JP5076336B2 - Molded body with heat ray shielding ability - Google Patents

Molded body with heat ray shielding ability Download PDF

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JP5076336B2
JP5076336B2 JP2006065928A JP2006065928A JP5076336B2 JP 5076336 B2 JP5076336 B2 JP 5076336B2 JP 2006065928 A JP2006065928 A JP 2006065928A JP 2006065928 A JP2006065928 A JP 2006065928A JP 5076336 B2 JP5076336 B2 JP 5076336B2
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heat ray
ray shielding
acid
polycarbonate resin
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JP2006307171A (en
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博 中野
恵美 東泉
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三菱エンジニアリングプラスチックス株式会社
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The present invention has a low solar transmittance and a sufficient heat ray shielding function, and is particularly low in haze and excellent in transparency, and further excellent in mechanical strength and fusion heat stability. shaped body provided with a heat ray shielding ability with suitable polycarbonate resin composition on a window glass of an automobile related.

Near-infrared rays that penetrate through window glass of general buildings and window glass of automobiles and enter the room are a cause of excessively increasing the indoor temperature. In order to prevent this, there is a strong provision of a heat ray-shielding resin composition having a low solar transmittance and a sufficient heat ray shielding function, and particularly having a low haze and excellent transparency, and a molded article having a heat ray shielding ability. It has been demanded. In response to such requirements, Patent Documents 1 and 2 disclose heat ray shielding materials in which a phthalocyanine compound is blended with a polycarbonate resin, a poly (meth) acrylic resin, a polyethylene resin, a polyester resin, a polystyrene resin, or a vinyl chloride resin. However, in order to give sufficient heat ray shielding properties, a large amount of phthalocyanine compound has to be blended. When a large amount is blended, the haze is increased, the transparency is lowered, and the weather resistance is insufficient.
Patent Documents 3 and 4 also disclose a heat ray shielding resin plate in which a heat ray reflective film on which a metal or a metal oxide is deposited is laminated on a transparent resin plate. However, the heat ray reflective film is expensive and cumbersome lamination. There was a process and it was a thing with low practicality.
Further, Patent Document 5 discloses at least one selected from a polycarbonate resin, a poly (meth) acrylate resin, a saturated polyester resin, a cyclic olefin resin, a polyimide resin, a polyether sulfone resin, and a fluorine resin. Although a heat ray shielding resin molded body in which hexaboride is blended with a kind of thermoplastic resin is disclosed, it has a high haze and insufficient transparency, and can be satisfied as a window glass of a general building or a window glass of an automobile. It was not a thing.
Japanese Patent Laid-Open No. 06-240146 Japanese Patent Application Laid-Open No. 06-264050 Japanese Patent Laid-Open No. 10-146919 Japanese Patent Laid-Open No. 2001-179887 JP 2004-162020 A

The object of the present invention is to have particularly low haze, excellent transparency, low solar transmittance and sufficient heat ray shielding (particularly a function of being transparent to visible light and selectively shielding infrared rays), and An object of the present invention is to provide a molded article having heat ray shielding ability using a polycarbonate resin composition which is excellent in mechanical strength and melt heat stability and is suitable for window glass for general buildings, window glass for automobiles and the like.

As a result of intensive studies, the present inventors have found that the above problems can be solved by blending a small amount of boride into an aromatic polycarbonate resin having a specific terminal hydroxyl group concentration or produced by a specific method. It was. That is, the aromatic polycarbonate resin having a terminal hydroxyl group concentration in the range of 100 to 1800, particularly represented by the following formulas (2) and (3) with respect to the normal structural unit moles represented by the following formula (1). The percentage (mol%) of the total number of moles of the different structural units is 0.1 to 0.5 mol%,
(In the formula, X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, or It is a divalent group selected from the group consisting of —O—, —S—, —CO—, —SO— and —SO 2 —.
100 parts by weight of an aromatic polycarbonate resin produced by transesterification from an aromatic dihydrooxy compound and a carbonic acid diester, La, Ce, Pr, Nd, Tb, Dy, Ho, Y, Sm, Eu, Er, Tm , Yb, Lu, Sr and Ca, a molded body having a heat ray shielding ability formed by molding a polycarbonate resin composition containing 0.0001 to 5 parts by weight of a boride of at least one metal selected from the group consisting of However , it has a low haze, excellent transparency, low solar radiation transmittance, and sufficient heat ray shielding (particularly a function that is transparent to visible light and selectively shields infrared rays), and further has mechanical strength and also excellent in melt heat stability, it has a plate-like portion of the thickness of 3 to 10 mm, and, in the plate-like portion, the haze of 3mm thickness is not more than 2.1%, a solar radiation transmittance of 70% or more It found that a molded body having a heat ray shielding capability is, and completed the present invention.

A molded article having a heat ray shielding ability using the polycarbonate resin composition of the present invention has a particularly low haze and excellent transparency, and a low solar radiation transmittance and a sufficient heat ray shielding property (particularly a visible light transmissive property). It has a function of selectively shielding infrared rays, and is also excellent in mechanical strength and melting heat stability, so it can be used for roofing materials for general buildings and automobiles, arcades and carports, and infrared cut filters. It can be used as an optical material such as an agricultural film.

Aromatic polycarbonate resin The aromatic polycarbonate resin used in the present invention is an aromatic polycarbonate resin having a terminal hydroxyl group concentration of 100 to 1800 ppm (weight basis), preferably a terminal hydroxyl group concentration of 300 to 1500 ppm, particularly preferably. By using this for the present invention, which is an aromatic polycarbonate resin having a terminal hydroxyl group concentration of 400 to 1200 ppm, a polycarbonate resin composition having particularly low haze and excellent transparency can be obtained. The preparation of aromatic polycarbonate resins, an interfacial polymerization method, pyridine method, and a transesterification method aromatic polycarbonate resins used in the present invention, the aromatic dihydroxy compound and a carbonic acid diester as a raw material, transesterification It is produced by transesterification and polymerization in the molten state in the presence of a catalyst. Hereinafter, the aromatic polycarbonate resin used in the present invention will be specifically described.

