| abstract |
Stabilized copolymer compositions comprising an alternating copolymer of carbon monoxide and an olefinically unsaturated compound and from 0.03 to 3.0 %w of a sterically hindered phenolic (blend) compound selected from: 1) bis- and tris-phenolic alkanes, 2) tris-phenolic (alkyl)benzenes, 3 tris-phenolic cyanurates, 4) symmectrical diesters of hydroxyphenyl substituted aliphatic monocarboxylic acids and N,N min -bis(hydroxyalkyl)oxalamide, 5) blends comprising on the one hand specific defined phenolic compounds, and on the other hand aromatic amines and/or compounds of general formula R<1>OOC-(CH2)p-S-(CH2)q-COOR<2> in which p, q, R<1> and R<2> have defined meanings. y |