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Superior Urethane Properties. High quality hard segments Para-Phenylene Diisocyanate (PPDI) Toluene Diisocyanate (TDI) cured with 4,4' methylene bis(3-chloro-2,6-diethylanilne) (MCDEA) Naphthalene 1,5 diisocyanate (NDI) based urethanes . Superior properties are due to the high melting hard segm
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