JP2011056678A - Laminate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminate excellent in transparency, antistatic properties and weatherability and prevented from yellowing. <P>SOLUTION: In the laminate, at least one surface of a base material formed of a transparent synthetic resin is laminated with a surface layer formed of a polycarbonate resin composition, which comprises specific amounts of a specific antistatic agent and a specific benzotriazole and/or triazine ultraviolet absorber as essential ingredients. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a laminate having excellent antistatic properties, weather resistance, transparency and thermal stability. More specifically, the present invention relates to a laminate obtained by laminating a surface layer made of a polycarbonate resin composition containing an antistatic agent having a specific structure and an ultraviolet absorber as essential components on at least one surface of a base material made of a synthetic resin.

  Polycarbonate resins are excellent in impact resistance, heat resistance, and transparency, and are widely used in various fields such as electric / electronic, optical, building materials, medical, food, and vehicles. However, products obtained from polycarbonate resin are easily charged with static electricity, and there is a possibility of dust and foreign matter adhering to the surface and failure due to static electricity.

  In order to impart antistatic performance, conductive carbon black or carbon fiber is blended with a polycarbonate resin. However, since these are black, since the color tone of the obtained antistatic polycarbonate resin is limited to black, coloring to other colors is difficult, so the range of use is extremely limited after all. There was a problem of becoming a thing.

  Also, alkane sulfonate metal salts, alkylbenzene sulfonates, etc. were generally used as antistatic agents for applications other than black, but when they are blended with polycarbonate resin, the color tone becomes white and opaque. It was not applicable.

  As for the prior art for maintaining the transparency of the polycarbonate resin and preventing the antistatic, a method of blending a phosphonium salt of sulfonic acid (JP-A-62-230835), a blend of a phosphonium salt of sulfonate and a phosphite ester. A method (Japanese Patent Laid-Open No. 1-14267) has been proposed. However, the polycarbonate resin obtained by these methods is not sufficient in antistatic property represented by the surface resistivity and half-life, and does not exhibit a stable effect with respect to dust adhesion. Further, when a large amount of sulfonic acid phosphonium salt is added to improve the antistatic performance, the polycarbonate resin is hydrolyzed, the thermal stability is lowered, and it is colored yellow (hereinafter referred to as yellowing). ) Was a fundamental problem.

JP-A-62-230835 JP-A-1-14267

  Polycarbonate resin, on the other hand, may cause deterioration such as discoloration of the resin surface when exposed to ultraviolet rays for a long time when used in outdoor applications such as building materials, lighting covers, and nameplates. What has not only the property and the antistatic property but the weather resistance is also calculated | required. In addition, since functions such as antistatic properties and weather resistance are sufficient to be expressed on or around the surface of a molded article made of polycarbonate resin, it has excellent transparency, antistatic properties, weather resistance, and thermal stability. There is a demand for a laminate using a polycarbonate resin as a surface layer. By modifying only the surface layer of the laminate as described above, there is an advantage that an expensive ultraviolet absorber and an antistatic agent are generally localized at a required site and function effectively.

  An object of this invention is to provide the laminated body which was excellent in transparency, antistatic property, and weather resistance, and suppressed yellowing.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors surprisingly have a synergistic effect in antistatic performance by using a conventional organic sulfonic acid phosphonium salt in combination with a specific fluorine-containing phosphonium salt. In addition, a polycarbonate resin composition having weather resistance can be obtained by blending a specific ultraviolet absorber, and excellent transparency and charging can be obtained by using this as a surface material of a laminate. It has been found that a laminate having a preventive property and weather resistance and suppressing yellowing can be obtained, and the present invention has been completed.

That is, the present invention provides a laminate in which a surface layer composed of a polycarbonate resin composition containing an antistatic agent and an ultraviolet absorber as essential components is laminated on at least one surface of a substrate composed of a transparent synthetic resin.
The antistatic agent for the surface layer is a compound (A) represented by the following formula (1) and the following formula (2)
And the content of the antistatic agent is 100 parts by weight of the polycarbonate resin used for the surface layer, or 0.5 to 10 parts by weight of the compound (A) Compound (B) is 0.1 to 5.0 parts by weight, and the ultraviolet absorber is a benzotriazole-based and / or triazine-based ultraviolet absorber, and the content of the ultraviolet absorber is 3 to 10 parts by weight per 100 parts by weight of the polycarbonate resin used for the surface layer,
The laminated body characterized by this is provided.
Formula (1):

（式中、Ｒ^１は炭素数１〜４０のアルキル基又はアリール基であり、Ｒ^２〜Ｒ^５は水素原子、炭素数１〜１０のアルキル基又はアリール基であり、これらは同じであっても異なっていてもよい。）

(In the formula, R ¹ is an alkyl group or aryl group having 1 to 40 carbon atoms, R ^{2 to} R ⁵ are a hydrogen atom, an alkyl group or aryl group having 1 to 10 carbon atoms, and these are the same. May be different.)

