Colorant concentrates for dyeing polyoxymethylene moulding materials
AssigneeTicona LLC
InventorsStefan Disch, Peter Eckardt, Michael Hoffmockel, Karl-Friedrich Mück, Gerhard Reuschel
Life of this patent
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Abstract
Colorant concentrates made from free-flowing polyoxymethylene copolymer as carrier, 15-80% by weight of colorant, 2-15% by weight of nitrogen-containing stabilizer and 0-15% by weight of dispersion aid for coloring pellets or molding compositions made from polyoxymethylene (POM) and for producing colored injection moldings or colored POM extrudates. The products produced with this colorant preparation are particularly stable during processing and have very low formaldehyde emissions.
Claims20
A colorant concentrate for preparing polyoxymethylene molding compsotions with reduced formaldehyde emission, made from 15-80% by weight of colorant selected from the group consisting of carbon black, inorganic pigments and organic pigments, 2-15% by weight, of a nitrogen-containing stabilizer, 0-15% by weight of dispersion aid, and to make up 100% by weight of colorant preparation, free-flowing polyoxymethylene copolymer which may, if desired, also comprise UV stabilizers and other customary additives.
A polyoxymethylene molding composition comprising 0.02-1.5% by weight of colorant, 0.02-0.3% by weight of nitrogen-containing stabilizer and 0.05-0.75% by weight of dispersion aid.
A colorant concentrate for preparing polyoxymethylene molding compositions with reduced formaldehyde emission, made from 20-80% by weight of colorant selected from the group consisting of carbon black, inorganic pigments and organic pigments, 2-10% by weight of a nitrogen-containing stabilizer, 0-10% by weight of dispersion aid and to make up 100% by weight of colorant preparation, free-flowing polyoxymethylene copolymer which may, if desired, also comprise UV stabilizers and other customary additives.
A colorant concentrate for preparing polyoxymethylene molding compositions with reduced formaldehyde emission, made from 20-45% by weight of colorant selected from the group consisting of carbon black, inorganic pigments and organic pigments, 4-10% by weight of a nitrogen-containing stabilizer, 3-5% by weight of dispersion aid and to make up 100% by weight of colorant preparation, free-flowing polyoxymethylene copolymer which may, if desired, also comprise UV stabilizers and other customary additives.
Dependencies are inferred from the claim text.