Guanidine-based coating compositions
OwnerJohn David Payne, Kevin Johnson +4inventors
InventorsJohn David Payne, Kevin Johnson, Mark Holbrook, Mark Kenworthy, Stephen George Yeates, Tom Annable
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Abstract
A coating composition comprising pigment, medium and binder comprising a poly(C3-18-hydrocarbyl mono guanidine) and characterised in that the weight ratio of pigment to binder in the composition is at least 2:1. Also a recording material comprising this composition, a process for forming the recording material, and an ink-jet printing process utilizing the recording material.
Claims15
A coating composition comprising pigment, medium and binder comprising a poly(C3-18-hydrocarbyl mono guanidine) and characterised in that the weight ratio of pigment to binder in the composition is at least 2:1.
A composition according to any one of the preceding claims wherein the binder comprises a poly(C3-18-hydrocarbyl mono guanidine) and one or more further binders.
A composition according to any one of the preceding claims wherein the pigment is a porous pigment.
A composition according to any one of the preceding claims wherein the pigment comprises alumina or surface modified silica or a mixture thereof.
A composition according any one of the preceding claims wherein the binder comprises a poly(C3-18-hydrocarbyl mono guanidine comprising a repeat unit of Formula (1) and polyvinylalcohol.
A composition according to any one of the preceding claims wherein the medium is a liquid medium.
A composition according to any one of the preceding claims the poly(C3-18-hydrocarbyl mono guanidine) preferably comprises one or more groups of Formula (3) or salts thereof:
- 4
- wherein:
- n is 2 to 100
A coating composition according to any one of the preceding claims which comprises:
- (a) 0.5 to 25 parts of a binder comprising 0.5 to 15 parts of a poly(C3-18-hydrocarbyl mono guanidine) and 0 to 24.5 parts of a further binder,
- (b) 7.5 to 50 parts of pigment;
- and
- (c) 1 to 90 parts of a liquid medium comprising water or a mixture of water and organic solvent;
- wherein all parts are by weight, the total number of parts (a)+(b)+(c)=100 and the weight ratio of pigment to total binder in the composition is at least 2:1.
Dependencies are inferred from the claim text.