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:
Mar. 19, 2024
Filed:
Aug. 30, 2019
Covestro (Netherlands) B.v., Nieuwegein, NL;
Noriyasu Shinohara, Tokyo, JP;
Seiichirou Takahashi, Tokyo, JP;
Covestro (Netherlands) B.V., Geleen, NL;
Abstract
There is provided a radiation-curable resin composition for formation of a primary covering layer, the radiation-curable resin composition being able to form a cured layer having excellent flexibility and adequate mechanical strength. A radiation-curable resin composition for formation of a primary covering layer of an optical fiber, comprising a urethane oligomer, a polymerization initiator and a free-radically polymerizable non-urethane monomer, the urethane oligomer being the reaction product of a polyether-based urethane prepolymer and an isocyanate reactive compound containing one active hydrogen group, the isocyanate reactive compound containing an aliphatic alcohol and an ethylenic unsaturated group-containing isocyanate reactive compound, and the aliphatic alcohol content in the isocyanate reactive compound being 24 mol % or higher.