Mitsui Petrochemical Industries, Ltd.

Mitsui Chemicals, Inc.

Other

Toyoda Gosei Co., Ltd.

Nhk Spring Co., Ltd.

Kojima Press Industry Co., Ltd.

Tokushu Shikiryo Color & Chemical Inc.

Akira Uchiyama

Yuichi Itoh

Kyoko Kobayashi

Akira Matsuda

Katsuyoshi Yonekura

Shizuo Shimizu

Hiroyasu Yamaoka

Keiji Okada

Katsuo Okamoto

Masato Karaiwa

Toru Takehara

Masaaki Kawasaki

Yuichi Ito

Kunihiko Mizumoto

Naoaki Jimbo

Toshiyuki Tsutsui

Tetsuo Tojo

Junji Koizumi

Toshihiro Sagane

Tooru Koyama

Shigeo Nishikawa

Yasuhiko Otawa

Yoshio Yamazaki

Haruo Inoue

Michio Eriguchi

Junzo Ukai

Minoru Niwa

Takanori Sueda

Koichi Kusakawa

Sadao Uchida

Hideo Nishimura

Takayuki Onogi

Tsugunori Sugiura

Yuichi Itou

Kaoru Yorita

Tadashi Imai

Eiichi Sugihara

Kunihide Hiraoka

Kazuo Ito

Yoko Shimada

Motoshi Matsuura

Shigeki Ichimura

Shunichi Hamada

Shinichi Imazu

Masahiro Takedachi

Chika Kako

Shun-ichi Hamada

Shinobu Haga

Masaharu Murakami

Noboru Sakamaki

Kimio Jyougan

Akihiro Konda

Kazunori Aotuka

The foamed laminate based on olefin according to the present invention is composed of a substrate layer of a foamed body made of either an ethylenic thermoplastic elastomer comprising a polyethylene resin and an ethylene/&#x3b1;-olefin copolymer having a Mooney viscosity ML(100&#xb0; C.) of 90-250 and an ethylene content of 70-95 mole % or an ethylenic thermoplastic elastomer composition comprising 100 parts by weight of an olefinic thermoplastic elastomer and 1-20 parts by weight of an olefinic thermoplastic resin and, under lamination thereon, a skin layer made of either an ultrahigh molecular weight polyolefin resin having an intrinsic viscosity of 3.5-8.3 dl/g or made of an olefinic thermoplastic elastomer composition comprising an olefinic thermoplastic elastomer and a lubricant. The foamed laminate according to the present invention is easy in recycled use, obtainable at a high foaming expansion ratio with soft hand touch and is superior in the appearance, abrasion resistance, durability and sliding performance.

Layered product olefin foam and use

An olefin thermoplastic elastomer composition which is superior in the resistance to oils, heat resistance, formability and flexibility is provided, said elestomer composition comprising the components (A) 40&#x2013;90 parts by weight of a polypropylene resin having a melt flow rate (determined at 230 &#xb0; C. under a load of 2.16 kg according to ASTM D 1238) of 0.1&#x2013;5 g/10 minutes, (B) 10&#x2013;60 parts by weight of a copolymer rubber based on olefin, the contents of the components (A) and (B) summing up to 100 parts by weight, and (C) 20&#x2013;150 parts by weight of a softener, wherein the composition is in such a cross-linked state that the gel content thereof amounts to 97% by weight or higher.

Olefin thermoplastic elastomer composition

This invention relates to a perfectly or partially crosslinked olefinic thermoplastic elastomer composition which comprises 10 to 90 parts by weight of a crystalline polyolefin (a), 90 to 10 parts by weight of an olefin-based copolymer rubber (b) (the total amount of the components (a) and (b) being 100 parts by weight) and 3 to 100 parts by weight of a paraffinic mineral oil softening agent (c) having an evaporation loss of 0.4% by weight or less at a condition of 200&#xb0; C., atmospheric pressure and 1 hour and having a kinetic viscosity (40&#xb0; C.) of 50 to 250 cSt; an olefinic thermoplastic elastomer composition which is obtainable by subjecting a mixture including 40 to 85 parts by weight of an ethylene-based copolymer rubber (A), 60 to 15 parts by weight of an olefinic resin (B) and 45 parts by weight or less of a softening agent (C) [the total amount of the components (A), (B) and (C) being 100 parts by weight] to dynamic heat treatment in the presence of a crossliking agent and which has a gloss value of 80% or more and a haze value of 10% or less on glass plate when subjected to the fogging test at a condition of 100&#xb0; C. and 3 hours according to the prescription of A method of DIN 75201; and a manufacturing method and use of the compositions.

