POLYURETHANE CURING AGENTS DERIVED FROM 4,4'-METHYLENE-BIS(2-CHLOROANILINE)

摘要

1501319 Formaldehyde condensation products of 4,4SP1/SP-methylene-bis-(2-chloroaniline) IHARA CHEMICAL KOGYO KK 22 Oct 1976 [29 Sept 1976] 43940/76 Heading C2C [Also in Division C3] The invention comprises a mixture having a melting point not greater than 110‹ C. of at least two compounds of the formula wherein n is zero or an integer, which may be obtained by a dehydrocondensation of a mixture of 4,4SP1 /SP- methylene - bis - (2 - chloroaniline) and formaldehyde or a substance capable of producing formaldehyde in situ in a molar ratio of from 1 : 0À01 to 1 : 0À50.