Nylon molding compositions exhibiting improved protection...

Details Nylon molding compositions exhibiting improved protection... Nylon molding compositions exhibiting improved protection...

C - Chemistry, Metallurgy

08

L

400/5810, 400/78

C08L 77/00 (2006.01) C08K 5/134 (2006.01) C08K 5/3435 (2006.01) C08K 5/527 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01) C08L 77/10 (2006.01)

Patent

CA 2027802

Nylon molding compositions, and molded parts formed of the same, include a UV-light stabilization system having between about 0.5 to about 1.0 wt.% of a hindered phenolic antioxidant, between about 0.05 to about 1.5 wt.% of a phosphate compound, between about 0.05 to about 1.5 wt.% of a hindered amine light stabilizer, and optionally, between about 0.05 to about 5.0 wt.% of a benzotriazole UV absorber. The nylon molding compositions and molded parts formed thereof exhibit improved color difference, as calculated in CIELab units under illuminant "D-65" according to ASTM Standard D-2244, of less than about 1.5 when exposed to 601.6 kJ/m2 irradiation in a Xenon arc weatherometer operated according to SAE J1885, and improved surface gloss retention characteristics after such irradiation.

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