Japan Synthetic Rubber Co., Ltd.

Seiji Tai

Mitsuo Abe

Masato Kawakami

Minoru Furuichi

Nobuhide Shiraishi

Tetsuo Murata

Shohei Wada

Tsukasa Maeda

A polymer particle produced by forming a layer of filler-free polymer (II) on the surface layer of a filler-containing polymer particle (I) by polymerization of a monomer composed mainly of an ethylenically unsaturated compound in the presence of the polymer particle (I) is suitable for uniformly carrying a biological substance such as an immunoreactive substance, enzyme or cell on its surface because it has no filler in its surface layer, and the physical properties of the filler contained in the polymer particle (I) can be utilized.

Polymer filler particles with filler free coating

A hot melt adhesive composition consisting essentially of 100 parts by weight of polybutadiene having a 1,2-bond structure content of not less than 70% and a crystallinity of not less than 10%, from 50 to 1000 parts by weight of at least one inorganic filler, from 10 to 300 parts by weight of at least one tackifier, and at least one plasticizer and/or at least one flow improving agent, said composition having melt viscosity of from 50 to 50000 poises within a temperature range from 100.degree. to 150.degree. C.

Hot melt adhesive composition for hot melt bonding of fibrous or

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Yokkaichi, Japan

Seiji Tai