Interfacial vesicular print materials and methods of preparation

Claim 2

The process of claim 1 wherein the encapsulating resin component 6 parts by weight of a copolymer of vinylidene chloride and acrylonitrile and the encapsulated resin component is 1 part by weight of polystyrene.

Claim 3

The process of claim 1 wherein the incompatible polymer solutions are 3 parts of vinylidene chloride-acrylonitrile copolymer dissolved in butanone and 1 part of polystyrene dissolved in butanone and the photosensitive diazonium salt is dissolved in butyrolactone.

Claim 4

The process of claim 1 wherein the encapsulating resin component is essentially a polyvinylformal and the encapsulated resin component is essentially a polyketone resin.

Claim 5

The process of claim 1 wherein the encapsulating resin component is a methacrylonitrile copolymer and the encapsulated resin component is a vinylidene chloride-acrylonitrile copolymer.

Claim 6

A photographic material made by the process of claim 1 and capable of furnishing a record solely in the form of a pattern of vesicles, said material being in the form of a thermoplastic hydrophobic film which softens between 70* C. and 150* C. and comprising an intimate encapsulate of one hydrophobic resin having a threshold incompatibility relationship in a continuum of an encapsulating dissimilar hydrophobic resin and a diazonium compound capable of generating nitrogen upon exposure to radiation substantially uniformly dispersed through both resins, said agent upon exposure to light decomposing into products which solely upon warming are volatile to form vesicles only in the light struck areas to furnish thereby said record, said encapsulating resin having a permeability for nitrogen less than 10 11 (cm3STP) (cm)/(cm2) (sec) (cm Hg) (cm Hg) 1 at 25* C. and being chosen from the group consisting of vinylidene chloride/acrylonitrile copolymers, polyvinylformal, methacrylonitrile homopolymer, methacrylonitrile/methylmethacrylate copolymers, chloroacrylonitrile alpha homopolymers, vinyl chloride homopolymer and copolymers of chloroacrylonitrile and of vinyl chloride with a different vinyl monomer which is present to the extent of less than 50 mole percent of the copolymer and said encapsulated resin is present to the extent of mOre than 5 percent but less than 50 percent of the total resins.

Claim 7

A material according to claim 7 wherein the encapsulating resin component is essentially a copolymer of vinylidene chloride and acrylonitrile and the encapsulated resin component is essentially polystyrene.