Imperial Chemical Industries Limited

Bedford Limited

Bexford Limited Imperial Chemical House

Bexford Limited

Stuart C Rennison

David E Lothian

Michael K Titman

Roy F Huffey

Alan James Butters

John A Pope

Roger N Barker

Ronald J Stacey

Timothy Douglas Andrews

Darrin J Page

Stuart G Lambert

David L Boutle

An imaged copy film comprising (a) a polymeric film substrate, (b) an image-receiving layer comprising a terpolymer of a vinyl halide, a vinyl ester of a saturated aliphatic carboxylic acid and a functional group-containing unsaturated termonomer, and (c) an electrostatic copying toner image layer. Toner adhesion is improved and the applied images exhibit superior resistance to abrasion and erasure.

Imaged copy film

A laser-imageable assembly comprising a transparent substrate and an associated energy absorbent transfer layer comprising particles which absorb laser energy dispersed in a resin, the assembly comprising at least one further layer selected from

Laser-imageable assembly and process for production thereof

A laser-imageable assembly comprising a transparent substrate having on a surface thereof an energy absorbent transfer layer comprising particles which absorb laser energy dispersed in a heterogeneous resin layer. Heterogeneity may be achieved by appropriately drying the coated substrate. The assembly may also comprise one or more additional layers of primer, protective and lubricant coatings. A preferred assembly comprises a polyester substrate with a graphite-containing heterogeneous transfer layer.

Laser-imageable assembly with heterogeneous resin layer and process for

Process for forming a vesicular image utilizing a vesicular recording material having an imaging layer which includes a defined sulphone and/or sulphonamide additive in an amount of 1 to 100% by weight based upon the weight of a polymeric component of the plastics vehicle. The additive provides improved image density and a back-appearing image.

Recording materials

A photopolymerizable element suitable for use in the production of photorelief printing plates comprises a film or sheet, an adhesive layer and a photopolymerizable layer wherein the adhesive layer comprises a non-photopolymerizable plastics binder and a photopolymerization initiator comprising an admixture of a compound of the formula: ##STR1## preferably 4,4'-bis(dimethylamino)-benzophenone in an amount 0.01 to 2.0% by weight based upon the weight of the binder and another photopolymerization initiator in an amount 0.1 to 7% by weight based upon the weight of the binder.

Photopolymerizable element having initiator in adhesive layer

Vesicular recording materials incorporate a sensitized layer comprising, as vehicle for the sensitizing agent, a quaternized polyelectrolyte, e.g. preferably polymers of dimethylamino ethyl methacrylate. The water sensitivity of the preferred polymers is reduced by copolymerisation with insolubilizing comonomers such as itaconic acid.

Recording materials for vesicular imaging

Light-sensitive vesicular imaging materials

Modifying the surface of a diazotype material by incorporating an acrylic or methacrylic polymer into the diazotype sensitizing coating composition or coating the assembly with it so as to roughen the surface of the material thereby enabling nitrogen, which is liberated when the material is exposed to light, to escape from between the master and the diazotype material to prevent nitrogen accumulating between the two and hence avoiding slippage of one relative to the other.

Growing community of inventors

Hadleigh, United Kingdom

Stuart C Rennison