JP5468896B2 - Polycarbonate resin laminate - Google Patents

Description

  The present invention relates to a polycarbonate resin laminate. More specifically, the present invention relates to a polycarbonate resin laminate excellent in transparency and scratch resistance in which a modified polycarbonate resin layer derived from a specific bisphenol structural unit is laminated on a polycarbonate resin sheet, and a hard coat layer is further laminated as desired.

  Since the polycarbonate resin sheet is excellent in transparency, heat resistance, and mechanical strength, it is used for displays of OA / electronic devices, touch panels, and the like. However, since the polycarbonate resin sheet has a soft surface and is easily scratched, the pencil hardness is only about 2B, and there is a problem that scratches once generated are conspicuous.

  In order to improve the surface characteristics, a method of laminating an acrylic resin layer on a polycarbonate resin sheet (for example, Patent Document 1), and a method of performing a hard coat treatment on the acrylic resin layer (for example, patents) are known. Literature 2-4). However, the acrylic resin layer absorbs more moisture than the polycarbonate resin layer, and the dimensional change after moisture absorption becomes larger. Therefore, a laminate in which an acrylic resin layer is provided on one side of a polycarbonate resin, and a laminate in which a hard coat layer is provided on one or both sides of a laminate, the acrylic resin layer becomes convex when exposed to high temperature and high humidity. There is a problem that warping occurs, which has an adverse effect on the machining process.

JP 2007-160892 A JP 2006-103169 A JP 2007-237700 A JP 2008-049623 A

  An object of the present invention is to provide a polycarbonate resin laminate excellent in transparency and scratch resistance and particularly suitable for display cover panels and touch panels of OA / electronic devices.

で表される構成単位（Ａ）と、下記式［２］

で表される構成単位（Ｂ）から構成され、全構成単位における構成単位（Ａ）の割合が５０〜１００モル％であり、粘度平均分子量が１．０×１０^４〜８．０×１０^４である変性ポリカーボネート樹脂を積層し、ＪＩＳ Ｋ ７３６１−１に準拠した全光線透過率が９０％以上であり、総厚みが０．１〜２．０ｍｍであるポリカーボネート樹脂積層体。 In order to solve the above problems, the present invention provides the following.
1. The following formula [1] having a thickness of 10 to 100 μm is formed on at least one surface of a polycarbonate tree sheet having a viscosity average molecular weight of 1.0 × 10 ^{4 to} 10.0 × 10 ⁴ .

And a structural unit (A) represented by the following formula [2]

The proportion of the structural unit (A) in all the structural units is 50 to 100 mol%, and the viscosity average molecular weight is 1.0 × 10 ^{4 to} 8.0 × 10 ^4. A polycarbonate resin laminate in which the modified polycarbonate resin is laminated, the total light transmittance according to JIS K 7361-1 is 90% or more, and the total thickness is 0.1 to 2.0 mm.

2. 2. The polycarbonate resin laminate according to item 1, wherein the haze value in accordance with JIS K 7136 is 0.5% or less.
3 . 2. The polycarbonate resin laminate according to 1 above, wherein a hard coat layer is laminated on the modified polycarbonate resin layer.
4 . 4. The polycarbonate resin laminate according to 3 above, wherein the hard coat layer is made of an ultraviolet curable paint.
5 . 4. The polycarbonate resin laminate according to item 3, wherein the hard coat layer has a thickness of 1 to 20 μm.
6 . 2. The polycarbonate resin laminate according to item 1 above, containing 0.001 to 0.2 parts by weight of a phosphorus-based heat stabilizer with respect to 100 parts by weight of the modified polycarbonate resin.
7 . 2. The polycarbonate resin laminate according to item 1, which contains 0.005 to 2.0 parts by weight of a release agent with respect to 100 parts by weight of the modified polycarbonate resin.
8 . 2. The polycarbonate resin laminate according to item 1, which is used as a display cover panel or a touch panel.

  Since the polycarbonate resin laminate obtained by the present invention has transparency and scratch resistance, it is particularly useful for display cover panels of mobile devices including mobile phones and smartphones.

Hereinafter, the present invention will be described in detail.
<Polycarbonate resin>
The polycarbonate resin used for the polycarbonate resin sheet of the present invention is an aromatic polycarbonate resin produced by reacting a dihydric phenol and a carbonate precursor by a solution method or a melting method. 2-bis (4-hydroxyphenyl) propane (commonly called bisphenol A), 1,1-bis (4-hydroxyphenyl) ethane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 2,2-bis (4- Hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) sulfone, etc. It is done. A preferred dihydric phenol is a bis (4-hydroxyphenyl) alkane series, and bisphenol A is particularly preferred.

Examples of the carbonate precursor include carbonyl halide, carbonate ester, haloformate, and the like, and specifically, phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and the like.
In producing the polycarbonate resin, the above dihydric phenols can be used alone or in combination of two or more thereof, and a molecular weight regulator, a branching agent, a catalyst and the like can be used as necessary.

The molecular weight of the polycarbonate resin is 1.0 × 10 ^{4 to} 10.0 × 10 ⁴ in terms of viscosity average molecular weight, preferably 1.5 × 10 ^{4 to} 4.5 × 10 ⁴ , more preferably 1. 8 × a ^{10 4 ~3.0} × ¹⁰ 4. The viscosity average molecular weight referred to in the present invention is obtained by inserting the specific viscosity (η _sp ) obtained from a solution obtained by dissolving 0.7 g of polycarbonate resin in 100 ml of methylene chloride at 20 ° C. into the following equation.
η _sp /c=[η]+0.45×[η] ² c (where [η] is the intrinsic viscosity)
[Η] = 1.23 × 10 ⁻⁴ M ^0.83
c = 0.7

  The polycarbonate resin may contain additives as required, for example, heat stabilizers (0.001 to 0.1% by weight) such as phosphites, phosphates, and phosphonates, triazoles, acetophenones, and salicylates. UV absorbers (0.1 to 0.7% by weight) such as tetrabromobisphenol A, low molecular weight polycarbonate of tetrabromobisphenol A, flame retardants such as decabromodiphenyl ether (3 to 15% by weight), colorants, fluorescence You may mix | blend a whitening agent etc.

<Polycarbonate resin sheet>
The method for producing the polycarbonate resin sheet is not particularly limited, and examples thereof include a melt extrusion method and a solution casting method (casting method). A specific method of the melt extrusion method is, for example, that a polycarbonate resin is quantitatively supplied to an extruder, heated and melted, and the molten resin is extruded in a sheet form from a tip of a T die onto a mirror surface roll, and a plurality of rolls. A method is used in which it is taken up while being cooled and cut or wound into an appropriate size when solidified. The specific method of the solution casting method is, for example, casting a solution (concentration 5% to 40%) of polycarbonate resin in methylene chloride from a T-die onto a mirror-polished stainless steel plate, and the temperature is controlled stepwise. The sheet is peeled off while passing through an oven, peeled off, the solvent is removed, and then cooled and wound.

  The thickness of the polycarbonate resin sheet is thicker than the modified polycarbonate resin layer described later, and is preferably in the range of 0.08 to 1.99 mm. The lower limit of the thickness is more preferably 0.1 mm, further preferably 0.2 mm, and particularly preferably 0.3 mm. Further, the upper limit of the thickness is more preferably 1.89 mm, further preferably 1.69 mm, and particularly preferably 1.49 mm. In addition, when it has a hard-coat layer, the upper limit of thickness is preferable 1.98 mm, 1.88 mm is more preferable, 1.68 mm is further more preferable, 1.48 mm is especially preferable.

で表される構成単位（Ａ）と、下記式［２］

で表される構成単位（Ｂ）から構成され、全構成単位における構成単位（Ａ）の割合が５０〜１００モル％である変性ポリカーボネート樹脂を使用することにより従来のポリカーボネート樹脂よりも高い耐擦傷性を発現できることが判明した。 <Modified polycarbonate resin>
The modified polycarbonate resin layer of the present invention has the following formula [1].

