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Novel polyethersiloxanes carrying alkoxysilyl groups and method for the production thereof

A technology of alkoxysilyl and alkoxysilyl functions, applied in the field of new polyether-siloxane with alkoxysilyl and its preparation, can solve the problem of no surfactant performance And other issues

Inactive Publication Date: 2011-10-05
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] To date there is no product combining the valuable surfactant properties of polyether-siloxanes with reactive, crosslinkable alkoxysilyl compounds

Method used

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  • Novel polyethersiloxanes carrying alkoxysilyl groups and method for the production thereof
  • Novel polyethersiloxanes carrying alkoxysilyl groups and method for the production thereof
  • Novel polyethersiloxanes carrying alkoxysilyl groups and method for the production thereof

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preparation example Construction

[0085] The invention also provides the following process for preparing alkoxysilyl-functionalized polyether-siloxanes, which are processed to give a siloxane backbone.

[0086] Alkoxysilyl-functionalized polyether-siloxanes and their mixtures can be prepared by two different methods:

[0087] 1) alkoxylation of polysiloxane-polyether copolymers or polysiloxanes with epoxy-functionalized alkoxysilanes using double metal cyanide catalysts,

[0088] and / or

[0089] 2) Hydrosilylation coupling of unsaturated polyethers bearing alkoxysilyl groups, which are alkane functionalized by epoxy using DMC catalysts Oxysilanes are obtained beforehand by alkoxylation of the corresponding unsaturated starter compounds.

[0090] These two methods can be carried out independently of each other, but also sequentially in a desired manner.

[0091] These two methods are described in detail below.

[0092] 1) Polysiloxane- Alkoxylation of polyether copolymers or polysiloxanes

[0093] Th...

Embodiment 11

[0200] As a chain initiator, use has the structure k=27, l 3 =5, l 4 =o=0, X=X 6 =Methyl polyether-siloxanes of the formula (IX) used in excess according to the prior art with an average molar mass of 800 g / mol and containing 64% by weight of ethylene oxide units and 36% by weight of propylene oxide OH-terminated allyl polyethers of the units, previously prepared by hydrosilylation of hydrogen siloxanes.

[0201] Under nitrogen, 550 g of this polyether-siloxane and 0.071 g of zinc hexacyanocobaltate DMC catalyst were 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 40.0 g portion of propylene oxide was added. After 15 minutes and reaction start (decrease in reactor internal pressure), 166.8 g of 3-glycidyloxypropyltriethyl was added continuously within 1 hour at 130° C. and a maximum react...

Embodiment 12

[0204] As a chain initiator, use has the structure k=25, l 3 = l 4 =o=0, X=methyl, X 6 =-(CH 2 ) 6 -OH linear polyether-siloxanes of the formula (IX), which were previously prepared by hydrosilylation of hydrogen siloxanes using hexenol according to the prior art.

[0205] Under nitrogen, 200 g of this polyether-siloxane and 0.027 g of zinc hexacyanocobaltate DMC catalyst were added to a 1 liter glass flask with a reflux condenser 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 first portion of 10.0 g of 3-glycidyloxypropyltriethoxysilane (DYNASYLAN GLYEO). After 15 minutes, 88.4 g of DYNASYLAN was added continuously over 1.5 hours at 130°C GLYEO. Then, 28.8 g of 1,2-epoxybutane were added within 1.5 hours at 130° C. under gentle reflux. After 1 hour post reaction all the butylene oxide had reacted and no refl...

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Abstract

The invention relates to alkoxysilyl-functional polyethersiloxanes and to a method for the production thereof by a noble-metal-catalyzed SiC bonding of hydrosiloxanes comprising SiH groups with unsaturated polyethers carrying alkoxysilyl groups or by alkoxylating polyethersiloxanes or polysiloxanes with epoxy-functional alkoxysilanes in the presence of double metal cyanide catalysts.

Description

technical field [0001] The present invention relates to novel polyether-siloxanes with alkoxysilyl groups and a process for their preparation by making polysiloxane-polysiloxanes Ethers are alkoxylated or hydrosilylated via ethylenically unsaturated polyethers with alkoxysilyl groups to siloxanes with Si—H groups. Background technique [0002] Polysiloxane-polyether copolymers, also known as polyether-siloxanes or simply polysiloxane-polyethers, are a class of substances that can be used in various industrial applications, for example, as surfactants , emulsifier, wetting additive and dispersant, surface coating leveler, lubricant, used as an auxiliary for tertiary oil recovery, used as a textile auxiliary for softening fibers, yarns or sheet-like textile products, used as a defoamer , used as a cosmetic additive (emulsifier) ​​and as a foam stabilizer, especially in polyurethane foams. [0003] Polyether-siloxanes are useful in the various applications mentioned above, si...

Claims

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Application Information

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IPC IPC(8): C08G77/18C08G77/46C08L83/12
CPCC08G77/18C08G77/46C08L83/12
Inventor F·舒伯特F·亨宁W·克诺特
Owner EVONIK DEGUSSA GMBH
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