Patent ID: 9534151
Date: 2017-01-03
CPC Classifications: C08G,C09J,Y10T

Claim:
1. A sheet produced by curing an energy ray curable composition which comprises: a urethane acrylate oligomer; a compound having a thiol group in the molecule; a photopolymerization initiator, and an energy ray polymerizable monomer, wherein said compound having a thiol group in the molecule comprises at least one selected from the group consisting of nonyl mercaptan, 1-dodecanethiol, 1,2-ethanedithiol, 1,3-propanedithiol, triazinethiol, triazinedithiol, triazinetrithiol, 1,2,3-propanetrithiol, tetraethylene glycol-bis(3-mercaptopropionate), trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetrakis(3-mercaptopropionate), pentaerythritol tetrakis thioglycolate, dipentaerythritol hexakis(3-mercaptopropionate), tris[(3-mercaptopropionyloxy)-ethyl]-isocyanurate, 1,4-bis(3-mercaptobutyryloxy)butane, pentaerythritol tetrakis(3-mercaptobutyrate) and 1,3,5-tris(3-mercaptobutyloxyethyl) -1,3,5-triazine-2,4,6-(1H, 3H, 5H)-trione, wherein the sheet has a thermal weight reduction percentage of 2.1% or less when the sheet is allowed to stand in an air atmosphere at 180° C. for 60 minutes, wherein a weight average molecular weight of the urethane acrylate oligomer is 1,000 to 30,000 and wherein an amount of the energy ray polymerizable monomer is 30 to 300 parts by mass based on 100 parts by mass, in terms of solid, of the urethane acrylate oligomer.