Nylon molding compositions exhibiting improved protection agains

Details Nylon molding compositions exhibiting improved protection agains Nylon molding compositions exhibiting improved protection agains

1989-11-28

1995-01-10

Morgan, Kriellion S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 91, 524120, 524291, 524413, 524424, 524425, 524430, 524437, 524439, 524445, 524449, 524451, 524456, 524494, 524495, C08K 53435, C08K 511, C08K 5524

Patent

active

053807740

ABSTRACT:
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 phosphite 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/m.sup.2 irradiation in a Xenon arc weatherometer operated according to SAE J1885, and improved surface gloss retention characteristics after such irradiation.

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Patent Abstracts of Japan, vol. 9, No. 180 (C-293)(1903), Jul. 25, 1985. Plasdoc-Central Patents Index-Basic Abstracts Journal, 1989, London, AN 89-072708 "Polyamide resin compsn.".

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