General Electric Company

C Seetharaman

Pradeep Jeevaji Nadkarni

Gautam Chatterjee

Gurram Kishan

Dibakar Dhara

Balakrishnan Ganesan

Vinod Kumar Rai

Abbas Alli G Shaikh

Compounds and methods for preparing 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidines having a formula of: wherein Ris independently selected from a group consisting of a hydrocarbyl radical, a nitro radical, and a halogen atom; 'a' is an integer from 0&#x2013;4; and Arand Arare each independently an aromatic radical, are disclosed. The 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compounds are useful for preparing other useful monomers and polymers.

2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compounds and methods for making them

The disclosure provides high quality, low yellowness index copolycarbonates comprising structural units derived from at least one aliphatic diol, at least an aromatic dihydroxy compound and a diaryl carbonate. Also disclosed herein is a method of making such copolycarbonates in presence of one or more catalysts.

Aliphatic diol polycarbonates and their preparation

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Karnataka, India

C Seetharaman