Patent ID: 6472012
Filing Date: 2002-10-29
Classification: C03C,Y10T

Abstract:
A process for forming an antireflection film as adhered on a glass surface, which comprises preparing a reaction mixture comprising a silicon compound (A) of the following formula (1):Si(OR)4â€ƒâ€ƒ(1) wherein R is a C1-5 alkyl group, a silicon compound (B) of the following formula (2):R1Si(OR2)3â€ƒâ€ƒ(2) wherein R1 is a C1-18 organic group, and R2 is a C1-5 alkyl group, an alcohol (C) of the following formula (3):R3CH2OHâ€ƒâ€ƒ(3) wherein R3 is a hydrogen atom or an unsubstituted or substituted C1-12 alkyl group, and oxalic acid (D), in a ratio of from 0.05 to 4.5 mol of the silicon compound (B) per mol of the silicon compound (A), in a ratio of from 0.5 to 100 mol of the alcohol (C) per mol of the total alkoxy groups contained in the silicon compounds (A) and (B), and in a ratio of from 0.2 to 2 mol of the oxalic acid per mol of the total alkoxy groups contained in the silicon compounds (A) and (B); heating the reaction mixture at a temperature of from 50 to 180Â° C. until the total amount of the silicon compounds (A) and (B) remaining in the reaction mixture becomes at most 5 mol %, while maintaining a SiO2 concentration of from 0.5 to 10 wt % as calculated from silicon atoms in the reaction mixture and maintaining absence of water, to form a polysiloxane solution; coating the polysiloxane solution on a glass surface to form a coating film; and heat-curing the coating film at a temperature of from 480 to 520Â° C.