Abstract: Erasable coatings for xerography paper comprise a pigment such as calcium carbonate in a binder such as an aqueous emulsion of an acrylic polymer. The erasability of the coating is improved by replacing at least 15 wt % of the binder with a polyalkane or (preferably) polyalkene wax, such as an aqueous emulsion of a polyolefin.

Abstract: Photographic base paper comprising a surface ply 1 of photographic grade paper and at least one backing ply 3 of a stronger paper such as a kraft paper provides smoothness and rigidity at least as good as conventional wholly photographic grade paper at reduced raw materials cost. Preferred weight of the surface ply is a range of from 20 to 50 gm.sup.-2.The paper can be made on a two-wire Fourdrinier machine (FIG. 5) or on a single wire machine with a secondary headbox (FIGS. 6 and 7).

Abstract: A composition for use in a thermal-sensitive paper coating and a heat-sensitive recording material utilizing the coating, which composition comprises a phenolic developer, e.g., a traditional low speed phenolic having a melting point greater than 120.degree. C., and a pseudo developer. The pseudo developer is combined with the phenolic developer in an amount effective to provide for the formation of homogenous phase when the composition is melted, which phase further solidifies back to a single crystalline phase when cooled.

Abstract: There is provided a transparency sheet suitable for plotter recording having a coating comprised of a polyurethane and a highly hydrophilic polymer. The hydrophilic polymer is preferably polyvinylpryolidone which is admixed with a "water borne" polyurethane.

Abstract: An ink jet transparency is provided which exhibits a unique ability to maintain the edge acuity of ink patterns or blocks on the transparency. The ink jet transparency comprises a substantially transparent resinous support, e.g., a polyester film, and a substantially clear coating thereon which includes a specific fluorosurfactant. The presence of the fluorosurfactant of the present invention in the clear coating prevents trailing of the ink-jet ink. As a result, patterns and ink blocks do not trail into one another on the transparency, but maintain their defined shape and size.

Abstract: An ink jet transparency is provided which exhibits improved wetting properties, thereby resulting in an even surface distribution of ink on the transparency. The ink jet transparency comprises a substantially transparent resinous support, e.g., a polyester film, and a substantially clear coating thereon which includes a non-volatile organic acid. Glycolic acid, citric acid, malonic acid, tartaric acid, maleic acid, fumaric acid, malic acid and succinic acid are among the preferred non-volatile organic acids employable in the present invention. The presence of the organic acid results in greatly improved wetting of ink jet ink in solid block areas, preventing the ink from coalescing onto itself. Undesired voids and pin holes in those areas where the ink has been applied are therefore avoided.

Abstract: Provided herewith is an anti-brick/anti-static composition useful for treating film surfaces. The composition comprises (i) an anionic or cationic surfactant exhibiting anti-static properties, and (ii) a similar charged inorganic particle, e.g., a negatively charged silica or positively charged alumina coated silica, having an average particle size of less than 0.1 micron. Upon coating a film surface with the composition, good anti-static properties are realized without experiencing problems with bricking or blocking of the film. The composition is particularly useful in coating microfilm since it also provides the anti-brick/anti-static properties without deleteriously effecting the viewing capabilities of the film over a wide range of magnifications.

Abstract: Disclosed are compounds of the formula ##STR1## wherein n is 1 or 2; R.sup.1 and R.sup.2 are alkyl or aralkyl; R.sup.3 is alkyl; when n is 1, R.sup.4 is alkyl, aralkyl, alkenyl, aralkenyl, aryl or a polyether radical having up to 10 ether groups; and when n is 2, R.sup.4 is alkylene, aralkylene, alkenylene, aralkenylene, arylene or a divalent polyether radical having up to 10 ether groups. The compounds are highly efficacious organic photoconductors for use in electrophotography, exhibiting improved pre-exposure fatigue resistance and blooming properties as compared with known photoconductors. Photoconductive elements containing these compounds are also described.

Abstract: An improved vesicular matrix prepared by the emulsion polymerization of methacrylonitrile, either alone or with a small amount of comonomer, in the presence of a cationic emulsifier. The resulting polymer or copolymer can be used alone, or the polymer or copolymer may be blended with a small amount of a highly incompatible polymer or copolymer, to provide an improved vesicular matrix.

Abstract: Provided is a dielectric imaging sheet useful in electrographic imaging, wherein a particulate solid incorporated into the dielectric coating has been treated with an acyloxy or amino terminated polysiloxane. Short-chain polysiloxanes, e.g., 3 to 8 siloxane units, are preferred as the treating agent, with the amino group being preferably lower alkyl substituted and the acyloxy group being preferably lower acyloxy. Use of the specially treated particulate solid reduces moisture induced imaging defects upon using the dielectric sheet in electrographic imaging.

Abstract: An improved vesicular matrix prepared by employing regulated inner incompatibility to produce enhanced nucleation. The inner incompatibility is produced by copolymerizing a first monomer with a small amount of a second monomer wherein a homopolymer of the second monomer would be incompatible with a polymer of the first monomer, or by blending a first polymer or copolymer with a small amount of a highly incompatible second polymer or copolymer.

Abstract: Substituted 2,2'-dihydroxydiphenyl sulfide, sulfoxide, and sulfone compounds, and their use as azo coupling components in light-sensitive diazo compositions. The novel compounds couple with rapidly developing diazonium compounds to provide lemon-yellow dyes, and can be used in combination with blue and violet couplers to provide a green-black diazo image in higher density areas with a neutral black in lower density areas.

