Chisso Corporation

Jnc Corporation

Jnc Petrochemical Corporation

Yoshiyuki Oogi

Jun Saito

Kouichi Hatada

Akiko Kageyama

Naoshi Kawamoto

Tsutomu Ushioda

Yoshitaka Morimoto

Mototake Tsutsui

Yasuhiro Shiraishi

Kazuyuki Sakamoto

Hiroyuki Fujita

Yoshitoyo Yasuda

Youichi Kugimiya

Taketo Hirose

Minoru Adachi

Shingo Itou

Nobuo Enoki

To provide a composite porous film in which thermal shrinkage is satisfactorily suppressed even when temperature exceeds a melting temperature of a polyolefin resin, adhesion between a microporous membrane and a heat-resistant layer is improved, and dropout of an inorganic filler is suppressed. The composite porous film is composed of the heat-resistant layer formed of the inorganic filler and a binder, and the microporous membrane formed of the polyolefin resin, and the composite porous film having a primary particle size of the inorganic filler in the range of 5 nanometers to 100 nanometers.

Composite porous film having excellent heat resistance

Propylene/ethylene random copolymer, molding material, and molded article

Propylene-ethylene copolymers processes for the production thereof and

A process for the production of a high stereoregular polypropylene wherein

Process for making high stereoregular polypropylenes

A polypropylene composition comprising 20 to 95% by weight of a stereoregular polypropylene characterized by the specified physical properties determined from .sup.13 C NMR spectra and 5 to 80% by weight of an .alpha.-olefin copolymer comprising 10 to 90% by weight of an .alpha.-olefin and 10 to 90% by weight of at least one of other .alpha.-olefins. The polypropylene composition demonstrates good balance of rigidity and impact resistance, high heat resistance and high toughness, when used as molding materials.

Polypropylene composition

Growing community of inventors

Chiba-ken, Japan

Yoshiyuki Oogi