Emulsions of silicones with non-aqueous hydroxylic solvents

A non-aqueous emulsion of a silicone composition said composition comprising:

• (1) a slurry of:
• (A) a silicone formed by the hydrosilylation product of
• (1) a linear alkenyl stopped polyorganosiloxane having the formula:
• MviaDxDviyM2−a
• where the subscript x is a number greater than 500, the subscript y is a number ranging from zero to about 20, the subscript a is a number ranging from 0 to 2, subject to the limitation that a+y is within the range of from 1 to about 20, with Mvi defined as:
• R1R2R3SiO1/2
• where R1 is a monovalent unsaturated hydrocarbon radical having from two to ten carbon atoms, and R2and R3 are each independently one to forty carbon atom monovalent hydrocarbon radicals, with D defined as:
• R4R5SiO2/2
• where R4 and R5 are each independently one to forty carbon atom monovalent hydrocarbon radicals, with Dvi defined as:
• Dvi=R6R7SiO2/2
• where R6 is a monovalent unsaturated hydrocarbon radical having from two to ten carbon atoms, and R7 is independently a one to forty carbon atom monovalent hydrocarbon radical with M defined as:
• M=R8R9R10SiO1/2
• with R8, R9, and R10 each independently a one to forty carbon atom monovalent hydrocarbon radical;
• and
• (2) a resin having the formula:
• (MHwQz)j
• where Q has the formula SiO4/2 and with MH defined as:
• HbR113−bSiO1/2
• where R11 is a one to forty carbon atom monovalent hydrocarbon radical where the subscript b is a number ranging from 1 to 3, with the subscripts w and z having a ratio of 0.5 to 4.0 respectively and the subscript j ranges from about 2.0 to about 100;
• wherein said hydrosilylation is conducted in the presence of
• (3) a first silicone having a viscosity below about 1,000 centistokes at 25° C.;
• thereby forming a gel;
• and
• (B) a second silicone having a viscosity below about 1,000 centistokes at 25° C. wherein said gel is slurried in said second silicone and subjected to mixing with said second silicone;
• and
• (2) a non-aqueous organic hydroxylic solvent
• wherein said non-aqueous emulsion comprises a continuous phase comprising a non-aqueous phase.

A non-aqueous emulsion of a silicone composition said composition comprising:

• (1)(A) a silicone formed by the hydrosilylation product of
• (1) a linear alkenyl stopped polyorganosiloxane having the formula:
• MviaDxDviyM2−a
• where the subscript x is a number greater than 500, the subscript y is a number ranging from zero to about 20, the subscript a is a number ranging from 0 to 2, subject to the limitation that a+y is within the range of from 1 to about 20, with Mvi defined as:
• R1R2R3SiO1/2
• where R1 is a monovalent unsaturated hydrocarbon radical having from two to ten carbon atoms, and R2and R3 are each independently one to forty carbon atom monovalent hydrocarbon radicals, with D defined as:
• R4R5SiO2/2
• where R4 and R5 are each independently one to forty carbon atom monovalent hydrocarbon radicals, with Dvi defined as:
• Dvi=R6R7SiO2/2
• where R6 is a monovalent unsaturated hydrocarbon radical having from two to ten carbon atoms, and R7 is independently a one to forty carbon atom monovalent hydrocarbon radical with M defined as:
• M=R8R9R10SiO1/2
• with R8, R9, and R10 each independently a one to forty carbon atom monovalent hydrocarbon radical;
• and
• (2) a resin having the formula:
• (MHwQz)j
• where Q has the formula SiO4/2 and with MH defined as:
• HbR113−bSiO1/2
• where R11 is a one to forty carbon atom monovalent hydrocarbon radical where the subscript b is a number ranging from 1 to 3, with the subscripts w and z having a ratio of 0.5 to 4.0 respectively and the subscript j ranges from about 2.0 to about 100;
• wherein said hydrosilylation is conducted in the presence of
• (3) a first silicone having a viscosity below about 1,000 centistokes at 25° C.
• thereby forming a gel;
• and
• (B) a second silicone having a viscosity below about 1,000 centistokes at 25° C. wherein said gel is slurried in said second silicone and subjected to mixing with said second silicone;
• producing thereby a uniform liquid comprising said second silicone and said gel whereby said uniform liquid has a viscosity ranging from 500 to 150,000 centistokes at 25° C., said uniform liquid having an initial average particle size of said gel and a particle size distribution of said gel and
• a) subjecting said uniform liquid to a pressure;
• b) subjecting said uniform liquid to a pressure drop through an orifice whereby said uniform liquid passes through said orifice wherein the initial average particle size of said gel is reduced;
• and
• c) repeating steps a) and b) whereby said particle size distribution of said gel is controlled and comprises
• d) a local maximum ranging from about 21 to about 26 microns;
• e) a local maximum ranging from about 33 to about 38 microns,
• f) and a local maximum ranging from about 50 to 60 microns;
• and
• (2) a non-aqueous organic hydroxylic solvent
• wherein said non-aqueous emulsion comprises a continuous non-aqueous phase.