Polymer particle composition and process for producing the same

Details Polymer particle composition and process for producing the same Polymer particle composition and process for producing the same

C - Chemistry, Metallurgy

08

J

C08J 3/16 (2006.01) C08F 2/00 (2006.01)

Patent

CA 2513407

Rigid thermoplastic polymer particles for molding which can eliminate all of the problem concerning fine particles attributable to suspension polymerization processes, problem concerning the reduction of energy consumption for drying peculiar to emulsion polymerization processes, and problem concerning compounding operation by processors. The thermoplastic polymer particles for molding are obtained by coating 100 parts by weight of polymer particles produced by suspension polymerization which have a glass transition temperature of 60~C or higher and an average particle diameter of 50 to 500 ~m with 5 to 22 parts by weight, excluding 22 parts by weight, of a polymer produced by emulsion polymerization.

L'invention concerne des particules polymères thermoplastiques rigides pour moulage qui permettent de supprimer à la fois le problème des particules fines dans les processus de polymérisation en suspension, le problème posé par la réduction de la consommation d'énergie lors du séchage, propre aux procédés de polymérisation en émulsion, et le problème lié aux opérations de mélange effectuées par des appareils de traitement. On obtient ces particules polymères thermoplastiques pour moulage en enrobant 100 parties en poids de particules polymères produites par polymérisation en suspension, présentant une température de transition vitreuse égale ou supérieure à 60 ·C et un diamètre moyen de particule compris entre 50 et 500 µm, avec 5 à 22 parties en poids (à l'exclusion de 22 parties en poids) d'un polymère produit par polymérisation en émulsion.

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