DECOMPOSING POLYMERS USING NOR-HALS COMPOUNDS

摘要

PCT No. PCT/EP97/03133 Sec. 371 Date Dec. 14, 1998 Sec. 102(e) Date Dec. 14, 1998 PCT Filed Jun. 17, 1997 PCT Pub. No. WO97/49737 PCT Pub. Date Dec. 31, 1997A method is described for the decomposition of polymers, especially waste plastics and used plastics, in which so-called NOR-HALS compounds-that is, for example, compounds comprising the group in which R* is C1-C20alkyl, OH-substituted C1-C20alkyl, optionally C1-C4alkyl-substituted C5-C12cycloalkyl or O- or S-interrupted C2-C20alkyl-are added and heating is carried out at temperatures which lie above the customary processing temperatures for polymers (280 DEG C. or more).