MIXTURES CONTAINING PREPOLYMERS, WHICH CAN BE CONVERTED TO HEAT-RESISTANT FOAMED PLASTICS

摘要

MIXTURES CONTAINING PREPOLYMERS, WHICH CAN BE CONVERTED TO HEAT-RESISTANT FOAMED PLASTICS A mixture which can be converted to a heat-resistant foamed plastic and which contains a solid blowing agent, a thermoplastic prepolymer of a polyimide of an unsaturated acid an azomethine and a polyamine. On warming, the mixture gives a foamed plastic of high heat resistance and good resistance to chemicals.