PROCESSO APERFEICOADO PARA PREPARAR UM POLIMERO QUE CONTEM N-(2,2,6,6-TETRA-ALQUIL-4-PIPERIDINIL)-IMIDA,COMPOSICAO,PROCESSO PARA A UNIAO DE COMBINACOES DE POLI-ALQUIL-PIPERIDINAS-AMINO-SUBSTITUIDAS,E POLI-(OXIALQUILENOS)E PROCESSO PARA A PREPARACAO DE COPOLIMEROS DE MALEIMIDA

摘要

N-(2,2,6,6-tetraalkyl-4-piperidinyl)imide containing polymer is prepared by blending together a mixture of a polymer containing anhydride functions and a 4-amino-2,2,6,6-tetraalkylpiperidine or its 1-alkyl or 1-acyl derivatives and heating said materials in the blend, either prior to or during the blending step to the molten stage of the polymer; thereafter, heating said blend above 180 DEG C for a sufficient time to form the product. All volatile by-products are removed either simultaneously or concurrently with the above 180 DEG C heating step.