| http://www.w3.org/ns/prov#value | - The best result is usually obtained if this end distillation or polycondensation is run at a pressure of at most 130 Pa and at 240-260???C. for at most 2 hours in the presence of an antioxidant, e.g., sym.di-beta-naphthyl--p-phenylenediamine and 1,3,5-trimethyl-2,4,6-tris[3,5-di-tert-butyl-4-hydroxy-benzyl]benzene.
|
