申请人:BASF Aktiengesellschaft
公开号:US05204178A1
公开(公告)日:1993-04-20
Novel (meth)acrylate copolymers which contain, as polymerized units, A) one or more (meth)acrylates and/or (meth)acrylamides having second order nonlinear optical properties and of the general formula I ##STR1## where R is hydrogen or methyl, X is a flexible spacer, which may or may not be present, Y is a divalent group having electron donor activity and Z is a noncentrosymmetric radical containing an easily polarizable conjugated .pi.-electron system and one or more electron acceptor groups, and B) one or more (meth)acrylates of alkanols where the alkyl radical is of 10 to 30 carbon atoms in a molar ratio of (A) to (B) of from 1:0.5 to 1:5 are very suitable as nonlinear optical materials for nonlinear optical arrangements and for the production of Langmuir-Blodgett films. The novel (meth)acrylate copolymers which contain terminal nitro, trifluoromethyl, cyano or fulven-6-yl groups as electron acceptors and have molar ratios A to B differing from those mentioned above are also suitable for intended uses outside nonlinear optics.
含有以下聚合单元的新型(甲基)丙烯酸酯共聚物,其中A)含有二阶非线性光学性质的一个或多个(甲基)丙烯酸酯和/或(甲基)丙烯酰胺,其一般式为I
其中R为氢或甲基,X为柔性间隔物,可以存在也可以不存在,Y为具有电子给体活性的二价基团,Z为含有易极化的共轭π-电子系统和一个或多个电子受体基团的非中心对称基团;B)在烷基基团为10到30个碳原子的烷醇的(甲基)丙烯酸酯中含有一个或多个,其摩尔比为(A):(B)从1:0.5到1:5,非常适用于非线性光学排列和Langmuir-Blodgett膜的制备的非线性光学材料。含有末端硝基,三氟甲基,氰基或富烯-6-基团作为电子受体并且A到B的摩尔比与上述不同的新型(甲基)丙烯酸酯共聚物也适用于非线性光学之外的用途。