Toray Thiokol Company Limited

Toray Fine Chemicals Co., Ltd.

Kazuhisa Sakae

Tomohiro Ooba

Mitsuhiro Okajima

Kouki Echigoya

A curing composition contains a polymer having two or more thiol groups per molecule, a compound having two or more isocyanate groups per molecule, and carbon black, and further contains a filler of which main ingredient is silicic acid or a silicate, or contains an organic filler of which main ingredient is pulverized coal. The curing composition has satisfactory storage stability of base compound and satisfactory curability event after storage of the base compound and, furthermore, gives a cured compound having sufficient strength at break, hardness, and gas-barrier properties. The curing composition is hence suitable for use as a sealant for insulating glass manufacture, vehicle window frames, etc.

Curing composition comprising a polymer having two or more thiol groups per molecule, a compound having two or more isocyanate groups per molecule, carbon black and silicic acid or silicate filler, and/or a pulverized coal filler

The polysulfide polyether of the present invention has in a main chain (i) a polyether moiety represented by --(R.sub.1 O)--.sub.n ; (ii) structural units represented by

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Chiba, Japan

Kazuhisa Sakae