Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A soil-repellent coating composition comprising silica, polyvinyl alcohol and a wetting agent in an aqueous carrier medium, characterised in that the composition contains: a) 0.5-30 % by weight, based on the total weight of the composition, of silica in the form of an alkali stabilised silica sol having an average particle size of 4-30 nm, b) 0.01-6 % by weight, based on the total weight of the composition, of polyvinyl alcohol, the weight ratio of silica to polyvinyl alcohol being higher than 3:1, and c) 0.05-2.5 % by weight of a wetting agent, based on the total weight of the composition.
Claim 2
Dependent Claim
101 words
A soil-repellent coating composition comprising silica, polyvinyl alcohol and a wetting agent in an aqueous carrier medium, characterised in that the composition contains: a) 0.5-30 % by weight, based on the total weight of the composition, of silica in the form of an alkali stabilised silica sol having an average particle size of 4-30 nm, b) 0.01-6 % by weight, based on the total weight of the composition, of polyvinyl alcohol, the weight ratio of silica to polyvinyl alcohol being higher than 3:1, and c) 0.05-2.5 % by weight of a wetting agent, based on the total weight of the composition.
Claim 3
Dependent Claim
49 words
A composition according to claim 1, char- acterised in that it is a storage composition which is to be diluted before use and contains: a) 10-30 % by weight of silica, b) 1.0-6 % by weight of polyvinyl alcohol, and c) 0.25-2.5 % by weight of a wetting agent.
Claim 4
Dependent Claim
41 words
A composition according to claim 1, char- acterised in that it is a ready-made composition containing: a) 0.5-5 % by weight of silica, b) 0.01-1.0 % by weight of polyvinyl alcohol, and c) 0.05-0.5 % by weight of a wetting agent.
Claim 5
Dependent Claim
55 words
A composition according to claim 1, char- acterised in that the alkali stabilised silica sol is stabilised with MOH such that the weight ratio of SiO 2 to M 2 0 is in the range 20:1 to 300:1, M + being chosen from at least one of K , Na and NH 4 + .
Claim 6
Dependent Claim
19 words
A composition according to claim 4, charac- terised in that the silica sol is stabilised with NH 4 0H.
Claim 7
Dependent Claim
19 words
A composition according to claim 1, charac- terised in that the silica sol is surface modified with sodium aluminate.
Claim 8
Dependent Claim
25 words
A composition according to claim 1, charac- terised in that the weight ratio of silica to polyvinyl alcohol is in the range 5:1 to 40:1.
Claim 9
Dependent Claim
18 words
A composition according to claim 3, charac- terised in that the silica concentration is 2-3 % by weight.
Claim 10
Dependent Claim
20 words
A composition according to claim 1, charac- terised in that the polyvinyl alcohol has a hydrolysis degree of 85-100 %.
Claim 11
Dependent Claim
17 words
A composition according to claim 1, char- acterised in that the wetting agent is nonionic or anionic.
Claim 12
Dependent Claim
27 words
A composition according to claim 3, char- acterised in that the aqueous carrier medium contains up to 20 % by weight of a water-miscible, low-boiling, organic solvent.