Grafting of a polyamide powder by means of gamma irradiation

Details Grafting of a polyamide powder by means of gamma irradiation Grafting of a polyamide powder by means of gamma irradiation

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01) C08L 77/02 (2006.01)

Patent

CA 2534231

The invention concerns a process for the manufacture of polyamide, copolyamide, polyolefin or copolyesteramide powder particles or fluorocarbon resins surface grafted by at least one functionalized graft monomer characterized in that it includes, a) a step consisting in mixing particles of polyamide or copolyamide powder with the functionalized graft monomer, then, b) a step consisting in photonic (.gamma) or electronic (.beta) irradiation of the powder impregnated with functionalized graft monomer resulting from step a), this at a rate of between 0.5 and 15 Mrad. The invention also concerns the particles thus grafted and the compositions containing said particles.

L'invention a pour objet un procédé de fabrication de particules de poudre de polyamide, copolyamide, polyoléfine, copolyesteramide ou des résines fluorocarbonées greffées en surface par au moins un monomère de greffage fonctionnalisé caractérisé en ce qu'il comprend : a) une étape de mélange des particules de poudre de polyamide ou copolyamide avec le monomère de greffage fonctionnalisé puis ; b) une étape d'irradiation photonique (.gamma.) ou électronique (.beta.) de la poudre imprégnée de monomère de greffage fonctionnalisé issue de a), ceci sous une dose comprise entre 0,5 et 15 Mrad. L'invention concerne également les particules ainsi greffées et les compositions contenant de telles particules.

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