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US 4,885,191 AGranted
Pigment coated with polycyanoacrylate and a process for coating pigments
AssigneeBayer Aktiengesellschaft
InventorsWolfgang Podszun, Helmut Waniczek
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Abstract
The invention relates to a pigment coated with polycyanoacrylate and to a process for coating pigments.
Claims8
A process for coating a basic or neutral pigment comprising
- first forming a dispersion comprising the pigment in an aprotic medium containing a cyanoacrylate monomer and a dispersion auxiliary, where the pigment has a particle size of 20 to 80 nm and where the dispersion auxiliary is a soluble polymer formed from at least one (meth) acrylic acid ester,
- then coating the thus-formed dispersed pigment by polymerizing cyanoacrylate.
Dependencies are inferred from the claim text.