| abstract |
The present invention provides a resin composition for forming a core of an optical waveguide, which can be developed with a dilute alkaline aqueous solution and provides a core having excellent transparency and flexibility. SOLUTION: (a) polythiocarbonate polythiol, (b) acidic group-containing polyol or / and acidic group-containing polythiol, (d) polyisocyanate or / and polyisothiocyanate, (e) hydroxyl group-containing (meta) (A) polythiourethane poly (meth) acrylate obtained by reacting with acrylate, and (C) a photopolymerization initiator, and (A) acid value of polythiourethane poly (meth) acrylate is 20 to 200 mgKOH The resin composition for core formation of an optical waveguide which is / g. [Selection figure] None |