Toa Nenryo Kogyo Kabushiki Kaisha

Tonen Sekiyukagaku K.k.

Other

Toa Nenryo Kogyo, K. K.

Tonen Sekiyukagaku Kabushiki Kaisha

Masato Komatsu

Noboru Yamamoto

Isao Baba

Kiyotada Narukawa

Takashi Mikami

Masaaki Isoi

Tsuyoshi Kanai

Hiroshi Inoue

Makoto Yoda

Kazuo Sei

Keiichi Morikubo

A resin composition for bumpers including:

Resin composition for bumpers

Thermoplastic elastomer composition

A two-step process for production of thermoplastic elastomer, which comprises dynamically vulcanizing polypropylene and olefinic rubber in the presence of peroxide (1st step), and dynamically vulcanizing the vulcanized mixture, polypropylene and halogenated butyl rubber in the presence of zinc oxide (2nd step). In another method (a) polyolefin and olefin rubber are dynamically cross-linked in the presence of an organic peroxide and (b) in a separate second operation a dynamically vulcanized blend comprising polyolefin and halogenated butyl rubber is prepared and mixed with (a) to disperse (a) and (b) in one another. The thermoplastic elastomer composition is useful in materials for parts of automobiles. In an example, pp 9 wt. % parts, EPDM 21 wt. % parts, peroxide 0.3 wt. % part and divinylbenzene 0.5 wt. % part were blended and supplied to the first hopper (1) of biaxial extruder as shown in a figure. In the first blending zone (2), temperature and residence time are 200.degree. C. and 60 seconds respectively. And then, to the second hopper (3) of the extruder, pp 50 parts and the vulcanized product (EPDM+chlorinated butyl rubber) 20 parts were supplied and extruded in the heat blending zone (4) above mentioned mixture for 30 seconds of residence time. The physical properties of the composition are MFR: 18, Flex. Mod.: 3,300 (23.degree. C.) and 1,150 (80.degree. C.), Tens. at break: 105, Elong.: 420%, Izod.: No break (room temperature) and 25 (-40.degree. C.) Shore-D: 58, Flow marks: good and paintability: 100/100.

Method for preparation of thermoplastic resin composition

Method of production of thermoplastic elastomer compounds

Method of manufacture of thermoplastic elastomer compounds

A process for producing a hydrophilic polyolefin nonwoven fabric which comprises treating with a plasma a nonwoven fabric composed of fibers of a polyolefin containing more than 0.1 parts by weight of hindered amine compound for 100 parts by weight of polyolefin.

Process for producing hydrophilic polyolefin nonwoven fabric

An improved molding compound comprising a polyolefin modified with an unsaturated carboxylic acid, and has dispersed therein a filler material comprising a mixture of glass fiber and calcium silicate. In one embodiment the molding compound also includes an ethylene-.alpha.-olefin copolymer rubber.

Polyolefin molding composition containing carboxylic acid-modified

A polyolefin composition comprising a modified polyolefin obtained by adding an unsaturated carboxylic acid or an anhydride thereof to a polyolefin or mixtures of said modified polyolefin and an unmodified polyolefin, an inorganic filler, one or more nucleating agents or a combination thereof with one or more heat deterioration inhibitors, said polyolefin composition evidencing reduced deterioration by heat or reduction of its mechanical strength during a molding operation.

Polyolefin composition containing (a) filler (b) nucleating agent and

Growing community of inventors

Hanno, Japan

Masato Komatsu