Process for preparing polyarylates

Details Process for preparing polyarylates Process for preparing polyarylates

C - Chemistry, Metallurgy

08

G

402/202, 400/504

C08G 63/19 (2006.01) C08G 63/81 (2006.01) C08L 67/03 (2006.01)

Patent

CA 1173999

IMPROVED PROCESS FOR PREPARING POLYARYLATES ABSTRACT OF THE INVENTION Described herein is an improved process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm which process comprises the following steps: a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and (b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate. wherein the improvement comprises removing residual acid anhydride, after formation of the dihydric phenol diester. so that its concentration is less than about 1500 parts per million. The novel polyarylates produced by the improved process of this invention are melt stable and low in color. S P E C I F I C A T I 0 N D-12,857

383868

Affiliated with

Also associated with

Rating

Process for preparing polyarylates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing polyarylates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing polyarylates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1234328