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1. BRPI0520407 - PROCESSO PARA A SÍNTESE DE DIORGANOSSILANOS POR DESPROPORCIONAÇÃO DE HIDRIDOSSILOXANOS

Office Brazil
Application Number PI0520407-0
Application Date 29.08.2005
Publication Number PI0520407
Publication Date 05.05.2009
Publication Kind A2
IPC
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
77
Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon
04
Polysiloxanes
12
containing silicon bound to hydrogen
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
77
Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon
04
Polysiloxanes
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
77
Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon
04
Polysiloxanes
06
Preparatory processes
08
characterised by the catalysts used
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
F
ACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
7
Compounds containing elements of the 4th Group of the Periodic System
02
Silicon compounds
08
Compounds having one or more C-Si linkages
C08G 77/12
C08G 77/04
C08G 77/08
C07F 7/08
Applicants MOMENTIVE PERFORMANCE MATERIALS INC.
Inventors JAMES ANTHONY CELLA
JULIAN CHOJNOWSKI
WITOLD FORTUNIAK
JAN KURJATA
SLAWOMIR RUBINSZRAJN
Agents Ricardo Pinho
Priority Data P-376014 30.06.2005 PL
11185466 20.07.2005 US
Title
(PT) PROCESSO PARA A SÍNTESE DE DIORGANOSSILANOS POR DESPROPORCIONAÇÃO DE HIDRIDOSSILOXANOS
Abstract
(PT)
PROCESSO PARA A SÍNTESE DE DIORGANOSSILANOS POR DESPROPORCIONAÇÃO DE HIDRIDOSSILOXANOS. A presente invenção fornece um novo método para o preparo de diorganossilanos pela desproporcionação de didridossiloxanos compreendendo pelo menos um grupo SiH terminal e pelo menos uma ligação siloxano na presença de catalisadores de ácido de Lewis. A reação é tanto seletiva e ocorre sob condições brandas. O triarilborano, tris(pentafluorfenil)borano, é especialmente adequado para uso como um catalisador na reação. Catalisadores orgânicos tais como tris(pentafluorfenii)borano são tipicamente preferidos, devido à sua maior solubilidade e estabilidade na mistura reacional, em relação a catalisadores de ácido de Lewis inorgânicos. O produto, diorganossilano, pode ser isolado da mistura de produto por técnicas convencionais tais como destilação.