Thermoplastic wear resistant compositions, methods of...

C - Chemistry – Metallurgy – 08 – L

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C08L 69/00 (2006.01) C08L 83/10 (2006.01)

Patent

CA 2588763

Disclosed herein is a composition comprising a polycarbonate resin; a polycarbonate~polysiloxane copolymer; and an anhydride modified polyolefin. Disclosed herein too is a composition comprising a blend of a polycarbonate resin with a polycarbonate~polysiloxane copolymer; and an anhydride modified polyethylene, wherein the composition has a wear factor of less than or equal to about 350 in5min/ftlb-hr and an impact strength of greater than or equal to about 500 joules per meter, and wherein the wear factor is measured according to the formula: Wear Factor= [(6.1 x10 8 )(W)]/[(PxV)x (D) x (T)] where P is the applied pressure in pounds per square inch and V is the velocity in feet per minute, W is the weight loss in grams, D is the density in grams per cubic centimeter and T represents 100 hours.

Composition qui renferme une résine de polycarbonate ; un copolymère de polycarbonate-polysiloxane; et une polyoléfine modifiée par anhydride. Egalement, composition qui renferme un mélange de résine de polycarbonate et un copolymère de polycarbonate-polysiloxane; et un polyéthylène modifié par anhydride, ladite composition ayant un facteur d'usure inférieur ou égal à environ 350 in5min/ftlb-hr et une résistance à l'impact supérieure ou égale à environ 500 joules par mètre, sachant que le facteur d'usure est mesuré selon la formule Facteur d'usure= [(6,1 x10 8)(W)]/[(PxV)x (D) x (T)], dans laquelle P est la pression appliquée en livres par pouce carré et V est la vitesse en pieds par minute, W la perte de poids en grammes, D la densité en grammes par centimètre cube et T une valeur de 100 heures.

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