To obtain a coating composition not containing a compound in which harmfulness to human body is worried without lowering barrier property to gas such as oxygen or steam and useful for packaging uses, etc. of medicines etc. by including a specific organosilane, etc. as a main component.
This coating composition consists mainly of (A) at least one kind of compound among an organosilane of the formula, R1nSi(OR2)4-n [R1 is a 1-8C organic group; R2 is a 1-5C alkyl, a 1-6C acyl or the like; and (n) is 0-2], a hydrolysate of the above silane and condensate of the above silane and (B) a polyvinyl alcohol and/or ethylene-vinyl alcohol copolymer and (C) an organopolysiloxane of the formula [R3 to R8 are each a 1-8C organic group; (m) is ≥1; weight average molecular weight expressed in terms of polystyrene is 150-10,000; and SiO bond is straight-chain-like and/or branch-like bond].
OTAKI YASUSHI
ISHIKAWA SATOSHI
Next Patent: COATING COMPOSITION AND OPTICAL MATERIAL