PHOTOHARDENABLE ELECTROSTATIC ELEMENT WITH IMPROVED ENVIRONMENTAL LATITUDE

• Main Authors: FINCHER, CURTIS R., JR, BLANCHET-FINCHER, GRACIELA B, CHANG, CATHERINE T
• Format: Patent
• Language: English; French
• Published: 12.11.1990
• Edition: 5
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CINEMATOGRAPHY; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; LINING MACHINES; MAGNETOGRAPHY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTED CIRCUITS; PRINTING; PRINTING PLATES OR FOILS; STAMPS; TRANSPORTING; TYPEWRITERS

ABtract TITLE PHOTOHARDENABLE ELECTROSTATIC ELEMENT WITH IMPROVED ENVIRONMENTAL LATITUDE Photohardenable electrostatic master with improved environmental latitude comprising (1) an electrically conductive substrate, and (2) a layer of photohardenable composition consisting essentially of (a) at least two organic polymeric binders, at least one having a Tg greater than 80.degree.C and at least one having a Tg less than 70.degree.C, (b) at least one monomeric compound having at least one ethylenically unsaturated group, and (c) a photoinitiator or photoinitiator system, the shift in transit time (a?) of the photohardenable layer in the range of 30% ? relative humidity ? 60% and 15.6.degree.C ? temperature ? 26.7.degree.C is 15 or less, preferably 10 or less. A xeroprinting process is described using the master. The master is used in graphic arts, color proofing which duplicates images produced by printing, preparation of printed circuit boards, resists, soldermasks, etc.