Patent ID: 6159546
Filing Date: 2000-12-12
Classification: B05D,B32B,C08J,C09D

Abstract:
A process for producing a coated film continuously, consisting essentially of:running a substrate film; andextruding a coating composition, having a viscosity of 0.1-100 cps at 20.degree. C. and which undergoes hydrolytic condensation with moisture present in the air, through a slit of a die of a closed extruder onto a surface of the substrate film thereby producing a coated layer;moistening the coated layer under an atmosphere of at least 5% relative humidity before, during or after heating of the coated substrate which follows moistening; andheating the coated substrate thereby drying the coated layer such that it has an oxygen permeability of 20 cc/m.sup.2.24 hours.atm or lower at 20.degree. C. and 80% relative humidity, a surface smoothness of .+-.25% per 500 m and a thickness of 0.5-10 .mu.m;wherein said coating composition comprises an organosilane compound of formula (I) and/or a hydrolytic condensation product thereof:R.sup.1.sub.m Si(OR.sup.2).sub.n, (I)wherein R.sup.1 is hydrogen, lower alkyl, allyl, a mercapto group directly bonded to a vinyl group or a carbon chain, amino or (meth)acryloyl; each R.sup.2 is the same or different and is hydrogen, lower alkyl or acyl; R.sup.1 and R.sup.2 each may have an arbitrary substituent; m is 0 or 1; n is 3 or 4 and m+n is 4; and a solvent.