| 摘要 |
964,624. Coated sheet materials. E. I. DU PONT DE NEMOURS & CO. Sept. 25, 1962 [Sept. 29, 1961], No..36387/62. Drawings to Specification. Heading B2E. [Also in Divisions C3 and C5] Flexible substrates may be coated with compositions comprising a ternary combination of (A) a resinous chlorinated paraffin as principal component, (B) a copolymer of 20-40 weight per cent of vinyl acetate and 60-80 weight per cent of ethylene, and (C) at least one refined petroleum wax, 100 parts by weight of said combination consisting of at least 47 parts of (A), at least 12 parts of (B) and at least 8 parts of (C). Specified substrates are paper, regenerated cellulose sheets, aluminium foil and films of polyethylene, polypropylene, polyethylene terephthalate and polyvinyl fluoride. The compositions may be applied by roller coating, spraying, brushing, extrusion or melt coating Minor proportions of liquid chlorinated paraffins may be blended with (A). The copolymer may comprise minor proportions of units of acrylic, methacrylic or itaconic acid, acrylamide, #-dimethylaminoethyl or glycidyl methacrylate, or #-hydroxyethyl or glycidyl acrylate. Preferred waxes are those melting in the range 130-165 ‹F. The compositions may also comprise stabilizers, e.g. epoxy resins and epoxidized oils, and solvents, e.g. toluene, xylene and petroleum naphthas. |
