Resinous polymeric substances

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant

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Details

75 2, 209166, 528228, 528229, 528269, C08G 1206

Patent

active

043306675

ABSTRACT:
A resinous polymeric substance for use as an aid in froth flotation characterized by its mean molecular weight, elemental analysis, viscosity and infra-red spectrum. A method of making the substance by reacting a carbonyl compound with an amine or ammonia followed by heating; and a method of froth flotation in which the substance is used as an aid. The substance has a mean molecular weight in the range 250-10 000; it includes carbon, hydrogen, nitrogen and oxygen; it has a viscosity of 10 000 to 100 000 centipoise at 20.degree. C. and 100 to 1 000 centipoise at 70.degree. C.; and it has an infra-red spectrum including bands characteristic of the groups --C.dbd.N--, >N--H and >C.dbd.C<.

REFERENCES:
patent: 3461100 (1969-08-01), Payne et al.
patent: 3493522 (1970-02-01), Webb
patent: 3503739 (1970-03-01), Dubosc et al.
patent: 3506613 (1970-04-01), Bayer
patent: 3965070 (1976-06-01), Wuchter

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