US4304701A
Expired / Lapsed
US
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Aqueous acrylic polymer dispersions
Assignee: PPG Industries Inc
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Filing: 1979-06-01
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Granted: 1981-12-08
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Expires: 1999-06-01
Abstract
Abstract Ungelled, stable aqueous dispersions of acrylic polymers, containing carboxyl and epoxy functionality, and their method of preparation are disclosed. The dispersions are useful in water-based coating compositions. As long as the polymeric product remains dispersed in aqueous medium, stable, curable, one-package coating compositions result. However, when the dispersions are applied to a substrate as a film and the water evaporated, a curing reaction occurs as evidenced by the film becoming harder and more solvent resistant with the passage of time.
Inventors
- 👤 Suryya K. Das
- 👤 Charles M. Kania
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:01
CPC Classifications
C; C08; C08F; C08F246/00; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/26; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/32; C08F220/325
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
99 words
A stable, curable, aqueous dispersion of a polymeric product which is prepared by polymerizing in aqueous medium under free radical polymerization conditions: (1) a dispersed phase of a polymerizable alpha, beta-ethylenically unsaturated monomer component which includes 1 to 7 percent by weight of an epoxy group-containing monomer; the percentage by weight being based on total weight of monomers used in preparing the polymeric product, in the presence of (2) an at least partially base neutralized acid group-containing acrylic polymer dispersant; the molar ratio of acid used in preparing the acrylic polymer to epoxy group-containing monomer being at least 3/1.
Claim 2
Dependent Claim
99 words
A stable, curable, aqueous dispersion of a polymeric product which is prepared by polymerizing in aqueous medium under free radical polymerization conditions: (1) a dispersed phase of a polymerizable alpha, beta-ethylenically unsaturated monomer component which includes 1 to 7 percent by weight of an epoxy group-containing monomer; the percentage by weight being based on total weight of monomers used in preparing the polymeric product, in the presence of (2) an at least partially base neutralized acid group-containing acrylic polymer dispersant; the molar ratio of acid used in preparing the acrylic polymer to epoxy group-containing monomer being at least 3/1.
Claim 3
Dependent Claim
41 words
The dispersion of claim 1 in which the acrylic polymer dispersant is prepared from polymerizing a mixture of vinyl monomers which includes an alpha, beta-ethylenically unsaturated carboxylic acid selected from the class consisting of acrylic acid, methacrylic acid and mixtures thereof.
Claim 4
Dependent Claim
44 words
The dispersion of claim 2 in which the mixture of vinyl monomers further includes a member selected from the class consisting of styrene, a lower alkyl ester of methacrylic acid containing from 1 to 3 carbon atoms in the alkyl group and mixtures thereof.
Claim 5
Dependent Claim
17 words
The dispersion of claim 3 in which the lower alkyl ester of methacrylic acid is methyl methacrylate.
Claim 6
Dependent Claim
44 words
The dispersion of claim 1 in which the dispersed phase is a mixture of vinyl monomers which includes 2 to 50 percent by weight glycidyl acrylate or glycidyl methacrylate, and percentage by weight based on total weight of polymerizable monomers in the dispersed phase.
Claim 7
Dependent Claim
43 words
The dispersion of claim 5 in which the mixture of vinyl monomers further includes a member selected from the class consisting of styrene, lower alkyl ester of methacrylic acid containing from 1 to 3 carbon atoms in the alkyl group and mixtures thereof.
Claim 8
Dependent Claim
17 words
The dispersion of claim 6 in which the lower alkyl ester of methacrylic acid is methyl methacrylate.
Claim 9
Dependent Claim
12 words
The dispersion of claim 1 in which the base is an amine.
Claim 10
Dependent Claim
35 words
The dispersion of claim 1 in which the aqueous medium is present in amounts of about 20 to 90 percent by weight based on total weight of dispersed phase, acrylic polymer dispersant and aqueous medium.
Claim 11
Dependent Claim
35 words
The dispersion of claim 9 in which the aqueous medium contains an oxygenated organic solvent which is present in amounts less than about 20 percent by weight based on total weight of the aqueous medium.
Claim 12
Dependent Claim
31 words
The dispersion of claim 10 in which the organic solvent is a monoalkyl ether of ethylene glycol or diethylene glycol containing from 1 to 4 carbon atoms in the alkyl group.
Claim 13
Dependent Claim
31 words
The dispersion of claim 1 in which the polymerization is conducted in the presence of a free radical polymerization initiator which is soluble in the polymerizable alpha, beta-ethylenically unsaturated monomer component.
Claim 14
Dependent Claim
29 words
The dispersion of claim 1 in which the polymerization is conducted in the presence of a chain transfer agent which is soluble in the alpha, beta-ethylenically unsaturated monomer component.