Low fogging thermoplastic elastomer composition and manufacturing method and use of same composition

An olefin-based thermoplastic elastomer composition comprising a thermoplastic elastomer blended with other resins and rubbers is provided. The thermoplastic elastomer contains polypropylene resin and an olefin-based copolymer rubber, and optionally, a linear polyethylene resin, and the thermoplastic elastomer has been crosslinked to a gel content of 95% or higher. A polyolefin resin, an olefin-based copolymer rubber and a softening agent are further blended with optional inorganic filler to provide the olefin-based thermoplastic elastomer composition. This composition is excellent in oil resistance and extrudability, and well-adapted for use as an energy-saving, resources-saving elastomer in applications including surface or skin material in autoparts, industrial mechanical parts, electric and electronic parts, and construction materials.

Thermoplastic olefin elastomer composition

The olefin thermoplastic elastomer of the invention has an islands-sea structure, in which the average particle diameter of the islands phases is not more than 2 &mgr;m, and has a gel fraction ranging from 0.5 to 15% by weight and a quantity of heat of melt at a temperature of 125&deg; C. or below, as measured in a different scanning calorimeter (DSC), of 40% or more of the total quantity of heat of melt. The olefin thermoplastic elastomer can be obtained by melt blending in the presence of a crosslinking agent of a specific amount a blend that contains specific amounts of: a high density polyethylene having a density of 0.940 g/cm or more, or a crystalline ethylene polymer having a crystallinity determined by a DSC method of 10% or more and a density of less than 0.940 g/cm , an ethylene/&agr;-olefin(/non-conjugated polyene) copolymer rubber comprising ethylene, an &agr;-olefin of 3 to 20 carbon atoms and optionally a non-conjugated polyene, and a polypropylene.

Olefin thermoplastic elastomer, process for producing the same and use thereof

An olefin thermoplastic elastomer composition comprises a crystalline polyolefin resin (A) and an ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber (B), and optionally a softener (C) and/or an inorganic filler (D), in a specific ratio. The copolymer rubber (B) is prepared by the use of a metallocene catalyst and comprises ethylene, an &agr;-olefin of 3 to 20 carbon atoms and a nonconjugated polyene. This composition ca provide molded products of more excellent tensile strength, elongation at break, elastomeric properties (elongation set, permanent compression set, etc.), heat resistance and low-temperature properties than the conventional non-crosslinked olefin thermoplastic elastomers, even if the composition is in the non-crosslinked form. The composition in the partially or completely crosslinked form can provided molded products of more excellent low-temperature properties, tensile strength, elongation at break and elastomeric properties than the conventional vulcanized rubbers.

Olefin thermoplastic elastomer composition comprising crystalline polyolefin resin and ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber

This invention relates to a thermoplastic elastomer composition which includes and comprises 10 to 60 parts by weight of a polyolefin (A), 30 to 87 parts by weight of a crosslinked rubber (B), 3 to 50 parts by weight of a softening agent (C) &lsqb;the total amount of (A), (B) and (C) being 100 parts by weight&rsqb; and 0.02 to 0.3 part by weight of a phenolic heat stabilizer (D) and which retains an elongation value at break by 80% or more, after aging for 500 hours in an air oven of 130&deg; C., of the value before the aging; and relates to a manufacturing method thereof.

