Layered product, optical part, processes for producing these, and coating fluid
AssigneeTokuyama Corporation
InventorsShinobu Izumi, Junji Momoda
Life of this patent
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Abstract
A laminated product has a multilayer structure comprising an optical base and a cured polyurethane resin layer formed thereon from a moisture-curable polyurethane resin and/or a precursor therefor. The polyurethane resin layer is formed by applying a coating fluid comprising a moisture-curable polyurethane resin and/or precursor therefor and a solvent having a boiling point of 70° C. or higher and a solubility parameter of 8 or larger. Also provided is a coating material comprising a radical-polymerizable monomer ingredient, a silicone or fluorochemical surfactant, and a photochromic compound. In producing a photochromic optical article, excellent adhesion between a base and a photochromic layer is attained.
Claims5
A laminated product comprising a layered structure in which a 0.1 to 10 μm thick polyurethane resin layer formed by applying a coating liquid consisting of a humidity-curing polyurethane resin and/or a precursor thereof, a solvent having a boiling point of 70° C. or higher and a solubility parameter of 8 or more, and a leveling agent on at least one surface of an optical base material, then removing the solvent, and curing the humidity-curing polyurethane resin and/or precursor thereof, and a 10-100 μm thick resin layer obtained by curing a composition which comprises a radically polymerizable monomer, a photochromic compound and a silicone base or fluorine base surfactant are laminated in this order on a surface of the optical base material, wherein the polyurethane resin layer is directly applied to the optical base material.
A production process for a laminated product, comprising:
- a step of forming a polyurethane resin layer by applying a coating liquid consisting of a humidity-curing polyurethane resin and/or a precursor thereof, a solvent having a boiling point of 70° C. or higher and a solubility parameter of 8 or more, and a leveling agent on at least one surface of an optical base material, then removing the solvent, and curing the humidity-curing polyurethane resin and/or precursor thereof, and
- a step of forming a 10-100 μm thick resin layer containing a photochromic compound by applying a curable composition comprising 100 parts by weight of a radically polymerizable monomer, 0.001 to 5 parts by weight of a silicone base or fluorine base surfactant and 0.01 to 20 parts by weight of a photochromic compound on the polyurethane resin layer and curing the curable composition,
- wherein the polyurethane resin layer is directly applied to the optical base material.
Dependencies are inferred from the claim text.