Riken Technos Corporation

Bridgestone Sports Co., Ltd.

Riken Vinyl Industry Co., Ltd

Toshimi Yamanaka

Michihisa Tasaka

Takeshi Yuasa

Kouichi Inoue

Yasushi Ichikawa

The present invention is a thermoplastic elastomeric resin granule for powder molding having a longer diameter of 400 &#x3bc;m or less and a ratio of the longer diameter to a shorter diameter of from 3:1 to 1:1, wherein said granule comprises a composition prepared by dynamically vulcanizing

Thermoplastic elastomeric resin granule for powder molding

The present invention provides a thermoplastic resin composition comprising (a) 100 parts by weight of a resin selected from the group consisting of polypropylenes and copolymers composed mainly of propylene, (b) 5 to 350 parts by weight of a resin selected from the group consisting of polyethylenes and copolymers composed mainly of ethylene, the resin having been prepared using a single site catalyst, and (c) 5 to 200 parts by weight of an ionomer resin or its ester. The present thermoplastic resin composition is excellent in mechanical properties and heat bonding property to various resins, and causes no bleeding-out of softening agents, thereby the softness of the shaped articles obtained from the composition can be easily controlled. The present invention also provides a laminated article comprising a layer of the resin composition .

Thermoplastic resin composition

A composition comprising an ionomer resin, a thermoplastic urethane material, and a rubbery elastomer-containing rubbery elastomer composition and having a Shore D hardness of 45 to 63 when molded, is easy to mold and can provide a golf ball cover endowed with excellent resilience, durability and feel upon impact. Golf balls having a cover made of such a composition exhibit excellent rebound characteristics, durability and feel, and are able to achieve a greater distance.

Golf ball cover composition and golf ball

The present invention provides a thermoplastic resin composition comprising (a) 100 parts by weight of a resin selected from the group consisting of polypropylenes and copolymers composed mainly of propylene, (b) 5 to 350 parts by weight of a resin selected from the group consisting of polyethylenes and copolymers composed mainly of ethylene, the resin having been prepared using a single site catalyst, and (c) 5 to 200 parts by weight of an ionomer resin or its ester. The present thermoplastic resin composition is excellent in mechanical properties and heat bonding property to various resins, and causes no bleeding out of softening agents, thereby the softness of the shaped articles obtained from the composition can be easily controlled. The present invention also provides a laminated article comprising a layer of the resin composition.

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Tokyo, Japan

Toshimi Yamanaka