Thermoplastic elastomer composition with high resistance to thermal deterioration

The present invention relates to an olefinic thermoplastic elastomer composition which comprises a crystalline polyolefin resin (A), an ethylene-&agr;-olefin-non-conjugated polyene copolymer rubber (B) and at least on rubber (C) selected from polyisobutylene, butyl rubber and a propylene-ethylene copolymer rubber having a propylene content of 50 mol % or more or an ethylene-&agr;-olefin copolymer (D) having a density of 0.870 to 0.940 (g/cm ) and an ethylene content of 85 mol % or more, said ethylene-&agr;-olefin-non-conjugated polyene copolymer rubber (B) being crosslinked thermoplastic elastomer composition, being obtained by random copolymerization of ethylene, and &agr;-olefin having 3 to 20 carbon atoms and a non-conjugated polyene in the presence of a metallocene catalyst, (1) containing the unit (a) derived from the ethylene and the unit (b) derived from the &agr;-olefin in a molar ratio of 40/60 to 95/5 &lsqb;(a)/(b)&rsqb;, (2) having an iodine value of 1 to 50 and (3) having an intrinsic viscosity &lsqb;&eegr;&rsqb; measured in decalin at 135&deg; C. of 1.0 to 10 dl/g; and relates to a method for manufacturing the same.

Olefinic thermoplastic elastomer composition and method for producing the same

A thermoplastic elastomer exhibiting scarce tendency of depositing gummy crust around the extrusion die upon extrusion molding articles therefrom and a superior oil-resistance, which comprises (A) a crystalline polyolefin resin and (B) a cross-linked rubber component produced by a specific melt-kneading technique and which has a certain high level of gel content, a high oil-resistance and a certain reduced rate of deposition of gummy crust on the extrusion die.

Thermoplastic elastomer and process for producing it

This invention relates to a method for manufacturing an olefinic thermoplastic elastomer composition, characterized by disposing specific kneading segment at least at one place of the screw on the occasion of manufacturing an olefinic thermoplastic elastomer composition comprising a polyolefin resin and a crosslinked rubber by dynamic crosslinking with a twin screw extruder.

Method for manufacturing olefinic thermoplastic elastomer composition

Laminated products of olefinic thermoplastic elastomer and constructional gaskets

The resin composition for a skin member according to the present invention comprises a completely or partially crosslinked olefin thermoplastic elastomer (A) in an amount of 100 parts by weight, an organopolysiloxane (B) having a viscosity (JIS K2283, 25&deg; C.) of not less than 1&times;10 cSt, preferably 1&times;10 to 1&times;10 cSt in an amount of 2 to 20 parts by weight, an organopolysiloxane (C) having a viscosity (JIS K2283, 25&deg; C.) of not less than 10 cSt and less than 1&times;10 cSt in an amount of 0.5 to 5 parts by weight, and optionally, a polyolefin resin (D) in an amount of 5 to 150 parts by weight and/or a fluoropolymer (E) in an amount of 0.5 to 10 parts by weight. The other resin composition for a skin member according to the invention comprises a completely or partially crosslinked olefin thermoplastic elastomer (A) in an amount of 100 parts by weight, a fluoropolymer (E) in an amount of 0.5 to 10 parts by weight, and optionally, a polyolefin resin (D) in an amount of 5 to 150 parts by weight. The laminate according to the invention is formed by laminating a skin member comprising any of the above compositions to a core comprising a thermoplastic elastomer. According to the invention, a resin composition for a skin member, which is capable of producing a laminate exhibiting good sliding properties for a window glass and excellent abrasion resistance and having only a slight amount of a die residue brought about in the extrusion molding, and a laminate using the resin composition can be obtained.

Resin compositions for skin members and laminates thereof

An trim material for the interior of an automobile obtained by successive injection molding. The trim comprises a surface layer and a base layer. The surface layer is formed from a composition comprising: (A) a partially cross-linked thermoplastic elastomer comprising a polypropylene resin and an &agr;-olefin copolymer rubber, and (B) a polybutylene-1 resin. The base layer is formed of a polypropylene resin or a blend of polypropylene resin and an organic filler. The interior trim material is lightweight, is easily recycled, and generates no hazardous gas when incinerated.

Interior trim for automobile

A process is provided for the production of expanded olefinic thermoplastic elastomer product having good external appearance, flexibility and heat resistance. This process features using, as raw materials, a particular olefinic thermoplastic elastomer and carbon dioxide as a blowing agent.

Process for the production of expanded olefinic thermoplastic elastomer products

Growing community of inventors

Chiba, Japan

Akira Uchiyama