Process for the production of elastic moldings

Details Process for the production of elastic moldings Process for the production of elastic moldings

B - Operations, Transporting

29

C

18/660, 18/715

B29C 67/20 (2006.01) C08G 18/65 (2006.01)

Patent

CA 1255865

Mo-2799-Ca LeA 23,867-Ca A PROCESS FOR THE PRODUCTION OF ELASTIC MOLDINGS ABSTRACT OF THE DISCLOSURE 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°C. Mo-2799-Ca

509132

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