| 摘要 |
1355627 Molybdenum bearing pigments AMERICAN METAL CLIMAX Inc 11 Feb 1972 [22 Feb 1971] 6528/72 Headings C1A and C1N [Also in Division C3] A pigment possessing corrosion inhibiting properties which comprises discrete particles of a substantially inert carrier, the particles having a metal molybdate compound which is one or more of zinc molybdate, calcium molybdate, strontium molybdate, and barium molybdate deposited on at least a portion of the surfaces thereof and being compatible with the metal molybdate compound is prepared by contacting the particulate carrier in either order with an aqueous solution containing a dissolved metal ion which is one or more of zinc, calcium, strontium, or barium and an aqueous solution containing a dissolved alkali metal molybdate to deposit a metal molybdate on the particulate carrier which may be titanium dioxide, zinc oxide, barium sulphate, calcium sulphate, e.g. gypsum, terra alba, plaster of Paris; calcium carbonate e.g. whiting and chalk; magnesium carbonate; silicas, e.g. quartz and diatomaceous earth; magnesium silicates and related minerals such as talc and soapstone; koalin clay, mica and pumice and may be of particle size 0À1 to 25 microns. The so produced pigment may be incorporated in liquid protective coating compositions. |
