group and containing at least one group hydrolyzable to a carboxyl group.
Claim 2
Dependent Claim
157 words
An aqueous composition comprising a mixture of: (A) 20 to 80 percent by weight of a water-borne acrylic polymer latex in which the acrylic polymer has a molecular weight of at least 250,000 on a weight average basis and which is composed of 35 to 100 percent by weight of esters of organic acids having terminal methylene groups, 0 to 10 percent by weight of unsaturated carboxylic acids and 0 to 60 percent by weight of a copolymerizable monomer containing a CH 2 ═C<group in the terminal position other than the acids and esters mentioned above, the percentages by weight being based on total weight of the monomer charge, (B) 20 to 80 percent by weight of a carboxylated polyether formed from reacting and then hydrolyzing (1) a polyepoxide having an epoxide equivalency greater than 1.0, (2) a compound containing at least one phenolic hydroxyl group and containing at least one group hydrolyzable to a carboxyl group.
Claim 3
Dependent Claim
15 words
The composition of claim 1 which contains from about 30 to 40 percent resin solids.
Claim 4
Dependent Claim
8 words
The composition of claim 1 which contains pigment.
Claim 5
Dependent Claim
27 words
The composition of claim 1 in which the acrylic polymer is in latex form and has a micell particle size of about 0.1 to 1.0 microns. pg,35
Claim 6
Dependent Claim
16 words
The composition of claim 1 in which the polyepoxide is a polyglycidyl ether of a polyphenol.
Claim 7
Dependent Claim
69 words
The composition of claim 1 wherein (2) is of the general formula: (HO).sub.n -- R -- (W).sub.m where n and m are integers of at least 1, R is an organic radical containing at least one aryl group, wherein at least one of the hydroxyl groups is attached to at least one of the aryl groups of R and wherein W is a group hydrolyzable to a carboxyl group.
Claim 8
Dependent Claim
56 words
The composition of claim 6 wherein W is selected from the group consisting of --COOR', --CON(R") 2 and --CN, wherein R' is a lower alkyl group containing from 1 to 5 carbon atoms and wherein R" is selected from the group consisting of hydrogen, lower alkyl containing from 1 to 4 carbon atoms and mixtures thereof.
Claim 9
Dependent Claim
14 words
The composition of claim 1 wherein (2) is an alkyl ester of hydroxybenzoic acid.
Claim 10
Dependent Claim
15 words
The composition of claim 8 wherein the alkyl ester of hydroxybenzoic acid is methyl p-hydroxybenzoate.
Claim 11
Dependent Claim
14 words
The composition of claim 8 wherein (2) is an alkyl ester of 4,4-bis(p-hydroxyphenyl)pentanoic acid.
Claim 12
Dependent Claim
25 words
The composition of claim 1 wherein the equivalent ratio of epoxy groups in the polyepoxide to hydroxyl groups in (2) is between 1.0:0.2 to 1.3.
Claim 13
Dependent Claim
26 words
The composition of claim 1 wherein (B) is hydrolyzed with a member selected from the group consisting of metal hydroxides, ammonia, amines and quaternary ammonium compounds.
References Cited (Backward Citations)
US3960795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |