| http://www.w3.org/ns/prov#value | - According to the present invention, some stocks selected from a group consisting of polyol, organic isocyanate, amine catalyst, silicone oil, tin catalyst, water (used as foaming agent), pigment, physical-property improver such as filler, and other components usually used in preparing a polyurethane foamable reaction mixture are mixed, thus forming a polyurethane reaction mixture.
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