Claim 15
Dependent Claim
25 words
The dispersion of claim 12 in which the free radical polymerization initiator is selected from the class consisting of peroxides, azo compounds and diazo compounds.
Claim 16
Dependent Claim
14 words
The dispersion of claim 13 in which the chain transfer agent is tertiary-dodecyl mercaptan.
Claim 17
Dependent Claim
109 words
A process for preparing ungelled, curable, polymeric products which comprises: (1) dispersing in aqueous medium, in the presence of an at least partially base neutralized acid group-containing acrylic polymer dispersant, an alpha, beta-ethylenically unsaturated monomer component which includes 1 to 7 percent by weight of an epoxy group-containing monomer; the percentage by weight being based on total weight of the monomers used in preparing the polymeric product; the molar ratio of acid used in preparing the acrylic polymer dispersant to epoxy group-containing monomer being at least 3/1; (2) subjecting said dispersion to free radical polymerization conditions to form the polymeric product dispersed in aqueous medium in a stable condition.
Claim 18
Dependent Claim
109 words
A process for preparing ungelled, curable, polymeric products which comprises: (1) dispersing in aqueous medium, in the presence of an at least partially base neutralized acid group-containing acrylic polymer dispersant, an alpha, beta-ethylenically unsaturated monomer component which includes 1 to 7 percent by weight of an epoxy group-containing monomer; the percentage by weight being based on total weight of the monomers used in preparing the polymeric product; the molar ratio of acid used in preparing the acrylic polymer dispersant to epoxy group-containing monomer being at least 3/1; (2) subjecting said dispersion to free radical polymerization conditions to form the polymeric product dispersed in aqueous medium in a stable condition.
Claim 19
Dependent Claim
41 words
The process of claim 16 in which the acrylic polymer dispersant is prepared from polymerizing a mixture of vinyl monomers which includes an alpha, beta-ethylenically unsaturated carboxylic acid selected from the class consisting of acrylic acid, methacrylic acid and mixtures thereof.
Claim 20
Dependent Claim
44 words
The process of claim 17 in which the mixture of vinyl monomers further includes a member selected from the class consisting of styrene, a lower alkyl ester of methacrylic acid containing from 1 to 3 carbon atoms in the alkyl group and mixtures thereof.
Claim 21
Dependent Claim
17 words
The process of claim 18 in which the lower alkyl ester of methacrylic acid is methyl methacrylate.
Claim 22
Dependent Claim
45 words
The process of claim 16 in which the dispersed phase is a mixture of vinyl monomers which includes 2 to 50 percent by weight glycidyl acrylate or glycidyl methacrylate, the percentage by weight being based on total weight of polymerizable monomers in the dispersed phase.
Claim 23
Dependent Claim
43 words
The process of claim 20 in which the mixture of vinyl monomers further includes a member selected from the class consisting of styrene, lower alkyl ester of methacrylic acid containing from 1 to 3 carbon atoms in the alkyl group and mixtures thereof.
Claim 24
Dependent Claim
17 words
The process of claim 21 in which the lower alkyl ester of methacrylic acid is methyl methacrylate.
Claim 25
Dependent Claim
12 words
The process of claim 16 in which the base is an amine.
Claim 26
Dependent Claim
35 words
The process of claim 16 in which the aqueous medium is present in amounts of about 20 to 90 percent by weight based on total weight of dispersed phase, acrylic polymer dispersant and aqueous medium.
Claim 27
Dependent Claim
35 words
The process of claim 24 in which the aqueous medium contains an oxygenated organic solvent which is present in amounts less than about 20 percent by weight based on total weight of the aqueous medium.
Claim 28
Dependent Claim
31 words
The process of claim 25 in which the organic solvent is a monoalkyl ether of ethylene glycol or diethylene glycol containing from 1 to 4 carbon atoms in the alkyl group.
Claim 29
Dependent Claim
31 words
The process of claim 16 in which the polymerization is conducted in the presence of a free radical polymerization initiator which is soluble in the polymerizable alpha, beta-ethylenically unsaturated monomer component.
Claim 30
Dependent Claim
29 words
The process of claim 16 in which the polymerization is conducted in the presence of a chain transfer agent which is soluble in the alpha, beta-ethylenically unsaturated monomer component.
Claim 31
Dependent Claim
25 words
The process of claim 27 in which the free radical polymerization initiator is selected from the class consisting of peroxides, azo compounds and diazo compounds.
Claim 32
Dependent Claim
14 words
The process of claim 28 in which the chain transfer agent is tertiary-dodecyl mercaptan.
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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) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |