US20130230706A1 - Curable adhesive compositions - Google Patents

Curable adhesive compositions Download PDF

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Publication number
US20130230706A1
US20130230706A1 US13/865,705 US201313865705A US2013230706A1 US 20130230706 A1 US20130230706 A1 US 20130230706A1 US 201313865705 A US201313865705 A US 201313865705A US 2013230706 A1 US2013230706 A1 US 2013230706A1
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United States
Prior art keywords
acrylate
refractive index
component
phenyl
adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US13/865,705
Inventor
Yassin Turshani
Omar Mohamed Buazza
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PixelOptics Inc
Original Assignee
PixelOptics Inc
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Publication date
Application filed by PixelOptics Inc filed Critical PixelOptics Inc
Priority to US13/865,705 priority Critical patent/US20130230706A1/en
Publication of US20130230706A1 publication Critical patent/US20130230706A1/en
Abandoned legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04Homopolymers or copolymers of esters
    • C09J133/14Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00Processes of polymerisation
    • C08F2/46Polymerisation initiated by wave energy or particle radiation
    • C08F2/48Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C08F2/50Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00Processes of treating or compounding macromolecular substances
    • C08J3/28Treatment by wave energy or particle radiation
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04Homopolymers or copolymers of esters
    • C09J133/14Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • C09J133/16Homopolymers or copolymers of esters containing halogen atoms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/10Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/26Polymeric coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/40Properties of the layers or laminate having particular optical properties
    • B32B2307/418Refractive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2405/00Adhesive articles, e.g. adhesive tapes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2535/00Medical equipment, e.g. bandage, prostheses or catheter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2551/00Optical elements
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2852Adhesive compositions
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2852Adhesive compositions
    • Y10T428/287Adhesive compositions including epoxy group or epoxy polymer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2852Adhesive compositions
    • Y10T428/2878Adhesive compositions including addition polymer from unsaturated monomer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2852Adhesive compositions
    • Y10T428/2878Adhesive compositions including addition polymer from unsaturated monomer
    • Y10T428/2891Adhesive compositions including addition polymer from unsaturated monomer including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2852Adhesive compositions
    • Y10T428/2896Adhesive compositions including nitrogen containing condensation polymer [e.g., polyurethane, polyisocyanate, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31511Of epoxy ether
    • Y10T428/31515As intermediate layer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31547Of polyisocyanurate

Definitions

  • the present invention relates to curable laminating adhesives. More particularly, the present invention is directed to UV curable adhesive compositions having a refractive index that matches the refractive index of one or more substrates.
  • Adhesives have been widely used in various industries for many years, and numerous adhesives are commercially available. But finding a suitable commercially available adhesive to meet certain requirements is not always possible. In some cases, a suitable adhesive can be designed to meet particular specifications, and can take advantage of the availability of new monomers, additives, curing agents and new advanced in polymer processing technology.
  • Curable adhesives are well known. These include adhesives that are curable by radiation generally, as well as those that are curable by ultraviolet or visible light in particular. Unfortunately, known curable adhesives may suffer from a number of disadvantages. For example, many adhesives suffer from insufficient adhesion and/or inappropriate refractive index to match the refractive indices of the intended substrates. Many adhesives have a refractive index (RI) that is lower than 1.60, which is not suitable for lenses (e.g., electro-active lenses or composite lenses) made of plastic materials having an RI of 1.67 or higher. While there are a few adhesive compositions with high RI, they suffer from poor adhesion, unsuitable viscosity, or poor batch life. Some adhesives also require the use of solvents that must be evaporated during curing, and thus are not suitable for one or more electro-active assembly processes.
  • RI refractive index
  • curable adhesives especially UV curable adhesives, that exhibit a high RI, and preferably improved adhesion and viscosity.
  • curable adhesive compositions are provided that exhibit a high refractive index, acceptable viscosity, and/or acceptable adhesion.
  • devices are provided that include the adhesive composition disposed between two substrates.
  • the curable adhesive composition comprises at least one high index-high viscosity component having a refractive index, before curing, of at least 1.56 at 25° C., and a viscosity, before curing, of at least 15,000 cP at 25° C., and a photoinitiator.
  • the adhesive composition has a refractive index, after curing, of greater than 1.50.
  • the adhesive composition is curable by ultraviolet radiation.
  • the high index-high viscosity component may be an aromatic urethane acrylate (e.g., brominated aromatic urethane acrylate), tribromophenyl acrylate, or 9,9-bis ⁇ 4- (2-acryloyloxyethoxy)phenyl ⁇ fluorene.
  • the photoinitiator may include a radical photoinitiator, a cationic photoinitiator, or an anionic photoinitiator.
  • the radical photoinitiator may be selected from the non-limiting group of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, bis(2,6-dimethoxybezoyl)-2,4,4-trimethylpentyl phosphe-ine oxide, 2,4,6-trimethylbezoyldiphenylphosphine, 2,2-dimethoxy-2-phenylacetophenone, 4- (2-hydroxyethoxy)phenyl-(2-hydroxy-2-methlpropyl)ketone, 2-methyl thioxanthone, 2-isopropyl thioxanthone, 2-chloro thioxanthone, thoxanthone, xanthene, bezophenoe, 2-methyl-1-[4-methylthio)phenyl]-2-morpholino propan-1-
  • the radical photoinitiator is at least one of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, or 2-hydroxy-2-methyl-1-phenyl-propan-1-one.
  • the cationic photoinitiator may be selected from the non-limiting group of triaryl sulfonium salt hexafluoroantimonate, triaryl sulfonium hexafluorophosphate, bis(4-diphenylsulfomo)-phenyl]sufide-bis-hexafluorophosphate, di(alkylphenyl)iodonium salt, diaryl iodonium hexafluroantimonate, and iron-arene complex.
  • the anionic pbotoinitiator may be selected from the non-limiting group of O-nitrobenzyl derivatives, metal amine complexes, (cyclopentadienyl)ruthenium complexes, and (cyclopentadienyl)osmium complexes.
  • the photoinitiator comprises at least one additive, such as a co-catalyst, a phosphine, and/or an amine.
  • the additive can be phosphonium salts, tera alkylphosphonium bromide, tera alkylphosphonium chloride, triphenyl phosphine, trimethoxy phenyl phosphine, trichloro phenyl phosphine, alkyl amine primary, dialkyl amine, or trialkyamine.
  • the composition includes at least one vinyl resin (e.g., NTT #6205).
  • the composition contains at least one sulfur component, including, without limitation, 2-bis(2-mercapto ethylthio)-3-mercapto propane, trimethylolpropane tris(3-mercaptopropionate), 2-mercaptoethylthio-3-propanthiol sulfide, pentaerythritol tetrakis(2-mercaptopropoinate), 2,2′-thiodiethanethiol, trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 4,5-(mercaptomethylthio)-1,3-dithiolane, 4,6-(mercaptomethylthio)-1,3-dithiane, 1,1,3,3-tetra(mercaptomethylthio)propane, 2,3-episulfide propanyl disulfide, and 2,3-e
  • the composition contains at least one acrylic component, including, without limitation, polyethylene glycol o-phenyl phenyl ether acrylate, urethane acrylate, aliphatic urethane acrylate, acrylic oligomer, 2(2-ethoxyethoxy)ethyl acrylate, 2-phenoxyethyl acrylate, ethoxylated (4) trimethylolpropane triacrylate, ethoxylated (6)trimethylolpropane triacrylate, isobornyl acrylates, glycidyl methacrylate, 1,6 hexanediol diacrylate, alkoxylated phenol acrylate, alkoxylated phenol diacrylate, 2 hydroxyethyl acrylate, phenylthioethylacrylate, alkoxylated nonylphenol acrylate, ethoxlyated tribromo phenyl acrylate, tetrahydrofurfuryl
  • acrylic component
  • the composition contains a bisphenol A, including, without limitation, ethoxylated (10) bisphenol A diacrylate, ethoxylated (4) bisphenol A diacrylate, ethoxylated (4) bisphenol A dimethacrylate, diallylether bisphenol A, and ortho diallyl bisphenol A.
  • a bisphenol A including, without limitation, ethoxylated (10) bisphenol A diacrylate, ethoxylated (4) bisphenol A diacrylate, ethoxylated (4) bisphenol A dimethacrylate, diallylether bisphenol A, and ortho diallyl bisphenol A.
  • the composition contains at least one naphthalene component including, without limitation, 1-chloro naphthalene, 1-bromo naphthalene, and 1-naphthaldehyde.
  • the composition contains at least one epoxy resin including, without limitation, poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide and epoxy acrylates.
  • the adhesive composition has a refractive index, after curing, of about 1.60 to about 1.74.
  • These compositions can contain about 0.01 wt % to about 5 wt % of at least one photoinitiator and about 1 wt % to about 70 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylate; tribromophenyl aery late; and 9,9-bis ⁇ 4- (2-acryloyloxyethoxy)phenyl ⁇ fluorene.
  • the photoinitiator may include one or more of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, triaryl sulfonium salt hexafluoroantimonate, and triaryl sulfonium hexafluorophosphate.
  • the adhesive composition may also contain about 10 wt % to about 95 wt % of at least one vinyl resin.
  • These adhesive compositions may also contain about 2 wt % to about 50 wt % of at least one acrylic component selected from the group consisting of polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; acrylic oligomer; isobornyl acrylates; phenylthioethylacrylate; and ethoxlyated tribromo phenyl acrylate.
  • acrylic component selected from the group consisting of polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; acrylic oligomer; isobornyl acrylates; phenylthioethylacrylate; and ethoxlyated tribromo phenyl acrylate.
  • These adhesive compositions may also contain at least one sulfur component selected from the non-limiting group consisting of 1,2-bis(2-mercapto ethylthio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); 2,2′-thiodiethanethiol; trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide; 2,5-dimercaptomethyl-1,4-dithiane; 4,5-(mercaptomethylthio)-1,3-dithiolane; 4,6-(mercaptomethylthio)-1,3-dithiane; 1,1,3,3-tetra(mercaptomethylthio)propane; 2,3-episulfide propanyl disulfide
  • the composition comprises about 1 wt % to about 30 wt % of at least one sulfur component selected from the group consisting of 1,2-bis(2-mercapto ethyltbio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); and 2,2′-thiodiethanethiol.
  • at least one sulfur component selected from the group consisting of 1,2-bis(2-mercapto ethyltbio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); and 2,2′-thiodiethanethiol.
  • These adhesive compositions may also contain about 5 wt % to about 25 wt % of at least one at least one naphthalene component selected from the group consisting of 1-chloro naphthalene; 1-bromo naphthalene; and 1-naphthaldehyde.
  • These adhesive compositions may also contain a bisphenol A component selected from the group consisting of diallylether bisphenol A and ortho diallyl bisphenol A.
  • These adhesive compositions may also contain an epoxy resin selected from the group consisting of poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide; and epoxy acrylates.
  • an epoxy resin selected from the group consisting of poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide; and epoxy acrylates.
  • the adhesive composition has a refractive index, after curing, of about 1.55 to about 1.60.
  • These compositions can contain about 0.01 wt % to about 5 wt % of at least one photo initiator; about 10 wt % to about 60 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; tribromo phenyl aery late; and 9,9-bis ⁇ 4- (2-acryioyioxyethoxy)phenyl ⁇ fluorine; and about 1 wt % to about 60 wt % of at least one acrylic component selected from the group consisting of 2(2-ethoxyethoxy) thyl acrylate; 2-phenoxyethyl aery late; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; alkoxylated phenol acrylate; 2
  • these adhesive compositions can contain about 0.01 wt % to about 5 wt % of at least one photoinitiator selected from the group consisting of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide; 1-hydroxcyclohexylphenylketone; and 2-hydroxy-2-methyl-1-phenyl-propan-1-one; about 10 wt % to about 60 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; and about 1 wt % to about 60 wt % of at least one acrylic component selected from the group consisting of 2(2-ethoxyethoxy) ethyl acrylate; 2-phenoxyethyl acrylate; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; alkoxylated phenol acryl
  • These adhesive compositions may also contain a sulfur component selected from the group consisting of 2-mercaptoethylthio-3-propanthiol sulfide; 2,2′-thiodiethanethiol; and trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide.
  • a sulfur component selected from the group consisting of 2-mercaptoethylthio-3-propanthiol sulfide; 2,2′-thiodiethanethiol; and trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide.
  • These adhesive compositions may also contain an epoxy resin (e.g., epoxy acrylates).
  • an epoxy resin e.g., epoxy acrylates
  • These adhesive compositions may also contain a bisphenol A component selected from the group consisting of ethoxylated (10) bisphenol A diacrylate; ethoxylated (4) bisphenol A diacrylate; and ethoxylated (4) bisphenol A dimethacrylate.
  • a bisphenol A component selected from the group consisting of ethoxylated (10) bisphenol A diacrylate; ethoxylated (4) bisphenol A diacrylate; and ethoxylated (4) bisphenol A dimethacrylate.
  • These adhesive compositions may also contain triallyl isocyanurate.
  • the adhesive composition has a refractive index, after curing, of about 1.49 to about 1.55.
  • These adhesive compositions can contain about 0.01 wt % to about 5 wt % of at least one pbotoinitiator; and about 5 wt % to about 80 wt % of at least one acrylic component selected from the group consisting of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimetbyiolpropane triacrylate; ethoxylated (6) trimetbyiolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; alkoxylated phenol diacrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; ethoxylated (10) bisphenol A diacrylate; 2-phenoxyethyl acrylate; is
  • the acrylic component is selected from the non-limiting group of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; and ethoxylated (10) bisphenol A diacrylate.
  • These adhesive compositions may also contain about 10 wt % to about 50 wt % of at least one high index-high viscosity component (e.g., brominated aromatic urethane acrylates).
  • at least one high index-high viscosity component e.g., brominated aromatic urethane acrylates.
  • These adhesive compositions may also contain a sulfur component selected from the group consisting of trimethylolpropane tris(3-mercaptopropionate) and pentaerythritol tetrakis(2-mercaptopropoinate).
  • a sulfur component selected from the group consisting of trimethylolpropane tris(3-mercaptopropionate) and pentaerythritol tetrakis(2-mercaptopropoinate).
  • a device in another embodiment, comprises a first and second substrate, e.g., ophthalmic component, and a curable adhesive composition (as described in any of the embodiments) disposed between the first and second ophthalmic components.
  • the refractive index of the adhesive composition after curing, is i) about equal to the refractive index of at least one of the first ophthalmic component and the second ophthalmic component, ii) between the refractive index of the first lens and the refractive index of the second lens, or iii) about equal to the average refractive index of the first ophthalmic component and the second ophthalmic component.
  • the refractive index of the adhesive composition after curing, is within 0.03 of the refractive index of at least one of the first ophthalmic component and the second ophthalmic component. In another embodiment, at least one of the first ophthalmic component and the second ophthalmic component has a refractive index of about 1.67.
  • curable adhesive compositions are provided that exhibit a high refractive index, acceptable viscosity, and/or acceptable adhesion.
  • Devices are also provided that include the adhesive composition disposed between two substrates.
  • a portion of the assembly process can include two preformed plastic lenses, one of which has a lens surface comprising a diffractive pattern filled with electro-active material (i.e., liquid crystal), that are subsequently bonded together. Because of the diffractive pattern, the laminate surfaces can generate a thin cavity (e.g., in the range of 30-70 microns thick). The thickness of this cavity can depend on the diffractive design.
  • electro-active material i.e., liquid crystal
  • the cavity formed between the lens substrates can be filled with a UV curable adhesive composition having a refractive index (RI) that matches the RI of the preformed lenses to hide the seal features.
  • RI refractive index
  • the value of RI of the adhesive composition can be between (e.g., an average of) the two RIs of the preformed lenses) to reduce or eliminate light interference due to the difference in RI of the two preformed lenses.
  • RI 1.58 refractive index
  • RI 1.53 a suitable adhesive composition can have an RI, after curing, of about 1.55.
  • the compositions may be suitable for adhering a wide variety of lens materials, including electro-active lenses and composite lenses.
  • the adhesives are particularly suitable for use with plastic materials having an RI of about 1.67 or higher.
  • the adhesives may be used to laminate one or more of the following substrate materials: polycarbonate (RI 1.58), Trivex® (RI 1.53), and MR-10 (RI 1.67).
  • the laminated substrates may be the same as, or different from, one another.
  • the refractive index of the adhesive composition is reported after curing at 25° C., (Curing increases the RI of the adhesive composition by about 0.01-0.05, more specifically about 0.03.) In contrast, unless otherwise specified, the RI of the individual components of the adhesive are reported before curing at 25° C.
  • the adhesive compositions provided herein have a refractive index of at least 1.49, preferably at least 1.50, 1.53, 1.55, 1.56, 1.57, 1.60, 1.63, 1.65, 1.67, or 1.70.
  • the adhesive compositions described herein are categorized as high index, mid-index, and low index adhesives (see Examples), but such distinctions are used merely to categorize the compositions relative to one another. All of the compositions described herein, including the “low” and “mid” index examples, have a refractive index that is higher than most typical adhesives.
  • the low index adhesives described herein have a refractive index of about 1.49 to about 1.55.
  • the mid-index adhesives have a refractive index of about 1.55 to about 1.6.
  • the high index adhesives have a refractive index of about 1.6 to about 1.74.
  • Viscosity of an adhesive composition is an important parameter that affects manufacturing. Viscosity is not a predictable feature of a composition; it can not be calculated strictly by weight average. For example, although adding a low viscosity component to a composition will dilute the viscosity of the composition, the precise reduction in viscosity cannot be predicted based on the amount, e.g, percent weight, and viscosity of the individual component added. Accordingly, achieving an acceptable viscosity of the adhesive composition requires an understanding of the manufacturing process to be employed as well as the balancing of the various adhesive components as taught herein.
  • the curable adhesive can have a predetermined or desired viscosity value to flush away the excess liquid crystal that may overflow into the cavity during the assembly process.
  • a predetermined or desired viscosity value to flush away the excess liquid crystal that may overflow into the cavity during the assembly process.
  • compositions with viscosity of about 100 cP or less may break the diffractive seal during the filling process and consequently could contaminate the electro-active material inside the diffractive pattern.
  • low viscosity adhesive compositions may be suitable to laminate two preformed lenses that do not comprise diffractive patterns.
  • the viscosity of the adhesive composition, before curing is about 200 to about 5000 cP, about 1000to about 3000 cP, or about 1000 to about 2000 cP.
  • the adhesive compositions provided herein can also be used in surface casting, which includes applying the adhesive composition to one preformed lens and then casting another lens on the top of the original preformed lens.
  • Adhesion performance is also a high priority.
  • the adhesive compositions can be designed to avoid frozen-in stresses and voids, which can be caused by adhesive shrinkage.
  • the adhesive can comprise monomers with a lower number of reactive functional groups, or they can comprise high molecular weight oligomers or pre-polymers. It is desired for the adhesive composition to be able to wet and spread on a substrate surface. This molecular- level contact allows the forces of adhesion to develop, removes entrapped air from the interface, and maximize the area over which bond can develop. For a clean, smooth substrate, wetting and spreading is governed by the surface tensions of the two materials.
  • the adhesive compositions described herein can be formed as blends of reactive monomers, oligomers or pre-polymers, photoinitiator(s), and optional silane coupling agent.
  • the adhesive compositions can contain a high index-high viscosity component and a pbotoinitiator.
  • the curable adhesive composition contains at least one high index-high viscosity component having a refractive index, before curing, of at least 1,56 at 25° C., and a viscosity, before curing, of at least 15,000 cP at 25° C.
  • the high index-high viscosity component has a refractive index of at least about 1.58, 1.60, or 1.62.
  • the high index-high viscosity component has a viscosity of at least about 20,000, 40,000, 60,000, 70,000, 80,000, or 90,000 cP at 25° C.
  • Exemplary high index-high viscosity components include, but are not limited to, aromatic urethane acrylate (e.g., brominated aromatic urethane acrylate), tribromophenyl acrylate, or 9,9-bis ⁇ 4- (2-acryloyloxyethoxy)phenyl ⁇ fluorene.
  • a high index-high viscosity component (or a combination of more than one high index-high viscosity components) can be present in an amount of about 1 to about 70%, about 10 to about 60%, about 10% to about 50%, about 10% to about 30%, or about 10% to about 20%.
  • the selection of the resin in addition to good adhesion, can be made to establish mainly the refractive index match between the cured composition and the substrates.
  • the RI match should be the same or very close, e.g., within 0.02, to hide the diffractive seal features.
  • the RI of the adhesive composition can be about 1.64 to about 1.70. Even though some commercially available adhesives may exhibit a high RI, they often exhibit poor adhesion.
  • an adhesive for bonding two MR-10 lenses contains:
  • Aromatic monoacrylate oligomer (CN-131B supplied by Sartomer ⁇
  • Phenyl bis(2,4,6-trimethyl benzoyl)phosphine oxide (Irgacure 819 supplied by Ciba).
  • the amount of NTT #6205 is less than 5%
  • the final RI of the adhesive composition may be too low, and there may be insufficient RI match to the MR-10preformed lenses.
  • the amount of NTT #6205 is higher than 60%, then the RI may be too high, and the adhesion performance becomes poor.
  • a sulfur component e.g., a multifunctional thiol resin
  • the exemplary resin blend described above suitable for laminating MR-10 lenses may include as the sulfur component:
  • composition #8323 supplied by NTT
  • 10-50% CN-2600 10-20% NKE-10
  • compositions include 30-60% vinyl resin (NTT #6205) and 0.01-5% Irgacure 819, as well as: 20-40% CN-2600, and 10-50% NK-A-BPEF (supplied by Kowa); or 30-65% Vinyl Naphthalene, 0-70% CN-2600, 0-50% 1,2-bis(2-mercapto ethyl thio)propane, and 0-70% NK-A-BPEF.
  • compositions include 0-40% vinyl resin (NTT #6205) and 0.01-5% Irgacure 819, as well as:
  • Resin blends suitable for use in surface casting Trivex® to preformed MR-10 lenses can include 30-70% CN-2600 and 30-70% NK-10.
  • Resin blends suitable for use in surface casting Trivex® to preformed polycarbonate lenses can include 5-50% CN-2600, 5-15% Ethoxylated (6)trimethylolpropane triacrylate (SR 499), 20-50% Ethoxylated(4)bisphenol A diacrylate (SR601), 5-15% 2-Hydroxy ethyl acrylate, and 5-10%, Alkoxylated phenol acrylate (D9088).
  • curable adhesive compositions Commercially available components that may be useful for preparing the curable adhesive compositions include, but are not limited to:
  • NKE-10 Polyethylene glycol 0-phenyl phenyl ether acrylate
  • NK. A-BPEF 9,9 Bis[ 4- (2-acryloxyethoxy)phenyl fluorene
  • tribromophenyl acrylate Kowa American Corp.
  • Acrylic oligomer (CN131B), Epoxy acrylate oligomer (CN110), Epoxy methacrylate (CN151), Ethoxylated (3)-bisphenol A diacrylate (SR349), Ethoxylated (2) bisphenol A dimethacrylate (SR348), Ethoxylated (4) bisphenol A diacrylate (SR601), 2-Phenoxyethyl acrylate (SR339), Alkoxylated phenol acrylate (D9088), Ethoxylated (2) bisphenol A dimethacrylate SR101, Ethoxylated (6) bispehenol A dimethacrylate (SR504), Alkoxylated phenol acrylate (SR614), Ethoxylated (6) trimethylolpropane triacrylate (SR499), Alkoxylated aliphatic diacrylate (SR9209), Polyethylene glycol(400)diacrylate (SR344), 1,6 Hexanediol diacrylate (SR239), Tetrahydrofurfur
  • the photoinitiator absorbs light and is responsible for the production of free radicals in a free radical polymerized system or cations in a cationic photoinitiated system.
  • photoinitiators commercially available, and a suitable photoinitiator can be selected by considering the following factors:
  • the radiation source The absorption bands of the photoinitiators should generally substantially overlap the emission spectra of the light source.
  • the adhesive can be used to bond two substrates, e.g., preformed transparent plastic lenses. One or both substrates may block UV block light (a common practice for eye protection from sunlight). In this case, the absorption band of the photointiator can be outside the absorption band of the substrates.
  • the photoinitiator concentration can be about 0.01 to about 10%, preferably about 0.01to about 5%, about 0.1 to about 3%, or about 0.1 to about 1.5%.
  • Preferred components of the photoinitiator system include one or more of: Phenyl bis(2,4,6-trimethyl benzoyl)phosphine oxide (Irgacure 819),
  • Triaryl sulfonium salt hexafluoroantimonate and triaryl sulfonium hexafluorophosphate (Cyracure ⁇ UVI-6976).
  • the photoinitiator may include a radical photoinitiator, a cationic photoinitiator, or an anionic photoinitiator.
  • Radical photoinitiator include, but are not limited to, bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, bis(2,6-dimethoxybezoyl)-2,4,4-trimethylpentyl phosphe-ine oxide, 2,4,6-trimethylbezoyldiphenylphosphine, 2,2-dimethoxy-2-phenylacetophenone, 4- (2-hydroxyethoxy)phenyl-(2-hydroxy-2-methlpropyl)ketone, 2-methyl thioxanthone, 2-isopropyl thioxanthone, 2-chloro thioxanthone, thoxanthone, xanthene, bezophenoe, 2-methyl-1-[4-methylthio)phenyl]-2-morpholino propan-1-one,
  • Preferred exemplary radical photoinitiators include bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, and 2-hydroxy-2-methyl- 1-1 -phenyl-propan-1-one.
  • Cationic photoinitiators include, but are not limited to, triaryl sulfonium salt hexafluoroantimonate; triaryl sulfonium hexafluorophosphate, bis(4-diphenylsulfonio)-phenyl]sufid-bis-hexafluorophosphate, di(alkylphenyl) iodonium salt, diaryl iodonium hexafluroantimonate, and iron-arene complex.
  • Anionic photoinitiators include, but are not limited to, O-nitrobenzyl derivatives, metal amine complexes, (cyclopentadienyl)ruthenium complexes, and (cyclopentadienyl)osmium complexes.
  • the photoinitiator system includes at least one additive such as a co-catalyst, a phosphine, and/or an amine.
  • additives include, but are not limited to, phosphonium salts, tera alkylphosphonium bromide, tera alkylphosphonium chloride, triphenyl phosphine, trimethoxy phenyl phosphine, trichloro phenyl phosphine, alkyl amine primary, dialkyl amine, and trialkyamine.
  • the adhesive composition may further contain up to about 10% of a partially or fully hydrolyzed silane coupling agent as an adhesion promoter/coupling agent.
  • silanes include, but are not limited to, 3-Methacryloxypropyl trimethoxysilane, 3-Amino-propyl trimethoxysilane, and 3-Glycidoxypropyltrimethoxysilane.
  • the composition may contain at least one vinyl resin.
  • the vinyl resin advantageously exhibits a lower viscosity to dilute the high index-high viscosity component while simultaneously improving adhesion.
  • a preferred vinyl resin is NTT #6205.
  • the vinyl resin(s) can be present in an amount of, e.g., about 10 to about 95%, about 20 to about 60%, or about 30 to about 40%.
  • the composition may contain at least one sulfur component. Without being bound by theory, it is thought that the sulfur component improves adhesion.
  • sulfur components include, but are not limited to, 2-bis(2-mercapto ethylthio)-3-mercapto propane, trimethylolpropane tris(3-mercaptopropionate), 2-mercaptoethylthio-3-propanthiol sulfide, pentaerythritol tetrakis(2-mercaptopropoinate), 2,2′-thiodiethanethiol, trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 4,5-(mercaptomethylthio)-1,3-dithiolane, 4,6-(mercaptomethylthio)-1,3-dithiane, 1,1,3,3-tetra(mercaptomethylthio)propan
  • the composition may contain at least one acrylic component.
