Treatment of inorganic pigments
AssigneeSCM Corporation
InventorLeon Weber
Life of this patent
Estimating the term…
Abstract
Improved inorganic pigments, such as pigmentary titanium dioxide, are made by treating such pigments with a treating agent comprising the reaction product of a phosphorylating agent and a polyolefin.
Claims27
Process for treating an inorganic pigment which comprises applying to said pigment a treating agent comprising the reaction product of a phosphorylating agent and a polyolefin in a proportion to provide at least about 0.02% phosphorus content by weight of said pigment.
Inorganic pigment coated with a treating agent comprising the reaction product of a phosphorylating agent and a polyolefin, said coated pigment containing a sufficient proportion of said phosphorylated polyene to provide at least about 0.02% phosphorus content by weight.
Process for suppressing yellowing in thermoplastic polyolefins containing a phenolic anti-oxidant and titanium dioxide pigment which comprises adding to said polyolefin an effective amount of a treating agent comprising the reaction product of a phosphorylating agent and a polyolefin.
Dependencies are inferred from the claim text.