Olefin polymer composition having low smoke generation and...

C - Chemistry – Metallurgy – 08 – L

Patent

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400/9444

C08L 23/02 (2006.01) C08J 5/18 (2006.01) C08K 3/22 (2006.01) C08K 3/34 (2006.01) C08K 5/00 (2006.01) C08K 5/1535 (2006.01) C08K 5/32 (2006.01) C08K 5/526 (2006.01) C08K 5/5353 (2006.01) C08K 13/02 (2006.01) C08L 23/10 (2006.01) D01F 6/04 (2006.01)

Patent

CA 2236634

A polymer composition and fiber, film or sheet prepared therefrom, which contains (i) an olefin polymer containing an acid neutralizing agent other than a metallic salt of a saturated or unsaturated fatty acid, and ii) a stabilizer system distributed throughout the polymer, the stabilizer system including (a) a phosphite selected from 2,2',2"-nitrilo[triethyl-tris(3,3',5,5'- tetra-tert.butyl-1,1-biphenyl-2,2'-diyl)phosphite] and tris(2,4-di- tert-butylphenyl) phosphite; and (b) a N,N-dialkylhydroxylamine. Also disclosed is a method for preparing a polyolefin fiber, film or sheet, which includes adding the above stabilizer to an olefin polymer containing an acid neutralizing agent other than a metallic salt of a saturated or unsaturated fatty acid, thereby producing a stabilized olefin polymer; and extruding the stabilized olefin polymer through a die.

Divulgation d'une composition polymérique et de fibres, de films ou de feuilles préparés à partir de celle-ci, contenant i) un polymère oléfinique contenant un agent neutralisateur d'acide autre qu'un sel métallique d'acide gras saturé ou insaturé, et ii) un système stabilisant distribué dans tout le polymère, ce système stabilisant comprenant a) un phosphite choisi entre le 2,2',2"-nitrilo¢triéthyl-tris(3,3',5,5'- tétra-tertbutyl-1,1-biphényl-2,2'-diyl)phosphite! et le tris(2,4-di-tert-butylphényl)phosphite; et b) une N,N-dialkylhydroxylamine. On divulgue aussi une méthode de préparation de fibres, de films ou de feuilles en polyoléfine, comprenant l'addition du stabilisant décrit ci-dessus à un polymère oléfinique contenant un agent neutralisateur d'acide autre qu'un sel métallique d'acide gras saturé ou insaturé, et produisant ainsi un polymère oléfinique stabilisé; et l'extrusion du polymère oléfinique stabilisé au travers d'une filière.

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