Production of particulate polyimide polymers

Details Production of particulate polyimide polymers Production of particulate polyimide polymers

1988-12-15

1990-07-24

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528126, 528128, 528172, 528176, 528183, 528229, C08G 6926

Patent

active

049436821

ABSTRACT:
Described is a process for producing, in particulate form, aromatic polyimides based on one or more 2,2-bis[4-(aminophenoxy)-phenyl]hexafluoropropanes. The process involves forming, heating and agitating in a medium composed of dipolar aprotic solvent and liquid aromatic hydrocarbon solvent, a homogeneous solution of a polyamic acid derived from a substantially equimolar mixture of (i) an aromatic tetracarboxylic dianhydride and (ii) a 2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane, such that a separate phase of particulate aromatic polyimide is formed in such medium. The process avoids difficulties caused by the tendency of the wet polyimide polymer to agglomerate into stringy or tacky masses which can foul reactor and agitator surfaces.

REFERENCES:
patent: 4203922 (1980-05-01), Jones et al.
patent: 4413117 (1983-11-01), Reiter et al.

Affiliated with

Also associated with

Rating

Production of particulate polyimide polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1268717