LIQUID COMPOSITION, GLASS ARTICLE AND METHOD OF FORMING COATING FILM

摘要

There are provide a liquid composition for forming a silicon oxide-based cured coating film by the sol-gel method, the liquid composition having excellent storage stability and being capable of forming a coating film excellent in durability, in particular, alkali resistance even after long-term storage. A liquid composition applied on a surface of a substrate and cured by heating to form a coating film, contains: a matrix component containing a hydrolyzable silicon compound whose content is 20 to 60 mass % as a SiO2 content when silicon atoms contained in the matrix component are converted into SiO2 to the total solid content amount in the liquid composition; a functional component containing an ultraviolet absorbent and an infrared absorbent; water; and an acid thermally decomposing at 80° C. or higher and a temperature of the heating or lower, wherein a pH increases between before and after the thermal decomposition of the acid.

主权项

1. A liquid composition applied on a surface of a substrate and cured by heating to form a coating film, the liquid composition comprising:
a matrix component (a) containing a hydrolyzable silicon compound as main component and cured by a hydrolysis and condensation reaction by the heating to form a silicon oxide matrix; a functional component (c) imparting a predetermined function to the coating film; water (d); and an acid (e) thermally decomposing at 80° C. or higher and a temperature of the heating or lower, wherein the content of the matrix component (a) is 20 to 60 mass % as a SiO2 content when silicon atoms contained in the matrix component (a) are converted into SiO2, relative to the total solid content amount in the liquid composition, the functional component (c) contains an ultraviolet absorbent (c1) and an infrared absorbent (c2), and a pH after the thermal decomposition (pHa) of the acid (e) in the liquid composition is larger than a pH before the thermal decomposition (pHb).