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US 5,015,523 AGranted
Coated synthetic resin lens
AssigneeSeiko Epson Corporation
InventorsHiroshi Kawashima, Mikito Nakashima, Takao Mogami
Life of this patent
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Abstract
Coated synthetic resin lenses having a primer layer of a copolymer of an acrylic and/or methacrylic monomer and an aromatic vinyl compound between the base material and a cured abrasion resistant layer of colloidal silica and an inorganic anti-reflection coating are provided. The cured coat of colloidal silica has a particle diameter between about 1 and 100 millimicrons and is dispersed in a hydrolyzed silane compound. The organic primer coating improves adhesion properties between the base material and the cured abrasion-resistant layer resulting in coated lenses of improved impact resistance.
Claims30
A coated synthetic resin lens comprising:
- a synthetic resin lens body;
- a primer coating formed of a copolymer of (1) at least 20% by weight of one of an acrylic and methacrylic monomer and (2) at least 10% by weight of an aromatic vinyl compound and having a thickness of between about 0.1 and 2 .mu.;
- a cured coat including colloidal silica having a solids content between about 35 and 75% by weight, an organic silane compound containing epoxy groups and having a solids content between about 25 and 50% by weight, additives having a solids content between about 0 and 25% by weight and between about 60 and 80% by weight of a solvent in a coating solution;
- and
- a dielectric anti-reflection layer formed on the cured coat,
- wherein the synthetic resin lens body is selected from the group consisting of:
- polydiethylene glycol bisallyl carbonate resin;
- polycarbonate resin;
- synthetic reins prepared from a copolymer formed by radical-polymerizing comonomers of formula I and II:
- ##STR8## wherein R.sub.4 is hydrogen or methyl, X.sup.1 and X.sup.2 are hydrogen or halogen other than fluorine, and m and n are both integers having a total between 0 and 8, inclusive;
- a resin material formed by radical polymerizing comonomers of formulae III, IV and V as major constituents;
- ##STR9## wherein R.sup.5 is --O--C.sub.2 H.sub.4 --, --O--C.sub.3 H.sub.3 -- or ##STR10## R.sup.6 is --O--, --S--, SO.sub.2 --, --CH.sub.2 -- or --C(CH.sub.3).sub.2, X.sup.1 is hydrogen or a halogen other than fluorine, l is an integer between 1 and 10, inclusive and m and n are both integers having a total between about 0 and 8, inclusive;
- polymethyl methacrylate resin;
- polystyrene resin;
- and
- diallyl phthalate resin.
13 more elements
A coated synthetic resin lens, comprising:
- a synthetic resin lens body, wherein the synthetic resin lens body is selected from the group consisting of polydiethylene glycol bisallyl carbonate resin;
- polycarbonate resin;
- synthetic resins prepared from a copolymer formed by radical-polymerizing comonomers of formulae I and II;
- ##STR14## wherein R.sup.4 is hydrogen or methyl, X.sup.1 and X.sup.2 are hydrogen or halogen other than fluorine, and m and n are both integers having a total between 0 and 8, inclusive;
- a resin material formed by radical polymerizing co-monomers of formulae III, IV and V as major constituents:
- ##STR15## wherein R.sup.5 is --O--C.sub.2 H.sub.4 --, --O--C.sub.3 H.sub.3 -- or ##STR16## R.sup.6 is --O--, --S--, --SO.sub.2 --, --CH.sub.2 -- or --C(CH.sub.3).sub.2 --, is halogen other than hydrogen or fluorine to read X.sup.1 is hydrogen or a halogen other than fluorine, l is an integer between 1 and 10, inclusive and m and n are both integers having a total between about 0 and 8, inclusive;
- polymethyl methacrylate resin;
- polystyrene resin;
- and diallyl phthalate resin;
- an impact resistant and adhesion promoting organic primer coating of a copolymer of at least 10% by weight of at least one aromatic vinyl compound and at least 20% by weight of at least one of an acrylic and a methacrylic monomer deposited on the lens body, the primer coating having a thickness of between about 0.1 to 2 .mu.;
- a cured coat, wherein the cured coat includes colloidal silica having a solids content between about 35 and 75% by weight, an organic silane compound including epoxy groups and having a solids content between about 25 and 50% by weight, additives having a solids contents between about 0 and 25% by weight and between about 60 and 80% by weight of a solvent in a coating solution deposited on the primer coating;
- and
- an anti-reflection layer deposited on the cured coat.
10 more elements
A method of preparing a synthetic resin lens comprising:
- providing a synthetic resin lens body selected from the group consisting of polydiethylene glycol bisallyl carbonate resin, polycarbonate resin, synthetic resins prepared from a copolymer formed by radical-polymerizing comonomers of formulae I and II;
- ##STR17## wherein R.sub.4 is hydrogen or methyl, X.sup.1 and X.sup.2 are hydrogen or halogen other than fluorine, and m and n are both integers having a total between 0 and 8, inclusive;
- a resin material formed by radical polymerizing co-monomers of formulae III, IV and V as major constituents:
- ##STR18## wherein R.sup.5 is --O--C.sub.2 H.sub.4 --, --O--C.sub.3 H.sub.3 -- or ##STR19## R.sup.6 is --O--, --S--, --SO.sub.2 --, --CH.sub.2 -- or --C(CH.sub.3).sub.2 --, X.sup.1 is hydrogen or a halogen other than fluorine, is an integer between 1 and 10, inclusive and m and n are both integers having a total between about 0 and 8, inclusive, polymethyl methacrylate resin, polystyrene resin, and diallyl phthalate resin;
- depositing a primer coating on the synthetic resin lens body, said primer coating having a thickness of between about 0.1 and 2 .mu. and including a copolymer of (1) at least 20% by weight of one of an acrylic and methacrylic monomer and (2) at least 10% by weight of an aromatic vinyl compound;
- depositing a cured coat on the primer coating including colloidal silica having a solids content between about 35 and 75% by weight, an organic silane compound containing epoxy groups and having a solids content between about 25 and 50% by weight, additives having a solids content between about 0 and 25% by weight and between about 60 and 80% by weight of a solvent in a coating solution;
- and
- forming a dielectric anti-reflection layer on the cured coat.
5 more elements
Dependencies are inferred from the claim text.