CPC C03C 25/326 (2013.01) [C03C 25/104 (2013.01); C03C 25/28 (2013.01); C08F 222/06 (2013.01); C08F 222/40 (2013.01); C08F 290/067 (2013.01); C08G 18/04 (2013.01); C08G 18/6715 (2013.01); C08G 18/76 (2013.01); C09D 175/16 (2013.01)] | 17 Claims |
1. A radiation polymerizable composition for forming a primary coating layer of an optical fiber, the radiation polymerizable composition comprising:
(A) a urethane oligomer comprising a structure represented by formula (I) below:
wherein R is a vinyl group and * is a bond;
(B) one or more compounds of:
(i) maleic anhydride,
(ii) a compound represented by formula (II) below:
wherein R1 is a single bond or an alkanediyl group comprising 1 to 6 carbon atoms, and
R2 is a hydrogen atom, a hydroxy group, or a group represented by formula (II-1) or formula (II-2) below:
wherein R3 is a hydrogen atom, an amino group, a carboxy group, a hydroxy group, an alkyl group, or an alkoxy group, and * is a bond, and
wherein R4 is a hydrogen atom, an amino group, a carboxy group, a hydroxy group, an alkyl group, or an alkoxy group, and * is a bond, or
(iii) a compound represented by formula (III) below:
wherein R5 is an alkanediyl group comprising 1 to 6 carbon atoms; and
(C) a radiation polymerization initiator.
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