POLYETHER EXHIBITING LOW GAS PERMEABILITY HAVING CONSTANT SIZE AT INCREASED TEMPERATURE

摘要

FIELD: polymeric materials. SUBSTANCE: invention relates to polyether EXHIBITING oxygen permeability from about 0.2 to about 4.9 cm³/100 inchs²-24 h-atm at 23 C and relative humidity 100% (from the inside) and relative humidity 60% (on the outside) and recrystallization enthalpy from 0 to -2.1 cal/g and linear size contraction from about 0% to about 6% at heating from about -60 C to about 200 C. Invention provides also process of synthesis of this polyether and manufacture process of article made of its. Crystalline polyether article can be used as container for foodstuffs that were used both microwave and usual furnaces and/or for the frozen foodstuffs; article exhibits good properties of gas barrier and size stability after pressing at temperature from about -60 C to about 200 C. EFFECT: enhanced quality of polyether.