Kanegafuchi Chemical Industry Co., Ltd.

Kazumasa Hashimoto

Kazuya Yonezawa

Fumio Kawakubo

Hiroshi Ando

Keiko Nishimura

Masaaki Azuma

Jun Hattori

A curable polymer composition comprising (a) an oxyalkylene polymer having a silicon-containing group which has a hydroxyl or hydrolyzable group bonded to the silicon atom and can be crosslinked through a silanol condensation reaction, and (b) a paraffinic hydrocarbon, which composition provides a cured material having improved tack which remains on the surface of the cured material.

Curable polymer composition

This invention relates to processes for producing an olefin-terminated polyester. In one of the processes which comprises reacting an olefin-terminated diester compound with a lactone in the presence of a polymerization catalyst with transesterification ability, the lactone is in a limited amount added to the reaction system. In another process which comprises reacting an olefin-terminated diester compound, a lactone compound, a cyclic acid anhydride and an epoxy compound in the presence of a polymerization catalyst with transesterification ability, the lactone, cyclic acid anhydride and epoxy compound are each in a limited amount added to the reaction system. In accordance with this invention, olefin-terminated polyesters having high terminal modification rates can be synthesized.

Process for production of olefin-terminated polyesters

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Akashi, Japan

Kazumasa Hashimoto