Verfahren zur Herstellung einer Beschichtungszusammensetzung mit hohem Brechungsindex auf Basis von Polysiloxanen und Titanaten und die so hergestellte Zusammensetzung.

摘要

Process for the preparation of a polysiloxane resin composition for antiabrasive coating of high refractive index, characterised in that it comprises the hydrolysis of a first constituent of organosiloxane type to an alkoxysilane hydrolysate containing condensable silanol groups, and the reaction of the hydrolysate obtained with a second constituent consisting of an organic titanium compound containing at least one carboxylic acid titanic ester functional group, with addition of a quantity of water suitable to cause the hydrolysis of the remaining hydrolysable groups in the mixture obtained and the formation of a siloxane prepolymer incorporating the titanium.