Abstract: A photoimageable composition and process for use of the same. The composition comprises a binder that is a mixture of a phenolic resin and a multifunctional epoxy or vinyl compound and a curing system comprising a photoactive compound capable of generating a curing catalyst capable of crosslinking the binder components. The process for use of the composition comprises application of the composition to a substrate, drying of the same, exposing the dried coating to activating radiation, curing the binder in light exposed areas, developing the coating and thermally curing the developed image. The composition is especially useful as a solder mask.

Abstract: A photoimageable composition and process for use of the same. The composition comprises a binder that is a mixture of a phenolic resin and a multifunctional epoxy or vinyl ether pound and a curing system comprising a photoactive compound capable of generating a curing catalyst capable of crosslinking the binder components. The process for use of the composition comprises application of the composition to a substrate, drying of the same, exposing the dried coating to activating radiation, curing the binder in light exposed areas, developing the coating and thermally curing the developed image. The composition is especially useful as a solder mask.

Abstract: A light sensitive composition and process for using said composition. The light sensitive composition comprises a phenolic resin, a multifunctional epoxy or vinyl compound, a photoinitiator and a thermal crosslinking agent. The process for using the same comprises application of the light sensitive composition to a substrate, drying of the same, exposing the dried coating to activating radiation, partially heat curing the coating, developing the coating and thermally curing the developed image. The composition is especially useful as a solder mask.

Abstract: Distortion and chemically resistant heat transfer materials formed by a mixture of at least two interspersed polymers. One of the polymers is a film-forming, multi-aromatic ring condensation product, preferably a saturated aromatic, acid-based polyester. This polymer is reinforced by a second polymer which preferably contains bulky ring structures, such as polymerized rosin esters, but may be essentially linear, for example an ethylene-vinyl acetate copolymer. The materials may be used as a protective and brightener coating for labels, which are heat activated to transfer them from a carrier to a final substrate such as the face of a package. The labels thus coated exhibit improved resistance to adverse chemicals such as alcohols, oils and detergents. The materials may also be used to provide distortion and chemically resistant inks, and distortion and chemically resistant adhesives.

Abstract: Jet printing is described employing an ink of low viscosity and resistivity having improved resistance to abrasion and solvents after drying. The ink comprises an acrylic polymer, dyestuff, volatile basic compounds, and a complexed multivalent metal ion cross-linking agent dissolved in a solvent vehicle which is predominantly water, a lower alcohol, or mixtures thereof.