Patent US3479718A successfully refreshed from Google Patents.
EP0172025A2
Expired / Lapsed
EP
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Polymeric compositions
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1985-08-14
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Granted: —
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Expires: 2005-08-14
Abstract
Abstract A polymer of an ethylenically unsaturated monomer containing a pendant hydrophobic group and, optionally, other monomers such as (meth) acrylic acid, ethyl acrylate or acrylamide is provided as a stable, substantially anhydrous dispersion containing at least 40% by weight of the polymer in a continuous phase of a non-aqueous liquid. The polymer in the dispersion generally includes acid groups and is neutralised, preferably with ammonia or a volatile amine. The dispersion can be made by reverse phase polymerisation of an aqueous blend of monomers, followed by dehydration, or by making the polymer from a water insoluble blend of monomers by oil in water emulsion polymerisation, dispersing the resultant oil in water emulsion into the non-aqueous liquid, and then dehydrating. The monomer including the hydrophobic group is preferably an allyl ether.
Inventors
- 👤 Adrian Allen
- 👤 David Farrar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 07:56
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08F; C08F2/00; C08F2/32; C08J3/09; C08J2300/00; C08J2300/10; C08J2300/14
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
73 words
A dispersion in a continuous liquid phase of a polymer that is formed by polymerising (a) 1 to 100% by weight ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) 0 to 99% other copolymerisable ethylenically unsaturated monomer characterised in that the dispersion is stable, substantially anhydrous and contains at least 40% by weight of the polymer, and the continuous liquid phase is a non-aqueous liquid.
Claim 2
Dependent Claim
73 words
A dispersion in a continuous liquid phase of a polymer that is formed by polymerising (a) 1 to 100% by weight ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) 0 to 99% other copolymerisable ethylenically unsaturated monomer characterised in that the dispersion is stable, substantially anhydrous and contains at least 40% by weight of the polymer, and the continuous liquid phase is a non-aqueous liquid.
Claim 3
Dependent Claim
63 words
A dispersion in a non-aqueous liquid that is stable, substantially anhydrous and contains at least 40% by weight of a polymer formed by polymerising ethylenically unsaturated monomer, characterised in that the monomer comprises (a) 1 to 100% by weight ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) 0 to 99% other copolymerisable ethylenically unsaturated monomer.
Claim 4
Dependent Claim
63 words
A dispersion in a non-aqueous liquid that is stable, substantially anhydrous and contains at least 40% by weight of a polymer formed by polymerising ethylenically unsaturated monomer, characterised in that the monomer comprises (a) 1 to 100% by weight ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) 0 to 99% other copolymerisable ethylenically unsaturated monomer.
Claim 5
Dependent Claim
68 words
A dispersion according to claim 1 or claim 2 in which the monomer (b) is present and includes acidic monomer, the polymer is substantially water insoluble and non-swellable when in free acid form but is a water soluble or swellable thickening polymer when in alkali metal, ammonium or amine salt form, and in which the polymer in the dispersion is in alkali metal, ammonium, or amine salt form.
Claim 6
Dependent Claim
17 words
A dispersion according to claim 3 in which the polymer is neutralised with ammonia or volatile amine.
Claim 7
Dependent Claim
21 words
A dispersion according to any preceding claim including a suspension stabiliser that is an amphipathic copolymer of hydrophilic and hydrophobic monomers.
Claim 8
Dependent Claim
13 words
A dispersion according to any preceding claim including a high HLB oil-in-water emulsifier.
Claim 9
Dependent Claim
25 words
A dispersion according to any preceding claim made by forming an aqueous dispersion of the polymer in a non-aqueous liquid and dehydrating the aqueous dispersion.
Claim 10
Dependent Claim
38 words
A dispersion according to claim 7 in which the polymer was formed from a water insoluble blend of monomers by oil in water emulsion polymerisation and the aqueous dispersion was formed by dispersing this emulsion into non-aqueous liquid.
Claim 11
Dependent Claim
30 words
A dispersion according to claim 8 in which the polymer contains acid groups which are converted to the salt form during or after dispersing the emulsion into non aqueous liquid.
Claim 12
Dependent Claim
36 words
A dispersion according to claim 7 in which the polymer was formed from a water soluble blend of monomers by reverse phase polymerisation of the water soluble blend in non-aqueous liquid to form the aqueous dispersion.
