Idemitsu Kosan Company, Limited

Idemitsu, Kosan Kabushiki-kaisha (idemitsu Kosan Co., Ltd.)

Hidehiko Kaji

Kikuo Nagatoshi

Akio Inayoshi

Noriki Fujimoto

Toshimichi Ito

Masami Tomikawa

Osamu Isogai

Takeshi Matsumoto

Atsunobu Sakoda

Hirozo Sugahara

Hitomi Tomari

Takahiro Hirai

Norio Sugi

Yuzo Ohta

Hirozo Sugahana

Shinsuke Sagata

Atsuo Ikenaga

Toshihide Nara

Shoichi Iwata

Flame retarded resin compositions are formed of specified quantities of polypropylene, polyethylene, inorganic filler and flame retarder such as an organic halide.

Flame retarding polyolefin resin blend composition

A resin composition comprising a modified polypropylene obtained by reacting a polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator, another polyolefin and, if desired, an inorganic and/or an organic filler. The resin composition has excellent coating, adhesion and plating properties.

Resin compositions containing modified polypropylene

A process for producing a resin composition having excellent plating properties comprising heating a mixture consisting substantially of 100 parts by weight of a polyolefin resin, 5 to 150 parts by weight of an inorganic filler, 1 to less than 20 parts by weight of a liquid rubber, 0.1 to 10 parts by weight of an unsaturated carboxylic acid and 0.001 to 10 parts by weight of a radical generator at 110.degree. to 280.degree. C. in the absence of solvents.

Process for production of resin compositions with excellent plating

A process for producing modified polypropylene comprising reacting polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator.

Process for production of modified polypropylene

Pencils not requiring sharpening are produced by wrapping a thermoplastic resin sheet, which has been uniaxially stretched, around a core material so that a stretched direction of the sheet forms a spiral against the core material, whereby the sheet forms a holder for the pencil which may be stripped off to selectively expose the core material.

Pencils not requiring sharpening

A polyethylene composition consisting of: (A) a high density polyethylene with a viscosity-average molecular weight of 10 .times. 10.sup.4 to 20 .times. 10.sup.4, a number average molecular weight of 1 .times. 10.sup.4 or greater and a ratio between weight average molecular weight and number average molecular weight of 20 or less; (B) at least one inorganic calcium compound selected from a group consisting of calcium sulfite, calcium sulfate and calcium carbonate; and (C) a solid lubricant, if desired, the composition produces a film or sheet whose internal tearing resistance is high and equal in both longitudinal and lateral directions and the processibility of the resin composition may be extremely improved by incorporating as a fourth component, within a range of 1:5 to 5:1 in weight ratio with respect to the aforementioned high density polyethylene, a different high density polyethylene with a melt index of 0.1 to 1.0.

Polyethylene composition

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Sodegaura, Japan

Hidehiko Kaji