And a structural unit (A) represented by the following formula [2]

Scratch resistance higher than that of a conventional polycarbonate resin by using a modified polycarbonate resin that is composed of the structural unit (B) represented by the formula (B) and the proportion of the structural unit (A) in all the structural units is 50 to 100 mol%. It was found that can be expressed .

  The proportion of the structural unit (A) in all the structural units is preferably 60 mol% or more, more preferably 80 mol% or more, further preferably 90 mol% or more, and particularly preferably substantially 100%. When the molar ratio of the structural unit (A) is less than 50 mol%, the scratch resistance is insufficient, which is not preferable. As a copolymerizable dihydric phenol, the dihydric phenol used with the polycarbonate resin sheet mentioned above can be used.

In the production of the modified polycarbonate resin, a solution method or a melting method of a dihydric phenol and a carbonate precursor is used similarly to the polycarbonate resin. The molecular weight of the modified polycarbonate resin is 1.0 × 10 ^{4 to} 10.0 × 10 ⁴ in terms of viscosity average molecular weight, preferably 1.0 × 10 ^{4 to} 8.0 × 10 ⁴ , more preferably 1 .3 × a ^{10 4 ~4.5} × ¹⁰ 4, more preferably ^{1.5 × 10 4 ~3.0 × 10 4} .

  Phosphorus heat stabilizers, mold release agents, and the like are preferably used for the modified polycarbonate resin as necessary. As other additives, UV absorbers (0.1 to 0) such as triazole, acetophenone, and salicylic acid esters are used. 7 wt%), tetrabromobisphenol A, a low molecular weight polycarbonate of tetrabromobisphenol A, a flame retardant (3 to 15 wt%) such as decabromodiphenyl ether, a colorant, a fluorescent brightening agent, and the like.

  Examples of the phosphorous heat stabilizer include phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid and esters thereof. Specifically, triphenyl phosphite, tris (nonylphenyl) phosphite, tris ( 2,4-di-tert-butylphenyl) phosphite, tris (2,6-di-tert-butylphenyl) phosphite, tridecyl phosphite, trioctyl phosphite, trioctadecyl phosphite, didecyl monophenyl phosphite Phyto, dioctyl monophenyl phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, bis (2,6-di-tert-butyl-4-methylphenyl) penta Erisrito Diphosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, bis (nonylphenyl) pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol di Phosphite, distearyl pentaerythritol diphosphite, tributyl phosphate, triethyl phosphate, trimethyl phosphate, triphenyl phosphate, diphenyl monoorthoxenyl phosphate, dibutyl phosphate, dioctyl phosphate, diisopropyl phosphate, dimethyl benzenephosphonate, diethyl benzenephosphonate, Dipropyl benzenephosphonate, tetrakis (2,4-di-tert-butylphenyl) -4,4'-biphenylenediphos Knight, tetrakis (2,4-di-tert-butylphenyl) -4,3′-biphenylene diphosphonite, tetrakis (2,4-di-tert-butylphenyl) -3,3′-biphenylene diphosphonite, Examples thereof include bis (2,4-di-tert-butylphenyl) -4-phenyl-phenylphosphonite and bis (2,4-di-tert-butylphenyl) -3-phenyl-phenylphosphonite.

  Among them, tris (2,4-di-tert-butylphenyl) phosphite, tris (2,6-di-tert-butylphenyl) phosphite, tetrakis (2,4-di-tert-butylphenyl) -4 , 4′-biphenylenediphosphonite, tetrakis (2,4-di-t-butylphenyl) -4,3′-biphenylenediphosphonite, tetrakis (2,4-di-t-butylphenyl) -3,3 '-Biphenylenediphosphonite, bis (2,4-di-tert-butylphenyl) -4-phenyl-phenylphosphonite and bis (2,4-di-tert-butylphenyl) -3-phenyl-phenylphosphonite And tris (2,4-di-tert-butylphenyl) phosphite is particularly preferably used. As content of a phosphorus-type heat stabilizer, 0.001-0.2 weight part is preferable with respect to 100 weight part of modified polycarbonate resin, 0.0015-0.1 weight part is more preferable, 0.002-0 0.05 parts by weight is more preferable, and 0.002 to 0.01 parts by weight is particularly preferable.

