Minnesota Mining and Manufacturing Company

Ferrania, S.p.a.

Tulalip Consultoria Comercial Sociedade Unidessoal S.a.

Paola Puppo

Alberto Valsecchi

Eric Daniel Morrison

Elio Martino

William L Kausch

Renzo Torterolo

Carlo Barlocco

Luisa Tavella

Photographic element with a layer improving the adhesion to the support base

One object of the present invention is to provide a mixture composed of 1) a cellulose ether derivative esterified at least with a biprotic acid group derivative expressed by the formula HOOC&mdash;B&mdash;COOH (I), wherein B is a linear aliphatic group represented by (CH,),with x a positive integer from 1 to 5 or is a 5-member or 6-member cycloaliphatic group and 2) a cellulose or cellulose derivative esterified at least with a phthalic acid derivative represented by the following formula (II).

Alkaline soluble mixture composed of cellulose derivatives

A base film including a substrate, an adhesion layer, a conductive layer, and a magnetic layer is provided. The adhesion layer preferably includes a sulfonated polyester/vinyl addition polymer, wherein the adhesion layer is disposed between the substrate and the conductive layer and improves adhesion between these layers, even under wet conditions. An adhesion layer is particularly useful in photographic elements and is at least located on a surface of the substrate that is opposite a silver halide emulsion layer, although emulsion receptivity can be enhanced by including an adhesion layer on the emulsion-side of the substrate.

Base film with a conductive layer and a magnetic layer

A photographic element comprising a polymeric film base, a silver halide emulsion layer, and an antistatic layer comprising a colloidal vanadium oxide and a vinyl addition polymer dispersion in a dry weight ratio of from 1:30 to 1:500. The antistatic layer may be present as a backing layer on the side of the base opposite the silver halide emulsion layer, as a subbing layer between the base and the emulsion layer in a single or double side coated photographic element, and/or as a subbing layer between the base and a different backing layer. No barrier layer is used over the antistatic layer.

Photographic element comprising antistatic layer

Light-sensitive photographic element comprising a polymeric film base, a silver halide emulsion layer, and an antistatic layer comprising a low viscosity and highly sulfonated water soluble polyacetal (preferably obtained by reaction of a low viscosity polyvinyl alcohol and a sulfonated aldehyde), a hydrophobic binder selected from the group consisting of a water dispersible sulfopolyester and a latex polymer having hydrophilic functionality, and a polyfunctional aldehyde crosslinking agent. The antistatic layer may be present as a backing layer on the side of the base opposite the silver halide emulsion layer, as a subbing layer between the base and the emulsion layer in a single or double side coated photographic element, and/or as a subbing layer between the base and a different backing layer.

Photographic elements comprising antistatic layers

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Cogoleto, Italy

Paola Puppo