Process for preparing polyarylates

C - Chemistry – Metallurgy – 08 – G

Patent

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402/187, 400/301

C08G 63/00 (2006.01) C08G 63/193 (2006.01) C08G 63/78 (2006.01) C08G 63/83 (2006.01) C08G 63/90 (2006.01) C08K 3/00 (2006.01) C08L 67/03 (2006.01)

Patent

CA 1210890

- 25 - ABSTRACT OF THE DISCLOSURE An improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm comprising 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 carrying out said process in the presence of a particular solid adsorbent.

430181

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