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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11655341 B1

PDFFull Text
Date of Patent:
May. 23, 2023

Filed:

Sep. 28, 2018

Method for preparing a radical-polymerizable organopolysiloxane, a radiation-curable organopolysiloxane composition, and a release sheet

Applicant:

Shin-etsu Chemical Co., Ltd., Tokyo, JP;

Inventors:

Kenji Tanaka, Annaka, JP;

Shunji Aoki, Annaka, JP;

Assignee:

Shin-Etsu Chemical Co., Ltd., Tokyo, JP;

Attorney:

Rimon, P.C.

Primary Examiner:

Margaret G Moore

Int. Cl.
CPC ...
C08G 77/08 (2006.01); C09J 7/40 (2018.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/36 (2006.01); C07F 7/00 (2006.01); C07F 7/08 (2006.01); C08F 299/08 (2006.01); C08G 77/20 (2006.01); C08G 77/38 (2006.01);
U.S. Cl.
CPC ...
C08G 77/08 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/36 (2013.01); C07F 7/00 (2013.01); C07F 7/0838 (2013.01); C08F 299/08 (2013.01); C08G 77/20 (2013.01); C08G 77/38 (2013.01); C09J 7/40 (2018.01); B32B 2405/00 (2013.01);
Abstract

Provided is a method for preparing a (meth)acryloyl group-containing organopolysiloxane having a step of transesterification between the components (a1) and (a2) in the presence of the components (a3) and (a4) to obtain the (meth)acryloyl group-containing organopolysiloxane, wherein component (a1) is an organopolysiloxane represented by the average composition formula (1) which has a hydroxy group-containing group, component (a2) is a (meth)acrylic acid ester represented by the general formula (2), component (a3) is a zirconium metal complex in an amount such that a molar ratio of component (a3) to the hydroxy group of component (a1) is 0.001 to 0.1, and component (a4) is a hydroxy group-containing amine represented by HON(R)in an amount such that a molar ratio of component (a4) to component (a3) is 0.10 to 1.5, wherein Ris, independently of each other, a linear or branched aliphatic hydrocarbon group having 1 to 6 carbon atoms.

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