Patent ID: 8530564

Claim:
An organic-inorganic composite dispersion comprising particles of a composite (X) dispersed in an aqueous medium (W), the composite (X) having a three-dimensional network formed of a polymer (A) of a monomer comprising a monomer (a) represented by Formula (1) where R 1 is a hydrogen atom or a methyl group, R 2 is a C 2 -C 3 alkylene group, R 3 is a C 1 -C 2 alkyl group and n is an integer of 1 to 9, and at least one inorganic material (C) selected from a water-swellable clay mineral and silica, wherein the particles of the composite (X) have a structure in which the inorganic material (C) is uniformly dispersed in the polymer (A), the concentration (wt %) of the inorganic material (C) in the aqueous medium (W) is <12.4Ra+0.05 when Ra<0.19, or <0.87Ra+2.17 when Ra>0.19, and Ra is from 0.01 to 10, where the concentration (wt %) of the inorganic material (C) is a value calculated by dividing the weight of the inorganic material (C) by the total weight of the aqueous medium (W) and the inorganic material (C) and multiplying the resulting value by 100, and Ra is a weight ratio ((C)/(A)) of the inorganic material (C) to the polymer (A).