Polymeric thickeners and their production
AssigneeAllied Colloids Limited
InventorsMalcolm Hawe, David Farrar
Life of this patent
Estimating the term…
Abstract
Polymers are made by polymerization of an ionic monomer such as methacrylic acid or dialkylaminoalkyl (meth)-acrylate or -acrylamide and/or a substantially non-ionic monomer, optionally a cross linking agent, and an allyl ether of the formula CH.sub.2 .dbd.CR'CH.sub.2 OA.sub.m B.sub.n A.sub.p R where R' is hydrogen or methyl, A is propyleneoxy or butyleneoxy, B is ethyleneoxy, n is zero or an integer, m and p are zero or an integer less than n, and R is a hydrophobic group of at least 8 carbon atoms. The polymers are preferably made by oil in water emulsion polymerization. They can be used as thickeners particularly in environments containing surfactant and/or electrolyte, including especially emulsion paints, print pastes, alkaline liquors and acidic liquors.
Claims37
A polymer that is substantially non swelling and insoluble in water but soluble or swellable in aqueous acid or alkali, and formed by oil in water emulsion polymerisation of a polymerisable mixture formed by mixing monomers consisting essentially of
- (a) 5 to 90% by weight of monolthylenically unsaturated ionic monomer
- (b) 5 to 90% by weight of monoethylenically unsaturated substantially non-ionic monomer
- (c) 0.5 to 90% by weight of a monoethylenically unsaturated monomer that carries a pendant group --B.sub.n R where B is ethylenoxy, n is zero or a positive integer and R is a hydrophobic hydrocarbyl group of at least 8 carbon atoms
- (d) 0 to 0.2% by weight of cross linking monomer, and in which monomer (c) is an allyl ether of the formula CH.sub.2 .dbd.CR'CH.sub.2 O.sub.n R where R' is hydrogen or methyl and in which B, n and R are as defined above and monomer (d) consists essentially of polyethylenically unsaturated monomer.
A linear polymer having intrinsic viscosity of at least 0.5 (measured as single point at 0.05% concentration in methanol) and formed by polymerisation in the absence of a cross-linking agent of
- (a) 0 to 90% by weight of monoethylenically unsaturated ionic monomer
- (b) 0 to 90% by weight of monoethylenically unsaturated substantially non-ionic monomer
- (c) 0.5 to 100% by weight of a monoethylenically unsaturated monomer that carries a pendant group --B.sub.n R where B is ethylenoxy, n is zero or a positive integer, and R is a hydrophobic hydrocarbyl group of at least 8 carbon atoms
- and in which monomer (c) is an allyl ether of the formula CH.sub.2 .dbd.CR'CH.sub.2 OB.sub.n R where R' is hydrogen or methyl and B, n and R are as defined above.
A linear, water soluble, polymer having intrinsic viscosity at least 0.5 (measured as single point at 0.05% concentration in methanol) and formed by polymerisation in the absence of a cross-linking agent of
- (a) 0 to 90% by weight of monoethylenically unsaturated ionic monomer
- (b) 0 to 90% by weight of monoethylenically unsaturated substantially non-ionic monomer
- (c) 0.5 to 100% by weight of a monoethylenically unsaturated monomer that carries a pendant group --B.sub.n R where B is ethylenoxy, n is zero or a positive integer, and R' is a hydrophobic hydrocarbyl group of at least 8 carbon atoms
- and in which monomer (c) is an allyl ether of the formula CH.sub.2 .dbd.CR'CH.sub.2 OB.sub.n R where R is hydrogen or methyl and B, n and R are as defined above and in which monomers (a) and (b) are water soluble and the polymer is formed from 2 to 15% by weight of the allyl ether and from 5 to 98% by weight of the monomers (a) and (b), and the polymer has molecular weight above 0.5 million.
A cross linked polymer formed by polymerisation of a polymerisable mixture formed by mixing monomers consisting essentially of
- (a) 0 to 90% by weight of monoethylenically unsaturated ionic monomer
- (b) 0 to 90% by weight of monoethylenically unsaturated substantially non-ionic monomer
- (c) 0.5 to 100% by weight of a monoethylenically unsaturated monomer that carries a pendant group --B.sub.n R where B is ethylenoxy, n is zero or a positive integer, and R is a hydrophobic hydrocarbyl group of at least 8 carbon atoms
- (d) 0.0005 to 0.2% by weight of cross linking monomer,
- and in which monomer (c) is an allyl ether of the formula CH.sub.2 .dbd.CR'CH.sub.2 B.sub.n R where R' is hydrogen or methyl and B, n and R are as defined above and monomer (d) consists essentially of polyethylenically unsaturated monomer.
A cross linked, water swellable, polymer formed by polymerisation of a polymerisable mixture formed by mixing monomers consisting essentially of
- (a) 0 to 90% by weight of monoethylenically unsaturated ionic monomer
- (b) 0 to 90% by weight of monoethylenically unsaturated substantially non-ionic monomer
- (c) 0.5 to 100% by weight of a monoethylenically unsaturated monomer that carries a pendant group --B.sub.n R where B is ethylenoxy, n is zero or a positive integer, and R is a hydrophobic hydrocarbyl group of at least 8 carbon atoms
- (d) 0.0005 to 0.2% by weight of cross linking monomer,
- and in which monomer (c) is an allyl ether of the formula CH.sub.2 .dbd.CR'CH.sub.2 B.sub.n R where R' is hydrogen or methyl and B, n and R are as defined above, monomer (d) consists essentially of polyethylenically unsaturated monomer, monomers (a) and (b) are water soluble and the polymer is formed from 2 to 95% by weight of the allyl ether and 5 to 98% by weight of the monomers (a) and (b).
Dependencies are inferred from the claim text.