Abstract: Novel diazonium salts which possess excellent photo speed, good thermal stability, exceptional resistance to discoloration in the D.sub.min areas, rapid development, and allow a wide range of azo dye colors are provided. The diazonium salts are of the following formula: ##STR1## wherein R.sub.1 is tertiary butyl or tertiary amyl; Y is hydrogen, alkyl, hydroxyalkyl, cyanoalkyl, cycloalkyl, aralkyl, alkoxy, aryloxy, aralkoxy, aralkylthio, arylthio, alkylthio, halogen, allyl, allyloxy, allylthio, cyanoalkoxy, hydroxyalkoxy, methoxyalkoxy, trifluoroalkyl, alkylacetylamino, morpholino, or dialkyl carbonamido;R.sub.2 and R.sub.3 are the same or different, and are alkyl, aralkyl, allyl, cyanoalkyl, hydroxyalkyl, hydrogen, acyl, cycloalkyl, beta-chloroalkyl, branched alkyl, or a structure wherein R.sub.2 and R.sub.3 may be linked together to form a heterocyclic structure; andX is an anion.

Abstract: New compounds of the formula ##STR1## wherein n is 1 or 2; R.sup.1 and R.sup.2 are alkyl or aralkyl; R.sup.3 is alkyl; when n is 1, R.sup.4 is alkyl, aralkyl, alkenyl, aralkenyl, aryl or a polyether radical having up to 10 ether groups; and when n is 2, R.sup.4 is alkylene, aralkylene, alkenylene, aralkenylene, arylene or a divalent polyether radical having up to 10 ether groups. The compounds are highly efficacious organic photoconductors for use in electrophotography, exhibiting improved pre-exposure fatigue resistance and blooming properties as compared with known photoconductors. Photoconductive elements containing these compounds are also described.

Abstract: Provided are light-sensitive diazonium compounds known as diazonium trifluoromethane sulfonates, which have the structural formula: ##STR1## wherein D --N.dbd.N-- is the cation of a light-sensitive, aromatic diazonium compound. The diazonium trifluoromethane sulfonates are prepared as the reaction product of trifluoromethyl sulfonic acid, or a salt thereof, and a diazonium compound. Said diazonium trifluoromethane sulfonates find utility in diazography formulation for both positive- and negative-working diazotype photoreproduction systems, and as latent polymerization initiators activatable by irradiation.

Abstract: Novel, coatable, highly long-chain branched, ungelled, most preferably endblocked, non-linear phenoxy resins of random structure devoid of regularly recurring units, with the average distance between the branch sites thereof being essentially of the same order of magnitude as the average branch length, such resins advantageously comprising the copolymerization product of:(i) at least one dihydric phenol, e.g., sulfonyl diphenol;(ii) an epoxy comonomer having two epoxy functional groups, e.g., resorcinol diglycidyl ether;(iii) a branching agent comprising an epoxy or phenolic compound having a functionality greater than 2, and preferably at least 3, wherein the amount of branching agent is sufficient to provide at least 10 mole percent branch sites in the polymer resin, and, most preferably;(iv) a monofunctional phenol or epoxide as an endblocker compound.The branched phenoxy resins are well adapted as matrices for enhanced film speed vesicular films.

Abstract: Disclosed are electrophotographic elements comprising a support having coated thereon a photoconductive composition comprising a photoconductor dispersed in a linear film-forming polyester resin having its terminal hydroxyl and carboxyl groups endblocked with aprotic groups. The aprotic groups reduce hydrogen bonding within the resin matrix, and enhance the flowability of the resin when heated. Electrophotographic elements utilizing polyester resin binders endblocked in accordance with the present invention possess improved fusibility as compared with similar electrophotographic elements containing equivalent but protic endblocked polyester matrices, and as a result can be readily developed by flash fusing. In addition, such electrophotographic elements containing polyester resin binders endblocked in accordance with the instant invention possess improved photographic speed, and often improved dark decay properties, as compared with electrophotographic elements containing protic endblocked polyester matrices.

Abstract: Negative-working diazography material is comprised of (i) at least one hexafluorophosphate diazonium salt adapted to photolytically cleave into an acid catalyst, (ii) at least one acid labile enolic, preferably arylenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, and (iii) an effective amount of at least one additive such as benzotriazole, urea, thiourea and derivatives thereof. The additives are believed to react with the acid released during imaging to the extent that migration thereof into the areas which have not been exposed to light is reduced or eliminated. The reduction in the migration of the liberated acid improves the D-min and line acuity of the image obtained from the formulation and the presence of the additive provides a means for decreasing the photo speed of the formulation.

Abstract: Negative-working diazography formulation is comprised of (i) at least one hexafluorophosphate diazonium salt adapted to photolytically cleave into an acid catalyst, (ii) at least one acid labile enolic, preferably arylenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, and (iii) an effective amount of an additive, such as p-toluenesulfonyl benzamide, capable of controlling the pH of films prepared from said formulation when subjected to a clearing step as defined herein.

Abstract: Negative-working diazography material is comprised of (i) at least one diazonium compound, (ii) at least one acid labile enolic, preferably phenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, (iii) at least one light-sensitive acid progenitor, and (iv) at least one carboxylic acid anhydride. The diazonium compound can itself concurrently function as the acid progenitor, e.g., when complexed with a Lewis acid. Upon imagewise exposure to light, acid catalyst is photochemically liberated, thus unblocking coupler molecules such that dye image forms under alkaline developing conditions only where the material has been irradiated. Under alkaline developing conditions, the anhydride reacts to render the unused diazo component remaining in the unexposed areas inactive.