Daicel Chemical Industries, Ltd.

Naoki Nakashima

Shoji Watanabe

Takuya Miho

Yoshiyuki Ikemoto

Tomohisa Isobe

Takaaki Murai

Kimio Inoue

Michio Nakanishi

Motoshi Ishikura

Yoshihide Ozawa

Tadaaki Miyano

Process for preparing modified porous membrane

A process for producing a lactone polymer which comprises reacting an ester compound synthesized from an alcohol and an acid or acid anhydride thereof with a lactone and a ring-opening polymerization initiator without being accompanied by condensation. The thus produced lactone polymer is effective for preventing shrinkage of thermosetting resins, particularly unsaturated polyester resins.

Process for producing lactone polymer and an anti-shrinking

A synthetic resin composition comprises (A) 100 parts by weight of polycaprolactone and (B-1) 10 to 70 parts by weight of a thermoplastic resin and 1 to 30 parts by weight of a tackifier, or (B-2) 10 to 70 parts by weight of a chlorinated polyolefin.

Polycaprolactone composition

A polyurethane having excellent elastic recovery is obtained by reacting an organic diisocyanate with a polycaprolactone polyester-diol prepared from a dihydric alcohol, a dibasic acid, an ester thereof or an anhydride thereof and .epsilon.-caprolactone or/and hydroxycaproic acid and having a hydroxyl value of 35 to 150 KOH mg/g and a content of .epsilon.-caprolactone and hydroxycaproic acid of 69 to 95% by weight.

Polyurethane having excellent elastic recovery and elastic filament of

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Ohtake, Japan

Naoki Nakashima