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Cobalt compound useful as catalyst for hydrosilylation, dehydrogenative silylation and crosslinking of silicone compositions

A technology of hydrosilyl functional compounds, applied in the field of new catalysts, which can solve the problems of undescribed catalyst activity, etc.

Active Publication Date: 2019-09-13
ELKEM SILICONES FRANCE SAS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent application US20140231702 discloses reaction products of ligands and cobalt precursors as hydrosilylation catalysts, but does not describe the activity of these catalysts

Method used

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  • Cobalt compound useful as catalyst for hydrosilylation, dehydrogenative silylation and crosslinking of silicone compositions
  • Cobalt compound useful as catalyst for hydrosilylation, dehydrogenative silylation and crosslinking of silicone compositions
  • Cobalt compound useful as catalyst for hydrosilylation, dehydrogenative silylation and crosslinking of silicone compositions

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Embodiment

[0295] reagent

[0296] a) Octene derived from A-1 Alfa Aesar: 97% purity.

[0297] A-2 Divinyltetramethylsiloxane (DVTMS) with 1.073 mol of silicon-bonded vinyl groups per 100 g of DVTMS. A-3 Type M vi D 70 M vi The organopolysiloxane has 0.038 mol of silicon-bonded vinyl groups per 100 g, where: Vi: vinyl; M vi:(CH 3 ) 2 ViSiO 1 / 2 And D:(CH 3 ) 2 SiO 2 / 2 .

[0298] b) Organohydrogenpolysiloxane of formula MD'M of B-1, wherein M:(CH 3 ) 3 SiO 1 / 2 ; and D':(CH 3 )HSiO 2 / 2 .

[0299] B-2 Average MD' 50 Organohydrogenpolysiloxanes of M wherein M and D' are as described above.

[0300] B-3 An organohydrogenpolysiloxane composed of units M, M', D and D', in which the SiH content is about 20% by mass.

[0301] c) Cobalt compounds of the formula:

[0302] (C-1) Formula [Co(N(SiMe 3 ) 2 ) 2 ] 2 bis(trimethylsilyl) cobalt amide, a commercial product, supplier: Strem, purity 98%. (C-2) Cobalt bis(trimethylsilyl)amide, by CoCl 2 and LiN (SiMe 3 ) 2 Synthesi...

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Abstract

The subject of the present invention is the use, as hydrosilylation and / or dehydrogenative silylation catalyst, of a cobalt compound of formula (1): [CO(N(SiR3)2)x]y in which: the R symbols, which areidentical or different, represent a hydrogen atom or a hydrocarbon-based radical having from 1 to 12 carbon atoms, and preferably the R symbols, which are identical or different, are chosen from thegroup consisting of: a hydrogen atom, alkyl groups having from 1 to 8 carbon atoms and aryl groups having from 6 to 12 carbon atoms, -x=1, 2 or 3 and -y=1 or 2.

Description

technical field [0001] The field of the invention is that of reactions between unsaturated compounds and compounds containing at least one hydrogen atom bonded to a silicon atom. This may involve hydrosilylation reactions and / or dehydrosilylation reactions also known as polyadditions. The present invention relates to the use of novel catalysts for these reactions. More specifically, the present invention relates to the use of cobalt compounds as hydrosilylation and / or dehydrosilylation catalysts. These catalysts also enable curing of the silicone composition by crosslinking it. Background technique [0002] During a hydrosilylation (also known as polyaddition) reaction, a compound containing at least one degree of unsaturation is reacted with a compound containing at least one hydrosilyl functional group (ie, a hydrogen atom bonded to a silicon atom). Such a reaction can be described, for example, by the following reaction equation: In the case of an ethylenic type of uns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/08C08L83/04
CPCC08G77/08C08L83/04C08L83/00C08K5/0091C08G77/12C08K5/5353C08K5/5357B01J31/1608B01J31/1805B01J2231/323B01J2531/845C08L2312/08
Inventor M·波斯盖V·蒙特尔J·雷纳德M·普雷特
Owner ELKEM SILICONES FRANCE SAS