申请人:Mitsui Chemicals, Inc.
公开号:EP2738188A1
公开(公告)日:2014-06-04
The invention provides monolayer films which not only have hydrophilicity and are excellent in such properties as antifogging properties, antifouling properties, antistatic properties and anti-condensation properties but also tend to exhibit excellent transparency even with a large film thickness and excellent scratch resistance, as well as stacks having the monolayer film. The monolayer film is obtained by preparing a mixture including a monomer composition and a solvent, the monomer composition including a specific monomer and a polyvalent monomer having two or more (meth)acryloyl groups and being free of sulfonic group, carboxyl group and phosphoric group in a specific molar ratio, the solvent having a specific solubility parameter σ; applying the mixture onto a substrate and removing at least part of the solvent; and polymerizing the monomer composition to produce a monolayer film having at least one anionic hydrophilic group selected from a sulfonic group, a carboxyl group and a phosphoric group and a specific anion concentration ratio (Sa/Da) of the anion concentration (Sa) at the outer surface to the anion concentration (Da) at the middle point between the inner surface in contact with the substrate and the outer surface.
本发明提供的单层膜不仅具有亲水性,在防雾性、防污性、抗静电性和抗凝结性等性能方面表现优异,而且即使膜厚较大也往往表现出优异的透明度和优异的抗划伤性,同时还提供具有该单层膜的叠层。单层膜是通过以下方法获得的:制备包括单体组合物和溶剂的混合物,单体组合物包括特定单体和具有两个或两个以上(甲基)丙烯酰基且不含磺酸基、羧基和磷酸基的多价单体,其摩尔比为特定比例,溶剂具有特定的溶解度参数σ;将混合物涂在基底上,然后除去至少部分溶剂;使单体组合物聚合,生成单层膜,该膜具有至少一个选自磺酸基、羧基和磷酸基的阴离子亲水基团,且外表面的阴离子浓度 (Sa) 与与基底接触的内表面和外表面之间的中间点的阴离子浓度 (Da) 具有特定的阴离子浓度比 (Sa/Da)。