Stabilizer blend for improved chlorine resistance

Details Stabilizer blend for improved chlorine resistance Stabilizer blend for improved chlorine resistance

C - Chemistry, Metallurgy

08

K

C08K 5/00 (2006.01) C08K 5/13 (2006.01) C08K 5/18 (2006.01)

Patent

CA 2606037

A method for increasing the stability of a thermoplastic resin in the presence of water is disclosed wherein said method comprises adding to said resin a stabilizing amount of a blend of: (A) at least one aromatic amine antioxidant; and (B) at least one sterically hindered phenol antioxidant. Such stabilized resins, which are preferably high density polyethylene, are especially useful for the fabrication of pipes for the transport of water, particularly chlorinated potable water.

L'invention concerne une méthode pouvant améliorer la stabilité d'une résine thermoplastique, en présence d'eau. La méthode consiste à ajouter à la résine une quantité stabilisatrice d'un mélange de: a) au moins un antioxydant amine; et b) au moins un antioxydant phénolique stériquement entravé. De telles résines stabilisées, de préférence des polyéthylènes haute densité, sont particulièrement utiles pour la fabrication de tuyaux destinés à l'adduction d'eau, notamment l'eau potable chlorée.

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