Aqueous dispersion of addition polymer particles
AssigneeImperial Chemical Industries PLC
InventorsNeal St. John Williams, Stephen Barry Downing
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Abstract
An aqueous dispersion of particles of an addition polymer of ethylenically unsaturated monomers which dispersion also contains a stabilizing copolymer of a) weak acid containing species b) crosslinking species and optionally c) ethylenically singly unsaturated comonomers wherein the stabilizing copolymer contains at least 0.3% of crosslinking species.
Claims34
An aqueous dispersion comprising:
- particles of an addition polymer of ethylenically unsaturated monomers;
- and
- a stabilizing solution copolymer comprising:
- a) weak acid containing species
- b) crosslinking species and optionally
- c) ethylenically singly unsaturated comonomers;
- and
- wherein the stabilizing solution copolymer contains at least 0.3% of crosslinking species.
An aqueous dispersion according to any one of the preceding claims wherein the crosslinking species of b) are crosslinking comonomers selected from allyl methacrylate, vinyl acrylate, divinyl benzene, ethylene glycol dimethacrylate, di-allyl phthalate, hexane diol diacrylate, trimethylol propane triacrylate, penta erythritol triallyl ether, dicyclopentenyl oxyethyl methacrylate and glycerol triacrylate.
An aqueous dispersion according to any one of the preceding claims wherein the crosslinking species of b) are crosslinking comonomers which contain only two ethylenically unsaturated bonds.
An aqueous dispersion according to any one of the preceding claims wherein the acid containing species of a) contains a carboxylic acid group or its anhydride.
An aqueous dispersion according to any one of the preceding claims wherein the polymer particles are particles of a polymer or copolymer of monomers chosen from the group consisting of butyl acrylate, methyl methacrylate, butyl methacrylate, styrene, 2-ethyl hexyl acrylate, methoxy poly(oxyethylene)2000 methacrylate and allyl methacrylate.
A stabilizing solution copolymer comprising:
- a) weak acid containing species
- b) crosslinking species and optionally
- c) ethylenically singly unsaturated comonomers;
- and
- wherein the stabilizing solution copolymer comprises at least 0.03% crosslinking species.
A process for the preparation of a stabilizing solution copolymer comprising:
- polymerizing monomers of a weak acid containing species and a cross linking species in the presence of a free radical initiator;
- and
- wherein the monomers are polymerized in the presence of a solvent.
A process for the preparation of an aqueous dispersion comprising:
- polymerizing particles of addition polymers of ethylenically unsaturated monomers in the presence of a stabilizing solution copolymer;
- wherein the stabilizing solution copolymer comprises;
- a) weak acid containing species
- b) crosslinking species and optionally
- c) ethylenically singly unsaturated comonomers;
- and
- wherein the stabilizing solution copolymer contains at least 0.3% of crosslinking species.
An aqueous coating composition comprising:
- an aqueous dispersion comprising:
- particles of an addition polymer of ethylenically unsaturated monomers;a stabilizing solution copolymer comprising:
- a) weak acid containing species
- b) crosslinking species and optionally
- c) ethylenically singly unsaturated comonomers;
- and
- wherein the stabilizing solution copolymer contains at least 0.3% of crosslinking species.
An adhesive composition comprising:
- an aqueous dispersion comprising:
- particles of an addition polymer of ethylenically unsaturated monomers;a stabilizing solution copolymer comprising:
- a) weak acid containing species
- b) crosslinking species and optionally
- c) ethylenically singly unsaturated comonomers;
- and
- wherein the stabilizing solution copolymer contains at least 0.3% of crosslinking species.
Dependencies are inferred from the claim text.