  • acrylic component improves adhesion.
  • acrylic components may also advantageously contribute to the high refractive index of the final composition.
  • aromatic acrylates, and particularly halogenated aromatic acrylates exhibit high RI.
  • acrylic components include, but are not limited to, polyethylene glycol o-phenyl phenyl ether acrylate, urethane acrylate, aliphatic urethane acrylate, acrylic oligomer, 2(2-ethoxyethoxy) ethyl acrylate, 2-phenoxyethyl acrylate, ethoxylated (4) trimethylolpropane triacrylate, ethoxylated (6) trimethylolpropane triacrylate, isobornyl acrylates, glycidyl methacrylate, 1,6 hexanediol diacrylate, alkoxylated phenol acrylate, alkoxylated phenol diacrylate, 2 hydroxyethyl acrylate, phenylthioethylacrylate, alkoxylated nonylphenol acrylate, ethoxlyated tribromo phenyl acrylate, tetrahydrofurfuryl acrylate, t
  • the acrylic component includes a urethane acrylate.
  • the acrylic component(s) can be present in an amount of, e.g., about 5 to about 80%, about 1 to about 60%, or about 2 to about 50%, about 5to about 30%.
  • the composition may contain a bisphenol A
  • a bisphenol A improves the mechanical properties of the adhesive composition by, e.g., preventing film breakdown.
  • Exemplary bisphenol A components include, but are not limited to, ethoxylated (10) bisphenol A diacrylate, ethoxylated (4) bisphenol A diacrylate, ethoxylated (4) bisphenol A dimethacrylate, diallylether bisphenol A, and ortho diallyl bisphenol A.
  • the bisphenol component(s) can be present in an amount of, e.g., about 1 to about 70%, about 5 to about 25%, or about 30 to about 60%.
  • the composition may contain at least one naphthalene component.
  • the naphthalene component exhibits a relatively high refractive index (though not typically as high as the high index-high viscosity component) while exhibiting a lower viscosity to balance the high index-high viscosity component.
  • Exemplary naphthalene components include, but are not limited to, 1-chloro naphthalene, 1-bromo naphthalene, and 1-naphthaldehyde.
  • the naphthalene components can be present in an amount of, e.g., about 5 to about 25%o or about 10% to about 2%.
  • the composition may contain at least one epoxy resin.
  • exemplary epoxy resins include, but are not limited to, poly[(phenyl glycidyl ether)-co-formaldehyd]oligomeric epoxide and epoxy acrylates.
  • particular components may be preferred depending on the desired refractive index outcome.
  • preferred components for the low, mid-, and high index adhesives are provided. Numerous low, mid-, and high index adhesive compositions are also provided in the Examples.
  • the low index adhesives provided herein generally comprise at least one acrylic component in addition to the photoinitiator and high index-high viscosity component.
  • Preferred components include:
  • At least one acrylic component selected from the group consisting of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; alkoxylated phenol diacrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; ethoxylated (10) bisphenol A diacrylate; 2-phenoxyethyl acrylate; isobornyl acrylates; tetrahydrofurfuryl acrylate; tetrahydrofurfuryl methacrylate; and polyethylene glycol (200) diacrylate; more particularly
  • At least one acrylic component selected from the group consisting of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; and ethoxylated (10) bisphenol A diacrylate.
  • Additional preferred components for the low index adhesives include:
  • a sulfur component selected from the group consisting of trimethylolpropane tris(3-mercaptopropionate) and pentaerythritol tetrakis(2-mercaptopropoinate)
  • the mid-index adhesives provided herein (RI of about 1.55 to about 1.6) generally comprise at least one of an acrylic component in addition to the photoinitiator and high index-high viscosity component.
  • Preferred components include:
  • At least one radical photoinitiator selected from the group consisting of bis(2,3,6-trimethlbenzoyl)-phenylphosphirieoxide; 1-hydroxcyclohexylphenylketone; and 2-hydroxy-2-methyl-l -phenyl-propan-1-one;
  • At least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; tribromo phenyl acrylate; and 9,9-bis ⁇ 4-(2-acryloyloxyethoxy)phenyl ⁇ fluorine; more particularly
  • Additional preferred components for the mid-index adhesives include:
  • a sulfur component selected from the group consisting of 2-mercaptoethylthio-3-propanthiol sulfide; 2,2′-thiodiethanethiol; and trimethyloltris(3-mercaptopropoinate)oethylthio-3propanthiol sulfide;
  • an epoxy resin selected from the group consisting of epoxy acrylates
  • a bisphenol A component selected from the group consisting of ethoxylated (10) bisphenol A diacrylate; ethoxylatedH (4) bisphenol A diacrylate; and ethoxylatedH (4) bisphenol A dimethacrylate; and/or
  • the high index adhesives provided herein (RI of about 1.6 to about 1.74) generally comprise a photoinitiator and high index-high viscosity component.
  • Preferred components include:
  • At least one photoinitiator e.g., bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, triaryl sulfonium salt hexafluoroantimonate, and/or triaryl sulfonium hexafluorophosphate
  • at least one photoinitiator e.g., bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, triaryl sulfonium salt hexafluoroantimonate, and/or triaryl sulfonium hexafluorophosphate
  • the high index adhesive includes at least one vinyl resin (e.g., NTT #6205).
  • the vinyl resin may be present in an amount of, e.g., about 10 wt % to about 95 wt %.
  • Additional preferred components for the high index adhesives include:
  • At least one acrylic component selected from the group consisting of polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; acrylic oligomer; isobornyl acrylates; phenylthioethylacrylate; and ethoxlyated tribromo phenyl acrylate;
  • At least one sulfur component selected from the group consisting of 1,2-bis(2-mercaptoethylthio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); 2,2′-thiodiethanethiol; trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide; 2,5-dimercaptomethyl-1,4-dithiane; 4,5-(mercaptomethylthio)-1,3-dithiolane; 4,6-(mercaptomethylthio)-1,3-dithiane; 1,1,3,3-tetra(mercaptomethylthio)propane; 2,3-episulfide propanyl disulfide; and 2,3-episulfide
  • At least one sulfur component selected from the group consisting of 1,2-bis(2-mercapto ethylthio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); and 2,2′-thiodiethanethiol;
  • naphthalene component selected from the group consisting of 1-chloro naphthalene; 1-bromo naphthalene; and 1-naphthaldehyde;
  • a bisphenol A component selected from the group consisting of diallylether bisphenol A; and ortho diallyl bisphenol A; and/or
  • an epoxy resin selected from the group consisting of poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide; and epoxy acrylates.
  • the adhesive compositions are curable by exposure to radiation (a light source), preferably ultraviolet or ultraviolet-visible light. Curing can be conducted after the lamination process, which means the light passes through the lens assembly to reach the adhesive.
  • a light source preferably ultraviolet or ultraviolet-visible light. Curing can be conducted after the lamination process, which means the light passes through the lens assembly to reach the adhesive.
  • the light source can provide emission bands of wavelengths longer than 400 nm such as Actinic light sources or LED light sources.
  • the exposure time required to cure the adhesive compositions can vary and can depend on the light source, photoinitiator concentration, and the distance of the source from the substrate. One of ordinary skill in the art would readily appreciate how to adapt the exposure time accordingly.
  • Exemplary light sources include, but are not limited to:
  • the curing chamber can include a conveyer transporting the sample underneath the lamp.
  • the plane of the conveyer can be positioned approximately 3 inches from the lamp.
  • the light energy can be set at approximately 1000 mJ/cm2 measured with Model ILT 390 Light Bug from International Light, Inc. over the range of 250 to 400 nm in one pass;
  • Actinic Light Source Two sets of four fluorescent lamps can be positioned above and below to provide substantially uniform radiation over the plane of the curing stage. Approximately 4.9 mW/cm2 measured at the plane of sample from the top lamps and approximately 4.1 mW/cm2 from the bottom lamps with International light meter model IL1400A with XRL 140A detector. These lamps emit activating light in the range of greater than about 380 nm and are commercially available from Philips Electronics as model TLD-15W/03;
  • LED sources such as a custom LED array with a main wavelength at 411 ⁇ 4 nm;
  • DYMAX Blue WaveTM 50 UV Spot Light with the UV main output of about 3000 ⁇ mW/cm2 at 365 nm, 410 nm, and at 430nm.
  • the adhesive compositions provided herein can be used to bond substrates, e.g., ophthalmic components.
  • the adhesive can be applied in a number of ways readily apparent to one of ordinary skill, in the art including, but not limited to, spinning, dipping, brushing, spraying, and filling.
  • the substrates to be laminated can be the same as or different from one another.
  • the adhesive is disposed between two substrates, each, with a different RI.
  • the RI of the cured adhesive composition can have a RI value close to the average RI of the two lenses.
  • the RI of the cured adhesive composition should be in the range of about 1.54 to about 1.57, and preferably about 1.55 to about 1.56.
  • the advantage of having an adhesive RI close to the RI of both lenses is to reduce or eliminate light interference resulting from the difference in RI of the two lenses.
  • a device comprising a) a first substrate, e.g., ophthalmic component, b) a second substrate, e.g., ophthalmic component, and c) a curable adhesive composition disposed between the first and second ophthalmic components.
  • the adhesive can be any of the adhesives described herein, such as those comprising at least one high index-high viscosity component having a refractive index, before curing, of at least 1.56 at 25° C., and a viscosity, before curing, of at least 15,000 cP at 25° C., and a photoinitiator.
  • the refractive index of the adhesive composition after curing, is i) about equal to the refractive index of at least one of the first ophthalmic component and the second ophthalmic component, ii) between the refractive index of the first lens and the refractive index of the second lens, or iii) about equal to the average refractive index of the first ophthalmic component and the second ophthalmic component.
  • the refractive index of the adhesive composition, after curing is within 0.03, preferably within 0.02, of the refractive index of at least one of the first ophthalmic component and the second ophthalmic component.
  • at least one of the first ophthalmic component and the second ophthalmic component has a refractive index of about 1.67.
  • the amount of the solid photoinitiator to be used can be taken from pre-dissolved concentrated form in the range of 3-6% by weight.
  • High viscosity and/or non-pourable components can be preheated and mixed with others.
  • Solid monomers or oligomers can also be preheated and mixed with a low viscosity component before adding a predetermined amount of initiator.
  • the final composition can be mixed for at least 10 to 15 minutes away from light before storing it in a brown polypropylene bottle at regular room temperature conditions.
  • the components that form the light curable adhesive were used as received. Exemplary components are listed in the Tables below.
  • a first substrate e.g., a pre-cleaned round, flat piece of uncoated MR-10 having a diameter of about 44 mm and a thickness of about 1.2 mm (supplied by PixelOptics, Inc.).
  • a second substrate e.g., the same as the first, is placed with a gentle contact to the adhesive on top the first piece until the adhesive spreads to the edge of the substrates.
  • the assembly then proceeds to the curing step, e.g., it is placed on an actinic light source curing stage.
  • the curing stage is about 5mm thick round clear crown glass and is about 80 mm in diameter.
  • the assembly is exposed to the light from the top and bottom for 1.5 min.
  • the cured assembly is examined and left at room temperature for at least 10 min before the adhesion test.
  • Refractive Index Measurement Abbe-3L Refractometer from Fisher Scientific was used to measure the refractive index of the adhesives in liquid state (before curing) or solid cured state. This Refractometer has an index range from 1.30 to 1.71 relative to Sodium D line (589.3nm), 1-bromonaphthalene from Fisher Scientific was used as contact liquid for solid test pieces with indices less 1.64 nD, and Series M 1.75 nD from Cargill was used as contact liquid for solid test pieces with indices more than 1.64 nD.
  • Adhesion Strength The adhesion strength was evaluated based on how much effort was needed to separate the two glued pieces.
  • a hand-held, mold scraper tool commercially available under parts code TTAR 05-020 for the handle and TTAR 05-021 for the de-molding blade from Optical Dynamics was used to separate the two glued pieces and assign poor, good or excellent adhesion ratings as follows:
  • the adhesive compositions that exhibited good RI match and good adhesion in the initial screening tests were further tested for adhesion performance and RI match in actual lens laminates to form composite lens.
  • the adhesion performance was tested by surfacing and edging of the final lens laminate looking for any sign of delamination. All preferred adhesive compositions show good RI match and good or excellent adhesion.
  • compositions listed in the table above yield adhesives that provide a good RI match, as indicated by the invisible seal fixtures of the diffractive pattern region. Most exhibit good adhesion, while some (labeled in bold) exhibit excellent adhesion strength.
  • compositions listed in the table above yield adhesives that provide good adhesion and good RI match. These compositions may be useful to surface cast Trivex® to preformed MR-10 lens, since they have an RI between the RI of MR-10 (1.67) and Trivex® (1.53).
  • compositions listed in the table above yield adhesives that provide good adhesion and also good RI match. These composition may be useful to adhere polycarbonate and Trivex® substrates, since they have an RI between the RI of polycarbonate (1.58) and Trivex® (1.53).

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Abstract

Curable adhesive compositions are provided that exhibit a high refractive index.

Description

    CROSS-REFERENCES TO RELATED APPLICATIONS
  • This application claims the benefit of U.S. Provisional Patent Application Nos. 61/168,401 filed Apr. 10, 2009; 61/229,031 filed Jul. 28, 2009; and 61/234,536 filed Aug. 17, 2010, each of which is incorporated by reference herein in its entirety.
  • FIELD OF THE INVENTION
  • The present invention relates to curable laminating adhesives. More particularly, the present invention is directed to UV curable adhesive compositions having a refractive index that matches the refractive index of one or more substrates.
  • BACKGROUND OF THE INVENTION
  • Adhesives have been widely used in various industries for many years, and numerous adhesives are commercially available. But finding a suitable commercially available adhesive to meet certain requirements is not always possible. In some cases, a suitable adhesive can be designed to meet particular specifications, and can take advantage of the availability of new monomers, additives, curing agents and new advanced in polymer processing technology.
