Dow Corning Corporation

Avril Surgenor

Peter Cheshire Hupfield

Richard G Taylor

Stephen Westall

Binh Thanh Nguyen

Ming-Shin Tzou

Bogdan Marciniec

Ireneusz Kownacki

Timothy Rex Bunce

Agnieszka Kownacka

Jean De La Cro Habimana

David Eglin

Grainne Moloney

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 an iron-organosilicon ligand complex that can be prepared by reacting an iron carbonyl compound and an organosilicon ligand.

Hydrosilylation reaction catalysts and curable compositions and methods for their preparation and use

An organopolysiloxane containing both an amino functional organic group and a mercapto functional organic group is disclosed. A method of making such amino-mercapto functional organopolysiloxanes is by reacting (A) a silanol-functional polysiloxane, (B) an amino functional alkoxy silane, and (C) a mercapto functional alkoxy silane, via a condensation reaction. The amino-mercapto functional organopolysiloxanes products are useful in textile and fabric treatments.

Amino-mercapto functional organopolysiloxanes

An amino-functional polysiloxane is prepared by reacting an aminosilane (A) which contains an aminoalkyl group and at least one alkoxy group bonded to Si with a carboxylic acid and a silanol-functional polysiloxane (B). The aminosilane (A) is partially converted into its carboxylate salt which acts as a catalyst for the siloxane condensation polymerization reaction between (A) and (B).

Polysiloxanes and their preparation

A silane or siloxane containing at least one organic group is prepared by a hydrosilylation reaction between a silane or siloxane (A) containing at least one Si&#x2014;H group and an allyl compound (B) in the presence of a noble metal catalyst. The silane or siloxane (A) and the allyl compound (B) are fed continuously through a reaction zone which is maintained at a temperature in the range 115&#x2013;200&#xb0; C. and which is provided with heat exchanger means to dissipate the heat from the exothermic hydrosilylation reaction. The residence time of (A) and (B) in the reaction zone is less than 20 minutes.

Hydrosilylation process

Polymerization catalyst and polymerization process

A polymerization process comprising mixing a siloxane having silicon-bonded groups R&prime; and a cyclic or linear siloxane having no silicon-bonded groups R&prime; with a phosphazene base catalyst in the presence of water and allowing the siloxane having silicon-bonded groups R&prime; to condense and the cyclic or linear siloxane having no silicon-bonded R&prime; groups to polymerize by equilibration.

Polymerization of siloxanes

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Cardiff, United Kingdom

Avril Surgenor