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Process for preparing a storage-stable silicone resin

A storage-stable, silicone-based technology, applied in coatings and other directions, which can solve problems such as cost impact, operator health and safety risks, untimely condensation of silicone resin gelation, etc., to achieve a simplified method, no health and safety risks , the effect of no environmental risk

Active Publication Date: 2017-12-01
ELKEM SILICONES FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it has many disadvantages, that is, the continuous release of gaseous hydrochloric acid requires the use of devices capable of absorbing the gaseous hydrochloric acid, which brings economic impact, and the untimely leakage of gaseous hydrochloric acid will affect the health and safety of operators. security poses serious risks
Furthermore, due to the approximately 45% solubility of isopropyl ether in water at 20°C in the presence of 40% hydrochloric acid, said water needs to be treated before possible recycling, which again has an impact on costs
It is also necessary to use olefin-free isopropyl ethers, since olefins can react with hydrochloric acid to form chloroalkanes, which can lead to untimely condensation of silanol units and thus gelation of the silicone resin
This requires the use of purified isopropyl ether, which again has an impact on costs

Method used

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  • Process for preparing a storage-stable silicone resin
  • Process for preparing a storage-stable silicone resin
  • Process for preparing a storage-stable silicone resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0171] A) Raw materials used:

[0172] - Chlorotrimethylsilane from the company Sigma-Aldrich.

[0173] -Dimethyldichlorosilane from the company Sigma-Aldrich.

[0174] -Methyltrichlorosilane from the company Sigma-Aldrich.

[0175] - Soften water.

[0176] - AH: Toluene from the company VWR International: Normapur grade.

[0177] - CA: Aqueous hydrochloric acid (-37 or 33% by weight) from VWR International.

[0178] -Organic compound O: Dehysol R B35 from BTC Corporation: 2-ethylhexyl ester of epoxidized fatty acid (CAS68082-34-8).

[0179] For all examples, the term "neutral pH" means a pH of 7 (pH paper accuracy).

[0180] B) Preparation of mixture X according to the invention

[0181] 1. Mixtures X1 according to the invention

[0182] According to the direct hydrolysis method, a chlorosilane mixture consisting of 4.38 g of chlorotrimethylsilane, 8.55 g of dimethyldichlorosilane, and 26.95 g of methyltrichlorosilane was added dropwise to the stirred reactor under a...

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Abstract

The invention relates to a process for preparing a storage-stable mixture comprising an MDT silicone resin containing hydroxyl groups and an organic compound that contains at least one epoxy group.

Description

technical field [0001] The present invention is in the field of processes for the preparation of organosilicon compounds and in particular organosilicon resins. Background technique [0002] Silicone resins are widely used in commercial products. In particular, MDT silicone resins having hydroxyl groups are used for waterproofing of stone, concrete, mortier, brick, tile, wood and other types of porous building materials and buildings. These porous materials are moisture sensitive. [0003] Silicone resins can be prepared by direct or reverse hydrolysis of chlorosilanes via processes which may be continuous or discontinuous. [0004] The term "direct hydrolysis" refers here to hydrolysis by adding the chlorosilane mixture to an aqueous medium. [0005] The term "reverse hydrolysis" refers here to hydrolysis by adding the aqueous phase to the chlorosilane mixture. [0006] The terms "discontinuous process" or "batch process" here mean a process in which different steps fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/1515C08L83/06C09D183/04C08G77/06
CPCC08G77/06C08K5/1515C09D183/04C08L83/06C04B41/009C04B41/4961C08G77/16C08L2666/28C04B14/28C04B41/4853
Inventor J-L·罗卡-奥尔泰加M·布斯基耶H·帕里索特F·迪藩
Owner ELKEM SILICONES FRANCE SAS
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