Composition with enhanced heat resistance property

Details Composition with enhanced heat resistance property Composition with enhanced heat resistance property

C - Chemistry, Metallurgy

08

K

C08K 5/20 (2006.01) C08K 5/00 (2006.01) C08K 5/30 (2006.01) H01B 3/44 (2006.01)

Patent

CA 2587944

Compositions including a polymer, a primary antioxidant, a secondary antioxidant, and a metal deactivator selected from at least one of 2,2'- oxamido bis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and oxalyl bis(benzylidenehydrazide), are disclosed. The compositions can also include a light stabilizer. The compositions can be used to manufacture insulations for wire and cable. The compositions have improved long-term heat aging and also retain their color when exposed to heat. A method of making an insulation for a conductor, such as a wire or a cable, made from a composition is also provided.

L~invention décrit des compositions incluant un polymère, un antioxydant principal, un antioxydant secondaire et un désactivateur de métaux étant au moins l~un parmi le 2,2'-oxamido-bis[éthyl-3-(3,5-di-tert-butyl-4-hydroxyphényl)propionate] et l~oxalyl-bis(benzylidènehydrazide). Les compositions peuvent également inclure un photostabilisant ; elles peuvent être utilisées pour fabriquer des isolants de fils et de câbles. Les compositions présentent un vieillissement à la chaleur à long terme amélioré et conservent leur couleur lorsqu~elles sont exposées à la chaleur. L~invention concerne également un procédé de fabrication, à partir d~une composition de l~invention, d~un isolant pour un conducteur tel qu~un fil ou un câble.

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