  As a mold release agent, that whose 90 weight% or more consists of ester of alcohol and a fatty acid is preferable. Specific examples of the ester of alcohol and fatty acid include monohydric alcohol and fatty acid ester and / or partial ester or total ester of polyhydric alcohol and fatty acid. The ester of the monohydric alcohol and the fatty acid is preferably an ester of a monohydric alcohol having 1 to 20 carbon atoms and a saturated fatty acid having 10 to 30 carbon atoms. The partial ester or total ester of a polyhydric alcohol and a fatty acid is preferably a partial ester or a total ester of a polyhydric alcohol having 1 to 25 carbon atoms and a saturated fatty acid having 10 to 30 carbon atoms.

  Specific examples of the monohydric alcohol, saturated fatty acid and ester include stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, isopropyl palmitate and the like, and stearyl stearate is preferable.

  Specific examples of partial esters or total esters of polyhydric alcohol and saturated fatty acid include stearic acid monoglyceride, stearic acid diglyceride, stearic acid triglyceride, stearic acid monosorbate, behenic acid monoglyceride, pentaerythritol monostearate, pentaerythritol tetra Examples include stearate, pentaerythritol tetrapelargonate, propylene glycol monostearate, biphenyl biphenate, sorbitan monostearate, 2-ethylhexyl stearate, dipentaerythritol hexastearate and the like.

  Among these esters, stearic acid monoglyceride, stearic acid triglyceride, pentaerythritol tetrastearate, and a mixture of stearic acid triglyceride and stearyl stearate are preferably used.

The amount of the ester in the release agent is preferably 90% by weight or more, and more preferably 95% by weight or more when the release agent is 100% by weight.
As content of a mold release agent, the range of 0.005-2.0 weight part is preferable with respect to 100 weight part of modified polycarbonate resin, The range of 0.01-1.0 weight part is more preferable, 0.02 The range of -0.5 part by weight is more preferable, and the range of 0.03-0.1 part by weight is particularly preferable.

<Modified polycarbonate resin layer>
Any method may be used for laminating the modified polycarbonate resin layer on the surface of the polycarbonate resin sheet, and it is particularly preferable to use a thermocompression bonding method or a coextrusion method.
Any method can be adopted as the thermocompression bonding method. For example, a method in which a modified polycarbonate resin film and a polycarbonate resin sheet are thermocompression bonded by a laminating machine or a press machine, or a modified polycarbonate resin film is thermocompression bonded to a polycarbonate resin sheet immediately after extrusion. A method is preferred, and a method of continuously thermocompression bonding to a polycarbonate resin sheet immediately after extrusion is industrially advantageous. The thermocompression bonding conditions in this case vary depending on the thickness of the polycarbonate resin sheet or the modified polycarbonate resin film, the state of the crimping surface, etc., and cannot be specified in general, but the temperature near or above the glass transition point of the modified polycarbonate resin film, usually Glass transition point of modified polycarbonate resin film −10 ° C. to glass transition point + 150 ° C., preferably about 0.05 to 5 kg / cm ² , preferably 0.1 to 1 kg at glass transition point −5 ° C. to glass transition point + 100 ° C. Thermocompression bonding is possible by applying a pressure of about / cm ² .

  The production method of the modified polycarbonate resin film is not particularly limited, and examples thereof include a melt extrusion method and a solution casting method (casting method). A specific method of the melt extrusion method is, for example, supplying a fixed amount of a modified polycarbonate resin to an extruder, melting by heating, and extruding the molten resin from a front end portion of a T-die into a sheet-like roll onto a roll. Then, it is taken out while being cooled, and when solidified, it is cut into an appropriate size or wound up. A specific method of the solution casting method is, for example, casting a solution (concentration 5% to 40%) of a modified polycarbonate resin in methylene chloride onto a mirror-polished stainless steel plate from a T die and controlling the temperature stepwise. The film is peeled off while passing through the oven, further peeled off, the solvent removed, and then cooled and wound up.

  In the coextrusion method, the modified polycarbonate resin is melt-extruded at a glass transition point to a glass transition point of + 230 ° C., preferably at a glass transition point of + 50 ° C. to a glass transition point of + 200 ° C. by auxiliary extrusion, and the polycarbonate resin is obtained by the main extrusion. The glass transition point to the glass transition point + 230 ° C., preferably the glass transition point + 50 ° C. to the glass transition point + 200 ° C. can be melt extruded and laminated by extrusion by a known method such as a multi-manifold method or a feed block method.

  The thickness of the modified polycarbonate resin layer is in the range of 10 to 100 μm, preferably in the range of 30 to 70 μm. If it is too thin, scratches such as scratches will reach the polycarbonate resin sheet of the base material and sufficient scratch resistance will not be obtained, and if it is too thick, impact resistance will be reduced.

<Hard coat layer>
The hard coat layer is not particularly limited in material, lamination method and the like as long as it has sufficient adhesion without impairing transparency. In general, methods such as applying a curable coating that cures by heat, ultraviolet rays, electron beam, etc., physical vapor deposition, chemical vapor deposition, etc. are mentioned. Is preferred.

  The ultraviolet curable coating is not particularly limited as long as it is a composition containing an ultraviolet curable resin and a photopolymerization initiator. Examples of the ultraviolet curable resin include urethane acrylate, epoxy acrylate, polyether acrylate, polyester acrylate, glycidyl compound, alicyclic epoxy compound, and oxetane compound. As photopolymerization initiators, 1-hydroxycyclohexyl phenyl ketone, benzyl dimethyl ketal, 2-hydroxy-2-methyl-1-phenylpropane-1-one, 2-hydroxy-2-methyl-1-phenylpropane-1- ON, 2-methyl-1-[(4-methylthio) phenyl] -2-morpholinopropan-1-one, benzophenone, 4-benzoyl-4'-methylphenyl sulfide, 2,4-diethylthioxanthone and the like. . Moreover, you may add a dilution solvent, an antifoamer, a leveling agent, an antistatic agent, etc. to this composition.

  As a coating means for laminating a hard coat layer using an ultraviolet curable paint, any method such as a spray coating method, a flow coating method, a dipping method, a roll coating method or a bar coating method may be used. From the viewpoint, a roll coating method and a bar coating method are more preferable. Moreover, a hard-coat layer may be formed only on one side according to a use, or may be laminated | stacked on both surfaces.

  The thickness of the obtained hard coat layer is preferably in the range of 1 to 20 μm, more preferably in the range of 1.5 to 15 μm, and still more preferably in the range of 2 to 10 μm. When the thickness of the hard coat layer is less than 1 μm, sufficient scratch resistance cannot be obtained. When the thickness of the hard coat layer is more than 20 μm, warpage caused by curing shrinkage increases, and it is suitable for applications such as display cover panels and touch panels of OA / electronic devices. Unsuitable

<Polycarbonate resin laminate>
The polycarbonate resin laminate obtained in the present invention is a laminate excellent in transparency and scratch resistance.
The thickness of the polycarbonate resin laminate obtained in the present invention is in the range of 0.1 to 2.0 mm, and particularly in the range of 0.4 to 1.5 mm when used for a display or a touch panel of an OA device. preferable.

The transparency of the resin laminate is evaluated by a total light transmittance value and a haze value based on JIS K 7361-1 and JIS K 7136. The total light transmittance value of the resin laminate obtained in the present invention is preferably 85% or more, and more preferably 90% or more. Further, the haze value is preferably 1.0% or less, and more preferably 0.5% or less.
The scratch resistance of the resin laminate is evaluated by pencil hardness according to JIS K 5600. The scratch resistance of the resin laminate obtained in the present invention is preferably HB or more, more preferably H or more, further preferably 2H or more, and particularly preferably 4H or more.

Hereinafter, although an example is given and explained in detail, the present invention is not limited to this unless it exceeds the purpose. In addition, the performance evaluation in an Example and a comparative example followed the following method.
(1) Transparency The total light transmittance value and haze value of the resin laminate obtained in the examples were measured according to JIS K 7361-1 and JIS K 7136.
(2) Scratch resistance The pencil hardness of the resin laminate obtained in the examples was measured according to JIS K 5600 with a weight of 750 g.
(3) Adhesion of hard coat layer 11 cuts are made vertically and horizontally at 1 mm intervals in the hard coat layer to make 100 squares, and this cello tape (registered trademark) (manufactured by Nichiban Co., Ltd.) After affixing the adhesive tape), it was peeled off at a stretch in the direction of 90 °. The hard coat layer did not peel off, and the number of remaining squares was counted.

<Examples A-7 to A-12>
(Production of modified polycarbonate resin (Bis-C-PC))
A reactor equipped with a thermometer, a stirrer and a reflux condenser was charged with 3845 parts of 48% aqueous sodium hydroxide and 18182 parts of ion-exchanged water, and 2,2-bis (4-hydroxy-3-methylphenyl) was added thereto. After 3984 parts of propane and 8.37 parts of hydrosulfite were dissolved, 10567 parts of methylene chloride was added, and 2000 parts of phosgene was blown in at 15 to 25 ° C. over about 60 minutes with stirring. After completion of the phosgene blowing, 897 parts of 48% aqueous sodium hydroxide and 69.93 parts of p-tert-butylphenol were added, stirring was resumed, 5.39 parts of triethylamine was added after emulsification, and the mixture was further stirred at 28 to 33 ° C. for 1 hour. The reaction was terminated. After completion of the reaction, the product is diluted with methylene chloride, washed with water, acidified with hydrochloric acid, washed with water, and further washed with water until the conductivity of the aqueous phase becomes substantially the same as that of ion-exchanged water. Obtained.

  Next, this solution is passed through a filter having an aperture of 0.3 μm, and further dropped into warm water in a kneader with an isolation chamber having a foreign matter outlet at the bearing, and the polycarbonate resin is flaked while distilling off methylene chloride. The liquid-containing flakes were pulverized and dried to obtain a powder. Thereafter, tris (2,4-di-tert-butylphenyl) phosphite is added to the powder so as to be 0.0025% by weight, and stearic acid monoglyceride is added to 0.05% by weight. The powder was melt-kneaded while venting with a vent type twin screw extruder [KTX-46, manufactured by Kobe Steel, Ltd.], and the structural unit (A) shown in Table 1 (Examples 7 to 9) was 2,2 A modified polycarbonate resin (Bis-C-PC) which is a structural unit derived from bis (4-hydroxy-3-methylphenyl) propane was obtained.

(Manufacture of polycarbonate resin laminate)
The polycarbonate resin constituting the polycarbonate resin sheet is melted by a single screw extruder having a screw diameter of 40 mm, and the modified polycarbonate resin forming the modified polycarbonate resin layer is melted by a single screw extruder having a screw diameter of 30 mm, and then fed by a feed block method. Polycarbonate resin laminated in two layers, extruded through a T-shaped die with a set temperature of 280 ° C., cooled with a mirror-finished roll, and shown in Table 1 (Examples A-7 to A-12) The laminated body shown to Table 1 (Example A-7-A-12) which laminated | stacked the modified polycarbonate resin (said Bis-C-PC) on the single side | surface of Teijin Chemicals Ltd. brand name: Panlite was obtained. . The performance evaluation results of the obtained laminate are shown in Table 2 (Examples A-7 to A-12).

<Comparative Example A-1>
A polycarbonate sheet (manufactured by Teijin Chemicals Ltd., trade name: Panlite Sheet PC-1151) shown in Table 1 (Comparative Example A-1) was used. The performance evaluation results are shown in Table 2 (Comparative Example A-1).

<Examples B-7 to B-12>
(Manufacture of polycarbonate resin laminate)
The polycarbonate resin constituting the polycarbonate resin sheet is melted by a single screw extruder having a screw diameter of 40 mm, and the modified polycarbonate resin (Bis-C-PC) forming the modified polycarbonate resin layer is melted by a single screw extruder having a screw diameter of 30 mm. Then, the two layers are laminated by a feed block method, extruded through a T-shaped die having a set temperature of 280 ° C., and the obtained sheet is cooled by a mirror-finished roll, and Table 3 (Examples B-7 to B) -12) A modified polycarbonate resin (Bis-C-PC) was laminated on one side of a polycarbonate resin (trade name: Panlite, manufactured by Teijin Chemicals Ltd.). The resulting laminate was coated with an ultraviolet curable coating (KCR-, manufactured by Shin-Nakamura Chemical Co., Ltd.) using a metal bar coater so as to have the film thickness shown in Table 3 (Examples B-7 to B-12). 8502) was applied and then cured using an ultraviolet irradiation device so as to obtain an integrated light amount of 600 mJ / cm ² to obtain a polycarbonate resin laminate. The performance evaluation results of the obtained laminate are shown in Table 4 (Examples B-7 to B-12).

<Comparative Example B-1>
Using a metal bar coater on a polycarbonate sheet (manufactured by Teijin Chemicals Ltd., trade name: Panlite Sheet PC-1151), an ultraviolet curable coating is applied so as to have the film thickness shown in Table 3 (Comparative Example B-1). After applying (Shin-Nakamura Chemical Co., Ltd. KCR-8502), it was cured using an ultraviolet irradiation device so as to obtain an integrated light amount of 600 mJ / cm ² to obtain a polycarbonate resin laminate. The performance evaluation results of the obtained laminate are shown in Table 4 (Comparative Example B-1).

  The polycarbonate resin laminate of the present invention is useful as a display cover panel or touch panel for OA / electronic devices.

Claims (8)

The following formula [1] having a thickness of 10 to 100 μm is formed on at least one surface of a polycarbonate resin sheet having a viscosity average molecular weight of 1.0 × 10 ^{4 to} 10.0 × 10 ⁴ .

And a structural unit (A) represented by the following formula [2]

The proportion of the structural unit (A) in all the structural units is 50 to 100 mol%, and the viscosity average molecular weight is 1.0 × 10 ^{4 to} 8.0 × 10 ^4. A polycarbonate resin laminate in which the modified polycarbonate resin is laminated , the total light transmittance according to JIS K7361-1 is 90% or more, and the total thickness is 0.1 to 2.0 mm. The polycarbonate resin laminate according to claim 1, wherein a haze value in accordance with JIS K7136 is 0.5% or less.   The polycarbonate resin laminate according to claim 1, wherein a hard coat layer is laminated on the modified polycarbonate resin layer. The polycarbonate resin laminate according to claim 3, wherein the hard coat layer comprises an ultraviolet curable coating. The polycarbonate resin laminate according to claim 3 , wherein the hard coat layer has a thickness of 1 to 20 μm.   The polycarbonate resin laminate according to claim 1, comprising 0.001 to 0.2 parts by weight of a phosphorus-based heat stabilizer with respect to 100 parts by weight of the modified polycarbonate resin.   The polycarbonate resin laminate according to claim 1, comprising 0.005 to 2.0 parts by weight of a release agent with respect to 100 parts by weight of the modified polycarbonate resin.   The polycarbonate resin laminate according to claim 1, which is used as a display cover panel or a touch panel.