Dow Corning Corporation

Dow Silicones Corporation

University of Illinois

Aswini K Dash

Dimitris Katsoulis

Ming-Shin Tzou

Jonathan David Wineland

Matthew J McLaughlin

Charles Alan Hall

Binh Thanh Nguyen

Richard G Taylor

Avril E Surgenor

Robert Thomas Larsen

Kurt Friedrich Brandstadt

Simon Cook

Matthew Olsen

Thomas B Rauchfuss

Kurt E Anderson

Zhanjie Li

Zhenbin Niu

David Rich

Andrew Millward

Wendy Sparschu

Ryan Gilbert Watson

Debashis Basu

Wan-Yi Chu

Ryan J Gilbert-Wilson

David A Rich

A curable polysiloxane release coating composition comprises (A) an organopolysiloxane containing at least two (2) ethylenically unsaturated groups, (B) an organopolysiloxane containing at least 2 Si&#x2014;H groups per molecule, and (C) a hydrosilylation catalyst. If the organopolysiloxane (A) contains only 2 ethylenically unsaturated groups, the organopolysiloxane (B) contains on average more than 2 Si&#x2014;H groups per molecule. The composition further comprises (D1) a hydrosilylation inhibitor comprising a maleimide of the general formula (I). In formula (I), A3? represents a hydrogen atom or a hydrocarbyl or substituted hydrocarbyl group having 1 to 18 carbon atoms, and A1? and A2? each represent a hydrogen atom or a hydrocarbyl or substituted hydrocarbyl group having 1 to 18 carbon atoms. The composition yet further comprises (D2) a second hydrosilylation inhibitor selected from acetylenic compounds, ethylenically unsaturated isocyanates, acetylenically unsaturated silanes and unsaturated dicarboxylic acid diesters or a maleate compound or a mixture thereof. 

Silicone release coating compositions

A catalyst having a specific structure and a method of preparing the catalyst is disclosed. A composition is also disclosed, which comprises: (A) an unsaturated compound including at least one aliphatically unsaturated group per molecule, subject to at least one of the following two provisos: (1) the (A) unsaturated compound also includes at least one silicon-bonded hydrogen atom per molecule; and/or (2) the composition further comprises (B) a silicon hydride compound including at least one silicon-bonded hydrogen atom per molecule. The composition further comprises (C) the catalyst. A method of preparing a hydrosilylation reaction product and a dehydrogenative silylation reaction product are also disclosed.

Catalyst and related methods involving hydrosilylation and dehydrogenative silylation

A platinum organosiloxane complex is prepared by a process including 1) combining A) a platinous halide and B) a ketone, and thereafter 2) adding C) a polyorganosiloxane having, per molecule, 2 to 4 silicon bonded terminally unsaturated hydrocarbon groups having from 2 to 6 carbon. The platinum organosiloxane complex prepared by the process is useful as a hydrosilylation catalyst.

Process for preparing platinum organosiloxane complexes

A ligand component is formed according to formula (1):RP&#x2014;X&#x2014;N&#x2550;C(R)&#x2014;Y, wherein Ris Ph or Cyc or a C-Csubstituted or unsubstituted ailkyl group; each Ph is a substituted or unsubstituted phenyl group; each Cyc is a substituted or unsubstituted cycloalkyl group; X is an unsubstituted arylene or a C-Csubstituted or unsubstituted alkylene; Ris H, methyl or Ph; and Y N is pyridyl, 6-phenylpyridyl or 6-methylpyridyl; with the proviso that when X is a Csubstituted or unsubstituted alkylene and Y is pyridyl, Ris methyl or Ph. A reaction product including the ligand component and a metal precursor is prepared by combining the ligand component with the metal precursor. An activated reaction product is formed by activating the reaction product as a hydrosilylation catalyst.

Ligand components, associated reaction products, activated reaction products, hydrosilylation catalysts and hydrosilylation curable compositions including the ligand components, and associated methods for preparing same

A composition contains (A) a hydrosilylation reaction catalyst and (B) an aliphatically unsaturated compound having an average, per molecule, of one or more aliphatically unsaturated organic groups capable of undergoing hydrosilylation reaction. The composition is capable of reacting via hydrosilylation reaction to form a reaction product, such as a silane, a gum, a gel, a rubber, or a resin. Ingredient (A) contains a metal-ligand complex that can be prepared by a method including reacting a metal precursor and a ligand.

