PLASTIC MATERIAL CONTAINING POLYETHYLENE RESISTING TO THERMAL OXIDATIVE AND PHOTO-OXIDATIVE DEGRADATION

摘要

the plastic material on the basis of polythene, resistance to degradation and fotooxidativa termooxidativa used in agriculture, is composed of polyethylene, a uv absorber,of a class of compound ortohidroxihidroxifenonei substituita in position 4, an additive type amine class derivatilor 4-hydroxy 2,2,6,6,tetraalchilpiperidinei or produsilor polycondensation of derivatives of 4-hydroxy 2,2,6,6, tetraalchilpiperidinei with basic acids having general formula - (ch2) n - hooc cooh,in which n is between 1 and 10 and an antioxidant type octadecul - 3 - (3,5 - tert - butyl - 4 - hydroxyphenyl) propionate or isocyanate tris - (3,5 - di tert butyl 4-hydroxybenzyl)the three ofcomponenti being in molar ratio 1: 1: 0,5 0,1...0,25 amount concentratiilor three components nedepasind 190 reported in polyethylene.