  • Curable adhesives are well known. These include adhesives that are curable by radiation generally, as well as those that are curable by ultraviolet or visible light in particular. Unfortunately, known curable adhesives may suffer from a number of disadvantages. For example, many adhesives suffer from insufficient adhesion and/or inappropriate refractive index to match the refractive indices of the intended substrates. Many adhesives have a refractive index (RI) that is lower than 1.60, which is not suitable for lenses (e.g., electro-active lenses or composite lenses) made of plastic materials having an RI of 1.67 or higher. While there are a few adhesive compositions with high RI, they suffer from poor adhesion, unsuitable viscosity, or poor batch life. Some adhesives also require the use of solvents that must be evaporated during curing, and thus are not suitable for one or more electro-active assembly processes.
  • A need therefore exists for curable adhesives, especially UV curable adhesives, that exhibit a high RI, and preferably improved adhesion and viscosity.
  • BRIEF SUMMARY OF THE INVENTION
  • In one embodiment, curable adhesive compositions are provided that exhibit a high refractive index, acceptable viscosity, and/or acceptable adhesion. In another embodiment, devices are provided that include the adhesive composition disposed between two substrates.
  • In one embodiment, the curable adhesive composition comprises at least one high index-high viscosity component having a refractive index, before curing, of at least 1.56 at 25° C., and a viscosity, before curing, of at least 15,000 cP at 25° C., and a photoinitiator. The adhesive composition has a refractive index, after curing, of greater than 1.50. In one aspect, the adhesive composition is curable by ultraviolet radiation.
  • The high index-high viscosity component may be an aromatic urethane acrylate (e.g., brominated aromatic urethane acrylate), tribromophenyl acrylate, or 9,9-bis{4-(2-acryloyloxyethoxy)phenyl}fluorene.
  • The photoinitiator may include a radical photoinitiator, a cationic photoinitiator, or an anionic photoinitiator.
  • The radical photoinitiator may be selected from the non-limiting group of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, bis(2,6-dimethoxybezoyl)-2,4,4-trimethylpentyl phosphe-ine oxide, 2,4,6-trimethylbezoyldiphenylphosphine, 2,2-dimethoxy-2-phenylacetophenone, 4-(2-hydroxyethoxy)phenyl-(2-hydroxy-2-methlpropyl)ketone, 2-methyl thioxanthone, 2-isopropyl thioxanthone, 2-chloro thioxanthone, thoxanthone, xanthene, bezophenoe, 2-methyl-1-[4-methylthio)phenyl]-2-morpholino propan-1-one, and 2-benzyl-2-N,N-dimethlamino-1-(-morpholinophenyl)-1-butanone. Preferably, the radical photoinitiator is at least one of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, or 2-hydroxy-2-methyl-1-phenyl-propan-1-one.
  • The cationic photoinitiator may be selected from the non-limiting group of triaryl sulfonium salt hexafluoroantimonate, triaryl sulfonium hexafluorophosphate, bis(4-diphenylsulfomo)-phenyl]sufide-bis-hexafluorophosphate, di(alkylphenyl)iodonium salt, diaryl iodonium hexafluroantimonate, and iron-arene complex.
  • The anionic pbotoinitiator may be selected from the non-limiting group of O-nitrobenzyl derivatives, metal amine complexes, (cyclopentadienyl)ruthenium complexes, and (cyclopentadienyl)osmium complexes.
  • In another embodiment, the photoinitiator comprises at least one additive, such as a co-catalyst, a phosphine, and/or an amine. The additive can be phosphonium salts, tera alkylphosphonium bromide, tera alkylphosphonium chloride, triphenyl phosphine, trimethoxy phenyl phosphine, trichloro phenyl phosphine, alkyl amine primary, dialkyl amine, or trialkyamine.
  • In one embodiment, the composition includes at least one vinyl resin (e.g., NTT #6205).
  • In another embodiment, the composition contains at least one sulfur component, including, without limitation, 2-bis(2-mercapto ethylthio)-3-mercapto propane, trimethylolpropane tris(3-mercaptopropionate), 2-mercaptoethylthio-3-propanthiol sulfide, pentaerythritol tetrakis(2-mercaptopropoinate), 2,2′-thiodiethanethiol, trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 4,5-(mercaptomethylthio)-1,3-dithiolane, 4,6-(mercaptomethylthio)-1,3-dithiane, 1,1,3,3-tetra(mercaptomethylthio)propane, 2,3-episulfide propanyl disulfide, and 2,3-episulfide propanyl sulfide.
  • In another embodiment, the composition contains at least one acrylic component, including, without limitation, polyethylene glycol o-phenyl phenyl ether acrylate, urethane acrylate, aliphatic urethane acrylate, acrylic oligomer, 2(2-ethoxyethoxy)ethyl acrylate, 2-phenoxyethyl acrylate, ethoxylated (4) trimethylolpropane triacrylate, ethoxylated (6)trimethylolpropane triacrylate, isobornyl acrylates, glycidyl methacrylate, 1,6 hexanediol diacrylate, alkoxylated phenol acrylate, alkoxylated phenol diacrylate, 2 hydroxyethyl acrylate, phenylthioethylacrylate, alkoxylated nonylphenol acrylate, ethoxlyated tribromo phenyl acrylate, tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, and polyethylene glycol (200) diacrylate. In one embodiment, the composition contains urethane acrylate.
  • In another embodiment, the composition contains a bisphenol A, including, without limitation, ethoxylated (10) bisphenol A diacrylate, ethoxylated (4) bisphenol A diacrylate, ethoxylated (4) bisphenol A dimethacrylate, diallylether bisphenol A, and ortho diallyl bisphenol A.
  • In another embodiment, the composition contains at least one naphthalene component including, without limitation, 1-chloro naphthalene, 1-bromo naphthalene, and 1-naphthaldehyde.
  • In another embodiment, the composition contains at least one epoxy resin including, without limitation, poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide and epoxy acrylates.
  • In one embodiment, the adhesive composition has a refractive index, after curing, of about 1.60 to about 1.74. These compositions can contain about 0.01 wt % to about 5 wt % of at least one photoinitiator and about 1 wt % to about 70 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylate; tribromophenyl aery late; and 9,9-bis{4-(2-acryloyloxyethoxy)phenyl}fluorene. The photoinitiator may include one or more of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, triaryl sulfonium salt hexafluoroantimonate, and triaryl sulfonium hexafluorophosphate. The adhesive composition may also contain about 10 wt % to about 95 wt % of at least one vinyl resin.
  • These adhesive compositions may also contain about 2 wt % to about 50 wt % of at least one acrylic component selected from the group consisting of polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; acrylic oligomer; isobornyl acrylates; phenylthioethylacrylate; and ethoxlyated tribromo phenyl acrylate.
  • These adhesive compositions may also contain at least one sulfur component selected from the non-limiting group consisting of 1,2-bis(2-mercapto ethylthio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); 2,2′-thiodiethanethiol; trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide; 2,5-dimercaptomethyl-1,4-dithiane; 4,5-(mercaptomethylthio)-1,3-dithiolane; 4,6-(mercaptomethylthio)-1,3-dithiane; 1,1,3,3-tetra(mercaptomethylthio)propane; 2,3-episulfide propanyl disulfide; and 2,3-episulfide propanyl sulfide. Preferably, the composition comprises about 1 wt % to about 30 wt % of at least one sulfur component selected from the group consisting of 1,2-bis(2-mercapto ethyltbio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); and 2,2′-thiodiethanethiol.
  • These adhesive compositions may also contain about 5 wt % to about 25 wt % of at least one at least one naphthalene component selected from the group consisting of 1-chloro naphthalene; 1-bromo naphthalene; and 1-naphthaldehyde.
  • These adhesive compositions may also contain a bisphenol A component selected from the group consisting of diallylether bisphenol A and ortho diallyl bisphenol A.
  • These adhesive compositions may also contain an epoxy resin selected from the group consisting of poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide; and epoxy acrylates.
  • In another embodiment, the adhesive composition has a refractive index, after curing, of about 1.55 to about 1.60. These compositions can contain about 0.01 wt % to about 5 wt % of at least one photo initiator; about 10 wt % to about 60 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; tribromo phenyl aery late; and 9,9-bis{4-(2-acryioyioxyethoxy)phenyl}fluorine; and about 1 wt % to about 60 wt % of at least one acrylic component selected from the group consisting of 2(2-ethoxyethoxy) thyl acrylate; 2-phenoxyethyl aery late; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; alkoxylated phenol acrylate; 2 hydroxyethyl acrylate; polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; isobornyl acrylates; and alkoxylated nonylphenol acrylate.
  • In one embodiment, these adhesive compositions can contain about 0.01 wt % to about 5 wt % of at least one photoinitiator selected from the group consisting of bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide; 1-hydroxcyclohexylphenylketone; and 2-hydroxy-2-methyl-1-phenyl-propan-1-one; about 10 wt % to about 60 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; and about 1 wt % to about 60 wt % of at least one acrylic component selected from the group consisting of 2(2-ethoxyethoxy) ethyl acrylate; 2-phenoxyethyl acrylate; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; alkoxylated phenol acrylate; and 2 hydroxyethyl acrylate.
  • These adhesive compositions may also contain a sulfur component selected from the group consisting of 2-mercaptoethylthio-3-propanthiol sulfide; 2,2′-thiodiethanethiol; and trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide.
  • These adhesive compositions may also contain an epoxy resin (e.g., epoxy acrylates).
  • These adhesive compositions may also contain a bisphenol A component selected from the group consisting of ethoxylated (10) bisphenol A diacrylate; ethoxylated (4) bisphenol A diacrylate; and ethoxylated (4) bisphenol A dimethacrylate.
  • These adhesive compositions may also contain triallyl isocyanurate.
  • In a yet another embodiment, the adhesive composition has a refractive index, after curing, of about 1.49 to about 1.55. These adhesive compositions can contain about 0.01 wt % to about 5 wt % of at least one pbotoinitiator; and about 5 wt % to about 80 wt % of at least one acrylic component selected from the group consisting of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimetbyiolpropane triacrylate; ethoxylated (6) trimetbyiolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; alkoxylated phenol diacrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; ethoxylated (10) bisphenol A diacrylate; 2-phenoxyethyl acrylate; isobornyl acrylates; tetrahydrofurfuryl acrylate; tetrahydrofurfuryl methacrylate; and polyethylene glycol (200) diacrylate.
  • In one embodiment of these adhesive compositions, the acrylic component is selected from the non-limiting group of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; and ethoxylated (10) bisphenol A diacrylate.
  • These adhesive compositions may also contain about 10 wt % to about 50 wt % of at least one high index-high viscosity component (e.g., brominated aromatic urethane acrylates).
  • These adhesive compositions may also contain a sulfur component selected from the group consisting of trimethylolpropane tris(3-mercaptopropionate) and pentaerythritol tetrakis(2-mercaptopropoinate).
  • In another embodiment, a device is provided. The device comprises a first and second substrate, e.g., ophthalmic component, and a curable adhesive composition (as described in any of the embodiments) disposed between the first and second ophthalmic components. The refractive index of the adhesive composition, after curing, is i) about equal to the refractive index of at least one of the first ophthalmic component and the second ophthalmic component, ii) between the refractive index of the first lens and the refractive index of the second lens, or iii) about equal to the average refractive index of the first ophthalmic component and the second ophthalmic component. In one embodiment, the refractive index of the adhesive composition, after curing, is within 0.03 of the refractive index of at least one of the first ophthalmic component and the second ophthalmic component. In another embodiment, at least one of the first ophthalmic component and the second ophthalmic component has a refractive index of about 1.67.
  • Additional features, advantages, and embodiments of the invention may be set forth or apparent from the following detailed description and claims. Moreover, both the foregoing summary of the invention and the following detailed description are exemplary and intended to provide further explanation without limiting the scope of the invention as claimed.
  • DETAILED DESCRIPTION OF THE INVENTION
  • In one embodiment, curable adhesive compositions are provided that exhibit a high refractive index, acceptable viscosity, and/or acceptable adhesion. Devices are also provided that include the adhesive composition disposed between two substrates.
  • An exemplary assembly process for fabricating electro-active lenses is described in U.S. Publication 2009/0256977, which is hereby incorporated by reference in its entirety. A portion of the assembly process can include two preformed plastic lenses, one of which has a lens surface comprising a diffractive pattern filled with electro-active material (i.e., liquid crystal), that are subsequently bonded together. Because of the diffractive pattern, the laminate surfaces can generate a thin cavity (e.g., in the range of 30-70 microns thick). The thickness of this cavity can depend on the diffractive design.
  • Refractive Index
  • The cavity formed between the lens substrates can be filled with a UV curable adhesive composition having a refractive index (RI) that matches the RI of the preformed lenses to hide the seal features. If the two preformed lenses have different RIs, the value of RI of the adhesive composition can be between (e.g., an average of) the two RIs of the preformed lenses) to reduce or eliminate light interference due to the difference in RI of the two preformed lenses. For example, when adhering a polycarbonate lens (RI 1.58) to a Trivex® lens (RI 1.53), a suitable adhesive composition can have an RI, after curing, of about 1.55. The compositions may be suitable for adhering a wide variety of lens materials, including electro-active lenses and composite lenses. In some embodiments, the adhesives are particularly suitable for use with plastic materials having an RI of about 1.67 or higher. The adhesives may be used to laminate one or more of the following substrate materials: polycarbonate (RI 1.58), Trivex® (RI 1.53), and MR-10 (RI 1.67). The laminated substrates may be the same as, or different from, one another.
  • Unless otherwise specified, the refractive index of the adhesive composition is reported after curing at 25° C., (Curing increases the RI of the adhesive composition by about 0.01-0.05, more specifically about 0.03.) In contrast, unless otherwise specified, the RI of the individual components of the adhesive are reported before curing at 25° C.
  • The adhesive compositions provided herein have a refractive index of at least 1.49, preferably at least 1.50, 1.53, 1.55, 1.56, 1.57, 1.60, 1.63, 1.65, 1.67, or 1.70. The adhesive compositions described herein are categorized as high index, mid-index, and low index adhesives (see Examples), but such distinctions are used merely to categorize the compositions relative to one another. All of the compositions described herein, including the “low” and “mid” index examples, have a refractive index that is higher than most typical adhesives. The low index adhesives described herein have a refractive index of about 1.49 to about 1.55. The mid-index adhesives have a refractive index of about 1.55 to about 1.6. The high index adhesives have a refractive index of about 1.6 to about 1.74.
  • Viscosity
  • Viscosity of an adhesive composition is an important parameter that affects manufacturing. Viscosity is not a predictable feature of a composition; it can not be calculated strictly by weight average. For example, although adding a low viscosity component to a composition will dilute the viscosity of the composition, the precise reduction in viscosity cannot be predicted based on the amount, e.g, percent weight, and viscosity of the individual component added. Accordingly, achieving an acceptable viscosity of the adhesive composition requires an understanding of the manufacturing process to be employed as well as the balancing of the various adhesive components as taught herein.
  • Accordingly, the curable adhesive can have a predetermined or desired viscosity value to flush away the excess liquid crystal that may overflow into the cavity during the assembly process. As an example, compositions with viscosity of about 100 cP or less may break the diffractive seal during the filling process and consequently could contaminate the electro-active material inside the diffractive pattern. But low viscosity adhesive compositions may be suitable to laminate two preformed lenses that do not comprise diffractive patterns. Preferably, the viscosity of the adhesive composition, before curing, is about 200 to about 5000 cP, about 1000to about 3000 cP, or about 1000 to about 2000 cP.
  • The adhesive compositions provided herein can also be used in surface casting, which includes applying the adhesive composition to one preformed lens and then casting another lens on the top of the original preformed lens.
  • Adhesion
  • Adhesion performance is also a high priority. For a strong, durable bond, the adhesive compositions can be designed to avoid frozen-in stresses and voids, which can be caused by adhesive shrinkage. In general, the lower the shrinkage rate, the better the adhesion. To reduce shrinkage rate, the adhesive can comprise monomers with a lower number of reactive functional groups, or they can comprise high molecular weight oligomers or pre-polymers. It is desired for the adhesive composition to be able to wet and spread on a substrate surface. This molecular- level contact allows the forces of adhesion to develop, removes entrapped air from the interface, and maximize the area over which bond can develop. For a clean, smooth substrate, wetting and spreading is governed by the surface tensions of the two materials. The lower the surface tension of the adhesive, the better the wetting. Aside from surface tension, surface preparation, especially of plastic substrates, is an important step to improve adhesion performance. Methods such as chemical etching and plasma can be used to improve the adhesion performance of the adhesive compositions. Another efficient method to improve adhesion performance of the adhesive compositions is to treat the surface with functionalized alkoxysilanes, such as acryloxy trimethoxy silane.
  • The adhesive compositions described herein can be formed as blends of reactive monomers, oligomers or pre-polymers, photoinitiator(s), and optional silane coupling agent. In particular, the adhesive compositions can contain a high index-high viscosity component and a pbotoinitiator.
  • Reactive Monomers, Oligomers, and Pre-polymers
  • In one embodiment, the curable adhesive composition contains at least one high index-high viscosity component having a refractive index, before curing, of at least 1,56 at 25° C., and a viscosity, before curing, of at least 15,000 cP at 25° C. In one embodiment, the high index-high viscosity component has a refractive index of at least about 1.58, 1.60, or 1.62. In one embodiment, the high index-high viscosity component has a viscosity of at least about 20,000, 40,000, 60,000, 70,000, 80,000, or 90,000 cP at 25° C. Exemplary high index-high viscosity components include, but are not limited to, aromatic urethane acrylate (e.g., brominated aromatic urethane acrylate), tribromophenyl acrylate, or 9,9-bis{4-(2-acryloyloxyethoxy)phenyl}fluorene. A high index-high viscosity component (or a combination of more than one high index-high viscosity components) can be present in an amount of about 1 to about 70%, about 10 to about 60%, about 10% to about 50%, about 10% to about 30%, or about 10% to about 20%.
  • The selection of the resin, in addition to good adhesion, can be made to establish mainly the refractive index match between the cured composition and the substrates. In the case of laminating two preformed lenses with one comprising a diffractive pattern, the RI match should be the same or very close, e.g., within 0.02, to hide the diffractive seal features. For example, when laminating two plastic lenses made of RI of 1.67 with a diffractive pattern, the RI of the adhesive composition can be about 1.64 to about 1.70. Even though some commercially available adhesives may exhibit a high RI, they often exhibit poor adhesion. For example, a formulation made of 100% composition #8323 or 100% composition of #6205 (supplied by NTT Advanced Technology Corp.), the adhesion performance is very poor, and furthermore, the adhesive broke the diffractive seal and contaminated the liquid crystal inside the diffractive region.
  • Resin blends were prepared that are suitable for use in laminating preformed high refractive lenses, such as lenses manufactured from MR-10 (RI=1.67). In one embodiment, an adhesive for bonding two MR-10 lenses contains:
  • 5-60% vinyl resin (NTT #6205),
  • 10-50% 9,9-Bis[-4-(2-acryloxyethoxy)phenyl]Fluorene (NKE A-BPEF supplied by Kowa American Corp.)
  • 10-50% Tribromophenyl acrylate (BR-30 supplied by Kowa)
  • 0-20% Aromatic monoacrylate oligomer (CN-131B supplied by Sartomer}
  • 0-30% of a sulfur component, and
  • 0.01-5% Phenyl bis(2,4,6-trimethyl benzoyl)phosphine oxide (Irgacure 819 supplied by Ciba).
  • Unless otherwise specified, component amounts, here and throughout the specification, are provided as weight percents of the total composition.
  • In this formulation, if the amount of NTT #6205 is less than 5%), the final RI of the adhesive composition may be too low, and there may be insufficient RI match to the MR-10preformed lenses. On the other hand, if the amount of NTT #6205 is higher than 60%, then the RI may be too high, and the adhesion performance becomes poor.
  • A sulfur component, e.g., a multifunctional thiol resin, provides the film with, in addition to high RI, desirable mechanical properties that improve adhesion. The exemplary resin blend described above suitable for laminating MR-10 lenses may include as the sulfur component:
  • 2-Mercaptoethylthio-3propane sulfide (supplied by Mitsui);
  • 1,2-Bis(2-mercaptoethyl)-3-mercaptopropane (supplied by Mitsui);
  • 2,5-dimercaptomethyl-1,4 dithiane (supplied by Sigma-Aldrich);
      • 2,2′-Thiodiethanthiol (supplied by Sigma-Aldrich);
  • Trimethylol propane tris3-mercaptopropoinate and/or 2, mercaptoethylthio 3-propanethiol sulfide; or
  • 2,5-dimercaptomethyl-1,4dithiane; Pentaerythritol tetrakis-3-mercaptopropoinate; and/or 2,3-mercapto propane.
  • Another exemplary composition includes: 20-60% composition #8323 (supplied by NTT), 10-50% CN-2600, 10-20% NKE-10, and 0.01-5% Irgacure 819
  • Other exemplary compositions include 30-60% vinyl resin (NTT #6205) and 0.01-5% Irgacure 819, as well as: 20-40% CN-2600, and 10-50% NK-A-BPEF (supplied by Kowa); or 30-65% Vinyl Naphthalene, 0-70% CN-2600, 0-50% 1,2-bis(2-mercapto ethyl thio)propane, and 0-70% NK-A-BPEF.
  • Yet other exemplary compositions include 0-40% vinyl resin (NTT #6205) and 0.01-5% Irgacure 819, as well as:
  • 10-50% 1,2-bis(2-mercapto ethyl thio)propane (supplied by Mitsui Chemical), 5-40% Chloro Naphthalene and/or Naphthaldehyde, 0-20% CN-2600, and 0-70 NK-A-BPEF;
  • 30-70% of 2,3-Episulfide propane sulfide (supplied by MGC), 30-70% CN-2600, 0-20% NK-A-BPEF, and 0-10% NKE-10; or
  • 0-40% 1,2-bis(2-mercapto ethyl thio)propane (supplied by Mitsui Chemical), 5-40% CN-2600, and 20-50% NK-A-BPEF-10.
  • Resin blends suitable for use in surface casting Trivex® to preformed MR-10 lenses can include 30-70% CN-2600 and 30-70% NK-10.
  • Resin blends suitable for use in surface casting Trivex® to preformed polycarbonate lenses can include 5-50% CN-2600, 5-15% Ethoxylated (6)trimethylolpropane triacrylate (SR 499), 20-50% Ethoxylated(4)bisphenol A diacrylate (SR601), 5-15% 2-Hydroxy ethyl acrylate, and 5-10%, Alkoxylated phenol acrylate (D9088).
  • Commercially available components that may be useful for preparing the curable adhesive compositions include, but are not limited to:
  • High refractive index resins #6205 , #8322 and #8323 (NTT Advanced Technology Corp.)
  • Polyethylene glycol 0-phenyl phenyl ether acrylate (NKE-10); 9,9 Bis[4-(2-acryloxyethoxy)phenyl fluorene (NK. A-BPEF); and tribromophenyl acrylate (Kowa American Corp.)
  • Brominated aromatic urethane acrylates oligomer (CN-2600) (Sartomer).
  • 1-vinyl Naphthalene, 2-vinyl Naphthalene, 1-chloro Naphthalene, and N-vinyl carbazole (Sigma-Aldrich).
  • Divinyl Benzene, 2,6-diphenyl-1,4-phenylene oxide, diphenyl methane bis(4-phenyl)carbamate, alpha-nephthyl methacrylate, alpha-naphthyl, carbonyl methacrylate, beta-naphthyl methacrylate, and styrene sulfide (Scientific Polymer Products, Inc.)
  • 2,3-Episulfide propane sulfide (supplied by MGC)
  • 2,3-Episulfide propane disulfide, 1,2-bis(2-mercaptoethylthio)-3mercaptopropane, and 2-mercaptoethyl sulfide (Mitsui Chemicals)
  • Acrylic oligomer (CN131B), Epoxy acrylate oligomer (CN110), Epoxy methacrylate (CN151), Ethoxylated (3)-bisphenol A diacrylate (SR349), Ethoxylated (2) bisphenol A dimethacrylate (SR348), Ethoxylated (4) bisphenol A diacrylate (SR601), 2-Phenoxyethyl acrylate (SR339), Alkoxylated phenol acrylate (D9088), Ethoxylated (2) bisphenol A dimethacrylate SR101, Ethoxylated (6) bispehenol A dimethacrylate (SR504), Alkoxylated phenol acrylate (SR614), Ethoxylated (6) trimethylolpropane triacrylate (SR499), Alkoxylated aliphatic diacrylate (SR9209), Polyethylene glycol(400)diacrylate (SR344), 1,6 Hexanediol diacrylate (SR239), Tetrahydrofurfuryl acrylate (SR285), Isobornyl Acrylat (SR506A), Tetrahydrofurfuryl methacrylate (SR203), and Ethoxylated (10) bisphenol A diacrylate (SR602) (Sartomer).
  • Photoinitiators
  • The photoinitiator absorbs light and is responsible for the production of free radicals in a free radical polymerized system or cations in a cationic photoinitiated system. There are many photoinitiators commercially available, and a suitable photoinitiator can be selected by considering the following factors:
  • 1) The types of base resin employed: Free radical polymerized resin or cationic polymerized resin.
  • 2) The radiation source: The absorption bands of the photoinitiators should generally substantially overlap the emission spectra of the light source.
  • 3) The absorption bands of the lens laminate: The adhesive can be used to bond two substrates, e.g., preformed transparent plastic lenses. One or both substrates may block UV block light (a common practice for eye protection from sunlight). In this case, the absorption band of the photointiator can be outside the absorption band of the substrates.
  • The photoinitiator concentration can be about 0.01 to about 10%, preferably about 0.01to about 5%, about 0.1 to about 3%, or about 0.1 to about 1.5%.
  • Preferred components of the photoinitiator system include one or more of: Phenyl bis(2,4,6-trimethyl benzoyl)phosphine oxide (Irgacure 819),
  • 1-Hydroxy cyclohexyl phenyl-ketone (Irgacure 184),
  • 2-Hydroxy 2-methyl 1-phenyl 1-propane (Daracure 1173),
  • Triaryl sulfonium salt hexafluoroantimonate and triaryl sulfonium hexafluorophosphate (Cyracure© UVI-6976).
  • The photoinitiator may include a radical photoinitiator, a cationic photoinitiator, or an anionic photoinitiator.
  • Radical photoinitiator include, but are not limited to, bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, bis(2,6-dimethoxybezoyl)-2,4,4-trimethylpentyl phosphe-ine oxide, 2,4,6-trimethylbezoyldiphenylphosphine, 2,2-dimethoxy-2-phenylacetophenone, 4-(2-hydroxyethoxy)phenyl-(2-hydroxy-2-methlpropyl)ketone, 2-methyl thioxanthone, 2-isopropyl thioxanthone, 2-chloro thioxanthone, thoxanthone, xanthene, bezophenoe, 2-methyl-1-[4-methylthio)phenyl]-2-morpholino propan-1-one, and 2-benzyl-2-N,N-dimethlamino-1-(-morpholinophenyl)-1-butanone. Preferred exemplary radical photoinitiators include bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, 1-hydroxcyclohexylphenylketone, and 2-hydroxy-2-methyl-1-1-phenyl-propan-1-one.
  • Cationic photoinitiators include, but are not limited to, triaryl sulfonium salt hexafluoroantimonate; triaryl sulfonium hexafluorophosphate, bis(4-diphenylsulfonio)-phenyl]sufid-bis-hexafluorophosphate, di(alkylphenyl) iodonium salt, diaryl iodonium hexafluroantimonate, and iron-arene complex.
