Process for condensing at least one epoxide on at least one cyclic anhydride in the presence of a catalyst consisting of at least one titanium nitrogenous complex

US5030711A · kind A · utility

Assignees

• INSTITUT FRANCAIS DU PETROLE · FR
• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR
• Elf France · FR

Inventors

• Valerie Bagrel · Fontenay-aux-Roses, FR
• Jacques Garapon · Val-de-Reuil, FR
• Remi Touet · Yssingeaux, FR
• Catherine Huet · Chalon-sur-Saône, FR
• Bernard Damin · Oullins, FR

Key dates

• Filing date: Mar 12, 1990
• Grant date: Jul 9, 1991
• Expiry date: Mar 12, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/58
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for condensing at least one epoxide on at least one cyclic anhydride of a dicarboxylic acid in the presence of a catalyst consisting of at least one titanium nitrogenous complex of the formula (I) Ti(OR.sup.1).sub.m (OR.sup.2 ).sub.n (OR.sup.2 ).sub.p Lg in which R.sup.1, R.sup.2 and R.sup.3 each independently represents one hydrocarbon group, L represents the remainder of a nitrogenous compound, the sum of m+n+p+q is 4, q is an integer from 1 to 4 and m, n and p are independently each 0 or 1. The process allows for obtaining a perfectly alternating polyester.