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METHOD FOR PRODUCING A FOAMED PLASTIC WITH HIGH SOLVENT AND HEAT RESISTANCE
METHOD FOR PRODUCING A FOAMED PLASTIC WITH HIGH SOLVENT AND HEAT RESISTANCE
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机译:制备具有高溶剂和耐热性的发泡塑料的方法
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摘要
A process for producing a foamed polymer comprises the steps of: mixing, in a dissolver, a mixture constituted by at least one isocyanate and a first unsaturated anhydride, adding to the mixture, a second aromatic anhydride, at least one foaming agent, a vinylidene compound, poly(vinyl chloride) and a heat stabilizer; until a paste is obtained curing said paste at atmospheric pressure, and at a temperature not higher than 80 DEG C; completing the curing of the paste-like mixture under pressure, by increasing temperature up to 180 DEG C and subsequent cooling, until partially foamed germs are obtained; and completing the germ foaming process, by heating.
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