Process for preparing diaminodiphenylmethanes

Details Process for preparing diaminodiphenylmethanes Process for preparing diaminodiphenylmethanes

2011-05-17

2011-05-17

Truong, Duc (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

C528S482000, C528S489000, C528S499000, C528S50200C, C528S503000

Reexamination Certificate

active

07943724

ABSTRACT:
Process for preparing diamino diphenyl methane and poly-(diamino diphenyl methane) comprising reacting aniline with formaldehyde in the presence of hydrogen chloride added in the gaseous form wherein the aniline contains 0.1 to 7 wt %, preferably 2 to 5 wt % of a protic chemical, preferably water.

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