  • Anionic photoinitiators include, but are not limited to, O-nitrobenzyl derivatives, metal amine complexes, (cyclopentadienyl)ruthenium complexes, and (cyclopentadienyl)osmium complexes.
  • In one embodiment, the photoinitiator system includes at least one additive such as a co-catalyst, a phosphine, and/or an amine. Exemplary additives include, but are not limited to, phosphonium salts, tera alkylphosphonium bromide, tera alkylphosphonium chloride, triphenyl phosphine, trimethoxy phenyl phosphine, trichloro phenyl phosphine, alkyl amine primary, dialkyl amine, and trialkyamine.
  • Additional Adhesive Components
  • The adhesive composition may further contain up to about 10% of a partially or fully hydrolyzed silane coupling agent as an adhesion promoter/coupling agent. Exemplary silanes include, but are not limited to, 3-Methacryloxypropyl trimethoxysilane, 3-Amino-propyl trimethoxysilane, and 3-Glycidoxypropyltrimethoxysilane.
  • The composition may contain at least one vinyl resin. Without being bound by theory, it is believed that the vinyl resin advantageously exhibits a lower viscosity to dilute the high index-high viscosity component while simultaneously improving adhesion. A preferred vinyl resin is NTT #6205. The vinyl resin(s) can be present in an amount of, e.g., about 10 to about 95%, about 20 to about 60%, or about 30 to about 40%.
  • The composition may contain at least one sulfur component. Without being bound by theory, it is thought that the sulfur component improves adhesion. Exemplary sulfur components include, but are not limited to, 2-bis(2-mercapto ethylthio)-3-mercapto propane, trimethylolpropane tris(3-mercaptopropionate), 2-mercaptoethylthio-3-propanthiol sulfide, pentaerythritol tetrakis(2-mercaptopropoinate), 2,2′-thiodiethanethiol, trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 4,5-(mercaptomethylthio)-1,3-dithiolane, 4,6-(mercaptomethylthio)-1,3-dithiane, 1,1,3,3-tetra(mercaptomethylthio)propane, 2,3-episulfide propanyl disulfide, and 2,3-episulfide propanyl sulfide. The sulfur components) can be present in an amount of, e.g., about 1 to about 30%, about 5 to about 20%, or about 5 to about 10%).
  • The composition may contain at least one acrylic component. Without being bound by theory, it is believed that the acrylic component improves adhesion. Moreover, some acrylic components may also advantageously contribute to the high refractive index of the final composition. For example, aromatic acrylates, and particularly halogenated aromatic acrylates exhibit high RI. Exemplary acrylic components include, but are not limited to, polyethylene glycol o-phenyl phenyl ether acrylate, urethane acrylate, aliphatic urethane acrylate, acrylic oligomer, 2(2-ethoxyethoxy) ethyl acrylate, 2-phenoxyethyl acrylate, ethoxylated (4) trimethylolpropane triacrylate, ethoxylated (6) trimethylolpropane triacrylate, isobornyl acrylates, glycidyl methacrylate, 1,6 hexanediol diacrylate, alkoxylated phenol acrylate, alkoxylated phenol diacrylate, 2 hydroxyethyl acrylate, phenylthioethylacrylate, alkoxylated nonylphenol acrylate, ethoxlyated tribromo phenyl acrylate, tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, and polyethylene glycol (200) diacrylate. In one embodiment, the acrylic component includes a urethane acrylate. The acrylic component(s) can be present in an amount of, e.g., about 5 to about 80%, about 1 to about 60%, or about 2 to about 50%, about 5to about 30%.
  • The composition may contain a bisphenol A Without being bound by theory, it is believed that the bisphenol A improves the mechanical properties of the adhesive composition by, e.g., preventing film breakdown. Exemplary bisphenol A components include, but are not limited to, ethoxylated (10) bisphenol A diacrylate, ethoxylated (4) bisphenol A diacrylate, ethoxylated (4) bisphenol A dimethacrylate, diallylether bisphenol A, and ortho diallyl bisphenol A. The bisphenol component(s) can be present in an amount of, e.g., about 1 to about 70%, about 5 to about 25%, or about 30 to about 60%.
  • The composition may contain at least one naphthalene component. Without being bound by theory, it is believed that the naphthalene component exhibits a relatively high refractive index (though not typically as high as the high index-high viscosity component) while exhibiting a lower viscosity to balance the high index-high viscosity component. Exemplary naphthalene components include, but are not limited to, 1-chloro naphthalene, 1-bromo naphthalene, and 1-naphthaldehyde. The naphthalene components) can be present in an amount of, e.g., about 5 to about 25%o or about 10% to about 2%.
  • The composition may contain at least one epoxy resin. Exemplary epoxy resins include, but are not limited to, poly[(phenyl glycidyl ether)-co-formaldehyd]oligomeric epoxide and epoxy acrylates.
  • In some cases, particular components may be preferred depending on the desired refractive index outcome. To that end, preferred components for the low, mid-, and high index adhesives are provided. Numerous low, mid-, and high index adhesive compositions are also provided in the Examples.
  • The low index adhesives provided herein (RI of about 1.49 to about 1.55) generally comprise at least one acrylic component in addition to the photoinitiator and high index-high viscosity component. Preferred components include:
  • about 0.01 wt % to about 5 wt % of at least one photoinitiator; and
  • about 5 wt % to about 80 wt % of at least one acrylic component selected from the group consisting of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; alkoxylated phenol diacrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; ethoxylated (10) bisphenol A diacrylate; 2-phenoxyethyl acrylate; isobornyl acrylates; tetrahydrofurfuryl acrylate; tetrahydrofurfuryl methacrylate; and polyethylene glycol (200) diacrylate; more particularly
  • at least one acrylic component selected from the group consisting of aliphatic urethane acrylate; acrylic oligomer; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; glycidyl methacrylate; 1,6 hexanediol diacrylate; alkoxylated phenol acrylate; 2 hydroxyethyl acrylate; alkoxylated nonylphenol acrylate; and ethoxylated (10) bisphenol A diacrylate.
  • Additional preferred components for the low index adhesives include:
  • about 10 wt % to about 50 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; and/or
  • a sulfur component selected from the group consisting of trimethylolpropane tris(3-mercaptopropionate) and pentaerythritol tetrakis(2-mercaptopropoinate)
  • The mid-index adhesives provided herein (RI of about 1.55 to about 1.6) generally comprise at least one of an acrylic component in addition to the photoinitiator and high index-high viscosity component. Preferred components include:
  • about 0.01 wt % to about 5 wt % of at least one photoinitiator; more particularly
  • about 0,01 wt % to about 5 wt % of at least one radical photoinitiator selected from the group consisting of bis(2,3,6-trimethlbenzoyl)-phenylphosphirieoxide; 1-hydroxcyclohexylphenylketone; and 2-hydroxy-2-methyl-l -phenyl-propan-1-one;
  • about 10 wt % to about 60 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates; tribromo phenyl acrylate; and 9,9-bis{4-(2-acryloyloxyethoxy)phenyl}fluorine; more particularly
  • about 10 wt % to about 60 wt % of at least one high index-high viscosity component selected from the group consisting of brominated aromatic urethane acrylates;
  • about 1 wt % to about 60 wt % of at least one acrylic component selected from the group consisting of 2(2-ethoxyethoxy)ethyl acrylate; 2-phenoxyethyl acrylate; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; alkoxylated phenol acrylate; 2 hydroxyethyl acrylate; polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; isobornyl acrylates; and alkoxylated nonylphenol acrylate; more particularly about 1 wt % to about 60 wt % of at least one acrylic component selected from the group consisting of 2(2-ethoxyethoxy)ethyl acrylate; 2-phenoxyethyl acrylate; ethoxylated (4) trimethylolpropane triacrylate; ethoxylated (6) trimethylolpropane triacrylate; alkoxylated phenol acrylate; and 2 hydroxyethyl acrylate.
  • Additional preferred components for the mid-index adhesives include:
  • a sulfur component selected from the group consisting of 2-mercaptoethylthio-3-propanthiol sulfide; 2,2′-thiodiethanethiol; and trimethyloltris(3-mercaptopropoinate)oethylthio-3propanthiol sulfide;
  • an epoxy resin selected from the group consisting of epoxy acrylates;
  • a bisphenol A component selected from the group consisting of ethoxylated (10) bisphenol A diacrylate; ethoxylatedH (4) bisphenol A diacrylate; and ethoxylatedH (4) bisphenol A dimethacrylate; and/or
  • triallyl isocyanurate.
  • The high index adhesives provided herein (RI of about 1.6 to about 1.74) generally comprise a photoinitiator and high index-high viscosity component. Preferred components include:
  • about 0,01 wt % to about 5 wt % of at least one photoinitiator (e.g., bis(2,3,6-trimethlbenzoyl)-phenylphosphineoxide, triaryl sulfonium salt hexafluoroantimonate, and/or triaryl sulfonium hexafluorophosphate); and
  • about 1 wt % to about 70 wt % of at least one high index-high viscosity component selected from the group consisting of brom.in.ated aromatic urethane acrylate; tribromophenyl acrylate; and 9,9-bis{4-(2-acryloyloxyethoxy)phenyl}fluorine.
  • In one embodiment, the high index adhesive includes at least one vinyl resin (e.g., NTT #6205). The vinyl resin may be present in an amount of, e.g., about 10 wt % to about 95 wt %.
  • Additional preferred components for the high index adhesives include:
  • about 2 wt % to about 50 wt % of at least one acrylic component selected from the group consisting of polyethylene glycol o-phenyl phenyl ether acrylate; urethane acrylate; acrylic oligomer; isobornyl acrylates; phenylthioethylacrylate; and ethoxlyated tribromo phenyl acrylate;
  • at least one sulfur component selected from the group consisting of 1,2-bis(2-mercaptoethylthio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); 2,2′-thiodiethanethiol; trimethyloltris(3-mercaptopropoinate)oethylthio-3 propanthiol sulfide; 2,5-dimercaptomethyl-1,4-dithiane; 4,5-(mercaptomethylthio)-1,3-dithiolane; 4,6-(mercaptomethylthio)-1,3-dithiane; 1,1,3,3-tetra(mercaptomethylthio)propane; 2,3-episulfide propanyl disulfide; and 2,3-episulfide propanyl sulfide, more particularly
  • about 1 wt % to about 30 wt % of at least one sulfur component selected from the group consisting of 1,2-bis(2-mercapto ethylthio)-3-mercapto propane; trimethylolpropane tris(3-mercaptopropionate); 2-mercaptoethylthio-3-propanthiol sulfide; pentaerythritol tetrakis(2-mercaptopropoinate); and 2,2′-thiodiethanethiol;
  • about 5 wt % to about 25 wt % of at least one at least one naphthalene component selected from the group consisting of 1-chloro naphthalene; 1-bromo naphthalene; and 1-naphthaldehyde;
  • a bisphenol A component selected from the group consisting of diallylether bisphenol A; and ortho diallyl bisphenol A; and/or
  • an epoxy resin selected from the group consisting of poly[(phenyl glycidyl ether)-co-formaldehyde]oligomeric epoxide; and epoxy acrylates.
  • Light Source
  • The adhesive compositions are curable by exposure to radiation (a light source), preferably ultraviolet or ultraviolet-visible light. Curing can be conducted after the lamination process, which means the light passes through the lens assembly to reach the adhesive. In cases where the lens assembly includes a UV blocker, the light source can provide emission bands of wavelengths longer than 400 nm such as Actinic light sources or LED light sources.
  • The exposure time required to cure the adhesive compositions can vary and can depend on the light source, photoinitiator concentration, and the distance of the source from the substrate. One of ordinary skill in the art would readily appreciate how to adapt the exposure time accordingly.
  • Exemplary light sources include, but are not limited to:
  • Medium Pressure Vapor Lamp Source: Six-inch lamp operating at a power level of approximately 200 watt per inch. The curing chamber can include a conveyer transporting the sample underneath the lamp. The plane of the conveyer can be positioned approximately 3 inches from the lamp. The light energy can be set at approximately 1000 mJ/cm2 measured with Model ILT 390 Light Bug from International Light, Inc. over the range of 250 to 400 nm in one pass;
  • Actinic Light Source: Two sets of four fluorescent lamps can be positioned above and below to provide substantially uniform radiation over the plane of the curing stage. Approximately 4.9 mW/cm2 measured at the plane of sample from the top lamps and approximately 4.1 mW/cm2 from the bottom lamps with International light meter model IL1400A with XRL 140A detector. These lamps emit activating light in the range of greater than about 380 nm and are commercially available from Philips Electronics as model TLD-15W/03;
  • LED sources, such as a custom LED array with a main wavelength at 411±4 nm;
  • DYMAX Blue Wave™ 50 UV Spot Light with the UV main output of about 3000± mW/cm2 at 365 nm, 410 nm, and at 430nm.
  • Devices
  • As previously mentioned, the adhesive compositions provided herein can be used to bond substrates, e.g., ophthalmic components. The adhesive can be applied in a number of ways readily apparent to one of ordinary skill, in the art including, but not limited to, spinning, dipping, brushing, spraying, and filling.
  • The substrates to be laminated can be the same as or different from one another. In one embodiment, the adhesive is disposed between two substrates, each, with a different RI. For example, adhesive compositions were found to adhere surface casting Trivex® (RI=1.53) resin to a preformed polycarbonate lens (RI=1.58), or surface casting Trivex® to a preformed MR-10lens (RI=1.67). When the substrates have different RIs, the RI of the cured adhesive composition can have a RI value close to the average RI of the two lenses. For example, when laminating preformed Trivex® lens or surface casting Trivex® resin to a preformed polycarbonate lens (RI=1.58), the RI of the cured adhesive composition should be in the range of about 1.54 to about 1.57, and preferably about 1.55 to about 1.56. The advantage of having an adhesive RI close to the RI of both lenses is to reduce or eliminate light interference resulting from the difference in RI of the two lenses.
  • Accordingly, in another embodiment, a device is provided. The device comprises a) a first substrate, e.g., ophthalmic component, b) a second substrate, e.g., ophthalmic component, and c) a curable adhesive composition disposed between the first and second ophthalmic components. The adhesive can be any of the adhesives described herein, such as those comprising at least one high index-high viscosity component having a refractive index, before curing, of at least 1.56 at 25° C., and a viscosity, before curing, of at least 15,000 cP at 25° C., and a photoinitiator. The refractive index of the adhesive composition, after curing, is i) about equal to the refractive index of at least one of the first ophthalmic component and the second ophthalmic component, ii) between the refractive index of the first lens and the refractive index of the second lens, or iii) about equal to the average refractive index of the first ophthalmic component and the second ophthalmic component. In one embodiment, the refractive index of the adhesive composition, after curing, is within 0.03, preferably within 0.02, of the refractive index of at least one of the first ophthalmic component and the second ophthalmic component. In another embodiment, at least one of the first ophthalmic component and the second ophthalmic component has a refractive index of about 1.67.
  • EXAMPLES Mixing the Components:
  • The amount of the solid photoinitiator to be used can be taken from pre-dissolved concentrated form in the range of 3-6% by weight. High viscosity and/or non-pourable components can be preheated and mixed with others. Solid monomers or oligomers can also be preheated and mixed with a low viscosity component before adding a predetermined amount of initiator. The final composition can be mixed for at least 10 to 15 minutes away from light before storing it in a brown polypropylene bottle at regular room temperature conditions.
  • Sample Preparation
  • The components that form the light curable adhesive were used as received. Exemplary components are listed in the Tables below.
  • Assembly and Curing: About 0.5 g of the adhesive is placed on a first substrate, e.g., a pre-cleaned round, flat piece of uncoated MR-10 having a diameter of about 44 mm and a thickness of about 1.2 mm (supplied by PixelOptics, Inc.). A second substrate, e.g., the same as the first, is placed with a gentle contact to the adhesive on top the first piece until the adhesive spreads to the edge of the substrates. The assembly then proceeds to the curing step, e.g., it is placed on an actinic light source curing stage. The curing stage is about 5mm thick round clear crown glass and is about 80 mm in diameter. The assembly is exposed to the light from the top and bottom for 1.5 min. The cured assembly is examined and left at room temperature for at least 10 min before the adhesion test.
  • Refractive Index Measurement: Abbe-3L Refractometer from Fisher Scientific was used to measure the refractive index of the adhesives in liquid state (before curing) or solid cured state. This Refractometer has an index range from 1.30 to 1.71 relative to Sodium D line (589.3nm), 1-bromonaphthalene from Fisher Scientific was used as contact liquid for solid test pieces with indices less 1.64 nD, and Series M 1.75 nD from Cargill was used as contact liquid for solid test pieces with indices more than 1.64 nD.
  • Adhesion Strength: The adhesion strength was evaluated based on how much effort was needed to separate the two glued pieces. A hand-held, mold scraper tool commercially available under parts code TTAR 05-020 for the handle and TTAR 05-021 for the de-molding blade from Optical Dynamics was used to separate the two glued pieces and assign poor, good or excellent adhesion ratings as follows:
  • Poor: Easy to de laminate from both sample pieces by hand without using the scraper tool.
  • Good: The two sample pieces were difficult to delaminate using a razor blade.
  • Excellent: The two sample pieces do not delaminate using the scraper tool unless excessive force is applied. For this case, separation was associated with broken portions, with, the cured adhesive randomly remaining on the separate pieces of the test sample.
  • The adhesive compositions that exhibited good RI match and good adhesion in the initial screening tests were further tested for adhesion performance and RI match in actual lens laminates to form composite lens. The adhesion performance was tested by surfacing and edging of the final lens laminate looking for any sign of delamination. All preferred adhesive compositions show good RI match and good or excellent adhesion.
  • The invention can be further illustrated by referring to the following adhesive compositions in the Tables below. (RI=refractive index; visc.=viscosity; comp.=composition)
  • TABLE I
    Exemplary Components
    RI visc Chemical Name Proprietary Name
    Phenyl bis(2,4,6-trimethyl benzoyl) phosphine oxide Irgacure 819
    1-Hydroxy cyclohexyl phenyl-ketone Irgacure 184
    2-Hydroxy 2-methyl 1-phenyl 1-propane Darocur 1173
    1.579; 164000; Brominated Aromatic Urethane Acrylates CN2600
    1.58 72000
    1.6 solid Tribromophenyl Acrylate BR30
    1.621 91000 9,9-Bis{4-(2-acryloyloxyethoxy)phenyl}fluorene NK-BPEF
    at 60 C.
    1.68 18 vinyl resin NTT #6205
    Epoxy oligomer EP45HT
    1.576 150 polyethylene glycol o-phenyl phenyl ether acrylate NK-Ester A-Len-10
    1.55 56000 Urethane acrylate CN9167
    Aliphatic urethane acrylate CN2922
    1.5255 250 acrylic oligomer CN 131B
    1.4366 6 2(2-ethoxyethoxy) ethyl acrylate SR 256
    1.516 12 2-phenoxyethyl acrylate SR 339
    1.534 1080 ethoxylated (4) trimethylolpropane triacrylate SR 601
    ethoxylated (4) bisphenol diacrylate
    1.4691 95 ethoxylated (6) trimethylolpropane triacrylate SR 499
    1.47 9 Isobornyl acrylates SR 506
    Glycidyl methacrylate SR 379
    1.456 <10 1,6 hexanediol diacrylate SR 238
    1.495* 65 alkoxylated phenol acrylate CD 9088
    1.449 5 2 hydroxyethyl acrylate 2-HEA
    1.555 <10 Phenylthioethylacrylate PTEA
    Alkoxylated nonylphenol acrylate 614
    Glycidyl methacrylate SR 379
    ethoxylated (10) bisphenol diacrylate SR 602
    Ortho diallyl bisphenol A
    Diallylether bisphenol A
    1.633 70 1,2-bis(2-mercapto ethylthio)-3-mercapto propane
    1.523; 67; 190 Trimethylolpropane tris(3-mercaptopropionate)
    1.517
    1.64 250 2-mercaptoethylthio-3-propanthiol sulfide
    1.53 250 Pentaerythritol tetrakis(3-mercaptopropionate)
    1.59 <10 2,2′-Thiodiethanethiol
    1.631 <10 1-Chloro Naphthalene
    1.656 <10 1-Bromo Naphthalene
    1.6515 <10 1-Naphthaldehyde
    1-Naphthylamine
    1-Naphthol
    For the exemplary components, RI and viscosity were measured at 25° C., except where noted by *, which were provided at the closest temperature available. The RI of the compositions before and after curing was measured at 23° C.
  • TABLE II
    Exemplary High Index Adhesive Compositions
    H1 H2 H3 H4 H5 H6 H7 H8
    Irgacure 819 0.41 0.41 0.316 0.276 0.295 0.193 0.18 0.15
    CN2600 21.74 14.32 16.06 3.98 9.6 2.78 2.65
    BR30 24.17
    NK-Ester A-BPEF 36.32 58.58 48.23 41 39 24.16
    NTT #6205 60 59.9 47.3 37.16 41.88 26.33 24.74 16.67
    NK-Ester A-Len-10 17.85 25.27
    CN 131B 9.55
    1,2-bis(2-mereapto 30 23.39 25.3
    ethylithio)-3-mereapto
    propane
    1-Chloro Naphthalene 10.04
    Trimethylolpropane
    tris(3-
    mercaptopropionate)
    Composition 1.64 1.64 1.64 1.64 1.64 1.64 1.64 1.62
    RI (pre-cure)
    Composition 1.674 1.67 1.669 1.663 1.669 1.676 1.672 1.660
    RI (cured)
    H9 H10 H11 H12
    Irgaeure 819 0.15 0.17 0.15 0.15
    CN2600 57.69 38.01
    BR30 20.91 36.12
    NK-Ester A-BPEF 20.91 19.54
    NTT #6205 23.63 14.58
    NK-Ester A-Len-10 2.6 42.16 61.84
    CN 131B 8.91
    1,2-bis(2-mereapto 25.49 16.2
    ethylithio)-3-mereapto
    propane
    1-Chloro Naphthalene
    Trimethylolpropane 10.8
    tris(3-
    mercaptopropionate)
    Composition 1.6303 1.6173 1.5813 1.58
    RI (pre-cure)
    Composition 1.668 1.648 1.608 1.609
    RI (cured)
    H13 H14 H15 H16 H17 H18 H19 H20
    Irgacure 819 0.24 0.219 0.152 0.19 0.19 0.19 0.22 0.21
    Cyracure
    UVI6976
    CN2600 22.41 8
    BR30 15.6 15.78 15.68 15.83 15.33
    NK- BPEF 17.88 19.6 15.6 15.78 15.68 15.83 15.33 19.73
    NTT #6205 36.74 33.21 34.5 32.12 31.92 32.23 31.44 30.38
    EP45HT
    NK-Ester A-Len-10
    CN9167 9.02 9.837 9.837 21.2 21.07 21.29 23.6
    CN131B 5.89 4.45 4.48 5.26 3.94
    SR 506 3.14
    PTEA 6.58 6.118 6.118
    Diallylether
    bisphenol A
    Trimethylolpropane 8.22 14.507 7.52 8.46
    tris(3-
    mercaptopropionate)
    2- 12.34 17.59 5.67
    Mercaptoethylthio-
    3-propanthiol
    sulfide
    Pentaerythritol 10.45 2.95 3
    tetrakis(3-
    mercaptopropionate)
    H21 H22 H23 H24 H25 H26
    Irgacure 819 0.21 0.06 0.33 0.41 0.26
    Cyracure 1.03
    UVI6976
    CN2600 5.08 23.08 4.55 44.5
    BR30 13.9
    NK- BPEF 12.88 20.20 46.04
    NTT #6205 32.9 60 90
    EP45HT 98.97
    NK-Ester A-Len-10 16.86 5.12 6.44
    CN9167 21.67 11.49
    CN131B 3.44
    SR 506
    PTEA 17.40
    Diallylether 4.76
    bisphenol A
    Trimethylolpropane 6.04
    tris(3-
    mercaptopropionate)
    2- 4.03
    Mercaptoethylthio-
    3-propanthiol
    sulfide
    Pentaerythritol
    tetrakis(3-
    mercaptopropionate)
    H13 H14 H15 H16 H17 H18 H19 H20
    2,2′- 6.644 6.644 11 7.2 7.02
    Thiodiethanethiol
    1-Bromo 8.98 9.88
    Naphthalene
    1-Chloro
    Naphthalene
    1-
    Naphthaldehyde
    1-
    Naphthylamine 4.82
    1- Naphthol
    Composition 1.629 1.616 1.616 1.613 1.618 1.616 1.627 1.609
    RI (pre-
    cure)
    Composition 1.668 1.651 1.651 1.647 1.6505 1.647 1.657 1.638
    RI (cured)
    H21 H22 H23 H24 H25 H26
    2,2′-
    Thiodiethanethiol
    1-Bromo 11.49
    Naphthalene
    1-Chloro 17.85
    Naphthalene
    1-
    Naphthaldehyde 10.6
    1-
    Naphthylamine
    1- Naphthol 3.74
    Composition 1.616 1.64 1.67 1.61 1.606 1.583
    RI (pre-
    cure)
    Composition 1.642 1.668 1.70 1.628 1.627 1.603
    RI (cured)
    H27 H28 H29 H30 H31 H32 H33 H34
    Igacure 819 0.38 0.50 0.58 0.30 0.49 0.28 0.28 0.21
    Cyracure 0.23
    UVI6976
    SR 506 10.08 10.18
    CN2600
    Tribromophenyl Acrylate
    NK- BPEF 41.15 68.15 51.10 40.83 42.83 24.76 22.26 18.17
    NTT #6205 42.20 37.93 30.94
    2-Mercaptoethylthio- 16.45
    3propanthiol sulfide
    EP45HT 22.82
    NK-ester A-Len-10
    CN9167 25.21 20.13 21.54 12.54 11.19 9.14
    PTEA 12.45 13.30 13.50 11.37 13.56 7.84 7.05 5.75
    Ortho diallyl bisphenol A 18.05 9.61 8.00
    2,2′-Thiodiethanethiol 19.37
    1-Chloro Naphthalene
    1-Bromo Naphthalene 22.97 21.58 12.47 11.21 9.16
    Composition RI 1.608 1.606 1.592 1.59 1.6040 1.6370 1.6180 1.618
    (pre-cure)
    Composition RI 1.6290 1.60 1.6160 1.6313 1.6710 1.6540 1.6570
    (cured)
  • The compositions listed in the table above yield adhesives that provide a good RI match, as indicated by the invisible seal fixtures of the diffractive pattern region. Most exhibit good adhesion, while some (labeled in bold) exhibit excellent adhesion strength.
  • TABLE III
    Exemplary Mid Index Adhesive Compositions
    M1 M2 M3 M4 M5 M6 M7
    Irgacure 819 0.30 0.30 0.30 0.30 0.3
    Irgacure 184 1.20 1.20 1.20 1.20 3 3
    Darocur 1173 1.2
    CN2600 19.7 19.7 32.15 44.6 19.7 19.4 31.66
    SR 256 2.66
    SR 339 6.21
    SR 601 45.3 45.3 35.05 24.8
    SR 499 9.85 9.85 9.57 9.28
    CD 9088 8.87 8.15 7.44
    2-HEA 14.78 14.78 13.58 12.38
    SR 602
    SR 256 2.66
    SR 339 6.21
    SR 601 45.31 44.62 34.52
    SR 499 9.85 9.7 9.42
    CD 9088 8.73 8.04
    2-HEA 14.78 14.55 13.38
    Composition RI (pre-cure) 1.52 1.52 1.53 1.53 1.520 1.520 1.525
    Composition RI (cured) 1.55 1.55 1.55 1.56 1.550 1.550 1.555
  • The compositions listed in the table above yield adhesives that provide good adhesion and good RI match. These compositions may be useful to surface cast Trivex® to preformed MR-10 lens, since they have an RI between the RI of MR-10 (1.67) and Trivex® (1.53).
