Purification of crude polyorganophosphazenes

Details Purification of crude polyorganophosphazenes Purification of crude polyorganophosphazenes

1988-10-14

1989-12-26

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528480, 5253264, 525538, C08G 7902

Patent

active

048899100

ABSTRACT:
Crude polyorganophosphazenes, produced by the nucleophilic cosubstitution of polydichlorophosphazenes and contained in a reaction medium which includes such polyorganophosphazenes, reaction solvent for the cosubstitution reaction, excess nucleophilic reagent and/or product of neutralization thereof, and, when present, any alkali metal salts of neutralization, are efficiently and facilely purified, in a single treatment zone, advantageously under agitation in a discontinuous malaxator, by both eliminating the reaction solvent and thereafter washing the resulting reaction medium with a liquid which is a nonsolvent for the polyorganophosphazenes, but miscible with the other products present in said reaction medium.

REFERENCES:
patent: 4720533 (1988-01-01), Pettigrew
patent: 4734471 (1988-03-01), Chang

Affiliated with

Also associated with

Rating

Purification of crude polyorganophosphazenes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Purification of crude polyorganophosphazenes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of crude polyorganophosphazenes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1577792