| 摘要 |
<p>A cerium ion-free pigment of rutile TiO2 particles bearing coatings comprising alumina precipitated in the presence of a water-soluble fluofide compound, such that from 0.05-2% by weight of the TiO2, of fluoride ions are adsorbed on the TiO2 particle surfaces and contained within the coatings. - (3pp) EPAB- EP-129959 B A cerium ion-free pigment of rutile TiO2 particles bearing coatings comprising alumina precipitated in the presence of a water-soluble fluoride compound, such that from 0.05-2% by weight of the TiO2, of fluoride ions are adsorbed on the TiO2 particle surfaces and contained within the coatings. - EP-221280 B A pigment of rutile TiO2 particles bearing coatings which comprise alumina, and from 0.05-5% by weight of a fluoride compound which is K7Ce6F31, Na7Ce6F31, Li7Ce6F31, or (NH4)7Ce6F31 adsorbed on the TiO2 particle surfaces and contained within the coatings. USAB- US4460655 A Particles of TiO2 in the rutile form and free of cerium are coated with alumina; fluoride ions as 0.05-2 wt.% of TiO2 are associated with the particles. A pigment compsn. contains 0.05-5 wt.% (TiO2 basis) M7C36F31, where M is Na, K, Li or NH4. The pigment is combined with paper in a rigid matrix to form a paper laminate, or is combined with a film-forming material and a liq. carrier in a coating compsn.</p> |
