| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin compsn. which has a high refractive index, is excellent in scratch resistance, and is useful as a coating material for optical applications by compounding a (meth)acrylate compd. having a fluorene structure with a polyfunctional urethane (meth)acrylate compd. SOLUTION: This compsn. contains (A) 20-90 pts.wt. (meth)acrylate compd. having a fluorene structure and represented by formula I (wherein a and b are each 1-5; R1 is H, CH3, or C2H5; and R2 is H or CH3) and/or formula II (wherein R2 is the same as in formula I), (B) 80-10 pts.wt. urethane (meth) acrylate compd. represented by formula III (wherein l is 2-5; m is 2-3; R is a polyhydric alcohol residue; X is an isocyanate residue; and R2 is the same as in formula I) and/or formula IV (wherein l, R, X, and R2 are each the same as in formula III; m is 1-2; n is 2-6; and Y is a polyhydric alcohol residue), and (C) a polymn. initiator in an amt. of 0.01-5 wt.% of the sum of ingredients A and B. |
