Patent ID: 6048910
Filing Date: 2000-04-11
Classification: B01J,C09D,Y10T

Abstract:
A coating composition comprising an emulsion of a silicone resin dispersed in water, and photocatalyst particles, which forms a hydrophilic film having a water-drop contact angle of no more than 60.degree. when irradiated with UV-containing light, wherein said emulsion of a silicone resin dispersed in water is of an emulsion polymer which has been obtained from as main components:(i) 100 parts by weight of a water-insoluble, silanol group-bearing silicone resin of the average compositional formula (1):R.sup.1.sub.m R.sup.2.sub.n Si(OR.sup.3).sub.p (OH).sub.q O.sub.(4-m-n-p-q)/4 ( 1)wherein R.sup.1 is an unsubstituted monovalent hydrocarbon group; R.sup.2 is a substituted monovalent hydrocarbon group; R.sup.3 is an unsubstituted or substituted monovalent hydrocarbon group; and the letters m, n, p and q are numbers falling in the ranges 0.3.ltoreq.m.ltoreq.1.8, 0.ltoreq.n.ltoreq.1.0, 0.ltoreq.p.ltoreq.2.0, 0<q.ltoreq.1.7, 0.3.ltoreq.m+n.ltoreq.1.8, 0<p+q.ltoreq.3.0 and 0.3<m+n+p+q<4.0, and(ii) 10 to 1,000 parts by weight of a radical-polymerizable vinyl monomer,said emulsion being essentially free of organic solvents having a boiling point of less than 100.degree. C. and aromatic organic solvents.