PREPARATION OF UNSATURATED POLYESTERS

• Main Authors: HOUSTON, Katelyn Rose, HE, Hongkun, POWELL, Jeffery Earl Grant
• Format: Patent
• Language: English; French
• Published: 03.08.2023
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention relates to a process for making unsaturated polyester with high fumarate/maleate ratio. In particular, the process comprises making unsaturated polyester with ethylenically unsaturated compound as one of the starting material followed by isomerization using N,N-dimethylacetoacetamide (DMAA) as the catalyst. The polyester has a fumarate/maleate ratio of 90/10 or greater. La présente invention concerne un procédé de fabrication d'un polyester insaturé ayant un rapport fumarate/maléate élevé. En particulier, le procédé comprend la fabrication d'un polyester insaturé avec un composé éthyléniquement insaturé en tant que l'un des matériaux de départ suivi d'une isomérisation à l'aide de N, N-diméthylacétoacétamide (DMAA) en tant que catalyseur. Le polyester a un rapport fumarate/maléate de 90/10 ou plus.