Patent ID: 7157113
Filing Date: 2007-01-02
Classification: C01P,C08J,C09C,Y10T

Abstract:
1. A method for encapsulating an inorganic component in a wax, which comprises the following steps: i) subjecting an inorganic component to shearing forces such that deagglomeration of the inorganic component takes place, which subjecting is carried out in the presence of a wax to form a mixture of the inorganic component and the wax, with the wax functioning as a spacer to prevent reagglomeration of the inorganic component, ii) subsequently increasing the temperature of the mixture from step i) to a value above the melting temperature of the wax, iii) quickly cooling outside the extruder the mixture obtained in step ii), and iv) reducing the solidified mixture from step iii) so as to obtain a wax comprising an inorganic component, wherein steps i)–ii) are carried out in an extruder, with the extruder comprising a cooled zone and a heated zone, in which cooled zone step i) is carried out.