Claim 13
Dependent Claim
33 words
A dispersion according to any preceding claim in which monomer a is an amide or ester of an ethylenically unsaturated acid or a meth (allyl) ether and monomer b is an acrylic monomer.
Claim 14
Dependent Claim
59 words
A dispersion according to any preceding claim in which the monomer (a) has the formula CH2=CR'CH20BnAmR where R' is H or Me, A is propoxy or butoxy, B is ethoxy, n is zero or an integer 2 to 100, m is zero or an integer less than n, R is a hydrophobic group of at least 8 carbon atoms.
Claim 15
Dependent Claim
30 words
A dispersion according to any preceding claim in which the monomer (b) is (meth) acrylic acid alone or with acrylamide or with ethyl acrylate, optionally with a cross linking agent.
Claim 16
Dependent Claim
97 words
A process of making a stable anhydrous dispersion comprising forming a stable dispersion in non-aqueous liquid of an aqueous blend of ethylenically unsaturated monomer and polymerising by reverse phase polymerisation to form a stable dispersion of aqueous polymer in the non-aqueous liquid and dehydrating the dispersion to form a stable anhydrous dispersion containing at least 40% by weight of the polymer, characterised in that the monomer comprises (a) 1 to 100% by weight ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) O to 99% other copolymerisable ethylenically unsaturated monomer.
Claim 17
Dependent Claim
97 words
A process of making a stable anhydrous dispersion comprising forming a stable dispersion in non-aqueous liquid of an aqueous blend of ethylenically unsaturated monomer and polymerising by reverse phase polymerisation to form a stable dispersion of aqueous polymer in the non-aqueous liquid and dehydrating the dispersion to form a stable anhydrous dispersion containing at least 40% by weight of the polymer, characterised in that the monomer comprises (a) 1 to 100% by weight ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) O to 99% other copolymerisable ethylenically unsaturated monomer.
Claim 18
Dependent Claim
34 words
A process according to claim 14 in which the monomer (a) is the ester or amide of an ethylenically unsaturated acid, or (meth) allyl ether, with a hydroxy terminated surfactant of HLB above 8.
Claim 19
Dependent Claim
138 words
A process of making a stable dispersion in a continuous liquid phase of a polymer obtained by copolymerising (a) ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) other copolymerisable ethylenically unsaturated monomer including acidic monomer characterised in that the polymer is formed from a water insoluble blend of the monomers by oil in water emulsion polymerisation while the acidic monomer is in free acid form and the oil in water emulsion is then dispersed into non-aqueous liquid to form an aqueous dispersion of polymer in the non-aqueous liquid, the aqueous dispersion is then dehydrated to form a stable, substantially anhydrous dispersion containing at least 40% by weight of the polymer, and the acidic groups are converted to alkali metal, ammonium or amine form during or after forming the aqueous dispersion.
Claim 20
Dependent Claim
138 words
A process of making a stable dispersion in a continuous liquid phase of a polymer obtained by copolymerising (a) ethylenically unsaturated monomer containing a pendant hydrophobic group of at least 8 carbon atoms and (b) other copolymerisable ethylenically unsaturated monomer including acidic monomer characterised in that the polymer is formed from a water insoluble blend of the monomers by oil in water emulsion polymerisation while the acidic monomer is in free acid form and the oil in water emulsion is then dispersed into non-aqueous liquid to form an aqueous dispersion of polymer in the non-aqueous liquid, the aqueous dispersion is then dehydrated to form a stable, substantially anhydrous dispersion containing at least 40% by weight of the polymer, and the acidic groups are converted to alkali metal, ammonium or amine form during or after forming the aqueous dispersion.
Claim 21
Dependent Claim
32 words
l7. A process according to any of claims 14 to 16 in which the aqueous dispersion of polymer includes a suspension stabiliser that is an amphipathic copolymer of hydrophilic and hydrophobic monomers.
Claim 22
Dependent Claim
69 words
A process accorfding to any of claims 14 to 17 in which monomer a has the formula CH 2 =CR'CH 2 OB n A m R where R' is H or Me, A is propoxy or butoxy, B is ethoxy, n is zero or an integer 2 to 100, m is zero or an integer less than n, R is a hydrophobic group of at least 8 carben atoms.
References Cited (Backward Citations)
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