Coating of organic and inorganic pigments with aldehyde or...

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter

Reexamination Certificate

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C428S404000, C428S405000, C428S406000, C428S407000, C427S212000

Reexamination Certificate

active

08007906

ABSTRACT:
Coating of organic and inorganic pigments with aldehyde or ketone resins, comprising a chemical compound consisting of particles of solid organic and inorganic substances, both defined as pigments, in that they are substances which absorb a fraction of the light and reflect the complementary part thereof, coated with aldehyde or ketone resins. The latter are deposited on the surface of the pigment by means of a process which envisages melting of the resin, consequent wetting and coating of the entire surface of the pigment with the resin in the melted state, the consequent cooling and subsequent step of atomization by means of mechanical systems operating in temperature conditions lower than 10° C., by means of cryogenic processes. The product resulting from this invention will be used as a semifinished product for the coloring and pigmentation of powder paints and plastics as a monochromatic coloring material and or will also be used, after dissolving in a solvent, as a pigmented paste in the liquid paints industry.

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