Improved self-lubricating thermoplastic polymer composition

Details Improved self-lubricating thermoplastic polymer composition Improved self-lubricating thermoplastic polymer composition

C - Chemistry, Metallurgy

08

L

C08L 23/00 (2006.01) C08K 5/098 (2006.01) C08K 5/134 (2006.01) C08K 5/20 (2006.01) C08L 33/00 (2006.01)

Patent

CA 2212795

A self-lubricating composition containing at least about 70 to about 99.5 weight percent of a thermoplastic polymer and from about 30 to about 0.5 weight percent of a lubricating system, wherein the lubrication system contains high and low molecular weight polyethylenes, polyethylene waxes, metal salts, antioxidants and stabilizers. The composition is suitable for the fabrication of shaped articles, e.g., gears, pulleys, rollers and bearings, which exhibit improved friction and surface wear properties.

L'invention porte sur une composition auto-lubrifiante contenant au moins entre environ 70 et 99, 5 % en poids d'un polymère thermoplastique et d'environ 30 % à environ 0,5 % en poids d'un système lubrifiant, lequel contient des polyéthylènes à poids moléculaire élevé et faible, des cires de polyéthylène, des sels métalliques, des anti-oxydants et des agents stabilisants. Cette composition se prête à la fabrication d'articles formés tels que des roues, poulies, rouleaux et paliers, présentant des propriétés améliorées de résistance au frottement et à l'usure superficielle.

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