Patent ID: 8945520
Filing Date: 2015-02-03
Classification: A61K,A61Q,B82Y,C01P,C09C

Abstract:
1. A titania fine-particle composite, comprising titania fine particles, of which the maximum diameter is 0.001 to 0.1 μm, combined with one or more selected from polymers containing, as constituent monomers, a carboxylic acid and/or a carboxylic acid derivative represented by the following general formula (1): where: R represents a C 1 to C 15 alkenyl group in which hydrogen atoms may be substituted with a carboxylic group or a hydroxy group; and X represents a hydrogen atom, an alkali metal, or a polyoxyalkylene group having an addition mole number of 1 to 12, wherein a half-value width of a peak of maximum diffraction intensity attributed to titania crystals is 2.0° or less in X-ray powder diffraction analysis, wherein an absorption peak attributed to a carbonyl group exists in a range of 1535 to 1545 cm wherein the concentration of the titania fine particles in the titania fine-particle composite is in the range of 85 to 99 wt %.