Emulsifier-free oil-in-water type emulsions of organopolysiloxanes and their use in technical applications

摘要

An emulsifier-flee oil-in-water emulsion is based on organofunctionally modified polysiloxanes. An emulsifier-flee oil-in-water emulsion based on organofunctionally modified polysiloxanes, comprises components (A) of formula (H 3C) a-Si(O f)-(O-R 1) b, component (B) of formula R 1Si(CH 3)(R 2)O-[Si(CH 3)(CH 3)O] a{-Si(CH 3)((O)-Si(R 1)-CH 3-CH 3)) b-O} cSi(CH 3(R 2)-R 1, component C of formula R 1Si(CH 3)(R 2)O-[Si(CH 3)(CH 3)O] a{-Si(CH 3)((O)-Si(R 1)-CH 3-CH 3)) b-O} cSi(CH 3(R 2)-R 1, and/or component (D) of formula R 1Si(CH 3)(R 2)O-[Si(CH 3)(CH 3)O] a{-Si(CH 3)((O)-Si(R 1)-CH 3-CH 3)) b-O} cSi(CH 3(R 2)-R 1, and component (D) of formula R 1Si(CH 3)(R 2)O-[Si(CH 3)(CH 3)O] a{-Si(CH 3)((O)-Si(R 1) -CH 3-CH 3)) b-O} cSi(CH 3(R 2)-R 1. R 1in component (A) : alkyl (preferably 1-4C alkyl); f : [4-(a+b)]/2; a : 1-1.95; b : 0.05-1; R 1in component (B) : hydrocarbon radical optionally containing double bonds or the radical -Z-(C nH 2n-O-) mR 'having a functionalization density of not less than500; R 'H, or alkyl; R 2Ph, Et, Me, OH or amino, with =90% methyl; Z in component B : divalent radical of formula -O-, NH-, -NR 3, or -S-; R 31-4C alkyl; n : greater than 2.7-4; m : 5-130; a : 4-1500; b or c : 0-100; R 1in component (B) : hydrocarbon radical optionally containing double bonds or the radical -Z-(C nH 2n-O-) mR 'having a functionalization density of 15-50; Z in component (C) : -(CH 2) p-O- or CH 2-CH(CH 3)-CH 2-O-; p : 2, 3, or 4; R 1in component (D) : 1-8C alkyl having radical -Z-(C nH 2n-O-) mR 'having a functionalization density of 3 to less than 15; R 'in component (D) : H or 1-8C alkyl, or acyl; Z in component (D) : -(CH 2) p-O- or CH 2-CH(CH 3)-CH 2-O-; p : 2, 3, or 4. Independent claims are also included for: (A) an emulsion paint or printing ink comprising a pigment and the emulsifier-free oil-in-water emulsion, excluding the presence of an emulsifier; (B) a method for defoaming a surfactant solution or a surfactant concentrate without the addition of an emulsifier which comprises adding the emulsifier-free oil-in-water emulsion; and (C) a varnish which comprises an aqueous binder and the emulsifier-free oil-in-water emulsion, excluding the presence of an emulsifier.