| 摘要 |
<p>1348961 Record sheets NATIONAL CASH REGISTER CO 22 May 1972 [14 June 1971] 23875/72 Heading D2B Record sheets for use in pressure-sensitive copying processes comprise a supporting sheet carrying an oil-soluble phenol-formaldehyde resin and/or a base-reacting, colourless, chromogenic dye-precursor and a -metal salt or complex soluble in a solvent for the resin and dye-precursor. The common solvent for the reactants may be contained in microcapsules. In self-contained papers, the encapsulated solvent is isolated from the reactants, but in a couplet system it may be carried on one of the sheets separately or together with one of the reactants. The solvent may be a paraffin oil, xylene, alkylated biphenyl, dioctyl adipate or phthalate, trichlorobiphenyl, or diphenyl oxide. The metal salt may or salt the cation of which is Al (III), Ba (II), Cd (II), Ca (II), Ce (III), Cs (I), Co (II), Cu (III), In (III), Fe (II), Fe (III), Pb (II), Mg (II), Mn (II), Mo (V), Nr (II), Na (I), Sr (II), Sb (II), Ti (IV), V (IV), Zn (II), Zr (IV), and the anion of which is acetylacetonate, hexafluoroacetylacetonate, benzoate, naphthenate, salicylate, 2- ethyl hexanoate, abietate, oleate, palmitate, caprylate and laurate. The dye-precursor may be Crystal Violet Lactone or a fluoran derivative. In a typical example, an aqueous coating composition containing para-phenol-formaldehyde resin, zinc acetomylacetonate, kaolin, silica gel, calcium carbonate, styrene-butadiene latex, and cooked starch was applied to paper, and the coated paper was dried to form a transferreceiving sheet.</p> |
