Method for producing silicone aqueous emulsion compositions

Claim 1

A method for producing silicone aqueous emulsion compositions consisting essentially of (1) adjusting a base emulsion composition which consists essentially of (A) 100 parts by weight of a polydiorganosiloxane which contains at least 2 silicon-bonded hydroxyl groups per molecule, the organic groups being monovalent halogenated hydrocarbon radicals or monovalent hydrocarbon radicals, (B) from 1 to 150 parts by weight colloidal silica or from 0.3 to 30 parts by weight alkali metal silicate, (C) from 0.01 to 10 parts by weight of a curing catalyst, said catalyst being a metal salt of an organic acid, (D) from 2 to 30 parts by weight emulsifier, and (E) water to a pH of from 9 to 12, (2) ripening at a temperature of from 10 to 95°C for a sufficient period of time that an elastomeric material will be formed when water is removed at room temperature, and characterizingly (3) adding (F) from 0.5 to 30 parts by weight of an amino-functional silane of the formula: (XR) n Si(OR') 4-n where X is an amino-functional radical, R is a divalent hydrocarbon radical containing no more than 8 carbon atoms, R' is a monovalent hydrocarbon radical containing less than 7 carbon atoms or is selected from the group consisting of -CH 2 OC 2 H 5 or - CH 2 CH 2 OCH 3 , and n is 1, 2, or 3,or its partial hydrolysis condensate.

Claim 2

A method for producing silicone aqueous emulsion compositions consisting essentially of (1) adjusting a base emulsion composition which consists essentially of (A) 100 parts by weight of a polydiorganosiloxane which contains at least 2 silicon-bonded hydroxyl groups per molecule, the organic groups being monovalent halogenated hydrocarbon radicals or monovalent hydrocarbon radicals, (B) from 1 to 150 parts by weight colloidal silica or from 0.3 to 30 parts by weight alkali metal silicate, (C) from 0.01 to 10 parts by weight of a curing catalyst, said catalyst being a metal salt of an organic acid, (D) from 2 to 30 parts by weight emulsifier, and (E) water to a pH of from 9 to 12, (2) ripening at a temperature of from 10 to 95°C for a sufficient period of time that an elastomeric material will be formed when water is removed at room temperature, and characterizingly (3) adding (F) from 0.5 to 30 parts by weight of an amino-functional silane of the formula: (XR) n Si(OR') 4-n where X is an amino-functional radical, R is a divalent hydrocarbon radical containing no more than 8 carbon atoms, R' is a monovalent hydrocarbon radical containing less than 7 carbon atoms or is selected from the group consisting of -CH 2 OC 2 H 5 or - CH 2 CH 2 OCH 3 , and n is 1, 2, or 3,or its partial hydrolysis condensate.