Method for preparing poly(cyclohexane-1,4-dicarboxylate)s from cyclohexane-1,4-dicarboxylic acid, and composition

US6828410B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Daniel J. Brunelle · Scotia, US
• Corrado Berti · Lugo, IT
• Annamaria Celli · Forlì, IT
• Martino Colonna · Bologna, IT
• Maurizio Fiorini · Bologna, IT
• Elisabetta Marianucci · Bologna, IT
• Massimo Messori · Modena, IT
• Francesco Pilati · Bologna, IT
• Laura Sisti · Bologna, IT
• Paola Marchese · Bologna, IT

Key dates

• Filing date: Jul 10, 2002
• Grant date: Dec 7, 2004
• Expiry date: Jan 13, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/82
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Poly(1,4-cyclohexanedicarboxylate)s, especially poly(1,4-cyclohexanedimethylene-1,4-cyclohexanedicarboxylate), are prepared from at least one relatively non-volatile diol, such as 1,4-cyclohexanedimethanol, and cyclohexane-1,4-dicarboxylic acid by an esterification process in the presence of a catalyst, at a maximum temperature of about 260°. In one embodiment the procedure employs a two-step process, the second of which may be performed in the melt or in the solid state. A volatile diol such as ethylene glycol may also be present.