Hydrosilylation catalyst, method for making and use

Claim 2

A colloidal hydrosilylation catalyst comprising, (A) the reaction product of (i) a silicon hydride or siloxane hydride, and (ii) a platinum Pt(O) or Pt(II) complex, and (B) 2 to 20 parts by weight of aprotic solvent, per part of (A), where there is utilized in (A), 6 to 50 moles of .tbd.SiH in (i), per mole of Pt in (ii).

Claim 3

The colloid catalyst in accordance with claim 1, resulting from the reaction of a platinum(O) complex with a silicon hydride or siloxane hydride.

Claim 4

The colloid catalyst in accordance with claim 1, resulting from the reaction of a silicon hydride or siloxane hydride with a platinum(II) complex.

Claim 5

A colloid complex in accordance with claim 1, resulting from the reaction of a platinum(O) complex with a silicon hydride or siloxane hydride having vinyl siloxane ligands.

Claim 6

A mixture comprising an olefinically unsaturated organopolysiloxane having the formula, ##STR5## and 5 parts per million to 200 parts per million of platinum in the form of colloidal hydrosilylation catalyst comprising, (A) the reaction product of (i) a silicon hydride or siloxane hydride, (ii) a platinum Pt(O) or Pt(II) complex, and (B) 2 to 20 parts by weight of aprotic solvent, per part of (A), where R is a member selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and substituted C.sub.(1-14) monovalent hydrocarbon radicals, R 1 is a C.sub.(1-10) olefinically unsaturated aliphatic radical, a is a whole number having a value of 0 to 3 inclusive and b has an average value of 0.005 to 2.0 inclusive.

Claim 7

A mixture comprising an olefinically unsaturated organopolysiloxane having the formula, ##STR5## and 5 parts per million to 200 parts per million of platinum in the form of colloidal hydrosilylation catalyst comprising, (A) the reaction product of (i) a silicon hydride or siloxane hydride, (ii) a platinum Pt(O) or Pt(II) complex, and (B) 2 to 20 parts by weight of aprotic solvent, per part of (A), where R is a member selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and substituted C.sub.(1-14) monovalent hydrocarbon radicals, R 1 is a C.sub.(1-10) olefinically unsaturated aliphatic radical, a is a whole number having a value of 0 to 3 inclusive and b has an average value of 0.005 to 2.0 inclusive.

Claim 8

A mixture in accordance with claim 5, comprising a vinyl siloxane and 5 parts per million to 200 parts per million of platinum in the form of a colloid catalyst comprising a colloidal hydrosilylation catalyst comprising: (A) the reaction product of (i) a silicon hydride or siloxane hydride, and (ii) from 6 to 50 moles of .tbd.SiH of (i) per mole of platinum in a Pt(O) or Pt(II) complex of at least one ligand selected from a member of the class consisting of phosphines, halides, C.sub.(1-8) alkyl radicals, C.sub.(6-14) aryl radicals, C.sub.(1-8) aliphatically unsaturated organic radicals, cyanide and carbon monoxide, and (B) 2 to 20 parts by weight of aprotic solvent per part of (A).