| 摘要 |
A polyurethane composition is provided for the formulation of a hand exercise device having a variety of configurations. The compositions comprise 14 0 parts by weight of polyol; from about 50 to 70 parts by weight of a diisocyanate compound, the polyols and diisocyanate compounds being selected from the group consisting of reactants capable of forming polyurethanes; from about one to 30 percent by weight of a plasticizer, based upon the weight of the polyurethane composition; and from 0 to about 100 parts by weight of a mineral filler, based upon 100 parts by weight of the polyurethane composition.
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