  Typical examples of the aromatic dihydroxy compound that is one of the raw materials of the aromatic polycarbonate resin used in the present invention include, for example, bis (4-hydroxyphenyl) methane and 2,2-bis (4-hydroxyphenyl). Propane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 2,2-bis (4-hydroxy-3-tert-butylphenyl) propane, 2,2-bis (4-hydroxy-3, 5-dimethylphenyl) propane, 2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, 4,4-bis (4-hydroxyphenyl) heptane, 1,1-bis (4-hydroxyphenyl) Cyclohexane, 4,4′-dihydroxybiphenyl, 3,3 ′, 5,5′-tetramethyl-4,4′-dihydroxybiphenyl Bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) ether, bis (4-hydroxyphenyl) ketone. These aromatic dihydroxy compounds can be used alone or in admixture of two or more. Furthermore, polyvalent phenols having three or more hydroxy groups in the molecule such as 1,1,1-tris (4-hydroxylphenyl) ethane (THPE), 1,3,5-tris (4-hydroxyphenyl) benzene Etc. can be used together in small amounts as a branching agent. Among these aromatic dihydroxy compounds, 2,2-bis (4-hydroxyphenyl) propane (hereinafter also referred to as “bisphenol A” and sometimes abbreviated as “BPA”) is preferable.

Carbonic acid diesters, which are other raw materials for aromatic polycarbonate resins used in the present invention, include, for example, diaryl carbonates such as diphenyl carbonate and ditolyl carbonate, dimethyl carbonate, diethyl carbonate, and di-tert-butyl. Examples thereof include dialkyl carbonates typified by carbonates. These carbonic acid diesters can be used alone or in admixture of two or more. Among these, diphenyl carbonate (hereinafter sometimes abbreviated as “DPC”) and substituted diphenyl carbonate are preferable.

  Moreover, said carbonic acid diester may substitute the quantity of the 50 mol% or less preferably 30 mol% or less with the dicarboxylic acid or dicarboxylic acid ester preferably. Representative dicarboxylic acids or dicarboxylic acid esters include terephthalic acid, isophthalic acid, diphenyl terephthalate, and diphenyl isophthalate. When substituted with such a dicarboxylic acid or dicarboxylic acid ester, a polyester carbonate is obtained.

The aromatic polycarbonate resin used in the present invention has a terminal hydroxyl group concentration of 100 to 1800 ppm (weight basis), preferably 300 to 1500 ppm, more preferably 400 to 1200 ppm. In order to obtain such an aromatic polycarbonate resin, these carbonic acid diesters (including the above-mentioned substituted dicarboxylic acid or dicarboxylic acid ester; the same shall apply hereinafter) are usually used in excess relative to the aromatic dihydroxy compound. That is, the carbonic acid diester is used in a molar ratio within the range of 1.001 to 1.3, preferably 1.01 to 1.2 with respect to the aromatic dihydroxy compound. When the molar ratio is less than 1.001, the terminal hydroxyl group of the produced polycarbonate increases, and particularly when it exceeds 1800 ppm, the thermal stability and hydrolysis resistance deteriorate. Moreover, when the molar ratio is larger than 1.3, the terminal hydroxyl group of the aromatic polycarbonate resin decreases, but the rate of the transesterification reaction decreases under the same conditions, making it difficult to produce polycarbonate polymers and oligomers having a desired molecular weight. Further, if the terminal hydroxyl group concentration is less than 100 ppm, the haze of the polycarbonate resin composition becomes high and the transparency is lowered, which is not preferable. The unit of the terminal hydroxyl group concentration is the weight of the terminal hydroxyl group expressed in ppm relative to the weight of the aromatic polycarbonate resin. The method for measuring the terminal hydroxyl group is not particularly limited, but the titanium tetrachloride / acetic acid method (the method described in Macromol. Chem. 88 215 (1965)) is common.

Although it is not certain why the transesterification aromatic polycarbonate resin has good haze, the heterogeneous skeletal structure produced by the transesterification reaction has functional groups such as OH groups and COOH groups in the structural units. It is presumed that these functional groups have a similar action to the terminal OH group. In the present invention, the percentage (mol%) of the total number of moles of different structural units represented by the following formulas (2) and (3) with respect to the number of moles of the normal structural unit represented by the following formula (1): the amount of heterogeneous backbone structure (hereinafter. referred to as "heterologous amount") used for displaying, heterologous amount of a transesterification method aromatic polycarbonate resin, 0. 1 to 0.5 mol%. If the amount of the heterogeneous structure is too small, the effect of improving haze is insufficient, and if it is too large, gel formation and hue deterioration due to a crosslinking reaction are unfavorable.

(In the formula, X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, or It is a divalent group selected from the group consisting of —O—, —S—, —CO—, —SO— and —SO 2 —.

  The heterogeneous skeleton structure is analyzed by dissolving an aromatic polycarbonate resin in methylene chloride, hydrolyzing at room temperature with a mixed solution of sodium methoxide methanol solution and pure water, and using a liquid chromatography method with a detection wavelength of 280 nm. By UV detector. Quantification is determined from the extinction coefficient of each component. As a simple method, it can also be calculated from the ratio of the peak area of each component to the peak area of bisphenol A.

