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.:
Date of Patent:
Dec. 23, 2025
Filed:
Aug. 11, 2020
Dow Toray Co., Ltd., Tokyo, JP;
DOW TORAY CO., LTD., Tokyo, JP;
Abstract
Provided is a curing reactive organopolysiloxane composition that forms a pressure-sensitive adhesive layer having practically sufficient curability and pressure-sensitive adhesive strength, and a relatively high shear storage elastic modulus and tensile stress at 500% strain. The organopolysiloxane composition comprises: (A) a chain organopolysiloxane having a content of vinyl portions in alkenyl groups within a range of 0.02 to 0.30 mass %; (B) an organopolysiloxane resin having a content of hydroxyl groups and the like of 9 mol % or less, and a molecular weight of 4500 or more; (C) an organohydrogenpolysiloxane; and (D) a hydrosilylation reaction catalyst. A mass ratio of a resin component to a chain siloxane component is within a range of 1.4 to 3.0. A pressure-sensitive adhesive layer obtained by curing the organopolysiloxane composition has a shear storage elastic modulus G' at 25° C. of 1.0 MPa or more and a stress at 500% strain of 0.50 MPa or more.