Korea Research Institute of Chemical Technology

Other

Eun-Kyoung Kim

Yun-Ki Choi

Young-Hoon Ko

Hyung-Suk Cho

Chang-Jin Lee

Hyoung-Suk Cho

Seo-Bong Lee

Mi-Seon Ryoo

Young-Pil Kim

Myung-Hun Lee

A halogen-substituted reactive polysiloxane compound has a number average molecular weight of 400 to 100,000 and is represented by the formula Y&mdash;&lcub;C(R )(R )&rcub; &mdash;CH CH &mdash;Si(R )(R )&mdash;&lcub;O&mdash;Si(R )(R )&rcub; &mdash;CH CH &mdash;&lcub;C(R )(R )&rcub; &mdash;Y, in which Y is (X) (R) Si or (X) (R ) &mdash;Bz&mdash;C(R ) (X) ; X is a halogen atom selected from F, Cl, Br and I; R is an alkyl group from C to C including methyl, ethyl or propyl; R , R , R and R are a hydrogen, an alkyl group from C to C including methyl, ethyl or propyl, or a halogen-substituted alkyl or silane group; R is defined as R , or (X) (R ) C&mdash;&lcub;C(R )(R )&rcub; ; a is an integer from 1 to 3, and b is an integer from 0 to 2, wherein a&plus;b&equals;3; c is an integer from 0 to 1000; d is an integer from 1 to 50000; e and f are independently an integer from 0 to 4, wherein e&plus;f&equals;4; g and h are independently an integer from 0 to 3, wherein g&plus;h&equals;3; i and j are independently an integer from 0 to 3, wherein i&plus;j&equals;3; and Bz is a benzene ring.

Multi-reactive polysiloxane compound having halogen substituents and synthetic method thereof

Diarylethene compound, photochromic diarylethene type copolymer and method for the production of the same

The present invention relates to alkoxysilane-substituted diene copolymers, organic and inorganic hybrid complex compositions comprising the same and a process for the preparation of the same. The alkoxysilane-substituted diene copolymers are prepared by reacting a diene copolymer substituted by epoxy or hydroxy groups with a silane compound. Thus prepared alkoxysilane-substituted diene copolymer is characterized by the facts that it is in organic solvents and it is capable of being cured at low temperatures. The present invention also relates to a composition prepared by mixing the said copolymer with inorganic fillers and/or coupling agents. The copolymer of the formula (1) has high reactivity with coupling agents since it possesses reactive silane groups and thus provides the diene polymer composition as having improved compatibility with inorganic fillers. In addition, when the copolymer of the formula (1) is added to a sol-gel reactant, a substitution reaction proceeds smoothly even under mild reaction conditions and thus it is possible to introduce the third functional group to copolymer blocks.

Diene copolymer substituted by alkoxy silane, and organic and inorganic hybrid composition comprising the same

This invention relates to a poly (imide amic ester) random copolymer, a precursor thereof, and a process for preparing the same. Specifically this invention relates to a novel precursor of polyimide, poly(imide amic ester) which is chemically stable and has excellent workability in either liquid or solid state, a polyimide obtained therefrom and a process for preparing the same.

Stable precursor of polyimide and a process for preparing the same

Growing community of inventors

Taejeon, South Korea

Eun-Kyoung Kim