Polycarbonate film containing an antireflection coating

• US 3,356,522 A
• Filed: 02/10/1964
• Issued: 12/05/1967
• Est. Priority Date: 02/10/1964
• Status: Expired due to Term

• Current Assignee: Barbara A. Libbert
• Original Assignee: Barbara A. Libbert
• Inventors: Libbert, Barbara A.
• Application Number:
  US04/343,637
• Time in Patent Office: 1,394 Days
• US Class Current: 428/412
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C08J 7/06 with compositions not containing macromolecular substances
• CPC Class Codes: G02B 1/115 Multilayers
• CPC Class Codes: G03C 1/825 characterised by antireflection means or visible-light filtering means, e.g. antihalation
• CPC Class Codes: H01J 2229/8918 by using interference effects
• CPC Class Codes: H01J 29/896 Anti-reflection means, e.g. eliminating glare due to ambient light
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31667 Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product

Claims

1. A TRANSPARENT POLYCARBONATE FILM CONTAINING ON A SURFACE THEREOF A MULTILAYER TRANSPARENT ANTIREFLECTION COATING COMPRISING THREE SUCCESSIVE LAYERS OF SILCON MONOXIDE, EACH OF SAID LAYERS HAVING A DIFFERENT INDEX OF REFRACTION FROM AN ADJACENT SILCON MONOXIDE LAYER, AND A FOURTH LAYER OF MAGNESIUM FLUORIDE OVER THE THIRD LAYER OF SILICON MONOXIDE.