C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 279/06 (2006.01) C08K 5/13 (2006.01) C08K 5/3492 (2006.01) C08K 5/36 (2006.01) C08K 5/375 (2006.01) C08K 5/38 (2006.01)
Patent
CA 2537072
The instant invention relates to a stabilized composition of methylmethacrylate-butadiene-styrene graft copolymers with selected sterically hindered phenolic antioxidants and thioethers. Further subjects of the invention are a process for the stabilization of methylmethacrylate-butadiene- styrene graft copolymers and the use of selected sterically hindered phenolic antioxidants together with a thioether for the thermal stabilization of said graft copolymer.
La présente invention concerne une composition stabilisée de copolymères de greffe méthylméthacrylate-butadiène-styrène avec des antioxydants phénoliques encombrés stériquement et des thioéthers. L'invention concerne également un procédé de stabilisation des copolymères de greffe méthylméthacrylate-butadiène-styrène et l'utilisation d'antioxydants phénoliques stériquement encombrés sélectionnés, ainsi qu'un thioéther destiné à la stabilisation thermique de ce copolymère de greffe.
Wegmann Alex
Xanthopoulos Pascal
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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