Showa Denko Kabushiki Kaisha

Showa Denko K.k.

Shigeru Kurosawa

Takashi Ueshima

Shoichi Kobayashi

Junichi Nakamura

Zenichiro Izumi

Yasuzi Tanaka

Kunio Matsuki

Takumi Araki

Hiroyuki Nagaishi

Rika Akiyoshi

A release material of a good release property is prepared by shaping a resin composition comprising a thermoplastic polyolefin resin, a dimethylpolysiloxane and a functional compound, irradiating the shaped composition with electron beams, and if desired, heat-treating the shaped composition.

Electron beam-curable composition for release material and process for

A thermoplastic elastomer with well-balanced physical properties is prepared by treating a rubber/resin composition comprised of (a) 45-90 wt. parts of a rubbery component and (b) 10-55 wt. parts of a polyolefin resin, with a curing agent. The rubbery component (a) is comprised of 5-100 wt. % of an ethylene-propylene copolymer rubber having an ethylene content of 60-78 mole %, a crystallinity of 4 to 20%, a maximum peak temperature of melting of at least 100.degree. C., an MFI of less than 0.01 at 230.degree. C., an HLMFI/MFI of at least 35, an Mw/Mn of at least 4, and a tensile strength at break of at least 100 kg/cm.sup.2, and 95-0% by weight of an ethylene-propylene-nonconjugated diene copolymer. The rubbery component in the cured product has a gel content more than 80 wt. % and less than 97 wt. % as determined by immersion in cyclohexane at 23.degree. C. for 48 hours.

Thermoplastic elastomer

Polyether sulfone imide copolymers having excellent mechanical strength, heat resistance and heat aging resistance and enhanced processability are disclosed, which are composed of recurring units of the following formulae (I) and (II) ##STR1## wherein Ar.sup.1 represents a residue of a dihydric phenol, Ar.sup.2 represents a residue of an aminophenol, and Ar.sup.3 represents a residue of an aromatic tetracarboxylic acid.

Novel polyether sulfone imide copolymers

Chlorine containing polyether sulfone polymers and preparation thereof

A resin composition having superior mechanical properties, especially high impact strength, which comprises (A) a norbornene-type polymer obtained by ring-opening polymerization of 5-cyano-bicyclo[2,2,1]heptene-2 or a mixture thereof with a small amount of a cycloolefin-type compound in the presence of an unsaturated polymer having a carbon-carbon double bond in the molecule and (B) a vinyl chloride homopolymer or copolymer.

Resin compositions having superior mechanical properties

Processes for preparing novel polymers containing carboxyl or carboxylate groups which comprises hydrolyzing starting polymers containing acid anhydride groups in the presence of acids or alkalies, the starting polymers being prepared by ring-opening polymerization of acid anhydride-type norbornene derivatives, and the characteristics and utility of these novel polymers are disclosed.

Novel polymer containing cyclopentanylvinylene units

A method of polymerizing imide type norbornene derivatives which comprises the ring-opening polymerization of imide type norbornene derivatives containing at least one N-substituted cyclic imide group or a mixture consisting of said norbornene derivatives as the main component and cycloolefins in the presence of a catalytic system comprising organic aluminum compounds and tungsten and/or molybdenum compounds.

Growing community of inventors

Oita, Japan

Shigeru Kurosawa