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US4800220A
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Crosslinked carboxylic copolymers usable as thickeners in aqueous media and preparation thereof
Assignee: MANUFACTURE DE PRODUITS CHIMIQUES 2 PLACE JOFFRE 75007 PARIS FRANCE A Co OF FRANCE
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Filing: 1987-03-13
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Granted: 1989-01-24
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Expires: 2007-03-13
Abstract
Abstract The invention relates to the chemistry of polymers and to cross-linked carboxylic copolymers obtained by copolymerization of an unsaturated carboxylic monomer, a cross-linking agent, an acrylic or methacrylic acid ester with a polyalkylene glycol and, optionally, an alkyl acrylate or methacrylate. Utilization as thickeners, particularly of media containing dissolved salts.
Inventors
- 👤 Alain Ribba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:32
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; Y; Y10; Y10S; Y10S526/00; Y10S526/932
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
131 words
Crosslinked carboxylic colpolymers obtained by copolymerizing the following monomers in the indicated proportions by weight: (a) from 50 to 95% of at least one olefinically unsaturated carboxylic acid monomer, (b) from 5 to 25% of at least one ester of acrylic or methacrylic acid with a polyalkylene glycol having the general formula: ##STR8## in which R is H or CH 3 , R 1 is a divalent alkylene group containing from 2 to 6 carbon atoms inclusive, and n is an integer from 2 to 25, and (c) from 0.1 to 5% of at least one crosslinking agent chosen from unsaturated monomers containing at least two vinyl end groups CH 2 ═C<; as well as the products obtained by neutralizing at least partially said copolymers with an organic or inorganic base.
Claim 2
Dependent Claim
131 words
Crosslinked carboxylic colpolymers obtained by copolymerizing the following monomers in the indicated proportions by weight: (a) from 50 to 95% of at least one olefinically unsaturated carboxylic acid monomer, (b) from 5 to 25% of at least one ester of acrylic or methacrylic acid with a polyalkylene glycol having the general formula: ##STR8## in which R is H or CH 3 , R 1 is a divalent alkylene group containing from 2 to 6 carbon atoms inclusive, and n is an integer from 2 to 25, and (c) from 0.1 to 5% of at least one crosslinking agent chosen from unsaturated monomers containing at least two vinyl end groups CH 2 ═C<; as well as the products obtained by neutralizing at least partially said copolymers with an organic or inorganic base.
Claim 3
Dependent Claim
51 words
Copolymers according to claim 1, wherein the copolymerized monomers further comprise (d) up to 20% of at least one acrylic acid ester of the general formula: ##STR9## in which R is H or CH 3 and R 2 is a linear or branched alkyl group containing 4 to 20 carbon atoms.
Claim 4
Dependent Claim
17 words
Copolymers according to claim 2, wherein the monomer (d) is chosen from 2-ethylhexyl acrylate and stearyl methacrylate.
Claim 5
Dependent Claim
21 words
Copolymers according to claim 1, wherein the unsaturated carboxylic monomer (a) is chosen from acrylic acid, methacrylic acid and maleic anhydride.
Claim 6
Dependent Claim
64 words
Copolymers according to claim 1, wherein the monomer (b) is chosen from diethylene glycol monoacrylate, the monocrylate of polyethylene glycol of MW 200, the monoacrylate of polyethylene glycol of MW 1000, the monoacrylate of polyethylene glycol of MW 200, the monomethacrylate of polyethylene glycol of MW 200, the monomethacrylate of polyethylene glycol of MW 1000, and the monomethacrylate of polytetramethylene glycol of MW 650.
Claim 7
Dependent Claim
25 words
Copolymers according to claim 1, wherein the crosslinking agent (c) is chosen from allyl methacrylate, trimethylolpropane diallyl ether, pentaerythritol triallyl ether and sucrose polyallyl ether.
Claim 8
Dependent Claim
130 words
Process for preparing a crosslinked carboxylic copolymer, which comprises copolymerizing the following monomers in the indicated proportions by weight: (a) from 50 to 75% of at least one olefinically unsaturated carboxylic acid monomer, (b) from 5 to 25% of at least one ester of acrylic or methacrylic acid with a polyalkylene glycol having the general formula: ##STR10## in which R is H or CH 3 , R 1 is a divalent alkylene group containing from 2 to 6 carbon atoms inclusive, and n is an integer from 2 to 25, (c) from 0.1 to 5% of at least one crosslinking agent chosen from unsaturated monomers containing at least two vinyl end groups CH 2 ═C<; in an inert solvent in which the monomers are soluble and the copolymers are insoluble.
Claim 9
Dependent Claim
130 words
Process for preparing a crosslinked carboxylic copolymer, which comprises copolymerizing the following monomers in the indicated proportions by weight: (a) from 50 to 75% of at least one olefinically unsaturated carboxylic acid monomer, (b) from 5 to 25% of at least one ester of acrylic or methacrylic acid with a polyalkylene glycol having the general formula: ##STR10## in which R is H or CH 3 , R 1 is a divalent alkylene group containing from 2 to 6 carbon atoms inclusive, and n is an integer from 2 to 25, (c) from 0.1 to 5% of at least one crosslinking agent chosen from unsaturated monomers containing at least two vinyl end groups CH 2 ═C<; in an inert solvent in which the monomers are soluble and the copolymers are insoluble.
Claim 10
Dependent Claim
47 words
Process according to claim 7, including copolymerzing (d) up to 20% of at least one acrylic acid ester of the general formula: ##STR11## in which R is H or CH 3 and R 2 is a linear or branched alkyl group containing 4 to 20 carbon atoms.
Claim 11
Dependent Claim
24 words
Process according to claim 8, which further comprises the step of partially neutralizing the monomer (a) with an organic or inorganic base before copolymerizing.
Claim 12
Dependent Claim
24 words
Process according to claim 8, which further comprises the step of at least partially neutralizing the resultant copolymer with an organic or inorganic base.
Claim 13
Dependent Claim
16 words
Process according to claim 7, wherein benzene, ethyl acetate or methanol is employed as a solvent.
Claim 14
Dependent Claim
27 words
Process according to claim 7, wherein the polymerization is carried out at a temperature between 25° and 100° C. and with the aid of an organic catalyst.
Claim 15
Dependent Claim
17 words
Process according to claim 12, wherein the catalyst is chosen from azobisisobutyronitrile, lauroyl perozide and benzoyl peroxide.
Claim 16
Dependent Claim
24 words
Process according to claim 7, which further comprises the step of partially neutralizing the monomer (a) with an organic or inorganic base before copolymerizing.
Claim 17
Dependent Claim
24 words
Process according to claim 7, which further comprises the step of at least partially neutralizing the resultant copolymer with an organic or inorganic base.
References Cited (Backward Citations)
US2985625A
Cited
US2894921A
Cited
US3137660A
Cited
US2892820A
Cited
US2985631A
Cited
US3988305A
Cited
US4044196A
Cited
US4190562A
Cited
JPS5813608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |