Novel silicone polyether copolymers and process for preparation thereof

A technology of polysiloxane polyether copolymer and polysiloxane polyether, which is applied in the field of novel polysiloxane polyether copolymer and its preparation, and can solve problems such as release

Inactive Publication Date: 2011-02-02
TH GOLDSCHMIDT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] A further disadvantage of the process technology of the method disclosed in EP-A1-0 506 086 is that hydrogen chloride is released from the alcoholic solution

Method used

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  • Novel silicone polyether copolymers and process for preparation thereof
  • Novel silicone polyether copolymers and process for preparation thereof
  • Novel silicone polyether copolymers and process for preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] Embodiment 1 (the present invention)

[0186] Into a 250 ml four-necked flask equipped with a precision glass stirrer, internal thermometer, dropping funnel and distillation apparatus was initially charged with 30 g of trimethylethoxysilane at room temperature, and 0.45 ml of trifluoroacetic acid was added with stirring. After heating to 60° C., a mixture of 37.2 g of silyl polyether SP-1 and 20.16 g of deionized water was added dropwise within 1 hour. After the dosing had ended, the cloudy reaction mixture was stirred at 60° C. for 3 hours. 3 g of sodium bicarbonate was added, and the mixture was stirred at room temperature for half an hour. After filtration through a tank filter, a clear solution was obtained. The ethanol formed in the reaction was distilled off within 45 minutes at 70° C. and 5-15 mbar. A transparent homogeneous low viscosity (29 In the Si NMR spectrum, the signal of the initial compound is no longer recognized. The ratio of M units to T units is...

Embodiment 2

[0187] Embodiment 2 (the present invention)

[0188]Into a 250 ml four-neck flask equipped with a precision glass stirrer, internal thermometer, dropping funnel and distillation apparatus was initially charged with 31.8 g of trimethylethoxysilane at room temperature, and 0.42 ml of trifluoroacetic acid was added with stirring. After heating to 60° C., a mixture of 30.0 g of silylpolyether SP-2 and 21.4 g of deionized water was added dropwise within 1.5 hours. After the dosing had ended, the cloudy reaction mixture was stirred at 60° C. for 3 hours. The ethanol formed in the reaction was distilled off within 1 hour at 60° C. and 50 mbar. 1.7 g of sodium bicarbonate was added, and the mixture was stirred at room temperature for half an hour. After filtration through a tank filter, a transparent homogeneous yellow product was obtained with a viscosity of 204 mPa*s at 25°C. exist 29 In the Si NMR spectrum, the signal of the initial compound is no longer recognized. The ratio ...

Embodiment 3

[0189] Embodiment 3 (the present invention)

[0190] Into a 250 ml four-neck flask equipped with a precision glass stirrer, internal thermometer, dropping funnel and distillation apparatus was initially charged with 21.8 g of hexamethyldisiloxane at room temperature and 0.42 ml of trifluoroacetic acid was added under stirring . After stirring at 70° C. for 1 hour, a mixture of 30.0 g of silyl polyether SP-2 and 21.4 g of deionized water was added dropwise within 1 hour. After the dosing had ended, the cloudy reaction mixture was stirred at 70° C. for 3 hours. The ethanol formed in the reaction was distilled off within 1 hour at 70° C. and 20 mbar. 1.7 g of sodium bicarbonate was added, and the mixture was stirred at room temperature for half an hour. After filtration through a tank filter, a transparent homogeneous yellow product was obtained with a viscosity of 294.2 mPa*s at 25°C.

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Abstract

The invention relates to novel silicone polyether copolymers and a process for preparation thereof. Novel silicone polyether copolymers of inverse structure of the formula 1, characterized in that no unsaturated functional groups caused by side reactions or conversion products thereof are present in the copolymer, and a process for preparation thereof, in which a polyether modified terminally and / or laterally with alkoxysilyl groups is reacted with silanes and / or siloxanes which bear one or more hydrolysis-labile groups, in a hydrolysis and condensation reaction.

Description

technical field [0001] The present invention relates to novel polysiloxane polyether copolymers and a process for their preparation, wherein a polyether modified at the end and / or at the side with alkoxysilyl groups is combined with a Reaction of silanes and / or siloxanes with at least one readily hydrolyzable group or mixtures with silanes and / or siloxanes with at least one readily hydrolyzable group and siloxanes with no readily hydrolyzable groups react. Background technique [0002] The compounds according to the invention constitute a new class of polysiloxane-polyether copolymers in which the linkage of the siloxane host to the polyether takes place via hydrolytically-stabilized SiC bonds. The novel compounds are referred to below as polysiloxane-polyether copolymers, even though in some cases the structure does not include the characteristics of polyethers and / or polysiloxanes in the customary sense. However, the structural correlation of the polyether building block...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/336C08L83/12C08G77/46
CPCC08G77/80C08G77/48C08G77/18C08G77/46C08L83/12C08G77/445
Inventor F·亨宁F·舒伯特W·克诺特H·杜齐克
Owner TH GOLDSCHMIDT AG
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