Title:
METHOD FOR PRODUCING CATIONICALLY POLYMERIZABLE ORGANOPOLYSILOXANE, HEAVY-RELEASE ADDITIVE, REMOVABLE RADIATION-CURABLE SILICONE COMPOSITION, RELEASE SHEET, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/216141
Kind Code:
A1
Abstract:
A cationically polymerizable organopolysiloxane obtained by: incorporating an alkenylated epoxy compound (a4) in the presence of a cyano-group-containing organic compound (a3) either into a condensate obtained by subjecting both an organopolysiloxane resin (a1) comprising Q units and M units as major components, having an M/Q molar ratio of 0.6-1.2, and having an SiOH group content of 0-1.2 mass% and an organohydrogen(poly)siloxane (a2) to condensation with dehydrogenation in the presence or absence of the compound (a3) or into a mixture of the ingredients (a1) and (a2); and causing the SiH groups in the condensate and/or ingredient (a2) to undergo an addition reaction with the alkenyl groups contained in the ingredient (a4). This cationically polymerizable organopolysiloxane has a higher heavy-release effect than conventional cationically polymerizable organopolysiloxanes, can be inhibited from increasing in viscosity or gelling, and hence is suitable for use as a heavy-release additive for release sheets.
Inventors:
TANAKA KENJI (JP)
AOKI SHUNJI (JP)
AOKI SHUNJI (JP)
Application Number:
PCT/JP2019/016482
Publication Date:
November 14, 2019
Filing Date:
April 17, 2019
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C08G59/02; C08G77/38; C09K3/00; C09J5/00
Foreign References:
| JPH11228702A | 1999-08-24 | |||
| JP2000103859A | 2000-04-11 | |||
| JP2008195931A | 2008-08-28 | |||
| JP2004068000A | 2004-03-04 | |||
| JPH10182826A | 1998-07-07 | |||
| JP2002241504A | 2002-08-28 | |||
| JPH06166740A | 1994-06-14 | |||
| JP2012041381A | 2012-03-01 |
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (JP)
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