C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/232, 400/780
C08G 69/18 (2006.01) C08G 69/14 (2006.01)
Patent
CA 1303782
"IMPROVED PROCESS FOR THE ANIONIC POLYMERIZATION OF CAPROLACTRM, AND FOR THE COPOLYMERIZATION THEREOF WITH OTHER LACTAMS" Abstract Process for the production, also continuous, of polycaprolactam, consisting in polymerizing, by the anionic polymerization route, .epsilon.-caprolactam, to which suitable initiators and proper activators have been added, with the optional addition of comonomers, and/or of additives, and/or of pigments, and/or of electro- conductive fillers, and/or of modifying polymers, and/or of inorganic fillers, and/or of reiforcing fibres, by dropwise adding, or anyway adding, with mechanical or convective stirring, under controlled temperature conditions, to dispersing media, wherein the polymerization takes place with polycaprolactam, or copolymers thereof, or composites thereof, being obtained in the form of particles. The granulometric and morphological characteristics of the particles are influenced by the nature, the viscosity, the temperature and the rate of stirring of the dispersing medium, by the rate of feed of caprolactam and of the polymerization ingredients to the dispersing medium, and by the geometry of the polymerization reactor
544502
Canalini Giovanni
Robic
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