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Method for preventing polymerization of unsaturated organosilicon compounds

An organic silicon compound, unsaturated technology, applied in the direction of silicon organic compounds, organic chemistry, chemical instruments and methods, etc.

Inactive Publication Date: 2011-06-08
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage here is the use of unconventional alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0050] Methacryloxymethyldimethoxymethylsilane stabilized with 200 ppm of BHT and 200 ppm of phenothiazine (containing 3500 ppm crude batch of KOH). After 180 minutes the product gelled.

Embodiment 5

[0056] Methacryloxymethyldimethoxymethylsilane stabilized with 200 ppm of BHT and 200 ppm of phenothiazine (with methanesulfonate) was heated in air at 150 °C in a glass flask without stainless steel wool. acid neutralization). After 7 hours the product gelled.

Embodiment 7

[0060] Example 7: Production in enamelled containers

[0061] Preparation of methacryloxymethyldimethoxymethylsilane from 200 kg of chloromethyldimethoxymethylsilane and potassium methacrylate in an enameled stirred vessel as described in DE 101,18,489 C1 Coarse batch.

[0062] Polymer formation was checked as follows:

[0063] 1.5ml of methacryloylsilane was placed in a 20ml open bottle, then 6ml of isohexane was added thereto, and 6ml of water was added as a layer below the mixture. Close the bottle and shake. After phase separation, the biphasic solution remained clear.

[0064] A crude batch of 3 liters was purified in a glass short path still (type) (80° C., 0.2 mbar). The bottom is homogeneous and has low viscosity.

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PUM

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Abstract

The object of the invention is a method for preventing the polymerization in the production or handling of unsaturated organosilicon compounds (S) of the general formula (1) H2C=C(R1) [C(O)O]w(O)x-(R2)y-Si(R3)z(OR4)3-z (1), where R1, R2, R3, R4, w, x, y and z have the definitions indicated in claim 1, wherein at least one step in the production or handling is carried out in a technical system (A), the surfaces thereof that come into contact with the organosilicon compounds (S) being made of at least 70% non-ferrous material, wherein a material is identified as non-ferrous if it contains less than 1 wt.-% iron, wherein the technical system (A) represents either a system for a batch process with a fill volume of at least 200L or a system for a continuous process with a throughput of at least 15L / h.

Description

technical field [0001] The present invention relates to an industrial process for preventing the polymerization of unsaturated organosilicon compounds when preparing or handling them. Background technique [0002] Organosilicon compounds with unsaturated organic functional groups such as vinyl, acryloyl or methacryloyl groups are widely used as adhesives between inorganic and organic materials, for example, for glass fiber sizing, in organic polymerization It can be used as a cross-linking agent in materials or for the treatment of fillers. [0003] Methods for preparing such compounds include, for example, reactions catalyzed by metal compounds between silanes having SiH bonds and polyunsaturated organic compounds. Another conventional route is the reaction of chloroalkylsilanes and alkali metal (meth)acrylates. All of these processes are performed exothermically at elevated temperatures. There is therefore a risk during the reaction that the product polymerizes via the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18C07F7/08C07F7/20
CPCC07F7/1892C07F7/083C07F7/18C07F7/08C07F7/20
Inventor 沃尔夫冈·齐切福尔克尔·斯坦耶克
Owner WACKER CHEM GMBH