US 2003/0195280 A1 · Coloured polyoxymethylene moulding compounds and moulded parts produced therefrom

Abstract

The present invention relates to a polyoxymethylene molding composition comprising (A) 0.1-5.0% by weight of colorant, (B) 0.01-0.5% by weight of a nitrogen-containing stabilizer, (C) 0.05-1% by weight of an ester of a polyhydric alcohol and at least one fatty acid, and (D) 0.001-0.5% by weight of a metal salt of a fatty acid, and (I) polyoxymethylene polymer and, where appropriate, up to 40% by weight of other conventional additives, and variants of this constitution in advantageous versions. In the case of these polyoxymethylene molding compositions the selection of the colorants is no longer restricted to conventional colorants suitable particularly for POM. The products produced therewith are particularly stable during processing and feature low formaldehyde emission, defect-free surfaces, and high color fastness.

Claims31

Dependent claims

A colored polyoxymethylene molding composition comprising

component (A) from 0.1 to 5.0% by weight of colorant,
component (B) from 0.01 to 0.5% by weight of a nitrogen-containing stabilizer,
component (C) from 0.05 to 1% by weight of an ester of a polyhydric alcohol and at least one fatty acid,
component (D) from 0.001 to 0.5% by weight of a metal salt of a fatty acid, and
component (E) up to 1.0% by weight of a metal salt of a short-chain carboxylic acid,
component (F) up to 1.0% by weight of a sterically hindered phenol compound,
component (G) up to 1.0% by weight of at least one stabilizer from the group consisting of the benzotriazole derivatives, or that of the benzophenone derivatives, or that of the aromatic benzoate derivatives,
component (H) up to 0.5% by weight of a sterically hindered amine (HALS) as a light stabilizer,
component (I) polyoxymethylene polymer and, where appropriate, up to 40% by weight of other conventional additives, but where the molding composition does not comprise hydroxides or alkoxides of alkali metals or alkaline earth metals, or their salts with inorganic acids.

6 more elements

Dependencies are inferred from the claim text.

Coloured polyoxymethylene moulding compounds and moulded parts produced therefrom

Life of this patent

Coloured polyoxymethylene moulding compounds and moulded parts produced therefrom

Life of this patent

Abstract

Claims31