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New polyether alcohols containing organosiloxane groups by using double metal cyanide and preparation method thereof

A technology of siloxane polyether and siloxane alkoxy, which is applied in the field of new polyether alcohols, can solve the problems of reducing the concentration of surface-active siloxane polyether and damaging the performance of target products, etc.

Inactive Publication Date: 2009-11-25
TH GOLDSCHMIDT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, this means that in silicone polyethers prepared according to the prior art, a relatively large amount of unreacted and rearranged excess polyether is unavoidably present, which reduces the surface activity of the silicone polyether concentration and impair the performance of the target product

Method used

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  • New polyether alcohols containing organosiloxane groups by using double metal cyanide and preparation method thereof
  • New polyether alcohols containing organosiloxane groups by using double metal cyanide and preparation method thereof
  • New polyether alcohols containing organosiloxane groups by using double metal cyanide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0111] Under nitrogen, 200.0 g of polypropylene glycol monobutyl ether (average molar mass 750 g / mol) and 0.017 g of zinc hexacyanocobaltate DMC catalyst were initially charged to a 3-liter autoclave and heated to 130° C. with stirring. The reactor was pumped down to an internal pressure of 30 mbar, so that any volatile constituents present were removed by distillation. To activate the DMC catalyst, a 50.0 g portion of propylene oxide was supplied. After 20min and reaction initiation (reactor internal pressure drop), 100.0g epoxysiloxane and 368.0g propylene oxide based on heptamethyltrisiloxane and allyl glycidyl ether were continuously Cooling, while metering in at 130° C., the internal pressure of the reactor was a maximum of 1.2 bar abs. A post-reaction was carried out at 130-150°C for 180 minutes, followed by a degassing step. In this step, volatile components such as residual propylene oxide are distilled off under reduced pressure. The colorless, low-viscosity and tr...

Embodiment 2

[0114] Under nitrogen, 200.0 g of polypropylene glycol monobutyl ether (average molar mass 750 g / mol) and 0.015 g of zinc hexacyanocobaltate DMC catalyst were initially charged to a 3-liter autoclave and heated to 130° C. with stirring. The reactor was pumped down to an internal pressure of 30 mbar, so that any volatile constituents present were removed by distillation. To activate the DMC catalyst, a 50.0 g portion of propylene oxide was supplied. After 20min and reaction initiation (reactor internal pressure drops), the 100.0g epoxysiloxane based on heptamethyltrisiloxane and allyl glycidyl ether and 463.0g 1,2-epoxybutane The homogeneous mixture, cooled continuously within 35 min, is metered in at 130° C., the internal pressure of the reactor being a maximum of 0.8 bar abs. A post-reaction was carried out at 135-150°C for 180 minutes, followed by a degassing step. In this step, volatile components such as residual 1,2-butylene oxide are distilled off under reduced pressur...

Embodiment 3

[0117] Under nitrogen, 200.0 g of polypropylene glycol monobutyl ether (average molar mass 2200 g / mol) and 0.015 g of zinc hexacyanocobaltate DMC catalyst were initially charged to a 3-liter autoclave and heated to 130° C. with stirring. The reactor was pumped down to an internal pressure of 30 mbar, so that any volatile constituents present were removed by distillation. To activate the DMC catalyst, a portion of 58.0 g of propylene oxide was supplied. After 15min and reaction initiation (reactor internal pressure drops), 6 parts of each part of 16.0g epoxysiloxane and 26.0g propylene oxide based on heptamethyltrisiloxane and allyl glycidyl ether were Cooling within 5 hours, metered in alternately at 125° C., the internal pressure of the reactor is a maximum of 1.0 bar abs. A post-reaction was performed at 125-150°C for 150 minutes, followed by a degassing step where volatile components such as residual propylene oxide were distilled off under reduced pressure. The resulting...

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Abstract

The invention discloses a new polyether alcohols containing organosiloxane groups which is prepared by using double metal cyanide (DMC) catalysts to oxyalkylate epoxide functional (poly) organosiloxanes and preparation method thereof.

Description

technical field [0001] The present invention relates to novel polyether alcohols bearing organosiloxane groups by alkoxylation of epoxy-functional (poly)organosiloxanes with DMC catalysts and to a process for their preparation. Background technique [0002] Conventional polyether alcohols (often also referred to simply as polyethers and formed primarily from propylene oxide and ethylene oxide) have been known for a long time and are produced industrially in large quantities. Conventional polyether alcohols are used in particular for the production of polyurethanes or for the production of surfactants by reaction with polyisocyanates as starting compounds. [0003] Most processes for the preparation of alkoxylation products (polyethers) use basic catalysts, such as alkali metal hydroxides and alkali metal methanolates. [0004] The use of KOH has been particularly widespread and known for many years. Typically, commonly used low molecular weight hydroxyl-functional initiato...

Claims

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Application Information

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IPC IPC(8): C08G77/46C08G77/38B01F17/54C09K23/54
CPCC08G77/46C08G65/2663C08G65/22C08G65/2609
Inventor F·舒伯特W·克诺特
Owner TH GOLDSCHMIDT AG
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