Coating composition, process for producing optical element using the same, and optical element

摘要

ÄProblemÜTo provide a coating composition capable of forming a cured film having excellent scratch resistance as well as excellent adhesion between the cured film and an antireflection film formed on it; an optical element having excellent scratch resistance, whose adhesion between the cured film and the antireflection film is hardly lowered; and a process for producing the same. ÄMeans for ResolutionÜ A coating composition for forming a cured film between a plastic substrate and an antireflection film made of an inorganic oxide, which contains an organosilicon compound and an adhesion improver made of at least one selected from acetylene compounds of general formulae (I-a) to (I-d): wherein R and R each represents a hydrogen atom, or an optionally branched alkyl group having from 1 to 5 carbon atoms; R and R each represents an optionally branched alkyl group having from 2 to 8 carbon atoms; R and R each represents an optionally branched alkyl group having from 1 to 3 carbon atoms; m and n each indicate an integer of 1 to 15; and m' and n' each indicate an integer of 0 to 5.