| 摘要 |
1,151,622. Coated exhibiting anisopanoramic light scattering. E. I. DU PONT DE NEMOURS & CO. 14 Feb., 1967 [15 Feb., 1966], No. 7044/67. Headings B2E and B2K. [Also in Divisions C3, C4 and G2] Compositions which provide coatings that exhibit anisopanoramic scattering of laterally incident light contain (a) a composition comprising elongated, pigmentary alkali metal polytitanate particles dispersed in a solid, transparent material having a lower refractive index than the particles and being substantially free of any dispersed gas phase, the polytitanate having the formula M 2 Ti n O 2n+1 , where M is Na or K and n is an integer from 3-60, and the particles having an average length-towidth ratio of at least 10, together with (b) a solvent. The solvent may be water, optionally including ethylene glycol, mineral spirits or toluol. 'Said transparent material may comprise polyvinyl acetate, polyvinyl alcohol, an acrylic resin, an alkyd resin, a cellulose derivative, a drying oil, shellac or waterglass. The coating compositions may also include other pigments or extenders, and other ingredients such as dispersing agents, antifoaming agents, wetting agents, polyglycol, mildew preventive and sodium hexametaphosphate. To obtain the anisopanoramic coating, the composition can be applied to a surface by (i) spraying and then (ii) manipulating the wet film to cause alignment of polytitanate particles by, e.g., brushing, daubing, stippling, rolling or drawing. Alternatively, the manipulating method (ii) can also be used as the primary method of applying the coating. In Examples coatings are applied to cardboard panels (having a white basecoat), aluminium foil and glass. |