When an aromatic polycarbonate resin is produced by subjecting an aromatic dihydroxy compound and a carbonic acid diester to a transesterification reaction in a molten state, a transesterification catalyst is usually used. In the production of the aromatic polycarbonate resin used in the present invention, the type of transesterification catalyst to be used is not limited, but in general, alkali metal compounds, alkaline earth metal compounds, basic boron compounds, basic phosphorus compounds Basic compounds such as basic ammonium compounds and amine compounds are used. These may be used alone or in combination of two or more. The catalyst is used in an amount of 0.05 to 200 μmol, preferably 0.08 to 10 μmol, more preferably 0.1 to 2 μmol, per 1 mol of the aromatic dihydroxy compound. If the amount of the catalyst used is less than the above amount, the polymerization activity necessary for producing an aromatic polycarbonate resin having a desired molecular weight cannot be obtained, and if it is more than this amount, the polymer hue tends to deteriorate.
The transesterification catalyst is usually preferably used in the form of a catalyst solution dissolved in a solvent. Examples of the solvent include water, acetone, alcohol, toluene, phenol, a solvent that dissolves the raw material aromatic dihydroxy compound, carbonic acid diester, and the like. Among these solvents, water is preferable, and when an alkali metal compound is used as a catalyst, an aqueous solution is preferable.

  The method for producing the aromatic polycarbonate resin used in the present invention is not particularly limited as long as it is a transesterification method, and various known methods can be adopted. For example, the aromatic polycarbonate resin can be produced by the following method. . That is, usually, both raw materials are uniformly stirred in a raw material mixing tank or the like, and then a catalyst is added to carry out polymerization to produce an aromatic polycarbonate resin. The type of reaction may be any of batch type, continuous type, or a combination of batch type and continuous type.

  The polymerization reaction (transesterification reaction) of the aromatic polycarbonate resin is generally preferably carried out continuously in two or more stages, usually 3 to 7 stages, using two or more polymerization tanks. Specific reaction conditions include a temperature of 150 to 320 ° C., a normal pressure to 2 Pa, and an average residence time of 5 to 150 minutes. In each polymerization tank, the discharge of by-produced phenol is more effective as the reaction proceeds. In order to achieve this, within the above reaction conditions, the temperature is set stepwise to higher temperature and higher vacuum. In order to prevent quality deterioration such as hue of the aromatic polycarbonate resin to be obtained, it is preferable to set the temperature as low as possible and the residence time as short as possible.

  The apparatus used in the transesterification reaction may be any of a vertical type, a horizontal type, a tube type, or a column type. Turbine blades, paddle blades, anchor blades, full zone blades (manufactured by Shinko Pantech Co., Ltd.), Sun Meller blades (manufactured by Mitsubishi Heavy Industries, Ltd.), Max Blend blades (manufactured by Sumitomo Heavy Industries, Ltd.), helical ribbons Following one or more vertical polymerization tanks equipped with blades, torsion lattice blades (manufactured by Hitachi, Ltd.), etc., horizontal type uniaxial polymerization tanks such as disk type and cage type, HVR, SCR, N-SCR (Mitsubishi) Heavy Industries Co., Ltd.), Vivolak (Sumitomo Heavy Industries, Ltd.), Glasses Wings, Lattice Wings (Hitachi, Ltd.), or Glasses Wings and Polymer Feeding Function, eg Twist and Twist A horizontal biaxial type polymerization tank equipped with a combination of blades containing etc. and / or blades with an inclination, etc. can be used.

  In the aromatic polycarbonate resin produced by the transesterification method, a low molecular weight compound such as an aromatic hydroxy compound by-produced by a raw material monomer, a catalyst and a transesterification reaction usually remains. Among these, the raw material monomer and the aromatic hydroxy compound have a large residual amount and adversely affect physical properties such as heat aging resistance and hydrolysis resistance, and therefore are preferably removed upon commercialization. As the amount of residual monomer in the polycarbonate resin, the aromatic dihydroxy compound is 150 ppm by weight or less, preferably 100 ppm by weight or less, more preferably 50 ppm or less, and the aromatic monohydroxy compound is 100 ppm by weight or less. Further, the residual amount of carbonic acid diester is 300 ppm by weight or less, preferably 200 ppm by weight or less, more preferably 150 ppm by weight or less.

The method for removing them is not particularly limited, and for example, they may be removed by continuous deaeration with a vent type extruder. At that time, the basic transesterification catalyst remaining in the resin is preliminarily added with an acidic compound or a precursor thereof to deactivate, thereby suppressing side reactions during degassing, and efficiently starting monomer and Aromatic hydroxy compounds can be removed.
There is no restriction | limiting in particular in the acidic compound to add, or its precursor, As long as it has an effect which neutralizes the basic transesterification catalyst used for a polycondensation reaction, all can be used. Specifically, hydrochloric acid, nitric acid, boric acid, sulfuric acid, sulfurous acid, phosphoric acid, phosphorous acid, hypophosphorous acid, polyphosphoric acid, adipic acid, ascorbic acid, aspartic acid, azelaic acid, adenosine phosphoric acid, benzoic acid, Formic acid, valeric acid, citric acid, glycolic acid, glutamic acid, glutaric acid, cinnamic acid, succinic acid, acetic acid, tartaric acid, oxalic acid, p-toluenesulfinic acid, p-toluenesulfonic acid, naphthalenesulfonic acid, nicotinic acid, picrine Examples thereof include Bronsted acids such as acid, picolinic acid, phthalic acid, terephthalic acid, propionic acid, benzenesulfinic acid, benzenesulfonic acid, malonic acid, maleic acid, and esters thereof. These may be used alone or in combination of two or more. Of these acidic compounds or precursors thereof, sulfonic acid compounds or ester compounds thereof, such as p-toluenesulfonic acid, methyl p-toluenesulfonate, butyl p-toluenesulfonate, and the like are particularly preferable.

  The addition amount of these acidic compounds or precursors thereof is 0.1 to 50 times mol, preferably 0.5 to 30 times mol, of the neutralization amount of the basic transesterification catalyst used in the polycondensation reaction. Add in range. The timing of adding the acidic compound or its precursor may be any time after the polycondensation reaction, and there is no particular limitation on the addition method, depending on the properties of the acidic compound or its precursor and the desired conditions, Any method such as a method of adding directly, a method of adding by dissolving in an appropriate solvent, a method of using a pellet or a flaky master batch may be used.

  The extruder used for deaeration may be uniaxial or biaxial. The twin screw extruder is a meshing type twin screw extruder, and the rotation direction may be the same direction or different direction. For the purpose of deaeration, those having a vent part after the acidic compound addition part are preferred. The number of vents is not limited, but usually a multistage vent of 2 to 10 stages is used. Moreover, in this extruder, additives, such as a stabilizer, a ultraviolet absorber, a mold release agent, and a coloring agent, can be added and knead | mixed with resin as needed.

  The molecular weight of the aromatic polycarbonate resin used in the present invention is preferably 12,000 to 50,000 in terms of viscosity average molecular weight converted from the solution viscosity measured at 25 ° C. using methylene chloride as a solvent, More preferably, it is 15,000-40,000, Most preferably, it is 17,000-32,000. If the viscosity average molecular weight is less than 12,000, the mechanical strength is low, and if it exceeds 50,000, the moldability tends to decrease.

Boride fine particles The boride used in the present invention was selected from the group consisting of La, Ce, Pr, Nd, Tb, Dy, Ho, Y, Sm, Eu, Er, Tm, Yb, Lu, Sr and Ca. At least one metal boride must be in the form of fine particles. The boride fine particles are preferably those whose surfaces are not oxidized, but even if they are somewhat oxidized, the effectiveness of the heat ray shielding effect can be used without change. These boride fine particles are colored powders such as gray black, brown black, green black, etc., but are dispersed in a molded body having a heat ray shielding ability by making the particle size sufficiently smaller than the visible light wavelength. If so, visible light permeability is generated in the molded body having the heat ray shielding ability, and the infrared light shielding ability can be maintained sufficiently strong. The boride fine particles have a particle size of 1000 nm or less, preferably 200 nm or less. A resin molded body having a particle diameter larger than 1000 nm and containing fine particles or coarse particles in which fine particles are aggregated is not preferable because haze increases and transparency decreases. The boride fine particles are preferably hexaboride fine particles.

  In the present invention, boride fine particles whose surface is coated with a silane compound, a titanium compound, a zirconia compound, or the like can be used, and boride can be obtained by coating the surface of the fine particles with these compounds. It becomes possible to improve the water resistance of the fine particles.

In the present invention, the boride fine particles are preferably dispersed in a polymeric dispersant in order to improve uniform dispersibility and workability. As such a polymeric dispersant, one having high transparency and high light transmittance in the visible light region can be used. Specific polymer dispersants include polyacrylate dispersants, polyurethane dispersants, polyether dispersants, polyester dispersants, polyester urethane dispersants, preferably polyacrylate dispersants, A polyether dispersant and a polyester dispersant. The blending ratio of the polymeric dispersant to the boride fine particles is 0.3 parts by weight or more and less than 50 parts by weight, preferably 1 part by weight or more and less than 15 parts by weight with respect to 1 part by weight of the boride fine particles.
A method for dispersing boride fine particles in a polymer-based dispersant is, for example, mixing an appropriate amount of boride fine particles, an organic solvent, and a polymer-based dispersant, and using a zirconia bead having a diameter of 0.3 mm for 5 hours. A boride fine particle dispersion (boride fine particle concentration: 6.5% by weight) is prepared. Furthermore, a boric fine particle dispersion can be obtained by adding an appropriate amount of a polymeric dispersant to the dispersion and removing the organic solvent under reduced pressure at 60 ° C. while stirring.

  The blending ratio of the aromatic polycarbonate resin and boride is 0.0001 to 5 parts by weight, more preferably 0.0005 to 1 part by weight, and more preferably 0 to 100 parts by weight of the aromatic polycarbonate resin. 0.001 to 0.1 parts by weight. If the blending ratio of boride is less than 0.0001 parts by weight, the heat ray shielding effect is small, and if it exceeds 5 parts by weight, haze is increased, transparency is lowered, and this is disadvantageous in terms of cost.

Further, the polycarbonate resin composition of the present invention may be blended with a weather resistance improver, a heat stabilizer, an antioxidant, a mold release agent, and a dye / pigment when used as a window or window part. , Because hue stability is improved.
Weather resistance improvers Examples of weather resistance improvers include inorganic ultraviolet absorbers such as titanium oxide, cerium oxide, and zinc oxide, and organic ultraviolet absorbers such as benzotriazole compounds, benzophenone compounds, and triazine compounds. In the present invention, among these, organic ultraviolet absorbers are preferred, and in particular, benzotriazole compounds, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl) oxy]- Phenol, 2- [4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol, 2,2 ′-(1,4-phenylene) ) Bis [4H-3,1-benzoxazin-4-one], [(4-methoxyphenyl) -methylene] -propanedioic acid-dimethyl ester.

  Examples of the benzotriazole compound include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) benzotriazole, 2- ( 2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-t-butyl-5'-methylphenyl) -5-chloro Benzotriazole, 2- (2′-hydroxy-5′-t-octylphenyl) -2H-benzotriazole, 2- (2′-hydroxy-5′-t-butylphenyl) benzotriazole, 2- (2′- Hydroxy-5'-methacryloxyphenyl) -2H-benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t-amylphenyl) ben Triazole, 2- [2′-hydroxy-3 ′, 5′-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2- [2′-hydroxy-3 ′-(3 ″, 4 '', 5 '', 6 ''-tetrahydrophthalimidomethyl) -5'-methylphenyl] benzotriazole, 2,2'-methylene bis [4- (1,1,3,3-tetramethylbutyl) -6 -(2H-benzotriazol-2-yl) phenol], methyl-3- [3-t-butyl-5- (2H-benzotriazol-2-yl) -4-hydroxyphenyl] propionate and polyethylene glycol And the like.

  Particularly preferred as weathering improvers are 2- (2′-hydroxy-5′-t-octylphenyl) -2H-benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl) oxy] -phenol, 2- [4 , 6-Bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol, 2,2′-methylene bis [4- (1,1,3, 3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol].

  The compounding ratio of the weather resistance improving agent is 0.01 to 5 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. When the amount exceeds 5 parts by weight, there is a problem such as mold deposit, and when the amount is less than 0.01 parts by weight, the effect of improving the weather resistance is insufficient. Although one type of weather resistance improver can be used, a plurality of types can also be used in combination.

Thermal stabilizer The thermal stabilizer preferably used in the present invention is phosphorous acid in which at least one ester in the molecule is esterified with phenol and / or phenol having at least one alkyl group having 1 to 25 carbon atoms. It is at least one selected from an ester compound, phosphorous acid and tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenylene-di-phosphonite. Specific examples of the phosphite compound include trioctyl phosphite, tridecyl phosphite, trilauryl phosphite, tristearyl phosphite, triisooctyl phosphite, tris (nonylphenyl) phosphite, tris (2,4 -Dinolylphenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, triphenylphosphite, tris (octylphenyl) phosphite, diphenylisooctylphosphite, diphenylisodecylphosphite, octyl Diphenyl phosphite, dilauryl phenyl phosphite, diisodecyl phenyl phosphite, bis (nonylphenyl) phenyl phosphite, diisooctylphenyl phosphite, diisodecyl pentaerythritol Diphosphite, dilauryl pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, (phenyl) (1,3-propanediol) phosphite, (4-methylphenyl) (1,3-propanediol) phosphite, ( 2,6-dimethylphenyl) (1,3-propanediol) phosphite, (4-tert-butylphenyl) (1,3-propanediol) phosphite, (2,4-di-tert-butylphenyl) ( 1,3-propanediol) phosphite, (2,6-di-tert-butylphenyl) (1,3-propanediol) phosphite, (2,6-di-tert-butyl-4-methylphenyl) ( 1,3-propanediol) phosphite, (phenyl) (1,2-ethanedioe ) Phosphite, (4-methylphenyl) (1,2-ethanediol) phosphite, (2,6-dimethylphenyl) (1,2-ethanediol) phosphite, (4-tert-butylphenyl) (1 , 2-ethanediol) phosphite, (2,4-di-tert-butylphenyl) (1,2-ethanediol) phosphite, (2,6-di-tert-butylphenyl) (1,2-ethane Diol) phosphite, (2,6-di-tert-butyl-4-methylphenyl) (1,2-ethanediol) phosphite, (2,6-di-tert-butyl-4-methylphenyl) (1 , 4-butanediol) phosphite, diphenylpentaerythritol diphosphite, bis (2-methylphenyl) pentaerythritol diphosphat Bis (3-methylphenyl) pentaerythritol diphosphite, bis (4-methylphenyl) pentaerythritol diphosphite, bis (2,4-dimethylphenyl) pentaerythritol diphosphite, bis (2,6-dimethyl) Phenyl) pentaerythritol diphosphite, bis (2,3,6-trimethylphenyl) pentaerythritol diphosphite, bis (2-tert-butylphenyl) pentaerythritol diphosphite, bis (3-tert-butylphenyl) penta Erythritol diphosphite, bis (4-tert-butylphenyl) pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl) Ruphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-ethylphenyl) pentaerythritol Examples thereof include diphosphite, bis (nonylphenyl) pentaerythritol diphosphite, bis (biphenyl) pentaerythritol diphosphite, and dinaphthyl pentaerythritol diphosphite.

  The blending ratio of the heat stabilizer is 0.001 to 1 part by weight, preferably 0.001 to 0.4 part by weight, based on 100 parts by weight of the aromatic polycarbonate resin. When it exceeds 1 part by weight, there are problems such as deterioration of hydrolysis resistance.

Antioxidant Antioxidants that are preferably used in the present invention include hindered phenol antioxidants. Specific examples include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxy Phenyl) propionate, thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di -Tert-butyl-4-hydroxyphenylpropionamide), 2,4-dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxy Phenyl] methyl] phosphoate, 3,3 ′, 3 ″, 5,5 ′, 5 ″ -hexa-tert-butyl-a, a ′, a ″-(mesitylene -2,4,6-triyl) tri-p-cresol, 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) bis [3- (5-tert-butyl-4-hydroxy -M-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3,5-tris (3,5-di-tert-butyl) -4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, 2,6-di-tert-butyl-4- (4,6-bis (octylthio) ) -1,3,5-triazin-2-ylamino) phenol, etc. Among them, in particular, pentaerythritol tetrakis [3- (3,5-di-tert-butyl- -Hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, these two phenolic antioxidants are available from Ciba Specialty Chemicals. Commercially available under the names Knox 1010 and Irganox 1076.

  The blending ratio of the phenolic antioxidant is preferably 0.01 to 1 part by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. If the blending amount of the phenolic antioxidant is less than 0.01 parts by weight, the effect as an antioxidant is insufficient, and even if it exceeds 1 part by weight, no further effect as an antioxidant can be obtained.

Release Agents As release agents preferably used in the present invention, aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15000, and polysiloxane silicone oils are used. It is at least one compound selected.

Examples of the aliphatic carboxylic acid include saturated or unsaturated aliphatic monovalent, divalent or trivalent carboxylic acid. Here, the aliphatic carboxylic acid includes alicyclic carboxylic acid. Among these, preferable aliphatic carboxylic acids are monovalent or divalent carboxylic acids having 6 to 36 carbon atoms, and aliphatic saturated monovalent carboxylic acids having 6 to 36 carbon atoms are more preferable. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, melissic acid, tetrariacontanoic acid, montanic acid , Adipic acid, azelaic acid and the like.

As the aliphatic carboxylic acid in the ester of an aliphatic carboxylic acid and an alcohol, the same one as the aliphatic carboxylic acid can be used. Examples of the alcohol that reacts with the aliphatic carboxylic acid to form an ester include saturated or unsaturated monohydric alcohols and saturated or unsaturated polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these alcohols, monovalent or polyvalent saturated alcohols having 30 or less carbon atoms are preferable, and aliphatic saturated monohydric alcohols or polyhydric alcohols having 30 or less carbon atoms are more preferable. Here, aliphatic includes alicyclic compounds. Specific examples of these alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaerythritol. Etc. These ester compounds of aliphatic carboxylic acids and alcohols may contain aliphatic carboxylic acids and / or alcohols as impurities, or may be a mixture of a plurality of compounds.

  Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture based on myricyl palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate Mention may be made of rate, glycerol distearate, glycerol tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate.

  Examples of the aliphatic hydrocarbon having a number average molecular weight of 200 to 15000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, Fischer-Tropsch wax, and α-olefin oligomer having 3 to 12 carbon atoms. Here, as the aliphatic hydrocarbon, an alicyclic hydrocarbon is also included. Moreover, these hydrocarbon compounds may be partially oxidized. Among these, paraffin wax, polyethylene wax, and partial oxides of polyethylene wax are preferable, and paraffin wax and polyethylene wax are more preferable. The number average molecular weight is 200 to 15,000, preferably 200 to 5,000. These aliphatic hydrocarbons may be a single substance, or a mixture of various constituent components and molecular weights, as long as the main component is within the above range.

  Examples of the polysiloxane silicone oil include dimethyl silicone oil, phenylmethyl silicone oil, diphenyl silicone oil, and fluorinated alkyl silicone. These may be used alone or in combination of two or more.

  The compounding ratio of the release agent is 0.01 to 1 part by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. When the compounding ratio of the release agent exceeds 1 part by weight, there are problems such as degradation of hydrolysis resistance and mold contamination during injection molding. One type of release agent can be used, but a plurality of release agents can be used in combination.

Dye / Pigment Examples of the dye / pigment used in the present invention include inorganic pigments, organic pigments, and organic dyes. Examples of inorganic pigments include sulfide pigments such as carbon black, cadmium red, and cadmium yellow, silicate pigments such as ultramarine blue, titanium oxide, zinc white, petal, chromium oxide, iron black, titanium yellow, and zinc-iron. -Based brown, titanium-cobalt green, cobalt-green, cobalt-blue, oxide-based pigments such as copper-chromium black, copper-iron-based black, chromic pigments such as yellow lead, molybdate orange, ferrocyans such as bitumen And the like. As organic pigments and organic dyes, phthalocyanine dyes such as copper phthalocyanine blue and copper phthalocyanine green, azo series such as nickel azo yellow, thioindigo series, perinone series, perylene series, quinacridone series, dioxazine series, isoindolinone series, Examples thereof include condensed polycyclic dyes such as quinophthalone, anthraquinone, heterocyclic, and methyl dyes. Of these, titanium oxide, carbon black, cyanine-based, quinoline-based, anthraquinone-based, and phthalocyanine-based compounds are preferable from the viewpoint of thermal stability, and carbon black, anthraquinone-based compounds, and phthalocyanine-based compounds are more preferable. Specific examples thereof include: MACROLEX Blue RR, MACROLEX Violet 3R, MACROLEX Violet B (manufactured by Bayer), Sumiplast Violet RR, Sumiplast Violet B, Sumiplast Blue OR, Sumitomo Chemical D, Sumitomo Chemical D Blue G, Diaresin Blue N (manufactured by Mitsubishi Chemical Corporation), and the like.

The blending ratio of the dye / pigment is 1 part by weight or less, preferably 0.3 part by weight or less, and more preferably 0.1 part by weight or less with respect to 100 parts by weight of the aromatic polycarbonate resin. The colorant can be used alone or in combination of two or more.
In the present invention, the dye / pigment is originally blended for the purpose of adjusting the visibility by transmitted light. That is, when the compounding amount of the metal boride fine particles is increased, the hue of the molded body is changed and the visibility is lowered (specifically, the L value is lowered and the absolute values of the a value and the b value are increased). Therefore, the visibility by the transmitted light is improved by selecting the type and / or blending ratio of the dye / pigment to be blended to obtain an appropriate hue. Of course, depending on the use of the molded product, for example, in a sunroof or the like, a black pigment such as carbon black can be blended and the L value can be intentionally lowered within a range that does not impair the heat ray shielding property.

At least in the polycarbonate resin composition of the infrared absorbing agent present invention, in order to further improve the heat ray-shielding performance, if necessary, chosen more of antimony-doped tin oxide fine particles, an In, Ga, from the group consisting of Al and Sb Other organic and inorganic infrared absorbers such as zinc oxide fine particles containing one kind of element, tin-doped indium oxide fine particles, phthalocyanine-based, naphthalocyanine-based, copper sulfide, and copper ions can also be blended.

Other Additives The polycarbonate resin composition of the present invention further includes other thermoplastic resins such as ABS, polystyrene, polyethylene, polypropylene, and polyester, phosphorus-based, metal salt-based, silicon, and the like within the range not impairing the object of the present invention. -Based flame retardants, impact resistance improvers, antistatic agents, slip agents, anti-blocking agents, lubricants, antifogging agents, natural oils, synthetic oils, waxes, organic fillers, glass fibers, carbon fibers, etc. Additives such as sheet reinforcing materials such as glass reinforcing materials, mica, talc and glass flakes, or inorganic fillers such as whiskers such as potassium titanate, aluminum borate and wollastonite can be blended.

Method for producing a polycarbonate resin composition of the production method the present invention the polycarbonate resin composition is not particularly limited, for example, (1) a fang aromatic time during or completion of the polymerization reaction of the polymerization reaction of a polycarbonate resin, borides and other (2) A method of mixing borides and other additives while the aromatic polycarbonate resin is melted, such as during kneading, (3) Aromatic polycarbonate resin in a solid state, such as pellets There is a method of mixing borides and other additives and then melting and kneading them with an extruder or the like.

Molded body having heat ray shielding ability The method for molding a shaped body having heat ray shielding ability from the polycarbonate resin composition of the present invention is not particularly limited, and is a molding generally used for thermoplastic resins. Any of the methods such as injection molding, injection blow molding, injection compression molding, blow molding, extrusion molding of films and sheets, profile extrusion molding, thermoforming, rotational molding, and the like can be applied. Furthermore, fluid-assisted molding such as gas or water, molding using supercritical or subcritical gas, insert molding of functionalized film or sheet such as various printing, two-color molding, in-mold molding, other resin or ultraviolet rays Coextrusion of the absorbent layer, lamination, etc. are also possible. From the degree of freedom of the shape that can be molded, injection molding or injection compression molding is preferable. Furthermore, a hot runner can be used in injection molding or injection compression molding. The shape of the molded body can be formed into an arbitrary shape as necessary, but preferably has a planar or curved plate-like portion. Although there is no restriction | limiting in particular in the thickness of a plate-shaped part, The molded object provided with the heat ray shielding ability of this invention has a plate-shaped part of 0.2 mm or more and 10 mm or less. The thickness of the plate-like portion is preferably 1 mm or more and 10 mm or less, and most preferably 3 mm or more and 8 mm or less. When the thickness of the plate-like portion is 0.2 mm or less, it is necessary to blend boride at a high concentration in order to obtain sufficient heat ray shielding performance, and it is difficult to obtain transparency. The molded body having such a heat ray shielding ability can be further subjected to an annealing treatment, if necessary, and bonded to other parts. The bonding method is not particularly limited, but known methods such as vibration welding and laser welding can be used in addition to bonding with a solvent.

  Moreover, the molded object provided with the heat ray shielding ability of the present invention is an aromatic polycarbonate resin molded article having a plate-like portion having a thickness of 0.2 to 10 mm, and the plate shape in the molded article provided with the heat ray shielding ability. The haze in the part is less than 5%, preferably less than 3%, more preferably 2.5% or less, and the solar transmittance is preferably 70% or less, preferably 60% or less. The ratio of the light transmittance to the solar transmittance (total light transmittance / sunlight transmittance) is preferably 1.1 or more, more preferably 1.2 or more, and particularly preferably 1.3 or more. A large ratio between the total light transmittance and the solar radiation transmittance indicates that the heat rays are selectively absorbed as compared with visible light, and this value is preferably large. In addition, in order to provide performance required as a window or window part, heat ray shielding having at least one functionalized layer selected from a hard coat layer and an antireflection layer on one side or both sides of the plate-like portion. A molded body having a function is preferable. More preferably, the hue of the plate-like portion is within the range of L value of 92 to 35, a value of 5 to -15, and b value of 15 to -5. In general, the greater the L value, the better the visible light transmission, and the closer the a and b values are to zero, the less the coloring.

  The method of laminating at least one functional layer selected from a hard coat layer and an antireflection layer on one or both sides of a molded body having a plate-like portion having a thickness of 0.2 to 10 mm is particularly limited. Instead, various conventionally known methods are used.

The antireflection layer may be, for example, (A) various vacuum deposition methods such as electron beam heating method, resistance heating method, flash deposition method, etc .; (B) plasma deposition method; (C) bipolar sputtering method, direct current sputtering method, high frequency sputtering. Various sputtering methods such as sputtering, magnetron sputtering, ion beam sputtering, and bias sputtering; (D) DC method, RF method, multi-cathode method, activation reaction method, HCD method, field evaporation method, high-frequency ion plating method Various ion plating methods such as reactive ion plating method; (E) CVD method and the like. Furthermore, the antireflection layer is coated by dispersing a metal oxide sol having a high refractive index such as ZrO 2 sol, TiO 2 sol, Sb 2 O 5 sol, and WO 3 sol in a silicon hard coat agent or primer. -It can also be formed by thermosetting.

