申请人:Akzo Nobel N.V.
公开号:EP0290061A1
公开(公告)日:1988-11-09
A linear addition polymer having sidegroups which may be coupled to it or not through a spacer and have a molecular hyperpolarizability β of at least 10⁻³⁸ m⁴/V, characterized in that the recurring units of the polymer correspond to the formula
wherein X represents a hydrogen atom or a lower alkyl group and m = 1 or optionally 0, where
when m = 1
Y represents a
group and R has the meaning of
a) a hyperpolarizable group having a molecular hyperpolarizability β of at least 10⁻³⁸ m⁴/V, in the presence or not of a spacer, and optionally along with
b) a mesogenic group in the presence or not of a spacer, and/or
c) a hydrogen atom or a substituted or unsubstituted organic group having not more than 30 carbon atoms, and
when m = 0
Y represents a -CN, a substituted or unsubstituted phenyl group or a group of the formula -OR₁ or -CH₂OR₁, wherein R₁ has the meaning of a hydrogen atom or a substituted or unsubstituted aliphatic group having not more than 20 carbon atoms,
provided that
- at least 10% of the recurring units in the polymer contain a hyperpolarizable group having a molecular hyperpolarizability β of at least 10⁻³⁸ m⁴/V,
- at the most 40% of the recurring units in the polymer contain a mesogenic group, and
- that the quotient of the degree of substitution of the recurring units with a group having a molecular hyperpolarizability β of at least 10⁻³⁸ m⁴/V and the average molecular weight of R with the meaning given under b and c amounts to at least 5 × 10⁻⁴, a non-linear optical medium thereof oriented in an electric field and electro-optical laminates comprising such a non-linear optical medium.
一种具有侧基的线性加成聚合物,侧基可通过或不通过间隔物与之连接,其分子超极化率 β 至少为 10-³⁸ m⁴/V,其特征在于该聚合物的循环单元符合以下式子
其中 X 代表氢原子或低级烷基,m = 1 或可选 0,其中
当 m = 1 时
Y 代表一个
基团,R 的含义为
a) 分子超极化率 β 至少为 10-³⁸ m⁴/V 的可超极化基团,无论是否存在间隔物,并可选择连同
b) 介原基团(无论有无间隔物),和/或
c) 氢原子或碳原子数不超过 30 个的取代或未取代的有机基团,以及
当 m = 0 时
Y 代表-CN、取代或未取代的苯基或式-OR₁或-CH₂OR₁的基团,其中 R₁ 的含义是氢原子或碳原子数不超过 20 个的取代或未取代的脂肪族基团、
条件是
- 聚合物中至少 10%的重复单元含有可超极化的基团,其分子超极化率 β 至少为 10-³⁸ m⁴/V、
- 聚合物中最多有 40%的重复单元含有介原基,且
- 循环单元与分子超极化率 β 至少为 10-³⁸ m⁴/V 的基团的取代度与具有 b 和 c 项中所述含义的 R 的平均分子量的商至少为 5 × 10-⁴。