Process for preparing granules of pigments by means of double extrusion
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United States of America Patent
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Jul 7, 2020
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N/A
app pub date -
Aug 11, 2016
filing date -
Aug 9, 2006
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Abstract
A process for the production of a particle composition containing, at least one resin and at least one pigment is described, said process comprising the following steps: *extrusion of a mixture containing said at least one resin and said at least one pigment without induced heating; *subsequent extrusion, with induced heating, of the mixture obtained from the preceding extrusion; *granulation of the mixture thus obtained. With the abovementioned process it is possible to obtain a composition having granules with an average diameter less than 2 microns and a greater homogeneity than the known processes.
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