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:
Apr. 25, 2023
Filed:
Dec. 21, 2020
Dupont Toray Specialty Materials Kabushiki Kaisha, Tokyo, JP;
Sosuke Yamaguchi, Chiba, JP;
Abstract
A white curable silicone composition provides excellent elongation characteristics while providing sufficiently great hardness, which as a result can provide a cured product having excellent toughness. The composition comprises: (A) alkenyl group-containing resinous organopolysiloxane which is represented by an average composition formula: (RSiO)(RSiO)(RSiO)(SiO)(XO), where, in the formula, Rare each independently a monovalent hydrocarbon group, while at least two Rare alkenyl groups, X is a hydrogen atom or an alkyl group, 0≤a≤0.7, 0≤b≤0.2, 0≤c≤0.3, 0≤d≤0.8, and 0≤e≤0.2, a+b+c+d=1.0, and c+d>0 are satisfied; (B) linear alkenyl group-containing organopolysiloxane which is represented by RRSiO(RSiO)SiORR, where, in the formula, Ris an alkenyl group, Rare each independently a monovalent hydrocarbon group other than an alkenyl group, and n is an integer of 50 or greater; (C) organohydrogenpolysiloxane having at least two hydrogen atom-bonded silicon atoms in one molecule; (D) a catalyst for curing reaction; and (E) a white pigment, wherein the component (A) is included in an amount of 20 mass % or more based on the total mass of the organopolysiloxane components, and the alkenyl group content in the components (A) to (C) is 1.7 mass % or less.