Mitsui Petrochemical Industries, Ltd.

Shell Oil Comapny

Masaki Kohyama

Norio Kashiwa

Kunisuke Fukui

Takeshi Muranaka

Masaya Yamada

Mamoru Kioka

Takashi Ueda

Hideki Sakai

Seiichi Ikeyama

Yoshinori Akana

Hiroyuki Hori

Kenji Iwata

Charles C Hwo

Kazumitsu Kawakita

Tsuneo Yashiki

Hiroshi Nishikawa

Masanobu Ishiyama

Satoshi Matsumoto

Shin Tokui

A multi-layer pipe has an innermost layer formed of a butene polymer composition. At least one other layer is formed of a polyolefin resin composition comprising (A) 95-5 parts by weight of a polyolefin resin, (B) 5-95 parts by weight of a filler, and (C) 0.1-10 parts by weight per 100 parts by weight of components (A) and (B) combined of a modified polyolefin resin. This multi-layer pipe undergoes minimal elongation by heat so that it is free from troubles by thermal deformation even when high temperature fluid is passed therethrough, has high rigidity, and is thus suitable as plumbing for cold and hot water.

Multi-layer pipe

A highly crystalline semi-rigid random 1-butene/ethylene copolymer consisting of 1-butene and ethylene, said copolymer having the following characteristics (A) to (K);

Random 1-butene/ethylene copolymer

The present invention relates to a novel ethylene/pentene-1 copolymer whose molded film has a good balance between impact resistance and tear properties and high transparency, also is prominently reduced in a variation of the transparency even after subjected to a heat treatment, and further shows high blocking resistance, provided that the copolymer fulfills specific requisites. The invention also relates to a process for the preparation of the above-mentioned ethylene/pentene-1 copolymer and a formulation of the ethylene/pentene-1 copolymer composition using a stabilizer. According to the invention, there can be obtained an ethylene/pentene-1 copolymer composition which is excellent in heat stability in the molding stage, long-term heat stability and weatherability.

Ethylene/pentene-1 copolymer and ethylene/pentene-1 copolymer composition

Ethylene/pentene-1 copolymer, and ethylene/pentene-1 copolymer

The ethylene/pentene-1 copolymer composition of the present invention comprises an ethylene/pentene-1 copolymer satisfying specific requests, and a high-pressure polyethylene, polyethylene having a density of greater than 0.935 or low crystalline .alpha.-olefin random copolymer. This composition is excellent in transparency, moldability, heat sealing property at low temperature and tear property, and are particularly useful for packaging film material.

Ethylene/pentene-1 copolymer compositions and their use

The ethylene/pentene-1 copolymer composition comprises an ethylene/pentene-1 copolymer satisfying specific request and an ethylene/vinyl acetate copolymer. This composition has excellent balance between impact resistance and tear properties, excellent transparency and good hot tack properties, and are particularly useful for packing films.

Ethylene/pentene-1 copolymer compositions

A random 1-butene copolymer comprising 1-butene and an alpha-olefin having 5 to 20 carbon atoms, said copolymer having the following characteristics (A) to (I):

Random 1-butene copolymer

A random 1-butene/ethylene copolymer comprising 1-butene and ethylene, said copolymer having the following characteristics (A) to (I):

A crystalline random propylene copolymer composition comprising (i) a crystalline random propylene copolymer comprising 99 to 85 mole % of propylene and 1 to 15 mole % of an alpha-olefin other than propylene and (ii) a random 1-butene copolymer comprising ethylene and 1-butene, the weight ratio of the copolymer (i) to the copolymer (ii) being in the range of from 5:95 to 90:10, said random 1-butene copolymer (ii) satisfying the following conditions:

Crystalline random propylene copolymer composition and composite

The composition of crystalline 1-butene polymer comprising:

Crystalline 1-butene polymer composition

The composition of crystalline 1-butene polymer comprising

A laminated structure comprising a substrate layer of a crystalline propylene resin and, positioned in direct contact with at least one surface of said substrate layer, a heat-sealable layer of a crystalline random propylene copolymer composition, wherein the crystalline random propylene copolymer composition is a mixture composed of

Laminated structure comprising a substrate layer composed of a

A polymer blend with good hot tack and a low and broad heat seal initiation temperature range for vertical and horizontal form and fill film packaging which contains a copolymer of butene-1 and propylene and a copolymer of propylene and ethylene.

Polybutylene blend for form and fill film packaging

A film-forming propylene copolymer composed of a major amount of propylene and a minor amount of ethylene, characterized by having

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Ichihara, Japan

Masaki Kohyama