A production method comprising the step of charging prepolymer, a foaming agent and an active hydrogen-containing compound in specified amounts into a tank and foaming/mixing them for a specified time by a mixer, and the subsequent step of pouring the mixture liquid into a metal mold.

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US Patent 7455799 Method of producing polishing pad-use polyurethane foam and polyurethane foam

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Find more entities like US Patent 7455799 Method of producing polishing pad-use polyurethane foam and polyurethane foam