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Silicone composition suitable for cross-linking by dehydrocondensation in the presence of metal catalyst

A composition and dehydrogenation technology, applied in the field of catalysis, can solve problems such as toxicity

Inactive Publication Date: 2014-02-19
BLUESTAR SILICONES FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, alkyltin based catalysts, although very effective, usually colorless, liquid and soluble in silicone oils, have the disadvantage of being toxic (CMR2, toxic for reproduction)

Method used

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  • Silicone composition suitable for cross-linking by dehydrocondensation in the presence of metal catalyst
  • Silicone composition suitable for cross-linking by dehydrocondensation in the presence of metal catalyst
  • Silicone composition suitable for cross-linking by dehydrocondensation in the presence of metal catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment

[0183] I) Preparation of catalysts (4) and (5) according to the invention

[0184] (4): [Fe(iBu-AA) 3 ], where iBu-AA=isobutyl acetoacetate anion or enolate anion of isobutyl acetoacetate,

[0185] (5): [Fe(tBu-AA) 3 ], where tBu-AA=tert-butyl acetoacetate anion or enolate anion of tert-butyl acetoacetate,

[0186] A solution of 112 mmol sodium methoxide (6 g) in 100 ml ethanol was concentrated 20% by distillation, then 112.5 mmol of β-ketoester (tert-butyl acetoacetate or isobutyl acetoacetate) was added, and the obtained solution was dissolved in Heating at 80°C for 1 hour produced a clear yellow-orange solution. A solution of 37.1 mmol of anhydrous ferric chloride (6 g) in 20 ml of ethanol was added over 30 min at 80 °C, then the mixture was heated at 80 °C for 3 h, cooled, filtered (if necessary), concentrated to dryness, And the residue was extracted with 100 ml of diisopropyl ether, and the homogeneous mixture was filtered through Celite. After evaporation to dryne...

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Abstract

A silicone composition is described that includes components having SiH / SiOH group and that can be polymerized / cross-linked by a dehydrocondensation reaction in the presence of a catalyst such as an iron-based complex or salt, requiring a low activation temperature.

Description

[0001] This divisional application is based on the division of the original Chinese patent application with the application number 201080035088.0, the application date is June 15, 2010, and the invention title is "Crosslinkable organosilicon composition by dehydrogenation condensation in the presence of a metal catalyst". case application. technical field [0002] The present invention relates to the field of catalysis enabling dehydrogenation condensation reactions for the polymerization / crosslinking of silicones. The reactive substances involved are monomers, oligomers and / or polymers of the polyorganosiloxane type. Background technique [0003] The reactive units (motifs) involved in these substances are on the one hand ≡SiH units and on the other hand ≡SiOH units. The dehydrogenative condensation between these silicone reactive units leads to the formation of ≡Si-O-Si≡ bonds and to the release of hydrogen gas. [0004] This dehydrocondensation is an alternative to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/08C08L83/04C09D183/04
CPCB01J31/2234C09D183/04C08G77/16B01J2531/842C08G77/12C08L83/04C08K5/56C08G2101/00C08L2205/02C08L83/00C08G77/08
Inventor C·马利维尔尼
Owner BLUESTAR SILICONES FRANCE SAS