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Process for preparing silicone polyethers

A technology of siloxane polyether and base hydrogen siloxane is applied in the field of preparing siloxane polyether and can solve the problems of product quality and performance limitation and the like

Active Publication Date: 2009-03-18
DOW SILICONES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Product quality and performance are limited in some applications due to the impossibility of separating the silicone polyether product from the unreacted unsaturated polyether starting material

Method used

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Embodiment 3

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Abstract

A process is disclosed for the preparing silicone polyethers by reacting; (A) a polyether having at least one terminally unsaturated aliphatic hydrocarbon group and an alkali metal content of less than 50 ppm, (B) an organohydrogensiloxane having an acid number of less than 0.005, via a hydrosilylation reaction. The process is particularly useful to prepare silicone polyethers of improved quality via a continuous process.

Description

[0001] Cross References to Related Applications [0001] This application claims the benefit of US Patent Application Serial No. 60 / 788085, filed March 31, 2006, under 35.U.S.C. §119(e). technical field [0002] The present invention relates to a process for the preparation of silicone polyethers. The method can be used to prepare silicone polyethers of improved quality, for example those having a -SiOC- content of less than 1 mol %, and the method is especially useful when used in a continuous process. Background technique [0003] Silicone polyethers (SPEs) are widely used in various surfactant applications, for example in the production of polyurethane foams, and as ingredients in personal care products. SPEs are typically based on copolymer structures of polyorganosiloxanes with pendant polyoxyalkylene groups. Most commonly, the copolymer structure of silicone polyether is "rake type", in which the "main chain" of the copolymer structure is provided mainly by linear po...

Claims

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Application Information

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IPC IPC(8): C08G77/14C08G77/46
CPCC08G77/46
Inventor T·奥伯黑尔曼C·尼尔S·帕斯利B·迪思田中欣之
Owner DOW SILICONES CORP
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