Patent EP0216479B1 successfully refreshed from Google Patents.
EP0216479B1
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EP
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Polymeric thickeners and their production
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1986-08-06
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Granted: 1991-02-13
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Expires: 2006-08-06
Abstract
No abstract record available.
Inventors
- 👤 David Farrar
- 👤 Malcolm Hawe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 19:45
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08F; C08F2/00; C08F2/32; C08F246/00; C08J3/09; C08F216/00; C08F216/12; C08F216/14; C08F216/1416; C08F216/1425; C08F216/1433; C08F220/00; C08F220/02; C08F220/10; C08F220/20; C08J2300/00; C08J2300/10; C08J2300/14
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
173 words
A polymer selected from polymers that are substantially non swelling and insoluble in water but soluble or swellable in aqueous acid or alkali, cross linked polymers, and linear polymers having intrinsic viscosity at least 0.5 (measured as single point at 0.05% concentration in methanol), and formed by polymerising (a) 0 to 90% by weight of ethylenically unsaturated ionic monomer (b) 0 to 90% by weight of ethylenically unsaturated substantially non-ionic monomer (c) 1 to 100% by weight of an ethylenically unsaturated monomer that carries a pendant group -B n R where B is ethylenoxy, n is zero or a positive integer, and R is a hydrocarbyl group of 8 to 30 carbons selected from alkyl, aralkyl, aryl, alkaryl and cycloalkyl (d) 0 to 1% by weight of cross linking agentthat is polyethylenically unsaturated monomer, characterised in that monomers a, b, c and d are mixed before the polymerisation and that monomer (c) is an allyl ether of the formula CH 2 = CR'CH 2 0B n R where R' is hydrogen or methyl.
Claim 2
Dependent Claim
173 words
A polymer selected from polymers that are substantially non swelling and insoluble in water but soluble or swellable in aqueous acid or alkali, cross linked polymers, and linear polymers having intrinsic viscosity at least 0.5 (measured as single point at 0.05% concentration in methanol), and formed by polymerising (a) 0 to 90% by weight of ethylenically unsaturated ionic monomer (b) 0 to 90% by weight of ethylenically unsaturated substantially non-ionic monomer (c) 1 to 100% by weight of an ethylenically unsaturated monomer that carries a pendant group -B n R where B is ethylenoxy, n is zero or a positive integer, and R is a hydrocarbyl group of 8 to 30 carbons selected from alkyl, aralkyl, aryl, alkaryl and cycloalkyl (d) 0 to 1% by weight of cross linking agentthat is polyethylenically unsaturated monomer, characterised in that monomers a, b, c and d are mixed before the polymerisation and that monomer (c) is an allyl ether of the formula CH 2 = CR'CH 2 0B n R where R' is hydrogen or methyl.
Claim 3
Dependent Claim
16 words
A polymer according to claim 1 in which monomer (a) comprises a vinyl carboxylic acid monomer.
Claim 4
Dependent Claim
21 words
A polymer according to claim 2 in which monomer (a) is selected from acrylic acid and methacrylic acid and mixtures thereof.
Claim 5
Dependent Claim
16 words
. 4. A polymer according to claim 1 in which monomer (a) comprises a cationic monomer.
Claim 6
Dependent Claim
22 words
A polymer according to claim 4 in which monomer (a) is selected from dialkylaminoalkyl (meth) acrylate monomers and dialkylaminoalkyl (meth) acrylamide monomers.
Claim 7
Dependent Claim
28 words
A polymer according to any preceding claim in which in monomer (c), R' is hydrogen, m and p are each zero and n is from 5 to 100.
Claim 8
Dependent Claim
26 words
A composition according to any preceding claim in which, in monomer (c), R contains 10 to 24 carbon atoms and is selected from alkyl and alkaryl.
Claim 9
Dependent Claim
28 words
A composition according to any preceding claim made by oil in water polymerisation of 5-90% monomer (a), 5-90% monomer (b), 1-90% monomer (c) and 0-1% cross linking agent.
Claim 10
Dependent Claim
42 words
A polymer according to claim 8 formed from 20 to 60% by weight acrylic acid and/or methacrylic acid, 5 to 60% by weight ethyl acrylate and 2 to 50% by weight of the allyl ether, and 0 to 1% cross linking agent.
Claim 11
Dependent Claim
42 words
A polymer according to any preceding claim in which monomer (b) is present and is selected from styrene, alkyl-substituted styrenes, halo-substituted styrenes, (meth) acrylonitrile, vinyl alkanoates, vinyl, halides, vinylidene halides, hydroxy alkyl (meth) acrylates, alkoxy alkyl (meth) acrylates and alkyl (meth) acrylates.
Claim 12
Dependent Claim
17 words
A polymer according to claim 10 in which monomer (b) is selected from C1-4 alkyl (meth) acrylates.
Claim 13
Dependent Claim
19 words
A composition according to any preceding claim in which the said cross linking agent was present during the polymerisation.
Claim 14
Dependent Claim
21 words
A composition according to claim 12 in which the amount of the said cross-linking agent was up to 0.2% by weight.
Claim 15
Dependent Claim
21 words
A composition according to claim 12 in which the amount of the said cross-linking agent was up to 0.1% by weight.
Claim 16
Dependent Claim
34 words
A polymer according to any of claims 1 to 11 in which the polymer is linear is formed in the absence of the cross linking agent and has a molecular weight above 0.5 million.
Claim 17
Dependent Claim
34 words
A polymer according to any of claims 1 to 11 in which the polymer is linear is formed in the absence of the cross linking agent and has intrinsic viscosity of at least 3.
Claim 18
Dependent Claim
31 words
A polymer according to any of claims 12 to 16 that is water soluble and formed from 50-98% water soluble ionic or non ionic monomers and 2 to 50% monomer (c).
Claim 19
Dependent Claim
30 words
A polymer according to any of claims 12 to 16 formed from acrylic acid or dialkylaminoalkyl (meth) -acrylate or -acrylamide, and 0-80% acrylamide, and 2 to 50% of monomer (c).
Claim 20
Dependent Claim
14 words
Use of a polymer according to any preceding claim for thickening an aqueous composition.
Claim 21
Dependent Claim
55 words
A composition comprising a polymer according to claim 8 or claim 9 and which is in the form of an aqueous emulsion ata pH such that the polymer is insoluble and substantially unswollen and non thickening but can be converted to a dissolved or swollen and thickening state by the addition of acid or alkali.
Claim 22
Dependent Claim
33 words
A composition comprising a polymer according to 8 or claim 9 and that is at a pH such that the polymer is dissolved or swollen and the composition is thickened by the polymer.
Claim 23
Dependent Claim
13 words
A composition according to claim 20 selected from print pastes and emulsion paints.
Claim 24
Dependent Claim
28 words
A composition according to any of claims 20 to 22 and which also contains surfactant in an amount of 0.05 to 1 part per part by weight polymer.
References Cited (Backward Citations)
No citation records indexed.
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