Catalyst, method of preparation, and methods involving hydrosilylation
AssigneesDow Silicones Corporation, The Board of Trustees of the University of Illinois
InventorsMatthew JELETIC, Alison WEITZEL, Ericka BRUSKE, Michael Salvatore FERRITO, Zachary WENZLICK, Kenneth ZIMMERMAN
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Abstract
A catalyst for hydrosilylation comprises a complex having a certain formula. The catalyst includes an imidazole moiety including at least one pendent substituent having a terminal ethylenic unsaturated group. A method of preparing the catalyst comprises reacting a platinum complex and an imidazole compound in the presence of a base reagent. A composition comprising the catalyst, an unsaturated compound (A), and optionally a silicon hydride compound (B) is further disclosed, along with a method of preparing a hydrosilylation reaction product.
Claims15
A catalyst for hydrosilylation, said catalyst comprising a complex having the following structure:
- wherein A is O or N;
- each R is an independently selected hydrocarbyl group;
- each R1 is an independently selected ethylenically unsaturated group;
- each R2 is an independently selected hydrocarbyl group, with the proviso that at least one of R2 includes terminal ethylenic unsaturation, with at least one of R2 having the formula —(CH2)nCH═CH2, where n is independently from 2 to 8;
- and each R3 is independently selected from H and R, with the proviso that when each R3 is R, two of R3 may be bonded together as a ring structure.
A method of preparing a catalyst for hydrosilylation, said method comprising:
- reacting a platinum complex and an imidazole compound in the presence of a base reagent to give the catalyst for hydrosilylation,
- wherein the platinum complex is of the formula:
- and
- wherein the imidazole compound is of the formula:
- wherein A is O or N;
- C− is a counterion;
- each R is an independently selected hydrocarbyl group;
- each R1 is an independently selected ethylenically unsaturated group;
- each R2 is an independently selected hydrocarbyl group, with the proviso that at least one of R2 includes terminal ethylenic unsaturation;
- and each R3 is independently selected from H and a hydrocarbyl group, with the proviso that when each R3 is a hydrocarbyl group, two of R3 may be bonded together as a ring structure.
Dependencies are inferred from the claim text.