Plastic laminate and bonding material therefor

Abstract

Abstract LAMINATE COMPRISING A PLURALITY OF LAYERS OF TRANSPARENT PLASTIC FILM SELECTED FROM THE GROUP CONSISTING OF POLYCARBONATE AND POLYSTYRENE, ADHESIVELY BONDED TOGETHER BY A CURED TRANSPARENT URETHANE POLYMER CONTAINING UNCURED EPOXY RESIN, AND PREFERABLY ALSO INCLUDING A CHLORINATED BIPHENYL, PARTICULARLY SUITED FOR PRODUCITION OF A TRANSPARENT LIGHT FILTER BODY, EACH OF THE LAYERS OF SUCH LIGHT FILTER BODY HAVING A GRID PATTERN THEREON AND FORMING A MULTIPLICITY OF VIEWING CELLS, SAID LIGHT FILTER BODY BEING ADAPTED TO FIT OVER A CATHODE RAY TUBE; AND AN ADHESIVE FORMULATION EMPLOYED FOR BONDING SUCH LAMINATE AT ROOM TEMPERATURE, CONTAINING URETHANE POLYMER, EPOXY RESIN, A POLYAMINE OR POLYOL CURING AGENT, AND PREFERABLY ALSO INCLUDING A CHLORINATED BYPHENYL, THE AMOUNT OF CURING AGENT EMPLOYED BEING SUFFICIENT TO REACT ONLY WITH THE ISOCYANATE GROUP IN THE URETHANE POLYMER AT ROOM TEMPERATURE, THE EPOXY RESIN FUNCTIONING IN THE URETHANE POLYMER ADHESIVE FORMULATION AS A PLASTICIZER, TH EPOXY RESIN ALSO IMPROVING THE ADHENSION OF THE FORMULATION TO THE PLASTIC SHEETS, AND INCREASING THE INDEX OF REFRACTION OF THE CEMENT BOND TO MORE CLOSELY APPROACH THE INDEX OF REFRACTION OF THE POLYSTYRENE AND POLYCARBONATE TRANSPARENT FILMS.

Inventors

• 👤 Vern E Hamilton
• 👤 Luther M Roseland

Bibliographic Details