Patent ID: 6512078
Filing Date: 2003-01-28
Classification: C08G

Abstract:
A process for manufacturing polyester, comprised of the following steps:a) esterifying or transesterifying a carboxylic diacid or a carboxylic acid diester with a diol, b) prepolymerizing the esterification or transesterification product in liquid phase to provide an average degree of polymerization of between 10 and 50, c) preparing a dispersion of the prepolymer in a non-solvent of diol and non-swelling of the prepolymer liquid, the prepolymer being present in the dispersion in the form of solid particles having diameters under 2 mm and crystallized, with a crystalline lamella thickness under 17 nm, d) polymerizing in dispersed solid phase, e) recovering solid particles.