Method of preparing coated pigment particles and the product...

Details Method of preparing coated pigment particles and the product... Method of preparing coated pigment particles and the product...

C - Chemistry, Metallurgy

08

K

6/194, 117/45

C08K 9/10 (2006.01) C09B 67/00 (2006.01) C09C 3/08 (2006.01)

Patent

CA 1086574

METHOD OF PREPARING COATED PIGMENT PARTICLES AND THE PRODUCT PRODUCED THEREBY Abstract of the Disclosure A method of preparing coated pigment particles for dry compounding with a polymeric material such as plastic or rubber, which method comprises the steps of providing particles of a hydrophilic color pigment, mixing the pig- ment particles with a wax having a given boiling point temperature and a brittle condition below à given lower temperature, heating the mixture above a process tempera- ture substantially above the melting temperature and sub- stantially above the boiling point of water to boil away entrapped water, subjecting the mixture to high shear mix- ing while at the process temperature, cooling the mixture to a temperature below the given lower temperature to pro- duce a solid mass, and, then, breaking the solid mass into flakes.

274170

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