Kaneka Corporation

Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Yoshimichi Yamanaka

Kazuya Yonezawa

Yoshikuni Deguchi

Masashi Sakaguchi

Hiroshi Fujisawa

Shigeru Hagimori

Takeshi Chiba

Toshihiko Okamoto

Makoto Chiba

Shun Wachi

Naoki Furukawa

Hidenari Tsunemi

Jyunji Takase

Koji Tsuneishi

Syun Wachi

Yuriko Asai

This invention provides a primer composition comprising the following (A), (B), (C) and (D) components:

Primer composition and bonding method

Curable composition

Hydrosilylation process and polymers produced by the process

Processes for producing polymers having functional groups

A curable composition comprising the components (A), (B), (C) and (D), viz.

The present invention provides a novel halogen-free solvent system which can produce a good isobutylene polymer and can be easily reused. A novel process for the production of an isobutylene polymer is provided which comprises using a hydrocarbon solvent having a boiling point of not lower than 105.degree. C. and a melting point of not higher than -90.degree. C. Heretofore, a solvent system containing a halogenated hydrocarbon such as methylene chloride has been used for the production of an isobutylene polymer. However, such a solvent system has a great adverse effect on the environment. Therefore, a non-halogenated solvent is desirable. The present invention is characterized by the use of a hydrocarbon solvent as a reaction solvent. The resulting polymer has good properties. Further, compounds which are produced as by-products during the reaction can be easily removed, enabling the recycling of the solvent used. Thus, the production cost can be reduced.

Process for producing unsaturated group-terminated isobutylene polymer

The present invention provides a novel solvent which is capable of providing an excellent isobutylene polymer, little affects the environment, has a lower solubility in water than those of halogenated hydrocarbons having 1 or 2 carbon atoms and can be decomposed relatively easily. Namely, the present invention relates to: a process for producing an isobutylene polymer, which comprises performing a cationic polymerization reaction in a solvent containing primary and/or secondary monohalogenated hydrocarbon(s) having 3 to 8 carbon atoms, and an isobutylene polymer thus obtained; and a process for producing an isobutylene polymer having a vinyl group introduced into the terminal thereof, which comprises reacting the isobutylene polymer produced above with 1,9-decadiene or allyltrimethylsilane, and an isobutylene polymer thus obtained.

Process for producing isobutylene polymer

Growing community of inventors

Toyonaka, Japan

Yoshimichi Yamanaka