WATER-REPELLING PROTECTIVE COMPOSITION FOR COATING FILM CONTAINING COLLOIDAL SILICA CORE/SILICONE SHELL BODY, MOLD RELEASING AGENT COMPOSITION, WATER-REPELLING PROTECTIVE COMPOSITION FOR BUILDING AND FIBER-PROCESSING AGENT

摘要

PROBLEM TO BE SOLVED: To obtain a water-repelling protective composition for coating film, capable of forming a film having excellent weather resistance and adhesion over coating film of an automobile or the like and protecting the beautiful appearance of the coating film from natural pollution or the like by adding a specific colloidal silica core/silicone shell body. ;SOLUTION: This composition is obtained by compounding (A) the main component, a colloidal silica core/silicone shell body, comprising (i) 80-5 wt.% of a core consisting of colloidal silica and (ii) 20-95 wt.% of a shell consisting of a polyorganosiloxane of the equation of an average composition: R1aSiO(4-a)/2 (R1 is H or a monovalent hydrocarbon; a=1.80-2.20), (e.g. octamethylcyclotetrasiloxane), and optionally (B) a blocking agent and (C) an abrasive agent or the like. The colloidal silica is an aqueous dispersion having SiO2 as the basic unit, and preferably has an average particle size of 4-300 nm.;COPYRIGHT: (C)2000,JPO