Claims
- 1. A photographic element comprising:
- a support;
- at least one silver halide emulsion layer superposed on said support;
- at least one electrically conductive layer superposed on said support, said electrically conductive layer comprising an electrically conductive agent and a binder; and
- as an outermost layer a protective overcoat superposed on a side opposite the at least one silver halide emulsion layer, said protective overcoat comprising a polyurethane having a tensile elongation to break of at least 50% and a Young's modulus measured at 2% elongation of at least 50,000 lb/in.sup.2 and an interpolymer comprising repeating units of A and B wherein A comprises a fluorine containing acrylate or a fluorine containing methacrylate monomer and B comprises an ethylenically unsaturated monomer containing hydratable groups and the concentration of interpolymer is between 15 and 40 weight percent of the polyurethane and the interpolymer.
- 2. The photographic element of claim 1 wherein the support comprises cellulose nitrate film, cellulose acetate film, poly(vinyl acetal) film, polystyrene film, poly(ethylene terephthalate) film, poly(ethylene naphthalate) film, polycarbonate film, glass, metal or paper.
- 3. The photographic element of claim 1 wherein the repeating unit A is derived from a fluoro(meth)acrylate represented by the following formula:
- (R.sub.f).sub.p LOCOCR.dbd.CH.sub.2
- where the R.sub.f substituent is a monovalent, fluorinated, aliphatic organic radical having at least one carbon atom and as many as 20 carbon atoms, p is 1 or 2 and L is a bond or hydrocarbyl radical linkage group containing from 1 to 12 carbon atoms and R is either H or methyl.
- 4. The photographic element of claim 3 wherein the fluoro(meth)acrylate monomer contains at least 30 weight percent fluorine.
- 5. The photographic element of claim 1 wherein the repeating unit B is derived from monomers represented by the following formula:
- CH.sub.2 .dbd.CRL(COOH).sub.x
- where R is H, methyl, ethyl, carboxy, carboxymethyl, or cyano, L is a bond or hydrocarbyl radical linkage group containing from 1 to 12 carbon atoms, X is equal to 1 or 2.
- 6. The photographic element of claim 1 wherein the interpolymer comprises from 10 to 90 weight % of units A and from 10 to 90 weight % of units B.
- 7. The photographic element of claim 1 wherein the interpolymer comprise a molecular weight of from about 5000 to about 10,000,000.
- 8. The photographic element of claim 1 wherein the electrically conductive agent comprises electrically conductive metal-containing particles, fibrous electrically conductive powders, electrically conductive polyacetylenes, electrically conductive polythiophenes or electrically conductive polypyrroles.
- 9. The photographic element of claim 1 wherein the binder of the electrically conductive comprises gelatin, cellulosics, polyurethanes, polyesters, interpolymers of ethylenically unsaturated monomers, styrene, vinyl chloride or butadiene.
- 10. The photographic element of claim 1 wherein the electrically conductive layer further comprises coating aids, biocides, dispersants, hardeners, crosslinking agents or matte beads.
- 11. The photographic element of claim 1 wherein the electrically conductive layer is superposed on the side of the at least one silver halide emulsion layer.
- 12. The photographic element of claim 1 wherein the electrically conductive layer is superposed on the side opposite the at least one silver halide emulsion layer.
- 13. The photographic element of claim 1 wherein the protective overcoat further comprises crosslinking agents, lubricating agents or matting agents.
- 14. The photographic element of claim 1 wherein the interpolymer comprises from about 15 to about 40 weight percent based on a total weight of the polyurethane and the interpolymer.
CROSS REFERENCE TO RELATED APPLICATIONS
This application relates to commonly assigned copending application Ser. No. 09/274,644, filed simultaneously herewith and hereby incorporated by reference for all that it discloses.
US Referenced Citations (9)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0 845 090 |
Nov 1987 |
EPX |
0 118 080 |
May 1997 |
EPX |
0 884 636 |
Dec 1998 |
EPX |