EP0063018B1
Expired / Lapsed
EP
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Acrylamid-copolymers suitable as thickening agent for aqueous systems and aqueous compositions containing them
Assignee: Rohm and Haas Co
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Filing: 1982-04-05
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Granted: 1986-12-03
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Expires: 2002-04-05
Abstract
No abstract record available.
Inventors
- 👤 William David Emmons
- 👤 Travis Edward Stevens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:59
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C09D7/00; C09D7/40; C09D7/43; C08L; C08L33/00; C08L33/24; C08L33/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
A water soluble addition copolymer of acrylamide and an N-substituted acrylamide suitable for use as a thickening agent for aqueous systems, whereby: (i) the copolymer is prepared by addition polymerisation of a monomer charge comprising on a weight basis at least 50% acrylamide from 0.01 to 50% N-substituted acrylamide, and from 0 to 49.99% of one or more other vinyl monomers. (ii) the substituent on the N-substituted acrylamide is a hydrocarbyl group of at least 6 carbon atoms, or is such a group attached to the nitrogen atom via a polyoxyalkylene chain; and (iii) the copolymer has a weight average molecular weight of greater than 30,000.
Claim 2
Dependent Claim
106 words
A water soluble addition copolymer of acrylamide and an N-substituted acrylamide suitable for use as a thickening agent for aqueous systems, whereby: (i) the copolymer is prepared by addition polymerisation of a monomer charge comprising on a weight basis at least 50% acrylamide from 0.01 to 50% N-substituted acrylamide, and from 0 to 49.99% of one or more other vinyl monomers. (ii) the substituent on the N-substituted acrylamide is a hydrocarbyl group of at least 6 carbon atoms, or is such a group attached to the nitrogen atom via a polyoxyalkylene chain; and (iii) the copolymer has a weight average molecular weight of greater than 30,000.
Claim 3
Dependent Claim
67 words
A copolymer according to claim 1, wherein the N-substituted acrylamide is a compound of the formula wherein R, is a group and R 2 is H or a group, where R 3 and R 5 are each H or CH 3 , R 4 and R 6 are each hydrocarbyl groups of 6 or more carbon atoms, and n and m are each 0 or an integer.
Claim 4
Dependent Claim
20 words
A copolymer according to claim 2, wherein R 2 is H and R 4 is C 6 ―C 36 alkyl.
Claim 5
Dependent Claim
15 words
A copolymer according to claim 3, where R 4 is C 8 -C 18 alkyl.
Claim 6
Dependent Claim
12 words
A copolymer according to claim 3 or 4, where n is zero.
Claim 7
Dependent Claim
16 words
A copolymer according to claim 3 or 4, where n is an integer of from 1-40.
Claim 8
Dependent Claim
26 words
A copolymer according to any one of claims 2 to 6, where the monomer charge contains from 0.05 to 20% by weight of the N-substituted acrylamide.
Claim 9
Dependent Claim
22 words
A copolymer according to any one of claims 2 to 7, wherein the weight average molecular weight is from 50,000 to 1,000,000.
Claim 10
Dependent Claim
34 words
A copolymer according to any one of claims 2 to 8, which is an addition polymer of a monomer charge containing up to 30% by weight of other hydrophilic water-soluble monomers besides said acrylamide.
Claim 11
Dependent Claim
25 words
A copolymer according to claim 9, wherein said other monomer(s) is or are selected from N-vinylpyrrolidone, hydroxyethyl methacrylate, hydroxyethyl acrylate, acrylic acid and methyacrylic acid.
Claim 12
Dependent Claim
18 words
An aqueous composition containing, as a thickening agent, copolymer as claimed in any one of the preceding claims.
Claim 13
Dependent Claim
12 words
An aqueous composition according to claim 11, which is a multiphase system.
Claim 14
Dependent Claim
32 words
An aqueous composition according to claim 12, comprising an aqueous emulsion polymer latex containing from 0.1 to 15% by weight of the thickening agent, based on the weight of the emulsion polymer.
Claim 15
Dependent Claim
31 words
An aqueous composition according to claim 12, comprising an aqueous printing ink containing from 0.1 to 20% by weight of the thickening agent, based on the total weight of the composition.
References Cited (Backward Citations)
EP0048094A1
Cited
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