New Japan Chemical Co., Ltd.

Masafumi Yoshimura

Naoki Ikeda

Kazuaki Mizoguchi

Toshiaki Kobayashi

Hiroshi Kitagawa

Yuji Kawashima

Yoshiharu Kimura

Yasuyuki Kawahara

Kiyoshi Sadamitsu

Tomio Nobe

Masaru Sugiura

Sumio Fujimoto

Disclosed are a crystalline polypropylene resin composition comprising a crystalline polyproplylene resin and a &bgr;-nucleating agent, and a method of increasing the proportion of &bgr;-form crystals in a crystalline polypropylene resin molding comprising molding the composition, the &bgr;-nucleating agent being a diamide compound.

Crystalline polypropylene resin composition and amide compounds

Disclosed are a polybutene-1 resin composition comprising a polybutene-1 resin and a Form-II to Form-I crystal transformation accelerator, and a method of accelerating the Form-II to Form-I crystal transformation comprising molding the polybutene-1 resin composition and allowing the molded product to stand at about 0 to 50.degree. C., the crystal transformation accelerator being an amide compound.

Polybutene-1 resin composition and a method of accelerating the crystal

Disclosed are a process for producing a porous stretched article of .beta.-crystalline polypropylene-based resin, the process comprising the steps of crystallizing a melt of a polypropylene-based resin composition at a temperature of 15.degree. to 140.degree. C. to form a solidified product containing .beta.-form crystals and stretching the resulting solidified product at a temprature which is higher than 20.degree. C. but lower than the melting point of the .beta.-form crystals in said solidified product, the polypropylene-based resin composition comprising a polypropylene-based resin and 0.0001 to 5 parts by weight, per 100 parts by weight of the polypropylene-based resin, of at least one specific amide compound; and a porous stretched article produced by the process.

Porous stretched article of polypropylene-based resin and process for

This invention provides a crystalline polyolefin-type resin composition comprising a crystalline polyolefin-type resin and two kinds of nucleating agents, i.e., a di(p-substituted-benzylidene)sorbitol (I) and an o-substituted benzylidene-p-substituted benzylidene sorbitol (II) which are used in an amount of about 0.08 to about 1 part by weight per 100 parts by weight of the resin, and the proportion of (II) to (I) is about 0.5 to about 8 parts by weight of (II) per 100 parts by weight of (I). The composition can give molded articles having high transparency and other properties and free from bleeding-out.

Crystalline polyolefin-type resin compositions

This invention is directed to a composition for recovering a liquid organic material comprising:

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Kyoto-fu, Japan

Masafumi Yoshimura