A process for preparing unsaturated Polyester Cris Talino

摘要

Process for preparing a Crystalline unsaturated polyester.Consists in reacting an unsaturated Polyester mainly completed in Hydroxy in Molten State or in Solution, optionally in the presence of a catalyst with a diisocyanate in NCO / Oh ratio between 1: 1 and 1: 3,Where the resulting isocyanate Prepolymer terminated with an excess of - NCO on optional Oh is further reacted with a compound selected from diols and diamines compounds that have both a group that reacts with isocyanate as other functional Group; where the Polyester pa 55.01 finished in hydroxy acid has an index,Between 10 and 20 hydroxyl Index between 550 and a degree of unsaturation and between 1 and 5 mol per 1000 g Polyester Double Bonds. They are useful as Adhesives, and Molding Powders.