Screen printing stencils using novel compounds and compositions

US4254194A · kind A · utility

Assignee

• Arthur D. Little, Inc. · US

Inventors

• Richard E. Merrill · Laconia, US
• Arthur A. Massucco · Natick, US

Key dates

• Filing date: Dec 3, 1979
• Grant date: Mar 3, 1981
• Expiry date: Dec 3, 1999

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/12
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Screen printing stencils are prepared by affixing to a printing screen substrate an indicia-defining, ultraviolet-sensitive film and cross-linking the film by exposure to ultraviolet radiation. The coating compositions used to form the film comprise copolyacrylate/polyurethane block copolymers, in which the copolyacrylate blocks are copolymers of at least one hydroxy-containing acrylate and at least one acrylate or methacrylate which may be partially substituted with bromine, ultraviolet initiators and cross-linking monomers. Screen printing stencils are provided which are compatible with both water-based and oil-based inks. The disclosed screen printing stencils are used in improved screen-printing methods.