Abstract:
A liquid crystal aligning agent comprising two or more polymers selected from the group consisting of polyamic acids and imidated polymers having structures prepared by dehydration and ring closure of polyamic acids. In the above two or more polymers, the larger the degree of imidation of the polymer, the smaller the surface free energy of the polymer. This aligning agent is less likely to cause an afterimage in a liquid crystal display device and has a high pretilt angle.
Abstract:
A thermoplastic elastomer composition obtained by heat-treating dynamically a mixture comprising both a thermoplastic resin (A) having a melting point of 165°C or above and an elastomer (B) comprising constituent units derived from a monomer having an ester group in the presence of a crosslinking agent (C) consisting of a polymer (C1) which is composed of constituent units derived from a (meth)acrylic ester and has a weight-average molecular weight (Mw) of 1000 to 30000 and a molecular weight distribution (Mw/Mn) of 1.0 to 4.0 and/or a polymer (C2) which comprises 5 to 35 % by mass of constituent units derived from a (meth)acrylic ester and 65 to 95 % by mass of constituent units derived from an aromatic vinyl monomer and has a weight-average molecular weight of 1000 to 30000 and a molecular weight distribution (Mw/Mn) of 1.0 to 4.0. The composition is excellent in flexibility, heat resistance, mechanical properties, rubber elasticity, and oil resistance and has an excellent sea-island structure as a whole.
Abstract translation:一种热塑性弹性体组合物,其是通过在含有具有165℃以上的熔点的热塑性树脂(A)和含有来自具有酯基的单体的结构单元的弹性体(B)的混合物中动态热处理而得到的热塑性弹性体组合物 (C),由来自(甲基)丙烯酸酯的结构单元构成的重均分子量(Mw)为1000〜30000的聚合物(C1)和分子量分布(Mw) / M n)为1.0〜4.0的聚合物构成单元和/或由来自(甲基)丙烯酸酯的构成单元5〜35质量%和来自芳香族乙烯基单体的构成单元65〜95质量%构成的聚合物(C2) 重均分子量为1000〜30000,分子量分布(Mw / Mn)为1.0〜4.0。 该组合物具有优异的柔韧性,耐热性,机械性能,橡胶弹性和耐油性,整体上具有优良的海岛结构。