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Functionalisation (epoxidation) of silicones and use of said silicones as non-stick coatings

A technology of organosilicon compound and functionalization, applied in the direction of organic chemistry, silicon organic compounds, chemical instruments and methods, etc., can solve the problems of unrealistic economy, high cost of catalytic complexes, high cost of industrial implementation, etc.

Inactive Publication Date: 2011-04-06
法国蓝星硅酮有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such cases, the silicone oil requires additional filtration and purification steps to make it usable in the field of transparent films after crosslinking; these additional steps make industrial implementation expensive and therefore economically impractical
[0021] Finally, the catalytic complexes used in these proposals have the disadvantage of being expensive

Method used

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  • Functionalisation (epoxidation) of silicones and use of said silicones as non-stick coatings
  • Functionalisation (epoxidation) of silicones and use of said silicones as non-stick coatings
  • Functionalisation (epoxidation) of silicones and use of said silicones as non-stick coatings

Examples

Experimental program
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Embodiment Construction

[0123] The 4-vinylcyclohexene epoxide (VCMX) used in the following examples was from Union Carbide. It is systematically distilled before use.

[0124] Tetramethylhydrogendisiloxane used (M' 2 ) are manufactured by Rhodia Silicones. It is also distilled itself before use.

[0125] Pt-coated carbon black catalyst (wet) was purchased from Aldrich Company under designation 33015-9. The content of platinum was 2.5 wt%. The water content is about 50 wt%.

[0126] The functionalization assistant used was sodium bicarbonate (NaHCO 3 ).

[0127] Catalyst, NaHCO 3 and the amount of water relative to VCMX and M’ 2 expressed in terms of the total quality.

[0128] The epoxide functional groups are measured by means of potentiometric methods. The equipment used was a DL21 Mettler Apparatus equipped with Mettler Toledo DG 113 SC LiCl / EtOH, 1.0 M, combined electrodes. The titration solution was 0.1N perchloric acid in acetic acid.

[0129] General operating procedures for Exam...

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Abstract

The invention relates to a method of preparing epoxidized POSs using a platinum-catalyzed hydrosilylation reaction between ethylenically unsaturated epoxides, such as VCMX, and a hydrogenated POS of the MDD'M type with M = R3-SiO1 / 2, D = R2-SiO2 / 2, D' = RH-SiO2 / 2, wherein R = alkyl. The aim of the invention is to propose a method for the synthesis of epoxidized POS silicones by means of heterogeneous catalysis, which can be used to control and optimize the viscosity of the end product, i.e. to limit parasitic cationic polymerisation reactions caused by the opening of heterocylces, which can produce the partial or total gelling of the reaction mixture. Said aim is achieved by the invention which is characterized in that the hydrosilylation is performed in the presence of at least one inorganic non-nucleophilic base (NaHCO3) and, optionally, water.

Description

technical field [0001] The field of the invention relates to the field of preparation of functionalized organosilicon compounds. These organosilicon compounds are, in particular, organosilanes and polyorganosiloxanes (POS) to which functional groups, for example, groups bearing at least one epoxy function, are grafted. Background technique [0002] One of the purposes of the functionalization of silicones formed from POS oils is to improve their ability to attach to supports, be they made of paper or the like, polymeric supports, glass supports or metal supports. Thus, epoxy-functional silicone oils can be advantageously used as release coatings for flexible supports, such as those made of paper or polymer films, or as lubricants. [0003] The grafting reaction of these functional groups is carried out using precursors which may be ≡Si-H units bearing at least one, preferably ethylenic, unsaturation and capable of reacting with organohydridosilanes and / or hydrogenated POS ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C07F7/08C07F7/18
CPCC07F7/0879C08G77/38
Inventor J-P・德拉尔谢S・布罗伊尼希S・斯特兰
Owner 法国蓝星硅酮有限公司
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