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US 5,523,341 AGranted
Polyoxymethylene resin compositions having improved weatherability
AssigneeE. I. Du Pont de Nemours and Company
InventorsToshikazu Kobayashi, Ken-ichi Shinohara
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Abstract
The present invention is aimed at improving the weathering resistance of a polyoxymethylene resin without adversely affecting its excellent mechanical properties. The invention comprises incorporating into polyoxymethylene a UV absorber and/or a light stabilizer, along with a grafted copolymer containing epoxy-containing olefinic monomer units and/or a polymer containing oxazolyl groups.
Claims5
A composition consisting essentially of
- (a) a polyoxymethylene,
- (b) 0.1-30 weight percent of a vinyl polymer containing oxazolyl-containing olefinic monomer units, and
- (c) 0.01-5 weight percent of at least one compound selected from the group consisting of UV absorbers, hindered amine light stabilizers, and mixtures thereof, with the weight percent ranges being based upon 100 parts by weight of the polyoxymethylene.
Dependencies are inferred from the claim text.