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US4268641A
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Acrylic acid-acrylate copolymer thickening agents
Assignee: Union Carbide Corp
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Filing: 1980-05-29
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Granted: 1981-05-19
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Expires: 2000-05-29
Abstract
Abstract Copolymers of acrylic acid and nonionic surfactant acrylates have been found to be useful thickening agents for both aqueous solutions and water/liquid hydrocarbon emulsions.
Inventors
- 👤 Harvey S. Koenig
- 👤 George M. Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:17
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; Y; Y10; Y10S; Y10S526/00; Y10S526/932
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A normally solid, base-neutralized copolymer having copolymerized therein about 90 to about 99 mole percent of a carboxyl-containing, ethylenically unsaturated hydrocarbon and about 1 to about 10 mole percent of a nonionic surfactant acrylate having the formula: ##STR3## wherein R is hydrogen or methyl, R' is a hydrophobe selected from the group consisting of alkyl--O--, alkyl--NH--, and alkyl--CO--, where the alkyl contains 4 to about 30 carbon atoms, A is a divalent radical selected from the group consisting of oxyethylene units or mixed oxyalkylene units having the general formula: --OC.sub.n H.sub.2n -- wherein n is an integer having values from 2 to 4 and x is an integer having values of about 5 to about 40, said surfactant acrylate having an HLB value of about 10 to about 19.
Claim 2
Dependent Claim
129 words
A normally solid, base-neutralized copolymer having copolymerized therein about 90 to about 99 mole percent of a carboxyl-containing, ethylenically unsaturated hydrocarbon and about 1 to about 10 mole percent of a nonionic surfactant acrylate having the formula: ##STR3## wherein R is hydrogen or methyl, R' is a hydrophobe selected from the group consisting of alkyl--O--, alkyl--NH--, and alkyl--CO--, where the alkyl contains 4 to about 30 carbon atoms, A is a divalent radical selected from the group consisting of oxyethylene units or mixed oxyalkylene units having the general formula: --OC.sub.n H.sub.2n -- wherein n is an integer having values from 2 to 4 and x is an integer having values of about 5 to about 40, said surfactant acrylate having an HLB value of about 10 to about 19.
Claim 3
Dependent Claim
9 words
Copolymer claimed in claim 1 wherein R is hydrogen.
Claim 4
Dependent Claim
9 words
Copolymer claimed in claim 1 wherein R' is alkyl--O--.
Claim 5
Dependent Claim
9 words
Copolymer claimed in claim 1 wherein A is oxyethylene.
Claim 6
Dependent Claim
11 words
Copolymer claimed in claim 1 wherein A is mixed oxyalkylene groups.
Claim 7
Dependent Claim
11 words
Copolymer claimed in claim 1 wherein x is 8 to 12.
Claim 8
Dependent Claim
128 words
A normally solid, base-neutralized copolymer having copolymerized therein about 90 to about 99 mole percent of a carboxyl-containing, ethylenically unsaturated hydrocarbon and about 1 to about 10 mole percent of a nonionic surfactant acrylate having the formula: ##STR4## wherein R is hydrogen or methyl, R' is a hydrophobe selected from the group consisting of alkyl--NH-- and alkyl--CO--, where the alkyl contains 4 to about 30 carbon atoms, A is a divalent radical selected from the group consisting of oxyethylene units or mixed oxyalkylene units having the general formula: --OC.sub.n H.sub.2n -- wherein n is an integer having values from 2 to 4 and x is an integer having values of about 5 to about 40, said surfactant acrylate having an HLB value of about 10 to about 19.
Claim 9
Dependent Claim
128 words
A normally solid, base-neutralized copolymer having copolymerized therein about 90 to about 99 mole percent of a carboxyl-containing, ethylenically unsaturated hydrocarbon and about 1 to about 10 mole percent of a nonionic surfactant acrylate having the formula: ##STR4## wherein R is hydrogen or methyl, R' is a hydrophobe selected from the group consisting of alkyl--NH-- and alkyl--CO--, where the alkyl contains 4 to about 30 carbon atoms, A is a divalent radical selected from the group consisting of oxyethylene units or mixed oxyalkylene units having the general formula: --OC.sub.n H.sub.2n -- wherein n is an integer having values from 2 to 4 and x is an integer having values of about 5 to about 40, said surfactant acrylate having an HLB value of about 10 to about 19.
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |