PROCESS FOR THE PRODUCTION OF ELASTIC MOLDINGS

摘要

Mo-2799-Ca LeA 23,867-Ca A PROCESS FOR THE PRODUCTION OF ELASTIC MOLDINGS The present invention is directed to a process for the production of optionally cellular, elastomeric moldings having a density of about 0.8 to 1.4 g/cm3 and a sealed surface layer based on polyurea elastomers optionally containing urethane groups which re prepared from a) di- or polyisocyanates based on diisocyanatodiphenylmethane which are liquid at room temperature, and b) solutions of alkyl-substituted diamines as chain lengthening agents in compounds having an average molecular weight of about 1800 to 12,000 which contain at least two isocyanate-reactive groups wherein components a) and b) are processed as a one shot system according to the reaction injection molding process and the moldings are released from the mold after a period in the mold of about 5 to 60 seconds and the mold is maintained at a temperature of at least 105.degree.C. Mo-2799-Ca