Formula (2):
[(R ⁶ ) ₃ R ⁷ P] ^+. (R ⁸ SO ₂ ) (R ⁹ SO ₂ ) N ⁻
(Wherein R ⁶ represents an alkyl group having 1 to 4 carbon atoms, R ⁷ represents an alkyl group having ⁸ to 20 carbon atoms, and R ⁸ and R ⁹ may be the same or different, and (The perfluoroalkyl group of Formula 1-4 is shown.)

  The laminate of the present invention is excellent in transparency, antistatic properties and weather resistance, and is suppressed in yellowing, so that it is a molded product for outdoor use that is not suitable for dust adhesion, such as an illumination cover, an exterior, a car, etc. It is suitably used for applications such as ports.

  Examples of the transparent synthetic resin used as the base material of the present invention include transparent thermoplastic resins such as a polycarbonate resin and a polymethyl methacrylate resin. In particular, considering the recycling of the laminate, a polycarbonate resin is used for the surface layer. Therefore, it is preferable to use the polycarbonate resin as the base material.

  The polycarbonate resin used in the surface layer or in some cases of the present invention is a phosgene method in which various dihydroxydiaryl compounds and phosgene are reacted, or transesterification in which a dihydroxydiaryl compound is reacted with a carbonate such as diphenyl carbonate. A typical example of the polymer obtained by the method is a polycarbonate resin produced from 2,2-bis (4-hydroxyphenyl) propane (bisphenol A).

  Examples of the dihydroxydiaryl compound include bisphenol 4-, bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) butane, 2, 2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 2,2-bis (4-hydroxyphenyl-3-methylphenyl) propane, 1,1-bis (4-hydroxy-3) -Tert-butylphenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, 2,2-bis ( Bis (hydroxyaryl) alkanes such as 4-hydroxy-3,5-dichlorophenyl) propane, 1,1- (4-hydroxyphenyl) cyclopentane, bis (hydroxyaryl) cycloalkanes such as 1,1-bis (4-hydroxyphenyl) cyclohexane, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3 Dihydroxy diaryl ethers such as 3,3'-dimethyldiphenyl ether, dihydroxy diaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3 ' Dihydroxy diaryl sulfoxides such as dimethyldiphenyl sulfoxide, dihydroxy diary such as 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone Sulfone, and the like. These are used individually or in mixture of 2 or more types. In addition to these, piperazine, dipiperidyl hydroquinone, resorcin, 4,4'-dihydroxydiphenyl, and the like may be mixed and used.

  Furthermore, the above dihydroxyaryl compound and a trivalent or higher valent phenol compound as shown below may be used in combination. The trivalent or higher phenols include phloroglucin, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -heptene, 2,4,6-dimethyl-2,4,6-tri- (4 -Hydroxyphenyl) -heptane, 1,3,5-tri- (4-hydroxyphenyl) -benzol, 1,1,1-tri- (4-hydroxyphenyl) -ethane and 2,2-bis- [4 4- (4,4'-dihydroxydiphenyl) -cyclohexyl] -propane and the like.

  The viscosity average molecular weight of the polycarbonate resin is usually 10,000 to 100,000, preferably 15,000 to 35,000, and more preferably 17,000 to 28,000. In producing such a polycarbonate resin, a molecular weight regulator, a catalyst and the like can be used as necessary.

The compound (A) as an antistatic agent used in the present invention is an organic sulfonic acid phosphonium salt having a chemical structure represented by the following formula (1).
Formula (1):

(In the formula, R ¹ is an alkyl group or aryl group having 1 to 40 carbon atoms, R ^{2 to} R ⁵ are a hydrogen atom, an alkyl group or aryl group having 1 to 10 carbon atoms, and these are the same. May be different.)

Among the compounds (A) represented by the above formula (1), an organic sulfonic acid phosphonium salt having a chemical structure represented by the following formula (3) can be preferably used.
Formula (3):

  The compounding quantity of the compound (A) as an antistatic agent used by this invention is 0.5-10 weight part per 100 weight part of polycarbonate resin used for a surface layer. If the blending amount is less than 0.5 parts by weight, the antistatic property is inferior, and if it exceeds 10 parts by weight, the degree of yellowing increases due to the decrease in thermal stability, which is not preferable. More preferably, it is 0.5-7.0 weight part, More preferably, it is the range of 0.6-1.5 weight part.

The compound (B) as an antistatic agent used in the present invention is a fluorine-containing organic phosphonium salt having a chemical structure represented by the following formula (2).
Formula (2):
[(R ⁶ ) ₃ R ⁷ P] ^+. (R ⁸ SO ₂ ) (R ⁹ SO ₂ ) N ⁻
(Wherein R ⁶ represents an alkyl group having 1 to 4 carbon atoms, R ⁷ represents an alkyl group having ⁸ to 20 carbon atoms, and R ⁸ and R ⁹ may be the same or different, and (The perfluoroalkyl group of Formula 1-4 is shown.)

Among the compounds (C) represented by the above formula (2), 1,1,1-tributyl-1-dodecylphosphonium = bis (trifluoromethanesulfonyl) imide represented by the following formula (4) can be preferably used. .
Formula (4):

  The compounding quantity of the compound (B) as an antistatic agent used by this invention is 0.1-5 weight part per 100 weight part of polycarbonate resin used for a surface layer. If the blending amount is less than 0.1 parts by weight, the antistatic property is inferior, and if it exceeds 5 parts by weight, the transparency is lowered, which is not preferable. More preferably, it is 0.2-3.0 weight part, More preferably, it is the range of 0.3-1.0 weight part.

  In particular, when 100 parts by weight of the polycarbonate resin used for the surface layer is combined with 0.6 to 1.5 parts by weight of the compound (A) and 0.3 to 1.0 parts by weight of the compound (B), It is preferable because a remarkable synergistic effect is exhibited in the antistatic performance, and excellent thermal stability and transparency can be exhibited.

The ultraviolet absorber used in the present invention is a benzotriazole-based and / or triazine-based ultraviolet absorber, and includes compounds represented by the following formula (5) and / or the following formula (6), respectively. These may be used in combination.
Formula (5):

Formula (6):

  In particular, the triazine-based ultraviolet absorber is preferably used in combination with the compounds (A) and (B) as the antistatic agent of the present invention because the antistatic performance is further improved.

  In addition, when an antistatic agent is added to the polycarbonate resin, the mold and roll may be contaminated by the heat history during compounding, granulation processing or molding processing. The molecular weight is preferably 400 or more. These are available as ADEKA LA31 and Ciba Specialty Chemicals TINUVIN1577FF, respectively.

  The compounding quantity of a ultraviolet absorber is 3-10 weight part per 100 weight part of polycarbonate resin used for a surface layer. If the blending amount is less than 3 parts by weight, the weather resistance is inferior, and if it exceeds 10 parts by weight, the thermal stability is lowered, which is not preferable. More preferably, it is 4-9 weight part, More preferably, it is the range of 5-8 weight part.

  In the polycarbonate resin composition used for the surface layer of the present invention, various known additives, polymers and the like can be added as required depending on the performance required in addition to the antistatic property. For example, in order to obtain a vivid color tone, a benzoxazole-based fluorescent brightener and a combination thereof may be added.

  The polycarbonate resin composition used for the surface layer of the present invention includes known additives other than those described above, such as phenol-based or phosphorus-based heat stabilizers [2,6-di-t-butyl-4-methylphenol, 2- (1-methylcyclohexyl) -4,6-dimethylphenol, 4,4'-thiobis- (6-tert-butyl-3-methylphenol), 2,2-methylenebis- (4-ethyl-6-tert-methyl) Phenol), n-octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, tris (2,4-di-t-butylphenyl) phosphite, 4,4'-biphenylenediphosphine Acid tetrakis- (2,4-di-t-butylphenyl), etc.], lubricant [paraffin wax, n-butyl stearate, synthetic beeswax, natural beeswax, glycerin No ester, montanic acid wax, polyethylene wax, pentaerythritol tetrastearate, etc.], colorant [eg titanium oxide, carbon black, dye], filler [calcium carbonate, clay, silica, glass fiber, glass sphere, glass flake, carbon Fiber, talc, mica, various whiskers, etc.], fluidity improver, spreading agent [epoxidized soybean oil, liquid paraffin, etc.], and other thermoplastic resins and various impact modifiers (polybutadiene, polyacrylic acid) A rubber-reinforced resin obtained by graft polymerization of a compound such as methacrylic acid ester, styrene, acrylonitrile, etc. to a rubber such as an ester or ethylene / propylene rubber may be added as necessary.

  There is no restriction | limiting in any embodiment and order of the polycarbonate resin used for the surface layer of this invention. For example, the polycarbonate resin, the compound (A), the compound (B) and the ultraviolet absorber are weighed in arbitrary blending amounts and mixed together by a tumbler, a riboblender, a high-speed mixer, etc. A method of melt-kneading and pelletizing using a twin-screw extruder, or a method of weighing each or all of individual components separately, putting them into a extruder from a plurality of feeders, and melt-mixing; The polycarbonate resin and (A), (B) and / or UV absorber are blended at a high concentration, once melt-mixed and pelletized to obtain a master batch, and then the master batch and the polycarbonate resin are mixed at a desired ratio. It can also be mixed. Then, when these components are melt-mixed, arbitrary conditions such as the position to be fed into the extruder, the extrusion temperature, the screw rotation speed, and the supply amount can be selected and pelletized.

  In the production method of the laminate of the present invention, the resin composition used for the substrate and the surface layer is melt-kneaded using separate single-screw or twin-screw extruders, and the respective melts are co-extruded dies. Examples include a so-called coextrusion method, a method of laminating the base material and the surface layer plate-shaped product by hot pressing, a method of laminating the surface layer into a film, and the like. It is done. Among these, the coextrusion method is preferably used because it is excellent in terms of production efficiency.

  The thickness of the surface layer and the base material is not particularly limited, but considering the rigidity and weather resistance of the obtained laminate and the antistatic performance, etc., 1 to 7 mm as the base material and the surface layer material 10-500 micrometers is preferable, More preferably, it is the range of 1.5-5.0 mm as a base material, and 20-200 micrometers as a surface layer material.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples. Unless otherwise specified, “%” and “part” in the examples are based on weight standards.

The raw materials used are as follows.
Polycarbonate resin used for the substrate:
Caliber 200-13 manufactured by Sumitomo Dow
(Viscosity average molecular weight: 21500)
Polycarbonate resin used for the surface layer:
Caliber 200-3 manufactured by Sumitomo Dow
(Viscosity average molecular weight: 28000, hereinafter abbreviated as PC)
Compound (A):
S-418, Takemoto Yushi Co., Ltd.
Alkylbenzenesulfonic acid phosphonium salt (hereinafter abbreviated as antistatic agent A)
Compound (B):
1,1,1-tributyl-1-dodecylphosphonium = bis (trifluoromethanesulfonyl) imide (hereinafter abbreviated as antistatic agent B)

The antistatic agent C was produced by the following method.
After mixing 1,1,1-tributyl-1-dodecylphosphonium bromide 24.07 g (0.0533 mol, Tokyo Chemical Industry Co., Ltd. reagent), methylene chloride 34.2 g and ion-exchanged water 34.2 g, bis (trifluoro 16.07 g (0.0560 mol) of lithium (romethanesulfonyl) imidate was added and stirred at room temperature for 4 hours. After completion of the reaction, the obtained organic layer was separated by a liquid separation operation and washed three times with 34.2 g of ion-exchanged water. The organic layer was concentrated to remove methylene chloride, and then the residue was dried under reduced pressure to obtain 32.0 g of 1,1,1-tributyl-1-dodecylphosphonium bis (trifluoromethanesulfonyl) imide (yield 92 .2%).

UV absorber:
TINUVIN1577 manufactured by Ciba Specialty Chemicals
Triazine UV absorber (hereinafter abbreviated as UVA-1)
LA-31 made by ADEKA
Polymer type benzotriazole ultraviolet absorber (hereinafter abbreviated as UVA-2)

The extruder used was as follows.
Melt-kneading extruder for surface resin composition:
Nippon Steel Works TEX30α twin screw extruder (L / D = 42, Φ = 30mm)
Extruder for coextrusion:
Extruder for substrate: VS40 single screw extruder manufactured by Tanabe Plastics
(L / D = 32, 40Φ)
Surface layer extruder: PEX-25-24 type single screw extruder manufactured by Plastic Giken Co., Ltd.
(L / D = 24, 25Φ)

(Creation of resin composition pellet for surface layer)
Each of the above-mentioned various raw materials was put into a tumbler at the blending ratio shown in Tables 1-2, and after dry mixing for 10 minutes, using a twin-screw extruder (TEX30α manufactured by Nippon Steel Works) to a melting temperature of 260 ° C. And kneaded to obtain pellets.

(Processing by coextrusion method)
The obtained pellets of the resin composition for the surface layer were pre-dried using a hot air circulation dryer (PERFECT OVEN PV-330 manufactured by Tabai Co., Ltd.) under a drying condition of 125 ° C. for 2 hours. In addition, the polycarbonate resin for the substrate was pre-dried under the same conditions.
The pre-dried polycarbonate resin pellets were melt kneaded at 260 ° C. using a substrate extruder (VS40 single screw extruder manufactured by Tanabe Plastics Co., Ltd.). Feed to substrate feed block. At the same time, the pre-dried pellets of the resin composition for the surface layer are melt-kneaded at 260 ° C. using a surface layer extruder (PEX-25-24 type single screw extruder). It was fed to a feed to obtain a laminate by coextrusion. In addition, the thickness of the surface layer and the base material was set to 100 μm and 1.9 mm, respectively.

Various evaluation items and measurement methods in the present invention will be described.
1. Surface resistivity (Rs):
The obtained laminate was cut into a 3 cm × 3 cm thickness of 2.0 mm to prepare a test piece.
The obtained test piece was conditioned for 24 hours under the conditions of 23 ° C. and 50% relative humidity, and then using a superinsulator (SME 8311 manufactured by Sicid Electrostatic Co., Ltd.) with a measurement voltage of 500 V and a sampling time of 60 seconds. The surface resistivity was measured. The case where the surface specific resistance Rs was less than 1 × 10 ¹⁴ was regarded as acceptable.
2. Half-life:
Using the obtained test piece, the half-life was measured with a Static Honest Meter H-0110 manufactured by Sicid. First, an electric charge of 10 KV is continuously applied until the withstand voltage of the test piece becomes constant. Thereafter, the charge was stopped, the decay of the charged voltage was observed, and the time until the initial charged voltage was halved was measured to determine the half-life. A half-life of 10 seconds or less was accepted.
3. Total light transmittance:
Using the obtained test piece, the total light transmittance was measured in accordance with JIS K7361. 70% or more was accepted.
4). Yellowness index (YI):
Using the obtained test piece, the yellowness index (YI) was measured according to ASTM D-1925. 10 or less was regarded as acceptable.
5. Weatherability:
The obtained test piece was placed in an accelerated weathering tester sunshine super long life weather meter (WELSUNHCH-B type manufactured by Suga Test Instruments Co., Ltd.) and irradiated for 600 hours. Thereafter, the yellowness index (YI) of the test piece before and after irradiation was measured using a spectrophotometer (CMS-35SP manufactured by Murakami Color Research Laboratory). ΔYI (difference in YI) represents the degree of yolk before and after irradiation, and the smaller the ΔYI, the smaller the color change and the better the light resistance. As an evaluation criterion for ΔYI, a value of ΔYI of less than 3.0 was accepted (◯), and a value of 3.0 or more was rejected (x).

  As shown in Tables 1 and 2, when the polycarbonate resin composition for the surface layer satisfies the requirements of the present invention (Examples 1 to 9), all the required performance including the surface resistivity is required. Was satisfied. As shown in Examples 1 to 3, Example 5 and Examples 7 to 9, excellent antistatic properties even in a polycarbonate resin composition in a region where the total amount of the antistatic agents (A) and (B) is relatively small Showed the effect.

In Example 4, 1.5 parts of the antistatic agent (A) and 0.5 part of the antistatic agent (B) were used in combination, and the surface resistivity was on the order of 10 ¹² Ω. On the other hand, in the example in which only 1.5 part of the antistatic agent (A) was blended alone (Comparative Example 1) and in the example in which only 0.5 part of the antistatic agent (B) was blended alone (Comparative Example 2), the surface resistivity was Also showed 10 ¹⁵ Ω or more. As can be seen from this example, a synergistic effect in the antistatic performance was obtained by using the antistatic agent (A) and the antistatic agent (B) in combination.

Example 3 is an example in which 0.6 part of the antistatic agent (A), 0.5 part of the antistatic agent (B) and 5.0 parts of UVA-1 were added, and the surface specific resistance was 10 ¹² Ω. Showed the order. On the other hand, in the example (Example 8) in which the ultraviolet absorber was changed to UVA-2 with the same formulation, the surface resistivity was 10 ¹³ Ω level. As can be seen from this example, a synergistic effect in antistatic performance was obtained by using the antistatic agent (A), the antistatic agent (B) and UVA-1 in combination.

On the other hand, as shown in Tables 3 and 4, when the configuration of the present invention was not satisfied, each case had some drawbacks.
Comparative Example 1 was a case where no antistatic agent (B) was blended, resulting in poor surface resistivity and half-life.
In Comparative Example 2, the antistatic agent (A) was not blended, and the surface resistivity and half-life were inferior.
Comparative Example 3 was a case where the blending amount of the antistatic agent (A) was less than the specified amount, resulting in poor surface resistivity and half-life.
Comparative Example 4 was a case where the blending amount of the antistatic agent (A) was larger than the specified amount, and YI was inferior.
Comparative Example 5 was a case where the blending amount of the antistatic agent (B) was less than the prescribed amount, resulting in poor surface resistivity and half-life.
Comparative Example 6 was a case where the blending amount of the antistatic agent (B) was larger than the specified amount, and the transmittance and YI were inferior.
The comparative example 7 is a case where the compounding quantity of a ultraviolet absorber is less than a regulation amount, and resulted in inferior weather resistance.
The comparative example 8 is a case where the compounding quantity of a ultraviolet absorber is more than a regulation amount, and resulted in inferior YI.

Claims (7)

In a laminate formed by laminating a surface layer made of a polycarbonate resin composition containing an antistatic agent and an ultraviolet absorber as essential components on at least one side of a substrate made of a transparent synthetic resin,
The antistatic agent for the surface layer is a compound (A) represented by the following formula (1) and the following formula (2)
And the content of the antistatic agent is 100 parts by weight of the polycarbonate resin used for the surface layer, or 0.5 to 10 parts by weight of the compound (A) Compound (B) is 0.1 to 5.0 parts by weight, and the ultraviolet absorber is a benzotriazole-based and / or triazine-based ultraviolet absorber, and the content of the ultraviolet absorber is 3 to 10 parts by weight per 100 parts by weight of the polycarbonate resin used for the surface layer,
A laminate characterized by the above.
Formula (1):

(In the formula, R ¹ is an alkyl group or aryl group having 1 to 40 carbon atoms, R ^{2 to} R ⁵ are a hydrogen atom, an alkyl group or aryl group having 1 to 10 carbon atoms, and these are the same. May be different.)
Formula (2):
[(R ⁶ ) ₃ R ⁷ P] ^+. (R ⁸ SO ₂ ) (R ⁹ SO ₂ ) N ⁻
(Wherein R ⁶ represents an alkyl group having 1 to 4 carbon atoms, R ⁷ represents an alkyl group having ⁸ to 20 carbon atoms, and R ⁸ and R ⁹ may be the same or different, and (The perfluoroalkyl group of Formula 1-4 is shown.) The laminate according to claim 1, wherein the compound (A) is an alkylbenzenesulfonic acid phosphonium salt represented by the following formula (3).
Formula (3):

The laminate according to claim 1, wherein the compound (B) is 1,1,1-tributyl-1-dodecylphosphonium = bis (trifluoromethanesulfonyl) imide represented by the following formula (4).
Formula (4):

The compounding amount of the compound (A) is 0.6 to 1.5 parts by weight, and the compounding amount of the compound (B) is 0.3 to 1.0 part by weight (respectively, polycarbonate resins used for the surface layer) The laminate according to claim 1, which is per 100 parts by weight. The laminate according to claim 1, wherein the benzotriazole-based ultraviolet absorber is a compound represented by the following formula (5).
Formula (5):

The laminate according to claim 1, wherein the triazine-based ultraviolet absorber is a compound represented by the following formula (6).
Formula (6):

The laminate according to claim 1, wherein the transparent synthetic resin of the base material is a polycarbonate resin.