Title:
PROCESS FOR PRODUCING SOLVENT-SOLUBLE REACTIVE POLYSILOXANES
Document Type and Number:
WIPO Patent Application WO/2012/090707
Kind Code:
A1
Abstract:
A process for producing solvent-soluble polysiloxanes which includes a condensation step of subjecting a raw material having siloxane-bond-forming groups to hydrolytic copolycondesation in the presence of a catalyst to synthesize a reactive polysiloxane represented by general formula (1), said raw material comprising both an organosilicon compound (S1) that has a (meth)acryloyl group and siloxane-bond-forming groups and at least one silicon compound (S2) selected from among tetraalkoxysilanes and tetrahalogenosilanes, wherein in the condensation step, the organosilicon compound (S1) and the silicon compound (S2) are used at a (S2)/(S1) molar ratio of 1.8 or less, and the condensation step is conducted by adding gradually a mixture of the silicon compound (S2) and the catalyst to a raw material fluid that comprises the organosilicon compound (S1) and water, while keeping the molar ratio of the amount of the silicon compound (S2) used to the amount of the organosilicon compound (S1) used within the range of 0.001/min to 0.3/min.
Inventors:
KITAMURA AKINORI (JP)
FURUTA NAOMASA (JP)
SUZUKI HIROSHI (JP)
FURUTA NAOMASA (JP)
SUZUKI HIROSHI (JP)
Application Number:
PCT/JP2011/078907
Publication Date:
July 05, 2012
Filing Date:
December 14, 2011
Export Citation:
Assignee:
TOAGOSEI CO LTD (JP)
KITAMURA AKINORI (JP)
FURUTA NAOMASA (JP)
SUZUKI HIROSHI (JP)
KITAMURA AKINORI (JP)
FURUTA NAOMASA (JP)
SUZUKI HIROSHI (JP)
International Classes:
C08G77/20; C08G77/06
Domestic Patent References:
| WO2009131038A1 | 2009-10-29 |
Foreign References:
| JPH02281041A | 1990-11-16 | |||
| JPS61195129A | 1986-08-29 |
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Claims:
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