C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/78 (2006.01) C08G 63/80 (2006.01) C08G 63/88 (2006.01) C08J 3/00 (2006.01) C08L 67/00 (2006.01) C08L 67/02 (2006.01)
Patent
CA 2484520
A process for forming solid particles comprising the steps of: combining in molten form a major component of a crystallizable condensation homopolymer and 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 form a mixture that comprises 10 to 30 mol% of the non-crystallizable condensation polymer; forming the mixture into droplets; exposing the droplets to a thermal 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 homopolymer occurs; and crystallizing at least a portion of the crystallizable condensation homopolymer in the mixture to form solid particles.
L'invention concerne un procédé de formation de particules solides consistant à: combiner sous forme fondue un composant principal d'un homopolymère de condensation cristallisable et un composant auxiliaire d'un polymère de condensation non cristallisable, l'homopolymère et le polymère ayant chacun un degré de polymérisation de 10 à moins de 48 avant la combinaison: mélanger l'homopolymère de condensation cristallisable et le polymère de condensation non cristallisable combinés sous forme fondue afin d'obtenir un mélange renfermant entre 10 à 30 % mol du polymère de condensation non cristallisable; former le mélange et obtenir des gouttelettes; exposer celles-ci à un environnement thermique dont le volume de la gouttelette atteint en 15 secondes une température différente de plus ou moins 10 ·C de la température à laquelle la vitesse maximale de cristallisation de l'homopolymère de condensation cristallisable a lieu; et cristalliser au moins partiellement l'homopolymère de condensation cristallisable dans le mélange afin d'obtenir des particules solides.
Kapur Vivek
Leffew Kenneth Wayne
Rajendran Govindasamy Paramasivan
Bennett Jones Llp
Invista Technologies S.a.r.l.
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