US4076677A
Expired / Lapsed
US
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Aqueous copolymer dispersions and method of producing the same
Assignee: DeSoto Inc
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Filing: 1976-06-23
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Granted: 1978-02-28
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Expires: 1996-06-23
Abstract
Abstract Monoethylenic monomers, including from about 1 to about 30% by weight of monoethylenic carboxylic acid, are placed in solution in a liquid mixture preferably containing a low molecular weight polyhydric alcohol and an anionic surfactant and this liquid mixture is dispersed in water containing a C 3 -C 4 alkanol and polymerized in the presence of an organic peroxide free radical polymerization catalyst at an elevated temperature, while agitating the dispersion. The dispersion of polymer particles is then at least partially neutralized, preferably with ammonia or an amine, to form an aqueous dispersion which is stable and which is useful in electrocoating.
Inventors
- 👤 Kazys Sekmakas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:36
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4407; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F246/00; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
100 words
A method of producing a dispersion of copolymer particles in water which is adapted for use in electrocoating comprising, forming a liquid mixture consisting essentially of monoethylenic monomers including from about 1% to about 30% by weight of monoethylenic carboxylic acid, dispersing said liquid mixture in water containing from about 15-40% of a C 3 -C 4 alkanol, based on the weight of the aqueous medium, to form a dispersion, polymerizing said dispersion in the presence of an organic peroxide polymerization catalyst at an elevated temperature, while agitating the dispersion, to form copolymer particles dispersed in the aqueous alcohol-containing medium.
Claim 2
Independent Claim
100 words
A method of producing a dispersion of copolymer particles in water which is adapted for use in electrocoating comprising, forming a liquid mixture consisting essentially of monoethylenic monomers including from about 1% to about 30% by weight of monoethylenic carboxylic acid, dispersing said liquid mixture in water containing from about 15-40% of a C 3 -C 4 alkanol, based on the weight of the aqueous medium, to form a dispersion, polymerizing said dispersion in the presence of an organic peroxide polymerization catalyst at an elevated temperature, while agitating the dispersion, to form copolymer particles dispersed in the aqueous alcohol-containing medium.
Claim 3
Dependent Claim
24 words
A method as recited in claim 1 in which said dispersion includes from about 0.1-5% of anionic surfactant, based on the material being polymerized.
Claim 4
Dependent Claim
47 words
A method as recited in claim 1 in which said liquid mixture of monomers includes from about 0.5% up to about 50% based on the weight of said monomers, of water insoluble trihydric or tetrahydric alcohol having a molecular weight of from 300 up to about 6000.
Claim 5
Dependent Claim
39 words
A method as recited in claim 3 in which said liquid mixture of monomers includes from 2 to 20% of said trihydric or tetrahydric alcohol and said dispersion includes 0.1-1% of anionic surfactant, based on the material being polymerized.
Claim 6
Dependent Claim
13 words
A method as recited in claim 4 in which said alkanol is n-butanol.
Claim 7
Dependent Claim
13 words
A method as recited in claim 4 in which said alkanol is isopropanol.
Claim 8
Dependent Claim
35 words
A method as recited in claim 1 in which said dispersion is stabilized by neutralization with an amine and neutralization is carried out to provide a dispersion having a pH in the range of 5-11.
Claim 9
Dependent Claim
30 words
A method as recited in claim 1 in which said monoethylenic monomers further include from about 1 to 20% of monoethylenic monomer having hydroxyl functionality as its sole reactive group.
Claim 10
Dependent Claim
25 words
A method as recited in claim 3 in which said trihydric or tetrahydric alcohol is a polyether derivative of glycerin, trimethylol propane, hexanediol or pentaerythritol.
Claim 11
Dependent Claim
16 words
A method as recited in claim 9 in which said polyhydric alcohol is a polyoxypropylene derivative.
Claim 12
Dependent Claim
24 words
A method as recited in claim 10 in which said polyoxypropylene derivative has a molecular weight in the range of from 350 to 5,000.
Claim 13
Dependent Claim
39 words
A method as recited in claim 4 in which said polyhydric alcohol is employed in an amount of from 3-12% and said monoethylenic carboxylic acid is present in an amount of from 3-20% of the weight of monoethylenic monomers.
Claim 14
Dependent Claim
38 words
A method as recited in claim 1 in which said monoethylenic monomers include up to about 20% of monomers which carry functional groups selected from the hydroxy group, the amido group, the methylol group, and the amino group.
Claim 15
Dependent Claim
8 words
The product of the method of claim 1.
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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |