JPS61503016A - How to attach thin glass to a thermoplastic substrate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] On thermoplastic resin base How to attach thin glass The present invention provides a resin laminate with particularly excellent scratch resistance, scratch resistance, and chemical solvent resistance. Or related to the sheet manufacturing method.

More particularly, the present invention provides a UV (ultraviolet) cured adhesive on at least one exterior surface. Manufactures resin laminates or sheets in which thin glass is bonded by an adhesive interlayer. It relates to the method of

Such laminates or sheets are particularly scratch resistant, scratch resistant and chemical resistant. Excellent, no internal stress at room temperature or selected UV curing temperature, resistance It is characterized by excellent impact resistance and light weight.

Such laminates utilize the excellent properties of both glass and resin thermoplastic. In combination, a single product with the above properties is produced.

Background of the invention Thermoplastic sheets or stacks with a thermoplastic outer surface, especially a polycarbonate outer surface. Layers are well known and commercially available.

Such laminates or sheets can be engineered to undergo a wide range of chemical and physical It can be made to have certain characteristics. Often these laminates or sheets Products made from glass are lighter in weight and more break-resistant than glass, and are therefore more durable. For example, manufacturing taillights, protective shields for streetlights, safety shields for inspection windows, windshields, government buildings, etc. How is it used as a replacement for glass? However, using thermoplastic resin Although it has many advantages, it is weak in terms of surface properties such as scratch resistance and chemical solvent resistance. Galvanized glass is far superior to the materials listed above.

One direction of development is to combine a thermoplastic thin film with an outer thin film of glass to create a laminate. The problems associated with these poor surface properties were solved by This way Una laminates benefit from the toughness of thermoplastics and the scratch resistance and strength of glass. Ru.

British Patent No. 2015427 describes the method of applying an adhesive interlayer in a glass-thermoplastic laminate in-situ. It discloses that UV curing is performed. The laminate as disclosed therein is Most of the volume is glass, resulting in pure resin in these laminates. Some of the light weight and toughness properties of the laminate are lost.

U.S. Pat. No. 3,666.614 discloses that one central thin layer of polycarbonate is Both outer thin layers of glass bonded via an adhesive interlayer such as vinyl butyral etc. A laminate having the following is disclosed. ” As in the second case, these laminates A significant portion of the product is glass and is therefore correspondingly heavier and less durable. Impact resistance decreases.

Another direction of development is that the poor surface properties of thermoplastic laminates and sheets improved by using a thin protective layer of various organic or inorganic coatings. this These protective coatings significantly improve the scratch resistance and chemical solvent resistance of many resin materials. Improved. However, further improvements are still needed.

U.S. Pat. No. 4,200,681 (assigned to the same assignee as the present invention) ,]) containing photoreaction products of certain polyfunctional UV-curable acrylic monomers. An intermediate primer layer and (11) the two most layers of vapor-deposited silicon dioxide are attached to the surface. A polycarbonate article is disclosed. This product is improved from the previous product. However, the adhesion and crack resistance of the deposited silicon dioxide film There is some variation.

In this way, surface properties such as scratch resistance and chemical solvent resistance are relatively good or excellent. Although there are thermoplastic laminates and sheets in existence, such laminates and sheets If the volume of the outer glass membrane increases or the scratch resistance of the thin protective coating increases, and have low resistance to chemical solvents.

Therefore, one object of the present invention is to provide scratch resistance and chemical solvent resistance, at least A thin sheet of glass is bonded to one surface using a UV-cured adhesive. An object of the present invention is to provide a method for manufacturing a thermoplastic sheet or laminate containing a thermoplastic sheet or a laminate.

Another object of the invention is to provide a thin film bonded by a UV-cured adhesive interlayer. Adhering the glass sheet to at least one surface of the thermoplastic sheet or laminate This thermoplastic sheet or laminate can be damaged and eroded by chemical solvents. The goal is to provide a way to protect against

Yet another object of the present invention is to provide UV cured acrylated urethane intermediates. Polycarbonate thin glass sheet by layer or UV cured epoxy interlayer This point can be made by adhering to at least one surface of the sheet or laminate. Provides a method to protect recarbonate sheets or laminates from damage and chemical solvent attack. It is to provide.

Another object of the present invention is to provide a thin glass sheet on a substrate. The objective is to provide a method that does not damage or crush the base.

Description of the invention Briefly, the present invention is characterized by in-situ UV curing of the adhesive interlayer. It is best to apply a thin glass sheet to the thermoplastic substrate by using a method that Something was discovered. More specifically, the work required to implement this method is In some cases, a thin film of a solvent-free photocurable adhesive composition is applied to a thermoplastic substrate. , a thin glass having a thickness of about 0.3 mils to about 20 mils is deposited on top of the uncured adhesive composition. This composite can be photocured by irradiating it with UV light under appropriate conditions. forming a photocured adhesive interlayer by curing the adhesive composition; be caught. This method is also added for handling while placing thin glass sheets. may include the steps of

Suitable thermoplastic substrates that may be used include acetal homopolymers, trios, Acetal copolymer produced by the polymerization of xane and ethylene oxide, Poxy resin, polycarbonate, polyetherimide, borife, =renoxa Phenylene like ide or blend of polyphenylene oxide and styrene resin Oxide-based resins, polyarylethers, polyesters, polyesters Tyrene, polyphenylene sulfide, polypropylene, polysulfone, ethyl vinegar Ethylene polymers such as vinyl chloride, conductive plastics and well-ordered aromatic aromatic copolymers, etc. These thermoplastic materials can be formed into sheets Can be done.

As a double series, this substrate is made of thermoplastic polycarbonate, especially aromatic polycarbonate. Carbonates are preferred. These react dihydric phenols with carbonate precursors Homopolymers and copolymers and mixtures thereof produced by . Suitable dihydric phenols of the bisphenol type are readily available and are protected by U.S. patents. No. 2,999.835, No. 3.028,365 and No. 3,334,154 (incorporated herein by reference).

Polymethacrylate resins can be used in sheets or as thermoplastic outer layers in laminates. It is universal. Suitable methacrylic resins include, for example, methacrylic acid. Methyl, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, etc. Polymers or resins obtained by polymerizing one or more methacrylic esters such as is included. Copolymers of acrylic and methacrylic monomers are also described herein. It is included within the term acrylic resin that appears in. There are many advantages to carrying out the present invention. Acrylate monomers and methacrylates to provide reacrylate resins Polymerization of the monomers may be carried out by any of the well-known polymerization techniques. preferred acrylic The resin is poly(methyl methacrylate).

Suitable thin glasses are currently being produced and are available commercially. thin glass It is manufactured by a drawing process in various thicknesses ranging from about 3 mils to about 20 mils.

In the pilot plant process, the thickness of such glass was reduced to 0.3 mil. lath is manufactured. Currently, the above method is used to produce thin glass. Although the above-mentioned thickness is available on the market, the scope of the present invention is The meaning is not limited to these. Thin with a thickness of about 0.3 mil to about 20 mil Any type of glass is suitable.

Suitable UV-curable adhesive interlayers are made of commonly used solvent-free UV-curable adhesives. It is a photoreaction product of either. The required requirement is that the cured adhesive is usually flexible. adhesive and have a viscosity low enough that the uncured adhesive flows easily. Is Rukoto. Due to physical application limitations, adhesives do not cure in the presence of solvents; No by-products such as water or gases are produced during oxidation, and the adhesive is compatible with the underlying substrate. That means it has to be gender. However, a person skilled in the art will not be able to meet the above requirements. Other solvent-free UV curable adhesives may come to mind, such as photosensitized acrylate, Photosensitized epoxy.

and photosensitized thiol-enes are preferred.

Suitable acrylates or methacrylates for the adhesive interlayer are acrylic monomers or metals. Homopolymer of tacryl monomer.

copolymers, terpolymers, etc., and these monomers further include (1) polyvalent carbonization. polyfunctional acrylic or methacrylic monomers containing hydrogen ester groups, and/or or (2) Polymeric monomodified with polyfunctional acrylic or methacrylic (However, the ends of unbranched or branched polymer chains are functionalized acrylic or (terminated with methacrylic end groups or mixtures thereof) It may contain -. In addition, others such as vinyl monomers and allyl monomers A small amount of aliphatic unsaturated 9-monomer may also be present.

A crosslinkable polyfunctional acrylic or methacrylate having a polyvalent ester group in the group (1) above. Suitable crylic monomers are represented by the following general formula.

where n is an integer having a value of 2, 3 or 4, and R is an integer containing less than 20 carbons. and an n-valent aliphatic group, an n-valent group having an alicyclic component, and an aromatic component. selected from the group consisting of n-valent organic groups having selected from the group. For example, a preferred diacrylate is 1,6-hexane Diol diacrylate, suitable triacrylate is pentaerythritol triacrylate, and a suitable tetraacrylate is pentanyltrittete It is la acrylate.

Preferred polyfunctional acrylic or methacrylic monomers of formula (1) have the following general formula: expressed.

Here, Q is C(1-18) aliphatic, c(3-yo□) alicyclic, and C(8-18) ) is an n-valent organic group selected from aromatics, R' is hydrogen or a methyl group, and R 2 is alkylene and n is 2, 3 or 4. Included in Q in formula (2) Groups include, for example, alkylene groups such as ethylene, hexamethylene, etc., phenylene groups, etc. , tolylene, xylylene, etc., and the groups included in R2 are For example methylene.

Ethylene, propylene, etc.

Polyfunctional acrylic or methacrylic in the group (2) above also has two terminal acrylics. or branched or unbranched polyesters, polyethers with methacrylic functional groups. polyamine, polyimide, polyamide, polycarbonate, polyurethane , epoxy, etc. These modified polymeric monomers are represented by the following general formula: It will be done.

Here, "polymer" refers to polyvalent polyester, polyether, polyamine, polymer, etc. Liimide, polyamide, polycarbonate, polyurethane, polyepoxide, etc., and R3 is a polyvalent C(1-10)” group, and r and U have values of 1-3. (provided that the sum does not exceed 5), and S is 1°2 or 3.

For example, a typical acrylic or The methacrylic modified polymer is an acrylate polyester represented by the following formula: Acrylate epoxy represented by the following formula: and acrylate epoxy represented by the following general formula: Rate urethane: However, m is 1 to 100 or more.

Preferred polyfunctional acrylic or methacrylic modified polymeric monomers have the formula ( 3) R3 contains a urethane bond. These modified polymer properties The monomer can be represented by the following general formula.

HOOR' where r, s, u and "polymer" are defined above and R4 is C( 1 to 9) are polyvalent aliphatic a-groups.

In the present invention, the main components of the UV curable acrylic composition are acrylic monomer and metal. It is a tacryl monomer. Suitable such monomers are represented by the following general formula: be done.

R'0 where R/ is as defined above and R5 is a monovalent aliphatic group.

For example, R5 is lower (C-C2o)alkyl or a mixture thereof, e.g. Methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate That's fine. Also, if there is no crosslinking, epoxide, carboxyl, hydroxy Ester groups such as R, etc. are also included in R5.

Preferred among suitable acrylic and methacrylic monomers are esters. A monomer whose group contains a urethane bond. These monomers are generally R’OOH expressed by the formula Here, R' is as listed above and R6 is C(1-B) alkylene, e.g. is selected from methylene, ethylene, propylene, etc., and R7 is C(1-18) fat. group groups and C(6-18) aromatic groups, such as methyl, ethyl, propyl, butyl, Chill.

Alkyl groups such as phenyl, xylyl, tolyl, etc.

selected from aryl groups such as cap. Acrylic relay suitable especially for use in formula (9) is N-n-butyl-acryloxyethyl carbonate, 2-acryloxy Ethyl N-phenyl carbonate, 2-methacryloxypropyl N-phenyl carbonate, 2-acryloxypropyl N-phenyl carbonate, etc. Ru.

Suitable UV photosensitizers for acrylics are well known.

Some non-limiting examples of these UV photosensitizers include benzophenone, acetophyl Ketones such as phenone, benzyl, benzyl methyl ketone, benzoin methyl ethers, benzenes such as α-hydroxymethylbenzoin isopropyl ether Zoins and substituted benzoins, α-bromoacetophenone, p-bromoacetate halogen-containing compounds such as tophenone, α-chloromethylnafretane, aromatics Sulfur compounds such as disulfides, as well as azides, thioketones, and may be used in combination with other photosensitizers, diarylpenes, etc. peroxides, hydroperoxides, peracids and peresters, and azotization compound, or di-t-butyl peroxide, benzoyl peroxide, 2,4-peroxide Dichlorobenzoyl, t-butyl hydroperoxide, peracetic acid, perbenzoic acid, peroxy Other known free agents such as t-butyl acetate, azobisisobutyronitrile, etc. Contains a radical initiator.

The photosensitized epoxy resin of the present invention comprises a monofunctional epoxy monomer and a polyfunctional epoxy monomer. homopolymers, copolymers, and terpolymers of photopolymerization products with epoxy monomer crosslinkers. Polymers, etc. The functional epoxy group is usually a glycidyl epoxy monomer. Oxy group, alicyclic epoxy group, vinyl epoxy group.

Exists as internal epoxy group or methylglycidyl epoxy group. preferred official Functional epoxy groups include glycidyl epoxy groups, alicyclic epoxy groups and vinyl epoxy groups. It is a group.

Suitable polyfunctional epoxy monomer crosslinkers are polyfunctional epoxy organic molecules or It is a branched or unbranched polymer chain with a poxy terminus. Add epoxy to the ends The polymer chains are e.g. shrimp chlorohydrin-BPA resin, glycidyl ether Diol-diisocyanate resin with terminals, polyethylene oxide digly glycidyl ether, polypropylene oxide diglycidyl ether, bisepoxy With cyclobentyl succinate, cresol-novolac epoxy resin 1, etc. be. Polyfunctional epoxy H molecules are, for example, vinylcyclohexenedioxa ido 1 bis(3゜4-epoxy 6-methylcyclobequinylmethyl) ajibe -l-,3,4-Epoxine Chlohexylmethyl-3,4-Evoxine Chlohexyl Cycloaliphatic epoxides such as Sancarboxy 1 Note, etc., such as ethylene glycol, etc. Recall, propylene glycol, 1,6-hexanedicarboxylic acid 7, etc. and shrimp Diglycidyl ethers or diglycidyl ethers formed as a result of reaction with lorohydrin aliphatic polyepoxides such as polyesters, and 2,2'-bis(4,4 ’　Dihydroxyphenyl)propane diglycidyl ether, terephthalic acid or or isophthalic acid diglycidyl ester, triglycidyl isocyanurate, etc. aromatic polyepoxides such as

All of the epoxide adhesive interlayer compositions of the present invention contain mostly +11 functional epoxy resin. It's Kishi. These monofunctional epoxies contain either aliphatic or aromatic hydrocarbons. There may be any of the above epoxide functional groups attached to the group. This monofunctional epo Preferably, xy is an α-olefin oxide of the following general formula.

■ Here, R8 is methyl or hydrogen, and R9 is hydrogen.

C<e~48) may be an aromatic organic group, but a C(1-30) aliphatic organic group is preferred; . Preferred monofunctional epoxide monomers of formula (10) are, for example, those of the following formula: Ru.

H3 UV sensitizers suitable for use with epoxies, although other UV sensitizers are also known. No. 4,319,974, commonly assigned to the present invention. No. 4,407゜759, No. 4,250', No. 311 2 No. 4,264,703 4, 310, and 469.

The disclosures thereof are incorporated herein by reference.

The epoxy and acrylic resins described above are suitable for use in the practice of this invention. There are other thiol-enes, some of which have been described by Kcrr et al. U.S. Patent Nos. 3,697.395, 3,697,396, 3,697°4 No. 02, No. 3,700,574 and No. 3,661°744 (citing these (herein incorporated by reference). These thiol-ethylene trees Fats include photoreactive substances such as benzophenone, acetophenone, dibutyl ketone, etc. It can be cured using an initiator.

Acrylic, epoxy or thiol-ene adhesive interlayer compositions are available from those well known in the industry. According to the above preferred acrylic monomers, the preferred urethane esters of the bipedal Manufactured from acrylic monomers, the above epoxy monomers or the above thiol-enes. can be done. Each group of monomers is treated with a suitable UV opener and as required below. Blend with the mentioned additives to form a substantially homogeneous composition. specific monomer Selection of species and monomer ratios, photoinitiators and additives is important for determining the uncured composition. To meet the criteria of low viscosity of the product, flexibility of the cured composition and good adhesive properties is within the knowledge of the industry. The viscosity of the uncured composition is such that thin glass can be attached to the substrate. The flexibility of the cured adhesive should be low enough to must be sufficient to retain impact strength and adhesion. Generally these eyes In order to achieve the target, the majority of any UV curable adhesive composition must be It should be composed of non-crosslinking monomers.

The adhesive interlayer compositions of the present invention optionally contain various surfactants.

It may also contain thixotropic agents and UV light absorbers.

All of these additives and their use are well known in the industry. It doesn't require much discussion. As above, i.e. surfactants, UV light absorbers, etc. Any compound that has the ability to function as a primer is useful for photocuring the primer composition. without harmful effects and on the transparency of coated polycarbonate articles. It can be used as long as there are no adverse effects.

Various surfactants including anionic, cationic and nonionic surfactants Kirk-Othmer Encyclopedia opedia or Chemical Tea)+nology), Volume 19 , Interscience Publisher ishers), New York, 1969.

pages 507-593, and Polymer Science and Technology Encyclopedia ncyc1opedia of Polymer 5science and Tcchnolgy, 13th roll.

Interscience Pub Ishors, New York, 1970, pp. 477-486 (these are both references and are incorporated herein by reference. Ru.

1. As mentioned above, a suitable UV-absorbing compound can be added to a substrate sensitive to the degrading effects of UV light. may be added to the υV curable blue-tightening intermediate composition in an amount effective to protect the υV. Ta However, these compounds may interfere excessively with the photocuring of the intermediate layer composition. shall not interfere with it. Benzophenones and pens/1. Riazoles Although the melon may be adjusted and used, a latent ultraviolet light absorber is preferable. Appropriate PI presence Some non-limiting examples of aqueous ultraviolet light absorbing compounds include p-octylphenyl salicylate; Phenyl salicylate, t-butylphenyl salicylate.

salicylic acid esters, such as, and resorcinol mono, nobenzoate, etc. It is a monobenzoate.

In carrying out the present invention, first a monomer mixture, a photoinitiator, and A photocurable composition is prepared by adding any of the above additives. These various The ingredients are mixed well to form a substantially uniform adhesive layer composition. Then this adhesive A UV curable blue tint composition is interposed either before or simultaneously with UV curing of the composition. Assemble a ta aggregate of soldered thin glass and a thermocrystalline substrate. The preferred method of assembly is Soaking.

Adhesive assembly by any known means such as spraying, roller coating, etc. A thin, uniform coating of the composition is provided on a substrate such as polycarbonate sheet 1. one Generally, the adhesive layer composition comprises a cured coating or layer having a thickness of about 0.1 mil to about 20 mil. Apply enough jS to obtain. Unhardened thin glass by some suitable method of the adhesive composition.

The viscosity of the adhesive interlayer is low enough that air bubbles and excess adhesive are easily removed. Ma The stress on the glass is minimized due to the low viscosity of the adhesive interlayer composition. Ru. During assembly, large or particularly thin glass sheets may be bonded to an uncured intermediate Unless supported or otherwise specially handled while adhering to the layer. No. This involves a light application of UV light on the side of the glass opposite the uncured adhesive interlayer. A transparent support backing can optionally be used.

Alternatively, a thin glass attached to a support backing and a thermoplastic substrate may be spaced apart. An uncured adhesive interlayer may be injected between the juxtapositions. This is the case with thick glass. Such a method is described in UK Patent No. 2015427 (herein incorporated by reference). Are listed.

The thermoplastic resin substrate, adhesive interlayer composition, and optional supporting backing material are combined into four layers. The thin glass composite is exposed to light such that the uncured adhesive interlayer is irradiated through the thin glass. Then apply UV irradiation. Uncured adhesive intermediate through a suitable resin substrate that is transparent to UV Although the layers may be irradiated, many of these substrates are sensitive to UV radiation and other may not be transparent to UV radiation.

A suitable wavelength of UV radiation can be between 2537 and 4000. like this The lamp system used to generate the radiation can be any discharge lamp A lamp is fine. For example, the generated pressure ranges from a low pressure of a few millitorr to about 10 qi 1 king. , xenon, metal halide, metal arc, low pressure or high pressure mercury vapor discharge lamp etc. can be used.

A lightly adhered support backing prevents the fragile glass from breaking or shattering during assembly. The adhesive interlayer can then be removed from the thin glass surface after curing.

The supporting backing material can be easily removed by mechanical or chemical means after curing. The glass must be flexible to adhere to the uncured adhesive interlayer. In addition, UV curing of the adhesive intermediate layer through thin glass is possible. Must be transparent to the line. This supporting backing material is a sheet that is adhesive in nature. coated with an organic adhesive on at least one side, such as a sheet or contact adhesive sheet. It can be applied as a liquid to a thin glass sheet and then cured by polymerization, crosslinking, solvent evaporation, or any combination thereof. The backing material may have a high viscosity or be flexible but in a solid state.

Suitable supporting backing materials are polymeric materials, cellophane, and glass.

etc. sheet. Apply to these sheets when it is necessary to impart tack. Suitable organic adhesive coats are siloxane, epoxy and acrylic adhesives. Ru. These and other adhesives suitable for such use are listed in the Adhesives Handbook (t l) c 1landbook or Adhesives), 2nd edition, Fan・ Nostrand Reinhold Company (Van No5trand Re1 nhold Company), New York, New York, 1962 , which is incorporated herein by reference.

A support backing material suitable for application to thin glass as a liquid will adhere to the glass and dry. Dry dipolymerization or crosslinking with high viscosity or alla property but solid state Any such material that will support the glass during further processing by A UV-transparent night machine is fine.

Preferred specifics of the invention The above describes a method for manufacturing thermoplastic resin articles that exhibit typical scratch resistance and chemical solvent resistance. did. The following specific examples are presented to more fully and clearly explain the invention. do. These examples illustrate the invention disclosed and claimed herein. It is to be considered illustrative rather than limiting.

Example 1 Hydroxyethyl acrylate (47F:, 0.4 mol).

Butyl isocyanate (40g, 0.4mol), dibutyltin dilaurate (0, 01g) and t-butylcatechol (0,is') were combined and heated at 75°C for 7 hours. Stir to add N-n-butyl-acryloxyethyl carbamate (HEAB). Obtained. Infrared absorption (thin film): a, O and 5.83u.

HEAB I of Example 1 10 pbw was mixed with jetoxyacetophenone O, 1, pb A UV-curable adhesive interlayer composition was prepared in combination with v.

Example 3 1) Place a 6'x6' 2 mil thin piece of glass on top of the glass plate; Place a portion of the UV-curable composition on a thin glass, 3) 4'X4'X1/4' of LEXAN sheet panel is placed on top of the curable composition, 4) excess of Squeeze out the UV-cured composition without leaving any bubbles; 5) Model 1202 AN　PPG　In the UV processor, turn the sample glass side up and add 2 nitrogen gases. Cure with belt speed set to 20 minutes while running at 0 cubic feet per minute. Corning Grass, Elmira, New York A layer of thin glass made of Corr+ ng Glass is coated with LEXAN wood. It was bonded to a polycarbonate sheet 1. Cut off the excess glass from the edge.

Example 4 The glass of the polycarbonate sheet that protected the surface of Example 3 was - G1tt8rsebnittpruf'ger at) Mark with a crosshatch adhesive cutter and mark the crosshatched area. Area marked with Mystlk 6432 tape Adhesive strength was tested by suddenly pulling the tape off. tape the glass I couldn't get it.

Example 5 320 In-1bs Gardner falling spear tester (Gardnor F all, ng Dart Te5ter) on the side opposite to the glass (reverse The scratch resistance of the sample of Example 3 was tested by impact). Glass is good The poly girder was still glued to the monobonate. Polycarbonate is ductile , no cracks occurred in this test.

Example 6 Model 174 Taber Abrasion Tester (T The sample of Example 3 was abraded 1000 times with Tested for wear resistance. The difference in cloudiness after Taber wear is determined by Gardner. r) Model UX, measured using a 10 haze meter (Ilazemeter) It was 1.2%. The glass surface may be scratched even if scratched with sharp objects. There was no.

Example 7 A polycarbonate sheet with a protected surface was produced by reversing the procedure of Example 3.

However, H of Example 2 containing 0.5 pbν of resorcinol monobenzoate EAB T 10 pbv was used.

The procedure of Example 7 was repeated to produce a polycarbonate sheet with a protected surface. . However, H of Example 2 containing resorcinol monobenzoate 1 pbv EAB I 10 pbv was used as adhesive interlayer.

Example 9 HEABllopbv from Example 1 was mixed with 0.2 pbw of benzophenone and methyl dichloromethane. A UV-curable adhesive composition was made with 0.2 pbw of ethanolamine. .

Example 10 1) Borden Company of Columbus, Ohio U sold under the name Krylon by Inc. A 1-2 mil layer of clear polymer was applied to the V, at Elmira, New York. ra) is fused to a thin glass made by Corning Glass. 2) cut the thin glass to appropriate dimensions, 3) attach it with Lexan (L) E X A N) Uncured adhesive of Example 9 on one side of the resin polycarbonate sheet 4) providing a wave film of the agent composition, 4) evacuating air and coating the exterior with a UV transparent polymer; Place the thin glass sheet on top of the uncured adhesive so as to form a composite. )Model 1202AN PPG In UV processor, at a belt speed of 20 min with a nitrogen flow of 20 standard ft3/min. 6) Apply isopropanol and swell the polymer. The process involves removing the UV-transparent polymer from thin glass by scraping it off. Thus, a 10 mil thin glass sheet was bonded to a polycarbonate sheet. profit The size of the resulting laminate was 14' x 11'.

Although the present invention has been specifically described below, there may be cases where it deviates from the scope of the present invention in accordance with patent law. Of course, it is clear that modifications can be made without having to do so.

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Claims (1)

[Claims] 1) a) A thermoplastic substrate and a thin glass sheet having a thickness of about 0.3 mils to about 20 mils. combined with a solvent-free UV curable adhesive composition b) abrading the thermoplastic substrate comprising irradiating the adhesive composition with UV light; and how to protect against chemical solvent attack. 2) Prior to the above combination step i) applying a UV transparent supporting backing material to the sheet of wide glass; Following the irradiation step 2. The method of claim 1, further comprising the step of ii) removing said support backing. 3) The supporting backing material in the bonding step is a contact adhesive sheet. Method 2. 4) The method of claim 2, wherein said support backing is bonded from a solution in said bonding step. 5) The method of claim 2, wherein in the removing step, the supporting backing material is removed by dissolution. . 6) Claim 2, wherein the supporting backing material is removed by mechanical peeling in the removing step. the method of. 7) The method according to claim 1, wherein in the irradiation step, the composite is irradiated from the direction of the thin glass. Method. 8) In the combining step, the thermoplastic substrate is made of polycarbonate and polymethylmethane. 2. The method of claim 1, wherein the method is selected from the group consisting of acrylates.