| abstract |
This patent describes the composition created based on chlorinated 4,4'-methylenebisanilines for p-phenylmethylenediisocyanate pre-polymers for cast polyurethane elastomers which contains the mixture consisting of 4,4'-methylene bis(2,3-dichloro-6-ethylaniline), 4,4'- -methylenebis(3-chloro-2,6-diethylaniline),2',3,3',6-tetrachloro- -2,6'-diethyl-4,4'-methylenedianiline included with 3,3',6'- -trichloro-2,2',6-triethyl-4,4'-methylenedianiline, while the molar ratio of the above mentioned components is 22,8 - 44,6 : 1,1 - 1,5 : 2,2 - 5,9 or 2,3,3'-trichloro-2,6,6'- -triethyl-4,4'-methylenedianiline alone. |