PROCESS FOR CRYSTALLIZING AT LEAST A PORTION OF A CRYSTALLIZABLE CONDENSATION HOMOPOLYMER TO FORM SOLID PARTICLES

摘要

A process for forming solid particles comprising the steps of: combining in molten form a major component of a crystallizable condensation homopolymer a nd a minor component of a non-crystallizable condensation polymer, wherein the crystallizable condensation homopolymer and the non-crystallizable condensation polymer each have a degree of polymerization of 10 to less than 48 prior to the combining; mixing the combined crystallizable condensation homopolymer and non-crystallizable condensation polymer in molten form to fo rm a mixture that comprises 10 to 30 mol% of the non-crystallizable condensatio n polymer; forming the mixture into droplets; exposing the droplets to a therm al environment which results in the bulk of the droplet reaching within 15 seconds a temperature within .plusmn.10 ~C of the temperature at which the maximum rate of crystallization of the crystallizable condensation homopolym er occurs; and crystallizing at least a portion of the crystallizable condensation homopolymer in the mixture to form solid particles.