Coating composition
AssigneeSola International Holdings Ltd.
InventorsFang Chen, Huan Kiak Toh, Mark Christopher Fisher, Matthew John Cuthbertson
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Abstract
An ultraviolet irradiation curable primer composition for coating optical articles, in which the primer composition comprises: a dithiol or polythiol compound, and an allyl or vinyl monomer. The coating composition can further comprise photochromic dyes and additional polymerizable monomers.
Claims46
A coated optical article comprising:
- an optical article;
- and
- a primer coating on at least a surface of the optical article, the primer coating being formed from a cross-linkable primer coating composition which is UV curable and that comprises:
- a di- or polythiol compound;
- approximately 10 to 80% by weight of an allyl or vinyl monomer;
- and 0 to approximately 20% by weight of a polymerizable comonomer.
A cross-linkable primer coating composition for coating on a surface of an optical article, which composition is UV curable and comprises:
- approximately 15% to 80% by weight of a di- or polythiol compound that is selected from the group consisting of 4-mercaptomethyl-3,6-dithial,8-octanedithiol, trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetrakis, (3-mercapto-propionate), pentaerythritol tetrakis(3-mercaptoacetate) and mixtures thereof;
- approximately 10 to 80% by weight or a di- or poly allyl or vinyl monomer including an allyl component that is selected from the group consisting of diallyl isophthalate, tetraallyl pyromellitate, triallyl trimesate, triallyl isocyanurate, triallyl cyanurate, tetraallyloxyethane triallylamine, diethylene glycol bis(allyl)carbonate and mixtures thereof;
- and
- 0 to approximately 20% by weight of a polymerizable comonomer that is selected from the group consisting of epoxidized monomer or oligomer;
- vinyls;
- allylics;
- polyoxyalkylene glycol;
- di-, tri-, tetra- and higher acrylates or methacrylates;
- polymerizable bisphenol monomers;
- urethane monomers having 2 to 6 terminal acrylic or methacrylic groups;
- fluorene acrylates or methacrylates;
- thioacrylate or thiomethacrylate monomers;
- acrylic or methacrylic monomers;
- and mixtures thereof.
A cross-linkable primer coating composition for coating a surface of an optical article, which composition is UV curable in the presence of a photochromic dye component;
- and comprises:
- a di- or polythiol monomer;
- an allyl or vinyl monomer;
- a photochromic dye component;
- and
- optionally a polymerizable comonomer.
A coated optical article comprising:
- an optical article;
- and
- a primer coating on at least one surface of the optical article, the primer coating being receptive to the inclusion of dyes;
- the primer coating being formed by UV curing a cross-linkable primer coating composition comprising:
- a di- or polythiol compound;
- an allyl or vinyl monomer;
- and
- optionally a polymerizable comonomer.
A multi-coated optical article including
- an optical article;
- a primer coating on at least one surface of the optical article, the primer coating formed from across-link primer coating composition comprising:
- a di- or polythiol compound;
- an allyl or vinyl monomer;
- and
- optionally a polymerizable comonomer;
- and
- a secondary coating which provides a desirable optical and/or mechanical property to the optical article, which coating at least in part overlays the primer coating.
A multi-coated optical article including:
- an optical article;
- a primer coating on at least one surface of the optical article, the primer coating formed from a primer coating composition that comprises:
- a di- or polythiol compound;
- an allyl or vinyl monomer;
- and
- optionally a polymerizable comonomer;
- and
- a secondary anti-reflective and/or abrasion resistance coating, which coating at least in part overlays the primer coating and wherein the primer coating provides improved impact resistance to the optical article.
A method for preparing a coated optical article which method includes
- (a) providing a mould that is used to manufacture the optical article;
- a cross-linkable primer coating composition comprising:
- a di- or polythiol compound;
- an allyl or vinyl monomer;
- and
- optionally a polymerizable comonomer;
- and
- a cross-linkable polymeric casting composition;
- (b) applying a layer of the primer coating composition to at least a first face of the mould used to manufacture the optical article, wherein the first face is capable of imparting a desired optical configuration on a first optical surface of the optical article;
- (c) reacting the primer coating composition to a degree that it forms a dry film that is at least weakly adhered to the first face and that substantially replicates the first face in an aberration-free manner;
- (d) filling the mould with the cross-linkable polymeric casting composition;
- and
- (e) hardening the casting composition so as to form the optical article and adhere the dry primer coating to the first optical surface.
Dependencies are inferred from the claim text.