PROCESS FOR THE PREPARATION OF POLYVINYL CHLORIDE HARDE FOAM AND POLYVINYL CHLORIDE HARDE FOAM PREPARED THEREFROM

摘要

PURPOSE: A manufacturing method of polyvinylchloride hard foam is provided to provide polyvinylchloride hard foam having excellent insulation, heat resistance, cold resistance, chemical resistance, self-extinguishing property, mechanical strength, etc. CONSTITUTION: A manufacturing method of polyvinylchloride hard foam comprises: a step of manufacturing a premix resin by mixing organic acid anhydride, reaction initiator, blowing agent AC#7000, a plasticizer dioctylphthalate, a vinylmonomer, BR-105, a secondary blowing agent n-pentane, TM-700R, B8462, polypropylene glycol and pigment, mixing polyvinylchloride into the premix resin, and mixing isocyanate into the mixture; a step of blowing the mixture on a press at 180°C, and curing for 8 minutes; and a step of water-curing the cured material in water of 70-80°C, and drying the cured material. [Reference numerals] (AA) PVC resin, organic anhydride acid, vinyl monomer, organic blowing agent, filler, etc; (BB) Isocyanate-based; (CC) Mixing; (DD) Input of mixing raw material; (EE) Manufacturing PLASTISOL due to an extruder; (FF) Raising temperature and pressurizing-molding; (GG) Oven; (HH) Blowing in oven; (II) Hydrating and blowing; (JJ) Water; (KK) Blowing agent; (LL) Product