Treating polysiloxane-coated pigment particles

A process of treating pigments which have been coated with silicon hydride-containing polysiloxanes wherein the process comprises dispersing the coated pigment in a non-polar organic solvent, and reacting the silicon hydride containing polysiloxane coated pigment with aqueous or non-aqueous solution...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MARTIN IAN JAMES, GORDON ROBERT DAVISON, MAXINE JANE GOLDSWORTHY
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DYES HUMAN NECESSITIES HYGIENE INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES PREPARATION OF CARBON BLACK PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	A process of treating pigments which have been coated with silicon hydride-containing polysiloxanes wherein the process comprises dispersing the coated pigment in a non-polar organic solvent, and reacting the silicon hydride containing polysiloxane coated pigment with aqueous or non-aqueous solution of organic or inorganic base so as as to provide a coated pigment having a residual hydride content as measured by hydrogen potential of less than about 0.5ml H 2 /g of coated pigment. The pigment may be an iron oxide or TiO 2 . The inorganic base may be an alkali metal hydroxide in the form of an alcoholic solution.