  • TABLE IV
    Exemplary Low-Index Adhesive Compositions
    L1 L2 L3 L4 L5
    Irgacure 819 0.26 0.35 0.10 0.37 0.3
    Irgacure 184 1.47
    Darocur 1173 1.2
    CN2600 31.84 19.63 19.7
    CN2922 69.11 17.08
    CN 131B 14.85
    SR 499 9.81 9.85
    SR 379
    SR 238 17.85 36.14
    CD 9088 8.83 8.87
    2-HEA 25.10 14.73 14.78
    614 15.20
    SR 379 12.78
    SR 602 59.35 45.16
    SR 601 45.31
    Composition RI 1.473 1.507 1.504 1.508 1.520
    (pre-cure)
    Composition RI (cured) 1.495 1.537 NA 1.538 1.549
  • The compositions listed in the table above yield adhesives that provide good adhesion and also good RI match. These composition may be useful to adhere polycarbonate and Trivex® substrates, since they have an RI between the RI of polycarbonate (1.58) and Trivex® (1.53).

Claims (4)

1-44. (canceled)
45. A device, comprising:
a) a first ophthalmic component,
b) a second ophthalmic component, and
c) a curable adhesive composition disposed between the first and second ophthalmic components, wherein the adhesive composition comprises
at least one high index-high viscosity component having a refractive index, before curing, of at least 1.56 at 25° C., and a viscosity, before curing, of at least 15,000cP at 25° C., and
a photoinitiator,
wherein the refractive index of the adhesive composition, after curing, is:
i) about equal to the refractive index of at least one of the first ophthalmic component and the second ophthalmic component,
ii) between the refractive index of the first lens and the refractive index of the second lens, or
iii) about equal to the average refractive index of the first ophthalmic component and the second ophthalmic component.
46. The device of claim 45, wherein the refractive index of the adhesive composition, after curing, is within 0.03 of the refractive index of at least one of the first ophthalmic component and the second ophthalmic component.
47. The device of claim 45, wherein at least one of the first ophthalmic component and the second ophthalmic component has a refractive index of about 1.67.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11061252B2 (en) 2007-05-04 2021-07-13 E-Vision, Llc Hinge for electronic spectacles
US10613355B2 (en) 2007-05-04 2020-04-07 E-Vision, Llc Moisture-resistant eye wear
JP5729973B2 (en) * 2010-11-11 2015-06-03 日本合成化学工業株式会社 Acrylic adhesive, adhesive for optical members, optical member with adhesive layer, image display device
JP5565277B2 (en) * 2010-11-09 2014-08-06 デクセリアルズ株式会社 Anisotropic conductive film
JP5854791B2 (en) * 2010-12-03 2016-02-09 日本合成化学工業株式会社 Adhesive, adhesive for optical member, optical member with adhesive layer, image display device, active energy ray-curable adhesive composition
US9074040B2 (en) 2010-12-20 2015-07-07 Mitsui Chemicals, Inc. Curable adhesive compositions
KR101864920B1 (en) * 2011-09-27 2018-06-05 마루젠 세끼유가가꾸 가부시키가이샤 Optical element material and method for producing same
TWI446609B (en) * 2011-11-15 2014-07-21 Ind Tech Res Inst Dye sensitized solar cell
JP6063228B2 (en) * 2012-11-30 2017-01-18 デンカ株式会社 Photocurable resin composition
EP3024902B1 (en) * 2013-07-22 2019-09-11 CeramTec-Etec GmbH Transparent adhesive with a refractive index ranging from 1.7 to 1.73
JP6508060B2 (en) * 2013-12-27 2019-05-08 日本ゼオン株式会社 Optical laminate and surface light source device
CN106103632B (en) * 2014-03-18 2020-07-17 胡网加成股份有限公司 Radiation curable resin composition
US10066136B2 (en) 2014-04-22 2018-09-04 Dow Global Technologies Llc Polyurethane-acrylate epoxy adhesive
KR102206665B1 (en) * 2014-05-30 2021-01-22 덴카 주식회사 Photocurable resin composition
DE102015215870A1 (en) * 2014-08-20 2016-02-25 Ceramtec-Etec Gmbh Transparent adhesive
KR102332623B1 (en) * 2015-01-05 2021-11-30 삼성디스플레이 주식회사 Manufacturing method of display device and display device manufactured by the same
US10113082B2 (en) * 2016-09-19 2018-10-30 Xerox Corporation UV curable interlayer composition for printed electronics application
KR102063052B1 (en) * 2016-11-25 2020-01-07 주식회사 엘지화학 Curable Composition
CN107245318A (en) * 2017-07-13 2017-10-13 深圳市安泉科技有限公司 One photocuring glue and its preparation method and application
WO2019131572A1 (en) 2017-12-26 2019-07-04 富士フイルム株式会社 Lens adhesive, cemented lens, and imaging module
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AU2020314047A1 (en) * 2019-07-12 2022-02-17 Mondofix Inc. Thiol-based adhesive formulations for repairing windshields
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EP3910411A1 (en) * 2020-05-13 2021-11-17 Essilor International Primer for ophthalmic lenses
CN112094615B (en) * 2020-08-27 2022-08-12 浙江美浓材料科技有限公司 UV mold pressing lens adhesive and preparation method and application thereof
CN113512365A (en) * 2021-05-18 2021-10-19 江苏集萃智能液晶科技有限公司 Ultraviolet-curing structural adhesive composition and application thereof
KR20230063427A (en) * 2021-11-02 2023-05-09 동우 화인켐 주식회사 Adhesive composition, adhesive sheet and image display device prepared from the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040870A (en) * 1989-10-13 1991-08-20 Sumitomo Chemical Company, Limited Screen for projection

Family Cites Families (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668558A (en) * 1978-07-20 1987-05-26 Minnesota Mining And Manufacturing Company Shaped plastic articles having replicated microstructure surfaces
US4487904A (en) * 1983-09-21 1984-12-11 Toray Industries, Inc. Urethanized acrylic resin material for plastic lens and lens composed thereof
US4812032A (en) * 1984-09-19 1989-03-14 Toray Industries, Inc. Highly-refractive plastic lens
EP0176874A3 (en) * 1984-09-19 1988-02-10 Toray Industries, Inc. A highly-refractive plastic lens
US4954591A (en) * 1987-11-06 1990-09-04 Pilkington Visioncare Holdings, Inc. Abrasion resistant radiation curable coating for polycarbonate article
DE3923023A1 (en) * 1989-07-12 1991-01-24 Siemens Ag UV CURABLE ADHESIVE FOR A SEMICONDUCTOR CHIP ASSEMBLY PROCESS
US5183831A (en) * 1991-08-22 1993-02-02 Ciba-Geigy Corporation Radiation curable composition with high temperature oil resistance
US5566027A (en) * 1993-01-18 1996-10-15 Canon Kabushiki Kaisha Photocurable resin composition and optical lens produced therefrom
US5426166A (en) * 1994-01-26 1995-06-20 Caschem, Inc. Urethane adhesive compositions
KR100212410B1 (en) * 1994-02-01 1999-08-02 야마모토 카즈모토 Novel resin compositions
US5626800A (en) * 1995-02-03 1997-05-06 Minnesota Mining And Manufacturing Company Prevention of groove tip deformation in brightness enhancement film
DK1116964T3 (en) 1995-07-29 2004-06-01 Sanyo Chemical Ind Ltd UV-curing resin mass for Fresnel lenses, Fresnel lenses and a rear projection screen
US5698285A (en) * 1995-10-19 1997-12-16 Three Bond Co., Ltd. Adhesive for optical disk
US6224976B1 (en) 1996-08-14 2001-05-01 Asahi Kogaku Kogyo Kabushiki Kaisha Adhesive transparent resin and a composite including the same
JPH1067970A (en) * 1996-08-28 1998-03-10 Nippon Steel Chem Co Ltd Adhesive for optical disk and optical disk
JPH1097970A (en) * 1996-09-20 1998-04-14 Toshiba Corp Method for forming resist pattern
US5992314A (en) * 1997-06-30 1999-11-30 Ncr Corporation UV curable adhesive for stencil media
JP3610234B2 (en) * 1998-07-17 2005-01-12 株式会社メディア・テクノロジー Iris information acquisition device and iris identification device
JP3988267B2 (en) * 1998-08-20 2007-10-10 Jsr株式会社 Adhesive for optical disc
US6242065B1 (en) * 1998-10-07 2001-06-05 Bmc Vision-Ease Lens, Inc. Lens blanks for ophthalmic elements
US6342545B1 (en) * 1998-11-23 2002-01-29 Loctite Corporation Radical-curable adhesive compositions, reaction products of which demonstrate superior resistance to thermal degradation
US6150479A (en) * 1998-11-23 2000-11-21 Loctite Corporation Radical-curable adhesive compositions, reaction products of which demonstrate superior resistance to thermal degradation
US6171675B1 (en) * 1999-05-20 2001-01-09 Nagase-Ciba Ltd. UV-curable adhesive composition, method of preparing optical disc and optical disc produced thereby
JP3617381B2 (en) * 1999-08-02 2005-02-02 ダイソー株式会社 Curable resin composition
JP2001101710A (en) * 1999-09-29 2001-04-13 Nippon Zeon Co Ltd Laminated disk
US6663978B1 (en) * 2000-06-28 2003-12-16 3M Innovative Properties Company High refractive index pressure-sensitive adhesives
CA2386847A1 (en) * 1999-10-28 2001-05-03 Cheryl L. Moore High refractive index pressure-sensitive adhesives
US6416690B1 (en) * 2000-02-16 2002-07-09 Zms, Llc Precision composite lens
JP3344408B2 (en) * 2000-04-13 2002-11-11 ダイソー株式会社 Curable resin composition
KR100761184B1 (en) * 2000-04-20 2007-10-04 디에스엠 아이피 어셋츠 비.브이. Curable resin composition, cured film, and composite product
US6760533B2 (en) * 2001-04-06 2004-07-06 Nippon Sheet Glass Co., Ltd. Optical adhesive composition and optical device
EP1388852A4 (en) 2001-05-17 2004-08-18 Nippon Kayaku Kk Adhesive for optical disk and optical disk
CN1327293C (en) 2001-07-26 2007-07-18 西巴特殊化学品控股有限公司 Photosensitive resin composition
US6805358B2 (en) * 2001-08-16 2004-10-19 Isomag Corporation Magnetic seal
WO2003070798A1 (en) 2002-02-20 2003-08-28 Dai Nippon Printing Co., Ltd. Resin composition and optical elements
AU2003281687A1 (en) * 2002-07-29 2004-02-16 Mitsui Chemicals, Inc. Photopolymerizable composition and use thereof
JP2004210617A (en) * 2003-01-08 2004-07-29 Kansai Paint Co Ltd Photosetting type repairing agent and adhesive for glass
GB0304011D0 (en) * 2003-02-21 2003-03-26 Microsharp Corp Ltd High refractive index material
KR100568581B1 (en) * 2003-04-14 2006-04-07 주식회사 미뉴타텍 Composition for mold used in forming micropattern, and mold prepared therefrom
US7074647B2 (en) * 2003-07-07 2006-07-11 Freescale Semiconductor, Inc. Semiconductor component comprising leadframe, semiconductor chip and integrated passive component in vertical relationship to each other
WO2005007751A1 (en) * 2003-07-18 2005-01-27 Konishi Co., Ltd. Curable resin composition and cold-setting adhesive
US7439278B2 (en) * 2004-05-04 2008-10-21 Essilor International Compagnie Generale D'optique Curable adhesive composition and its use in the optical field
CN101253227B (en) * 2005-10-04 2011-05-18 日本印帝股份公司 Structure having specific surface shape and properties and (meth)acrylic polymerizable composition for formation of the structure
US7463417B2 (en) * 2006-02-13 2008-12-09 3M Innovative Properties Company Optical articles from curable compositions
US7555843B2 (en) * 2007-08-22 2009-07-07 Lance Leonard Construction layout marking device
JP5243887B2 (en) * 2008-02-12 2013-07-24 富士フイルム株式会社 Curable composition for nanoimprint and pattern forming method
US8523354B2 (en) * 2008-04-11 2013-09-03 Pixeloptics Inc. Electro-active diffractive lens and method for making the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040870A (en) * 1989-10-13 1991-08-20 Sumitomo Chemical Company, Limited Screen for projection

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Idacavage et al. Halogen-Free UV Curable High Refractive Index Materials for Light Management. Cytec Industries, In. Strategy Technology Group. Cytec Industries Georgia Tech Nano@Seminar Series. (2010). Retrieved from internet on 09-27-2013. Retrived from . *
ocular. (n.d.). Dictionary.com Unabridged. Retrieved June 18, 2014, from Dictionary.com website: http://dictionary.reference.com/browse/ocular *
ophthalmic. (n.d.). Dictionary.com Unabridged. Retrieved June 18, 2014, from Dictionary.com website: http://dictionary.reference.com/browse/ophthalmic *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3395922A1 (en) * 2017-04-26 2018-10-31 Essilor International Optical adhesive for glass and polycarbonate
KR20190123346A (en) * 2017-04-26 2019-10-31 에씰로 앙터나시오날 Optical Adhesives for Glass and Polycarbonate
KR102289304B1 (en) 2017-04-26 2021-08-13 에씰로 앙터나시오날 Optical adhesives for glass and polycarbonate
US11434401B2 (en) 2017-04-26 2022-09-06 Essilor International Optical adhesive for glass and polycarbonate
CN112457767A (en) * 2020-11-30 2021-03-09 厦门三德信科技股份有限公司 High-refractive-index coating and preparation method thereof

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