Patent ID: 6054601
Filing Date: 2000-04-25
Classification: B05D,C03C,C04B,C08G,C09D,C09K,C23C,D06M,D21H,Y10T

Abstract:
A process for the preparation of an organopolysiloxane containing composition comprising:organopolysiloxanes of formula I:HO{Si (A) (CH.sub.3).sub.z (OH).sub.1-z O}.sub.a {Si(B) (R.sup.2).sub.y (OH) .sub.1-y O}.sub.b {Si(C)(CH.sub.3)O}.sub.c {Si(D)(OH)O}.sub.4 H.multidot.(HX).sub.c (I)wherein A is an aminoalkyl group of formula II:H.sub.2 N(CH.sub.2).sub.f (NH).sub.g (CH.sub.2).sub.h Si(OR).sub.3-z (CH.sub.3).sub.z (II),in which 0.gtoreq.f.gtoreq.6, g=0 if f=0 and g=1 if f>0, 0.ltoreq.h.gtoreq.6 and 0.ltoreq.z.gtoreq.1;B is a fluoroakyl group of formula III;R.sup.1 -Y-(CH.sub.2).sub.2 Si(R.sup.2).sub.y (OR).sub.3-y (III)wherein R.sup.1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms or a mono-, oligo- or perfluorinated aryl group. Y is a CH.sub.2, O or S group. R.sup.2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0.ltoreq.y.ltoreq.1:C is an alkyl group of formula IV:R.sup.3 --Si(CH.sub.3)(OR).sub.2 (IV),and D is an alkyl group of formula V:R.sup.3 --Si(OR).sub.3 (V)wherein R.sup.3 in each case is identical or different and is a linear, branched or cyclic alkyl group having 1-8 C atoms, and R in each case is identical or different and is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group;and wherein HX is an acid, wherein X is an inorganic or organic acid radical, and 0.ltoreq.y.ltoreq.1, 0.ltoreq.z.ltoreq.1, a>0, b>0, c.gtoreq.0, d.gtoreq.0, e.gtoreq.0 and (a+b+c+d).gtoreq.2, the composition being essentially free from organic solvents, having a flash point of more than 70.degree. C. and liberating essentially no alcohols by hydrolysis on dilution with water; which comprises:mixing a, b, c and d mols of organopolysiloxanes of formulas I, III, IV and V, respectively, in a molar ratio of 0.1.ltoreq.(a/(b+c+d)) where a>0, b>0, c.gtoreq.0, d.gtoreq.0 to form an organosilane mixture;mixing the organosilane mixture with at least one selected from the group consisting of water; a water/acid mixture, and a water/acid/alcohol mixture and a mixture thereof, the amount of acid being selected such that the reaction mixture has a pH in the range of 1-8; andremoving the alcohol already present or formed during the reaction.