公开(公告)号：US20170145137A1

公开(公告)日：2017-05-25

申请号：US14907925

申请日：2014-06-17

Applicant: DIC CORPORATION

Inventor： Shunsuke Yamada ,  Takeshi Ibe ,  Nobuo Kobayashi ,  Yasuko Odani ,  Masashi Sugiyama

IPC: C08F290/06 ,  G02B1/04

CPC classification number: C08F290/067 ,  C08F290/06 ,  G02B1/041 ,  C08L75/14

Abstract: Provided is a photocurable resin composition that has a low viscosity and is capable of yielding a high refractive index. Specifically, a urethane (meth)acrylate resin (A) obtained by a reaction of an aromatic diisocyanate compound (a), a polyol compound (b), and a hydroxyl-group-containing (meth)acrylate compound (c) as essential raw material components is used. The urethane (meth)acrylate resin (A) contains a structural moiety (a-1) represented by structural formula (1) below: (where R1 represents a hydrogen atom or a methyl group) and a structural moiety (a-2) represented by structural formula (2) below: (where R1, R2, R3, X1, and X2 each independently represent a hydrogen atom or a methyl group) at a (a-1)/(a-2) molar ratio of 45/55 to 60/40. The polyol compound (b) has an aromatic hydrocarbon skeleton.

公开(公告)号：US10066042B2

公开(公告)日：2018-09-04

申请号：US14907925

申请日：2014-06-17

Applicant: DIC Corporation

Inventor： Shunsuke Yamada ,  Takeshi Ibe ,  Nobuo Kobayashi ,  Yasuko Odani ,  Masashi Sugiyama

IPC: C08F290/06 ,  G02B1/04

Abstract: Provided is a photocurable resin composition that has a low viscosity and is capable of yielding a high refractive index. Specifically, a urethane (meth)acrylate resin (A) obtained by a reaction of an aromatic diisocyanate compound (a), a polyol compound (b), and a hydroxyl-group-containing (meth)acrylate compound (c) as essential raw material components is used. The urethane (meth)acrylate resin (A) contains a structural moiety (a-1) represented by structural formula (1) below: (where R1 represents a hydrogen atom or a methyl group) and a structural moiety (a-2) represented by structural formula (2) below: (where R1, R2, R3, X1, and X2 each independently represent a hydrogen atom or a methyl group) at a (a-1)/(a-2) molar ratio of 45/55 to 60/40. The polyol compound (b) has an aromatic hydrocarbon skeleton.