Kuraray Co., Ltd.

Kurary Company, Ltd.

Masao Ishida

Koji Hirai

Takuji Okaya

Yukiatsu Komiya

Setuo Yamashita

Shinji Komori

Noriaki Yoshimura

Yasuo Tokitoh

Toshihiro Omatsu

Makoto Yano

Yoichi Matsumoto

Keiji Kubo

Novel polyamide copolymers having skeletons of a specific structure are disclosed. The polyamide copolymers have excellent resistance to hydrolysis, low temperature characteristics (low temperature softness), heat aging resistance and mechanical properties as compared to conventional polyamide copolymers. The polyamide copolymers also show excellent efficiencies in fabrication properties and transparency. In particular, the polyamide copolymers having a branched structure in the molecule thereof provide good results.

Polyamide copolymers

Novel trimethylolheptanes having three highly reactive hydroxyl groups are provided. They are useful as raw materials for the production of polyesters for use in or as raw materials or modifiers for paints, inks, adhesives, coating compositions and molding resins. Uses for the trimethylolheptanes are also provided.

Trimethylolheptanes and use thereof

Disclosed are novel polyamideimide elastomers obtained by reaction of carboxyl-telechelic polymer(s) having a molecular weight of 500 to 10,000 aromatic diisocyanate(s), trimellitic acid anhydride and a dicarboxylic acid having 4 to 18 carbon atoms in a particular proportion. The polyamideimide elastomers have excellent heat resistance, oil resistance and low temperature characteristics and have mechanical properties which are comparable to those of polyurethane elastomers. Further, the said elastomers have a particular characteristic that they may retain a rubber-like property even at a high temperature.

Polyamideimide elastomer and production thereof

Growing community of inventors

Kurashiki, Japan

Masao Ishida