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US3853803A
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Method of preparing a cationic acrylic electrodepositable interpolymer
Assignee: PPG Industries Inc
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Filing: 1973-04-02
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Granted: 1974-12-10
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Expires: 1993-04-02
Abstract
Abstract Cationic electrodepositable, non-gelled, carboxy-containing, thermosetting acrylic interpolymers can be prepared by interpolymerizing the following monomers: (a) from about 40 to about 94 percent by weight of an alkyl ester of acrylic or methacrylic acid; (b) from about 5 to about 25 percent by weight of an alpha, beta-ethylenically unsaturated amino-alkyl monomer, wherein said amino group is selected from a member of the class consisting of a secondary amine and a tertiary amine; (c) from about 1 to about 15 percent of a monoethylenically-unsaturated carboxylic acid; and (d) from 0 to about 30 percent by weight of a copolymerizable ethylenically-unsaturated monomer, where the interpolymerization is carried out in the presence of an acidsolubilizing agent, where the acid has an ionization constant greater than that of the unsaturated carboxylic acid and is present in an amount sufficient to solubilize the interpolymer. The interpolymers herein can readily be admixed with a crosslinking agent to provide compositions that will electrodeposit at the cathode to produce films which, upon curing, have desirable properties, e.g., excellent corrosion-resistance
Inventors
- 👤 C Anderson
- 👤 L Sturni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:18
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C09; C09D; C09D5/00; C09D5/44; C09D5/4407; C09D5/4411; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
170 words
A METHOD OF PREPARING A CATIONIC ELECTRODEPOSITABLE, NON-GELLED, CARBOXYL-CONTAINING, THERMOSETTING ACRYLIC INTERPOLYMER COMPRISING INTERPOLYMERIZING THE FOLLOWING MONOMERS: A. FROM ABOUT 40 TO ABOUT 94 PERCENT BY WEIGHT OF AN ALKYL ESTER OF ACRYLIC OR METHACRYLIC ACID; B. FROM ABOUT 5 TO ABOUT 25 PERCENT BY WEIGHT OF AN ALPHA, BETAETHYLENICALLY UNSATURATED AMINO-ALKYL MONOMER, WHEREIN SAID AMINO GROUP IS SELECTED FROM THE CLASS CONSISTING OF A SECONDARY AMINE AND A TERTIARY AMINE; C. FROM ABOUT 1 TO ABOUT 15 PERCENT OF A MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACID; AND D. FROM 0 TO ABOUT 30 PERCENT BY WEIGHT OF A COPOLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER, WHEREIN SAID PERCENTS BY WEIGHT ARE BASED ON THE SOLIDS CONTENT OF THE INTERPOLYMER, AND WHEREIN THE INTERPOLYMERIZATION IS CARRIED OUT IN THE PRESENCE OF AN ACID SOLUBILIZING AGENT, WHEREIN SAID ACID HAS AN IONIZATION CONSTANT GREATER THAN THE IONIZATION CONSTANT OF SAID UNSTATURATED CARBOXYLIC ACID, AND IS PRESENT IN AN AMOUNT SUFFICIENT TO PROTONATE FROM ABOUT 25 TO ABOUT 200 PERCENT OF THE AMINE GROUPS OF SAID INTERPOLYMER.
Claim 2
Independent Claim
170 words
A METHOD OF PREPARING A CATIONIC ELECTRODEPOSITABLE, NON-GELLED, CARBOXYL-CONTAINING, THERMOSETTING ACRYLIC INTERPOLYMER COMPRISING INTERPOLYMERIZING THE FOLLOWING MONOMERS: A. FROM ABOUT 40 TO ABOUT 94 PERCENT BY WEIGHT OF AN ALKYL ESTER OF ACRYLIC OR METHACRYLIC ACID; B. FROM ABOUT 5 TO ABOUT 25 PERCENT BY WEIGHT OF AN ALPHA, BETAETHYLENICALLY UNSATURATED AMINO-ALKYL MONOMER, WHEREIN SAID AMINO GROUP IS SELECTED FROM THE CLASS CONSISTING OF A SECONDARY AMINE AND A TERTIARY AMINE; C. FROM ABOUT 1 TO ABOUT 15 PERCENT OF A MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACID; AND D. FROM 0 TO ABOUT 30 PERCENT BY WEIGHT OF A COPOLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER, WHEREIN SAID PERCENTS BY WEIGHT ARE BASED ON THE SOLIDS CONTENT OF THE INTERPOLYMER, AND WHEREIN THE INTERPOLYMERIZATION IS CARRIED OUT IN THE PRESENCE OF AN ACID SOLUBILIZING AGENT, WHEREIN SAID ACID HAS AN IONIZATION CONSTANT GREATER THAN THE IONIZATION CONSTANT OF SAID UNSTATURATED CARBOXYLIC ACID, AND IS PRESENT IN AN AMOUNT SUFFICIENT TO PROTONATE FROM ABOUT 25 TO ABOUT 200 PERCENT OF THE AMINE GROUPS OF SAID INTERPOLYMER.
Claim 3
Dependent Claim
14 words
The method as in claim 1 wherein the solubilizing agent is an aliphatic acid.
Claim 4
Dependent Claim
13 words
The method as in claim 2 wherein said aliphatic acid is lactic acid.
Claim 5
Dependent Claim
33 words
The method as in claim 1 wherein said alkyl ester is a member of the class consisting of methyl acrylate, ethyl acrylate, butyl acrylate, hydroxyethyl acrylate, butyl methacrylate, ethyl methacrylate and 2-hydroxyethyl methacrylate.
Claim 6
Dependent Claim
26 words
The method as in claim 1 wherein said tertiary alpha, betaethylenically unsaturated aminoalkyl monomer is a member of the class consisting of N,N-dimethylaminoethyl methacrylate and N-vinylimidazole.
Claim 7
Dependent Claim
24 words
The method as in claim 1 wherein said monoethylenically unsaturated carboxylic acid is a member of the class consisting of acrylic and methacrylic acid.
Claim 8
Dependent Claim
27 words
The method as in claim 1 wherein said copolymerizable ethylenically unsaturated monomer is a member of the class consisting of styrene, butyl acrylate, 2-ethylhexyl acrylate and acrylonitrile.
Claim 9
Dependent Claim
8 words
The product of the process of claim 1.
Claim 10
Dependent Claim
36 words
The method as in claim 1 wherein the monomers are added to a refluxing mixture comprising an organic solvent and said acid solubilizing agent, wherein said solubilizing agent is in the form of an aqueous solution.
Claim 11
Dependent Claim
28 words
The method as in claim 9 wherein the alpha, beta-ethylenically unsaturated aminoalkyl monomer is separate from, but added simultaneously with, a mixture of monomers (A), (C) and (D).
Claim 12
Dependent Claim
18 words
The method as in claim 1 wherein (C) is at least 8 percent of the interpolymer solids content.
Claim 13
Dependent Claim
8 words
The product of the method of claim 9.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |