| 摘要 |
1,048,393. Antistatic layers for photographic materials. EASTMAN KODAK CO. June 12, 1963 [June 12,1962], No.23402/63. Heading G2C. A photographic material comprises a support and a light-sensitive silver halide emulsion layer or a layer containing a silver image, and an antistatic layer containing at least 15% by weight of a water-soluble salt of a lactone of an interpolymer of an unsturated a:#-dicarboxylic acid and vinyl alcohol, a proportion of the carboxylic acid groups in the interpolymer not bonded in the lactone rings being in alcohol ester form and there being a proportion of carboxyl groups in salt form sufficient to confer water-solubility on the lactone. Water-soluble salts specified are, for example, those claimed in claim 3 of Specification 1, 013,179 and salts made from the partial hydrolysis products of the polymer described in Specification 537, 709. The antistatic layer may comprise the water-soluble salt alone or mixed with a hydrophilic colloid such as gelatin, and may be situated on the back of the support, e.g. over the antihalation layer, under or over the emulsion layer or between emulsion layers and may be applied to a subbed or unsubbed support from acetone, methanol or aqueous solution. The layer may be coated onto a material having a developed silver image e.g. by dipping, or the watersoluble salt may be incorporated into the silver halide emulsion layer so that this is also the antistatic layer. The antistatic layer may also contain titanium dioxide, anti-curl substances or antihalation dyes. The antistatic layer may be water-soluble so that it is removed during processing or it may be rendered insoluble by incorporating a hardener such as triethylenemelamine, tris (1-(2<SP>1</SP>- methylaziridinyl))-phosphine oxide, hexa (1-(2<SP>1</SP>- methylaziridinyl))-triphosphatriazine, ethylene bis (N, N-(1:2-propylene)-urethane), hexamethylene 1, 6-bis (3, 3-ethylene urea), mesitylene-2, 4, 6-tris (3, 3-ethylene urea), butane-1, 4-diol bis(glycidyl ether), vinylcyclohexene dioxide, resorcinol diglycidyl ether, bis(2, 3-epoxypropyl) propylamine and bis(2, 3-epoxypropyl) ethylmethyl-ammonium-ptoluene sulphonate. |
