申请人:Mitsui Chemicals, Inc.
公开号:EP3505344A1
公开(公告)日:2019-07-03
It is a main object of the present invention to impart higher antifogging properties to the hydrophilic material formed of a crosslinked resin, having a surface enriched with hydrophilic groups, previously proposed by the inventors. The laminate of the present invention includes a water absorbing layer (B) and a hydrophilic layer (A) provided in this order on a substrate, wherein the hydrophilic layer (A) is formed of a crosslinked resin having an anionic, cationic or nonionic hydrophilic group, and has a gradient of hydrophilic groups (intensity of hydrophilic group on surface of the hydrophilic layer (A)/intensity of hydrophilic group at 1/2 of thickness of the hydrophilic layer (A)) of not less than 1.1; and the water absorbing layer (B) is formed of a crosslinked resin having a water absorption rate per unit mass (g) of in the range of 5 to 500 wt%.
本发明的主要目的是使发明者以前提出的由表面富含亲水基团的交联树脂形成的亲水材料具有更高的防雾性能。本发明的层压材料包括依次设置在基材上的吸水层(B)和亲水层(A),其中亲水层(A)由具有阴离子、阳离子或非离子亲水基团的交联树脂形成,其亲水基团的梯度(亲水层(A)表面的亲水基团强度/亲水层(A)1/2 厚度处的亲水基团强度)不小于 1;吸水层(B)由具有阴离子、阳离子或非离子亲水基团的交联树脂形成,其亲水基团的梯度(亲水层(A)表面的亲水基团强度/亲水层(A)1/2 厚度处的亲水基团强度)不小于 1。1;吸水层(B)由单位质量(g)吸水率在 5 至 500 wt%范围内的交联树脂形成。