CURED BY RADIATION POLYMER COMPOSITION FOR COATING WIRES

摘要

1. A radiation curable wire coating polymer composition comprising the following ingredients (A), (B) and (D) :( A) a urethane (meth) acrylate having two or more structural parts derived from an aliphatic polyol, (B) a compound having a cyclic structure and one ethylenically unsaturated group, (D) a compound represented by the following formula (4a) in which R represents a monovalent organic group having an ethylenically unsaturated group, and R represents a hydrogen atom or a monovalent organic group which t have an ethylenically unsaturated group. 2. A radiation curable wire coating polymer composition according to claim 1, wherein said ingredient (A) is a urethane (meth) acrylate having two or more structural parts derived from an aliphatic polyol with a molecular weight of from 500 to 1000 g / mol. . A radiation curable wire coating polymer composition according to claim 1, wherein ingredient (B) contains isobornyl (meth) acrylate and its content is 50% by weight of ingredient (B). A radiation curable wire coating polymer composition according to claim 1, wherein ingredient (D) is a compound represented by the following formula (4) in which R is a hydrogen atom or a methyl group, n is from 0 to 1, j is from 1 to 2 and k is 3-j. 5. A radiation curable wire coating polymer composition according to claim 1, wherein the content of the lactam compound containing the N-vinyl group is 5% by weight or less of the total composition. A radiation curable polymer coating composition for wires according to claim 1, wherein