Abstract: Use of copolymers (C) comprising at least one epoxy group and at least one alkoxysilane group as stabilizers for polymers (P), where the copolymers (C) are generally obtained via polymerization of monomers and said monomers comprise those that comprise epoxy groups or alkoxysilane groups or epoxy groups and alkoxysilane groups, or that are reacted during or after polymerization and, after the reaction, comprise epoxy groups or alkoxysilane groups, or epoxy groups and alkoxysilane groups. Processes for stabilizing polymers (P) with respect to hydrolysis, which comprise adding, to the polymers (P), an effective amount of copolymers (C). Copolymers (C?) composed of specific compositions of monomers comprising at least one epoxy group and at least one alkoxysilane group, and also optionally other monomers. Mixtures comprising copolymers (C?) and polymers (P).

Abstract: This invention provides novel polyethers and polycarbonates which exhibit nonlinear optical response, and which have utility as a transparent optical component in optical light switch and high modulator devices.These polyethers and polycarbonates are the polymerization product of one or more monomers having the formula ##STR1## in which Z is a conjugated heterocyclic substituent having a NO.sub.2 or a CN group. Further, the invention relates to a method of making the polycarbonate by a ring opening polymerization in the presence of an electric field. In a separate embodiment, the invention relates to non-linear optical devices made with these polymers.