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METHOD FOR MANUFACTURING POLYESTERPOLYOL WITH INCREASED FUNCTIONAL GROUPS USING POLYETHYLENE TEREPHTALATE CHIPS WITH EXCELLENT COMPRESSIVE STRENGTH, BENDING STRENGTH, AND THERMAL CONDUCTIVITY
METHOD FOR MANUFACTURING POLYESTERPOLYOL WITH INCREASED FUNCTIONAL GROUPS USING POLYETHYLENE TEREPHTALATE CHIPS WITH EXCELLENT COMPRESSIVE STRENGTH, BENDING STRENGTH, AND THERMAL CONDUCTIVITY
PURPOSE: A method for manufacturing polyesterpolyol is provided to prepare polyesterpolyol with increased functional groups and to improve mechanical properties, shrinkage, dimensional stability, and insulation properties.;CONSTITUTION: A method for manufacturing polyesterpolyol with increased functional groups comprises the steps of: (i) reacting 100 parts by weight of polyethylene terephthalate chips, 30~120 parts by weight of glycol, 0.01~10 parts by weight of catalysts, and 5~30 parts by weight of pentaerythritol or sorbitol; and (ii) adding 20~40 parts by weight of polybasic acids based on 100 parts by weight of polyethylene terephthalate chips to the reactant to prepare polyesterpolyol.;COPYRIGHT KIPO 2012
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