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:
Jul. 03, 2018
Filed:
Jul. 27, 2015
Sumitomo Chemical Company, Limited, Chuo-ku, Tokyo, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
A silicone-based encapsulating material composition contains a bifunctional thermosetting silicone resin (A), a multifunctional thermosetting silicone resin having a hydroxyl group (B), and a curing catalyst (C). In the composition, a weight-average molecular weight of the component (A) is 300 to 4,500, a mass ratio of the component (B) relative to a total mass of the component (A) and the component (B) is 0.5% by mass or more and less than 100% by mass, an average functional number of the component (B) is 2.5 to 3.5, and the repeating units constituting the component (B) which are trifunctional account for 50% by mass or more relative to a total mass of the component (B). A visible light transmittance measured at an optical path length of 1 cm and a wavelength of 600 nm is 70% or higher.