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:
Oct. 01, 2024
Filed:
Jul. 10, 2023
Dupont Specialty Materials Korea Ltd., Chungcheongnam-do, KR;
Dupont Electronic Materials International, Llc, Marlborough, MA (US);
Dupont Toray Specialty Materials Kabushiki Kaisha, Tokyo, JP;
Shunya Takeuchi, Chiba, JP;
Anna Ya Ching Feng, Taoyuan, TW;
Yutaka Oka, Chiba, JP;
Jung Hye Chae, Gyeonggi-do, KR;
DuPont Toray Specialty Materials Kabushiki Kaisha, Tokyo, JP;
DuPont Electronic Materials International, LLC, Marlborough, MA (US);
DuPont Specialty Materials Korea Ltd., Chungcheongnam-do, KR;
Abstract
A UV curable silicone composition has exceptional curability by ultraviolet irradiation. The UV curable silicone composition includes (A) an organopolysiloxane composition selected from the following: (A-1) an organopolysiloxane composition comprising a linear organopolysiloxane in which both ends of the molecular chain are capped with alkenyl groups and/or a branched organopolysiloxane containing at least 2 alkenyl groups at the ends of the molecular chain, and an organopolysiloxane containing at least 2 thiol groups in side-chains of the molecular chain, wherein the thiol group content is 1% by mass or more per molecule, (A-2) an organopolysiloxane composition comprising a linear organopolysiloxane in which both ends of the molecular chain are capped with thiol groups, wherein the thiol group content is 1% by mass or more per molecule, and an organopolysiloxane containing at least 2 alkenyl groups in side-chains of the molecular chain and/or a resinous organopolysiloxane containing at least 2 alkenyl groups at the ends of the molecular chain, or (A-3) an organopolysiloxane composition comprising an alkenyl group- and aryl group-containing organopolysiloxane and a multifunctional thiol compound, but furthermore comprising an alkenyl group-containing resinous organopolysiloxane when the multifunctional thiol compound contains only a bifunctional thiol compound, and (B) a silicone-compatible photo-initiator comprising a compound selected from the following: (B-1) an alpha-hydroxyacetophenone, (B-2) a combination of an alpha-hydroxyacetophenone and an alpha-aminoalkylphenone, or (B-3) a combination of an alpha-hydroxyacetophenone and a mono-acylphosphine oxide, wherein the ratio between the thiol groups and alkenyl groups (SH/Vi ratio) included in the organopolysiloxane composition is 0.6 or more.