US4760110A
Expired / Lapsed
US
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Process for preparing anionic acrylic latex compositions
Assignee: PPG Industries Ohio Inc
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Filing: 1987-04-06
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Granted: 1988-07-26
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Expires: 2007-04-06
Abstract
Abstract Disclosed herein is an improved process for preparing anionic acrylic latex composition which contains copolymers containing effective amounts of acid groups and amino groups.
Inventors
- 👤 Suryya K. Das
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:36
CPC Classifications
C; C08; C08F; C08F285/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
In an improved process for preparing an anionic acrylic latex composition by copolymerizing ethylenically unsaturated monomers which contain an acid group and an amino group under conditions of free-radical initiated addition polymerization in an aqueous medium in the presence of an anionic emulsifier, the improvement comprising: i. copolymerizing in an aqueous medium in the presence of a surfactant the monomer containing the acid group with another monomer which is substantially free of an amino group, followed by ii. raising the pH of the resultant copolymer by adding a base thereto in an amount sufficient to avoid coagulation of the latex composition in the presence of the amino group-containing monomer, followed by iii. copolymerizing in the same aqueous medium the monomer containing amino group with another copolymerizable monomer which is substantially free of a carboxyl group.
Claim 2
Dependent Claim
135 words
In an improved process for preparing an anionic acrylic latex composition by copolymerizing ethylenically unsaturated monomers which contain an acid group and an amino group under conditions of free-radical initiated addition polymerization in an aqueous medium in the presence of an anionic emulsifier, the improvement comprising: i. copolymerizing in an aqueous medium in the presence of a surfactant the monomer containing the acid group with another monomer which is substantially free of an amino group, followed by ii. raising the pH of the resultant copolymer by adding a base thereto in an amount sufficient to avoid coagulation of the latex composition in the presence of the amino group-containing monomer, followed by iii. copolymerizing in the same aqueous medium the monomer containing amino group with another copolymerizable monomer which is substantially free of a carboxyl group.
Claim 3
Dependent Claim
18 words
The proces of claim 1 wherein the acid group containing monomer is an acrylic acid or methacrylic acid.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the base is ammonia, alkylamine, alkanolamine or an alkali metal hydroxide.
Claim 5
Dependent Claim
32 words
The process claim 1 wherein the amino group containing monomer is a water-soluble or a water-insoluble amino group containing monomer selected from the group consisting of tertiary-butylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl methacrylate.
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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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |