Stabilizing mixtures for organic polymers

Details Stabilizing mixtures for organic polymers Stabilizing mixtures for organic polymers

C - Chemistry, Metallurgy

08

K

C08K 5/00 (2006.01) C08K 5/13 (2006.01) C08K 5/3435 (2006.01) C08K 5/3445 (2006.01) C08K 5/49 (2006.01) C08K 5/54 (2006.01)

Patent

CA 2403923

Stablizing mixtures for organic polymers comprising: (a) at least one compound belonging to the group of 3-pyra- zolidinones; (b) at least one compound belonging to the group of organic phosphites or phosphonites; (c) at least one compound belonging to the group of sterically hindered phenols; and, optionally, (d) at least one compound belonging to the group of sterically hindered amines. The above mixtures can be used as stabilizers of organic polymers to degradation caused by oxygen, heat and/or light.

L'invention concerne des mélanges stabilisateurs destinés à des polymères organiques. Lesdits mélanges contiennent (a) au moins un composé appartenant au groupe des 3-pyrazolidinones, (b) au moins un composé appartenant au groupe des phosphites ou phosphonites organiques, (c) au moins un composé appartenant au groupe des phénols à encombrement stérique, et éventuellement (d) au moins un composé appartenant au groupe des amines à encombrement stérique. Lesdits mélanges peuvent être employés en tant que stabilisateurs destinés à stabiliser des polymères organiques contre la dégradation provoquée par l'oxygène, la chaleur et/ou la lumière.

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