Nickel containing hydrosilylation catalysts and compositions containing the catalysts

A composition contains (A) a hydrosilylation reaction catalyst and (B) an aliphatically unsaturated compound having an average, per molecule, of one or more aliphatically unsaturated organic groups capable of undergoing hydrosilylation reaction. The composition capable of reacting via hydrosilylation reaction to form a reaction product, such as a silane, a gum, a gel, a rubber, or a resin. Ingredient (A) contains a metal-ligand complex that can be prepared by a method including reacting a metal precursor and a ligand.

Ruthenium containing hydrosilylation catalysts and compositions containing the catalysts

A method comprises separate and consecutive steps (i) and (ii). Step (i) includes contacting a copper catalyst with hydrogen gas and a halogenated silane monomer at a temperature of 500&#xb0; C. to 1400&#xb0; C. to form a silicon-containing copper catalyst comprising at least 0.1% (w/w) of silicon. Step (ii) includes contacting the silicon-containing copper catalyst with an organohalide at a temperature of 100&#xb0; C. to 600&#xb0; C. to form a reaction product. The organohalide has formula HCX, where X is a halogen atom, subscript a is an integer of 0 or more, subscript b is an integer of 1 or more, and subscript c is an integer of 2 or more. The method produces a reaction product. The reaction product includes a halogenated silahydrocarbylene.

Method of preparing halogenated silahydrocarbylenes

Iridium containing hydrosilylation catalysts and compositions containing the catalysts

A method of preparing organohalosilanes comprising combining an organohalide having the formula RX (I), wherein R is a hydrocarbyl group having 1 to 10 carbon atoms and X is fluoro, chloro, bromo, or iodo, with a contact mass comprising at least 2% (w/w) of a palladium suicide of the formula PdSi(II), wherein x is an integer from 1 to 5 and y is 1 to 8, or a platinum suicide of formula PtSi (III), wherein z is 1 or 2, in a reactor at a temperature from 250 to 700&#xb0; C. to form an organohalosilane.

Method of preparing an organohalosilane

A process for preparing organohalosilanes comprising combining hydrogen, a halosilane having the formula HSiX(I) and an organohalide having the formula RX (II), wherein R is C-Calkyl or C-Ccycloalkyl, each X is independently halo, and the subscript a is 0, 1, or 2, in the presence of a sufficient amount of a catalyst effective in enabling the replacement of one or more of the halo groups of the halosilane with the R group from the organohalide, at a temperature from 200 to 800&#xb0; C., to form an organohalosilane and a hydrogen halide, wherein the volumetric ratio of hydrogen to halosilane is from 1:3 to 1:0.001 and the volumetric ratio of hydrogen to organohalide is from 1:1 to 1:0.001, and wherein the catalyst is optionally treated with the hydrogen or the halosilane prior to the combining.

Preparation of organohalosilanes

A method of preparing a diorganodihalosilane, the method comprising the following separate and consecutive steps: (i) treating a preformed metal silicide with a mixture comprising hydrogen gas and a silicon tetrahalide at a temperature from 300 to 1400&#xb0; C. to form a treated metal silicide, wherein the preformed metal silicide comprises a metal selected from at least one of Ni, Pd, or Pt; and (ii) reacting the treated metal silicide with an organohalide according to the formula RX at a temperature from 250 to 700&#xb0; C. to form a diorganodihalosilane, wherein R is C-Chydrocarbyl and X is halo.

Method of preparing a diorganodihalosilane

A method of making a diorganodihalosilane contacting an organotrihalosilane according to the formula RSiX(I) with hydrogen in the presence of a metal catalyst comprising at least two metals and at a temperature from 300 to 800&#xb0; C. to form a diorganodihalosilane, wherein R is C-CQ hydrocarbyl, X is halo, and two of the at least two metals are chosen from at least one of (i) copper and palladium, (ii) copper and gold, (iii) indium and iridium or (iv) iridium and rhenium.

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Midland, MI, United States of America

Aswini K Dash