Production of a titania-pigmented polyamide

US7820757B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christoph Plachetta · Schifferstadt, DE
• Manfred Heckmann · Kuantan, MY
• Hans-Harald Hünger · Ellerstadt, DE
• Robert Weiβ · Tauberbischofsheim, DE

Key dates

• Filing date: Oct 18, 2003
• Grant date: Oct 26, 2010
• Expiry date: Jun 1, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/2241
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a method for producing a polyamide containing titanium dioxide pigments. Said method is characterized by the fact that titanium dioxide pigments are dispersed in an initial mixture containing water and caprolactam by means of a device comprising a dispersion chamber, a disk-shaped rotor that is disposed inside said dispersion chamber, a stator that is provided with radial openings, is arranged within the dispersion zone of the dispersion chamber, and is connected to the rotor, a substance inlet located on each side of the rotor, preferably with a respective axial duct section such that the two flows of substance are combined in the peripheral edge area of the rotor disk, and a product outlet which is placed on the outer edge of the dispersion zone of the dispersion chamber, by feeding the titanium dioxide pigments to the dispersion chamber through one of said substance inlets while feeding the initial mixture containing water and caprolactam to the dispersion chamber through the other of said substance inlets, whereby a product mixture containing water, caprolactam, and the used titanium dioxide pigment is obtained via the product outlet, and the product mixture is pol…