Abstract: A photosensitive composition useful as a photoresist which may be completely processed by dry techniques, especially by means of an oxygen plasma.The composition includes an N-vinylmonomer and an organic hydrogen compound in a binder which contributes significantly to the utility of the composition in the fabrication of micro-electronic devices.

Abstract: A novel photosensitive elastomeric composition comprising a thermoplastic elastomer, an ethylenically unsaturated compound, a photopolymerization initiator and an N-substituted maleimide compound. The composition of the present invention is excellent in photosensitivity. The composition of the present invention is useful especially for the manufacture of flexographic printing elements.

Abstract: The present invention relates to a photoimaging process whereby a polymeric film containing sulfide functionality is selectively exposed to incident radiation in the presence of oxygen and a photosensitizer so that the sulfur functionality is photooxidized to produce a latent image which may then be developed. Polymeric films containing photooxidizable organic sulfide functionality and preferably additional carbon-carbon double bond unsaturation, which are capable of being used in the foregoing process are also included within the scope of the present invention.

Abstract: The present invention relates to amino-functional photopolymer compositions and to photo-oxidation imaging processes utilizing such compositions. The amino-functional photopolymer compositions comprise amino-functional polymers. For example, other polymers or resins without amino-functionality may be incorporated to aid in adapting the compositions for use in particular applications as are discussed herein.

Abstract: The subject invention relates to photopolymerizable compositions useful for making plastic printing elements for use in photolithography and other photomechanical processes. The photopolymerizable compositions comprise an aqueous mixture of a water-insoluble resin, a water-soluble binder, a crosslinking agent, and a photopolymerization initiator having an alpha-keto ester linkage. In particular, photopolymerization initiators include oxalic acid, sodium oxalate, potassium oxalate, lithium oxalate and urea oxalate. The printing plates prepared from the compositions herein disclosed have improved ink receptivity, good retention of such ink, receptivity even after long continued use, greater durability and excellent binding qualities.

Abstract: The preparation of rapidly curable ultraviolet coating compositions utilizing, in addition to standard photoinitiators, an aromatic sulfide is disclosed. Utilized in conjunction with the aromatic sulfide may be a triplet state sensitizer, such as a fused ring aromatic compound.

Abstract: A novel photosensitive elastomeric composition comprising a thermoplastic elastomeric block copolymer, an ethylenically unsaturated compound derived from fumaric acid or maleic acid and a photopolymerization initiator. The composition of the present invention is excellent in various properties, especially in heat stability. The composition of the present invention is useful, especially for the manufacture of flexographic printing elements.

Abstract: In a photoresist material comprising a support having formed thereon a layer of a photopolymerizable composition comprising a film forming polymer, a monomer having at least one addition polymerizable unsaturated bond, and a photopolymerization initiator, the adhesive property and the light-sensitivity of the layer of the photopolymerizable composition are improved by incorporating a rosin tackifier in the layer.

Abstract: The present invention relates to amino-functional photopolymer compositions and to photo-oxidation imaging processes utilizing such compositions. The amino-functional photopolymer compositions comprise amino-functional polymers and photosensitizing agents which, when exposed to electromagnetic radiation in the presence of ordinary molecular oxygen, are cured, thereby forming a less soluble polymer. Where the irradiation has been done selectively or in an imagewise fashion, the compositions allow for the development of an image by virtue of the solubility or redispersibility differential between the exposed and unexposed portions of the compositions. The amino-functional photopolymer may be any of a large variety of types, but generally will comprise a polymer with two or more amino-functional groups. The polymer may be a soluble polymer or a small-particle-size microgel cross-linked polymer. The photopolymer may also comprise mixtures of soluble polymer and small-particle-size microgel cross-linked polymer.