公开(公告)号：US20150367600A1

公开(公告)日：2015-12-24

申请号：US14764780

申请日：2014-02-04

Applicant: MITSUBISHI PLASTICS, INC.

Inventor： Kahoru NIIMI ,  Makoto INENAGA ,  Ryota YAMAMOTO

IPC: B32B7/12 ,  B32B37/12 ,  C09J133/08 ,  B32B27/30

CPC classification number: B32B7/12 ,  B32B27/16 ,  B32B27/308 ,  B32B37/12 ,  B32B2305/72 ,  B32B2307/412 ,  B32B2405/00 ,  B32B2457/20 ,  C08K5/0025 ,  C08L2312/00 ,  C09J5/00 ,  C09J7/20 ,  C09J133/02 ,  C09J133/08 ,  C09J2201/134 ,  C09J2203/318 ,  C09J2205/102 ,  C09J2205/31 ,  C09J2433/00 ,  C09J2433/003 ,  G02F2202/28 ,  Y10T428/2809

Abstract: One embodiment of the present invention provides a new transparent double-sided adhesive sheet that, in bonding of image display device-constituting members provided with a step portion on the bonding surface thereof with a transparent double-sided adhesive sheet interposed therebetween, can conform to the step portion to fill every corner therewith, can also allow strain generated in the adhesive sheet to be relaxed, and furthermore can maintain foaming resistance under a high-temperature and/or high-humidity environment without impairment of handleability. One embodiment of the present invention proposes a transparent double-sided adhesive sheet in a B-stage state, in which, first, the transparent double-sided adhesive sheet contains at least one (meth)acrylate (co)polymer, an ultraviolet polymerization initiator (A) having a molar absorptivity at a wavelength of 365 nm of 10 or more and a molar absorptivity at a wavelength of 405 nm of 0.1 or less, and a visible light polymerization initiator (B) having a molar absorptivity at a wavelength of 405 nm of 10 or more, and, second, a value (E′/G′) obtained by dividing a dynamic storage elastic modulus (E′) at 60° C. determined by a tension method, by a dynamic storage elastic modulus (G′) at 60° C. determined by a shear method is 10 or more.

Abstract translation: 本发明的一个实施方式提供了一种新的透明双面粘合片，其在与粘合表面上设置有台阶部分的图像显示装置构成部件与插入其间的透明双面粘合片的接合中可以符合 用于填充每个角部的台阶部分也可以使粘合片中产生的应变松弛，并且还可以在高温和/或高湿度环境下保持发泡性而不损害可操作性。 本发明的一个实施方案提出了一种B阶状态的透明双面粘合片，其中，首先，透明双面粘合片含有至少一种（甲基）丙烯酸酯（共）聚合物，紫外线聚合引发剂 （A）在波长365nm处的摩尔吸光率为10以上，波长405nm的摩尔吸光率为0.1以下，可见光聚合引发剂（B）的摩尔吸光系数为405 nm为10以上，第二为通过将通过张力法测定的在60℃下的动态储能弹性模量（E'）除以动态储能弹性模量（G）的值（E'/ G' '）在60℃下通过剪切法测定为10以上。