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. 11, 2023
Filed:
Jan. 15, 2021
Japan Fine Coatings Co., Ltd., Ibaraki, JP;
Japan Fine Coatings Co., Ltd., Ibaraki, JP;
Abstract
[Problem] To provide a radiation curable resin composition which is suitable as a primary material for optical fibers, while having a high curing rate by means of irradiation of radiation [Solution] A radiation polymerizable composition for forming an optical fiber primary coating layer, said composition containing: (A) a urethane oligomer containing a structure represented by formula (I) (in formula (I), R represents a vinyl group; and * represents a bonding hand); (B) one or more compounds selected from among (i) maleic acid anhydride, (ii) a compound represented by formula (II) (in formula (II), Rrepresents a single bond or an alkanediyl group having from 1 to 6 carbon atoms; and Rrepresents a hydrogen atom, a hydroxy group or a specific group represented by formula (II-1) or formula (II-2)), and (iii) a compound represented by formula (III) (in formula (III), Rrepresents an alkanediyl group having from 1 to 6 carbon atoms); and (C) a radiation polymerization initiator.