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Mercapto silane

A technology of mercaptosilane and group, applied in the field of mercaptosilane, can solve the problems of impossible to omit mercaptosilane, short mixing time, etc.

Active Publication Date: 2006-07-26
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From an economical and technological point of view, however, short mixing times are essential, so far it has not been possible to omit the use of completely methoxy- and / or ethoxy-substituted mercaptosilanes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0537] Weigh 59.63g (0.25mol) of 3-mercaptopropyltriethoxysilane (VP Si 263, available from Degussa AG), 212.92g (0.50mol) of ethoxylated alcohol R 1 H, where R 5 Is CH 2 -CH 2 , R 6 It is an unsubstituted monovalent alkyl group containing 13 carbon atoms with an average m of 5 (Lutensol TO5, available from BASF AG), and 30μl of titanium tetrabutoxide, and placed in a 500ml four-necked flask at room temperature under a nitrogen atmosphere , It is equipped with distillation bridge, KPG stirrer and thermometer. The mixture was heated to 140°C. The ethanol formed is continuously distilled off. After 35 minutes, the reduced pressure was adjusted to 640 mbar and reduced to 50 mbar over the course of 3 hours. The reaction was terminated after 3 hours and 35 minutes. Obtained 245.37 g (98.6%) of turbid and light yellow product. by 1 The H-NMR spectrum gave an average transesterification degree of 2.0. by 13 C-NMR can determine the distribution of long-chain branched alkyl polyethers on S...

Embodiment 2

[0538] Example 2 (comparative example)

[0539] Weigh 2,925.3g of 3-mercaptopropyltriethoxysilane, 4,753.4g of an alcohol mixture containing 72% dodecanol and 28% tetradecanol, and 30μl of titanium tetrabutoxide, and place them at room temperature under a nitrogen atmosphere. Put it into a 4l four-necked flask equipped with distillation bridge, KPG stirrer and thermometer. The mixture was heated to 110°C. The ethanol formed is continuously distilled off. After 2 hours, the reduced pressure was continuously reduced to 50 mbar during the course of 3 hours. When 1,140 ml of ethanol was removed from the reaction mixture, the reaction was terminated. 6.47 kg (98.6%) of light yellow liquid was obtained. by 1 The H-NMR spectrum gave an average transesterification degree of 2.0.

Embodiment 3

[0540] Example 3 (comparative example)

[0541] Weigh 150.02g (0.63mol) of 3-mercaptopropyltriethoxysilane, 151.2g (1.26mol) of diethylene glycol monomethyl ether and 75μl of titanium tetrabutoxide, and put them in a nitrogen atmosphere at room temperature In a 500ml three-necked flask, it is equipped with an enhanced condenser, a stirrer and a thermometer. The mixture was heated to 80°C. The ethanol formed was removed under a reduced pressure of 3 mbar.

[0542] The reaction was terminated after 8 hours. Obtained 237.84 g (97.6%) of a clear and light yellow product. by 1 The H-NMR spectrum gave an average transesterification degree of 2.0.

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Abstract

The invention relates to mercaptosilane of the general formula I, wherein R<1> is an alkyl polyether group -O-(R<5>-O)-R<6>. They are prepared by a procedure in which a silane of the general formula II is subjected to a catalytic reaction with an alkyl polyether R<1>-H with the same specification as the above, R<7>-OH being split off, the molar ratio of the alkyl polyether R<1>-H to the silane of the general formula II is at least 0.5 and R<7>-OH is separated off from the reaction mixture continuously or discontinuously. They can be used in shaped articles.

Description

Technical field [0001] The present invention relates to mercaptosilane, its preparation method and use. Background technique [0002] It is known to use silanes as adhesion promoters. Therefore, between inorganic materials and organic materials, aminoalkyltrialkoxysilanes, methacryloxyalkyltrialkoxysilanes, polysulfanalkyltrialkoxysilanes, and mercaptoalkyltrialkoxysilanes are used. Alkoxysilane acts as an adhesion promoter, as a crosslinking agent, and as a surface modifier (EP Plueddemann, "Silane Coupling Agents", 2nd ed. Plenum Press 1982). [0003] These adhesion promoters or coupling agents or adhesives form a bond to both the filler and the elastomer, and thereby achieve good interaction between the filler surface and the elastomer. [0004] It is also known that the use of commercially available silane adhesion promoters having three alkoxy substituents on the silicon atom releases a large amount of alcohol during and after the filler adhesion. Because trimethoxy-substitu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18
CPCY02T10/862
Inventor 奥利弗·克洛克曼菲利普·阿尔贝特安德烈·哈塞卡斯滕·科尔特雷蒙德·彼得
Owner EVONIK OPERATIONS GMBH
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