| 摘要 |
PURPOSE: To enhance the antireflection performance, to increase the adhesive strength between a transparent plastic sheet and a low-refractive-index coat layer and to make an antireflection board durable by forming a high-refractive- index undercoat to be provided between the substrate and cost layer with polythiol and polyisocyanate. CONSTITUTION: The antireflection board 1 consists of a transparent substrate 2, a high-refractive-index undercoat 3 formed on the surface and a low- refractive-index antireflection coat 4 provided on the undercoat 3. The undercoat 3 is formed with a composition contg. an org. isocyanate, an org. polythiol or further a silicone-modified org. resin. Any aliphatic, alicyclic or aromatic compd. baving >=2 isocyanate groups are usable, appropriately, and tolglenediisocyanate, etc., are exemplified. A compd. having >=2 thiol groups in the molecule, especially an aliphatic compd., is used as the org. polythiol. |