For the formation of the hard coat layer, an undercoat layer is provided as desired, and a hard coat agent such as epoxy, acrylic, amino resin, polysiloxane, colloidal silica, organic / inorganic hybrid, etc., A method of applying by various coating methods such as a dip coating method, a spin coating method, a spray coating method, a flow coating method and the like and curing by means of heat or ultraviolet rays can be used. One or more hard coat layers can be provided on the polycarbonate substrate. For example, it is possible to apply a hard coating agent directly onto a polycarbonate substrate, but it may be applied onto an undercoat layer previously formed on the substrate. Further, the surface of the hard coat layer can be subjected to an antifogging treatment, an antireflection film coating or the like in addition to an inorganic compound treatment such as SiO 2 by plasma polymerization or the like. The hard coat layer is not only formed by applying a hard coat agent to the surface of the molded product, but a sheet or film having the hard coat layer is set in a mold and a polycarbonate composition is injection-molded there. Thus, it is also possible to create an integrally molded body having a hard coat layer. In these hard coat layers, various kinds of treatment agents, for example, UV absorbers such as triazole and triazine compounds, and metal / metal oxide fine particle heat ray shielding such as boride, ITO, ATO, ZnO, zinc antimonate, etc. Agent, copper compound, organic complex, phthalocyanine, naphthalocyanine, diimonium, anthraquinone, aminium, cyanine, azo compound, quinone, polymethine, diphenylmethane, etc. These various heat ray shielding agents can also be contained. These additives may be added to either the hard coat layer and / or the undercoat layer. The thickness of the antireflection layer or hard coat layer is 1 μm to 20 μm, preferably 2 μm to 10 μm. If the thickness is less than 1 μm, the durability of the antireflection layer or the hard coat layer is insufficient, and if it exceeds 20 μm, cracks are likely to occur in the antireflection layer or the hard coat layer. The surface functionalized layer of the molded article having the heat ray shielding ability of the present invention is preferably a hard coat layer from the viewpoint of a window or window part.

  The plate-like portion having a thickness of 0.2 to 10 mm which the molded body having the heat ray shielding ability according to the present invention has a haze of less than 5%, preferably less than 3%, more preferably 2.5% or less. In addition, the solar radiation transmittance is preferably 70% or less, and particularly preferably 60% or less. If the haze is 5% or more, the transparency is lowered and it is not suitable as a window glass for general buildings or vehicles. Further, if the solar radiation transmittance exceeds 70%, the indoor temperature of a general building or vehicle may be excessively increased, and therefore excluded from the present invention.

  The molded body having the heat ray shielding ability according to the present invention can be subjected to arbitrary partial decoration on the functionalized layer or the polycarbonate resin, and imparts design properties by blackout, various marks, characters, etc. Although the hue of the plate-like portion in the molded body having a heat ray shielding ability and not decorated, the L value is 92 to 35, the a value is 5 to -15, b The value is preferably 15 to -5. When the L value is less than 35, even if the a value and the b value are within the predetermined ranges of 5 to -15 and 15 to -5, respectively, blackening and transparency are lowered. In addition, even if the L value is 80 or more, if the a value and the b value are less than −15 and −5, respectively, a strong green to bluish color is obtained. Strong color is not preferable. Furthermore, when the L value, the a value, and the b value are out of the above ranges, the hue heat stability of the polycarbonate resin composition tends to be low.

EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples. In the following examples, details of the raw materials used are as follows. 〔raw materials〕
(1) Aromatic polycarbonate * PC-1: Polycarbonate resin produced by a transesterification method (viscosity average molecular weight = 21,000, terminal hydroxyl group concentration = 1000 ppm, heterogeneous structure amount = 0.30 mol%)
* PC-2: polycarbonate resin produced by transesterification (viscosity average molecular weight = 21,000, terminal hydroxyl group concentration = 150 ppm, heterogeneous structure = 0.35 mol%)
* PC-3: Polycarbonate resin manufactured by the interfacial method (Mitsubishi Engineering Plastics Co., Ltd., trade name Iupilon S-3000, viscosity average molecular weight = 21,000, terminal hydroxyl group concentration = 150 ppm, heterogeneous structure amount = 0 mol) %)
* PC-4: Polycarbonate resin produced by the interfacial method (Mitsubishi Engineering Plastics Co., Ltd., trade name: NOVAREX 7022pj, viscosity average molecular weight = 21,000, terminal hydroxyl group concentration = 50 ppm, heterogeneous structure content = 0 mol% )
(2) Boride 1: Lanthanum hexaboride fine particle dispersion (manufactured by Sumitomo Metal Mining Co., Ltd., trade name KHDS-02), lanthanum hexaboride fine particle content 10.5% by weight
(3) Weather resistance improver: 2- (2′-hydroxy-5′-tert-octylphenyl) -2H-benzotriazole, manufactured by Cypro Kasei Co., Ltd., trade name Seasorb 709 (hereinafter “UV absorber 1”) Abbreviated)
(4) Thermal stabilizer: Tris (2,4-di-tert-butylphenyl) phosphite, manufactured by Asahi Denka Kogyo Co., Ltd., trade name ADK STAB AS2112 (hereinafter abbreviated as “phosphorous stabilizer 1”)
(5) Antioxidant: Pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], manufactured by Ciba Specialty Chemicals, trade name Irganox 1010 (hereinafter, “ Abbreviated as "phenolic stabilizer 1")
(6) Mold release agent 1: Pentaerythritol tetrastearate (Nippon Yushi Co., Ltd., trade name Unistar H476)
(7) Dye 1: Macrolex Blue RR (manufactured by Bayer)
(8) Dye 2: Dialresin Red HS (Mitsubishi Chemical Corporation)
(9) Carbon Black: Product name Carbon Black # 1000 (hereinafter abbreviated as “CB1”) manufactured by Mitsubishi Chemical Corporation.

Moreover, in the following Examples, the details of the evaluation method of a molded article having a heat ray shielding ability, which is obtained by molding the obtained aromatic polycarbonate resin composition, are as follows.
[Evaluation method]
(1) Haze / total light transmittance: According to JIS K-7105, a 3 mm-thick flat plate was used as a test piece, and measured with a NDH-2000 type haze meter manufactured by Nippon Denshoku Industries Co., Ltd.
(2) Solar transmittance: From a value of transmittance of light in a wavelength range of 300 to 2500 nm measured using a U-3100PC spectrophotometer manufactured by Shimadzu Corporation with a 3 mm-thick flat plate as a test piece, The solar transmittance was calculated according to JIS R-3106.
(3) L value, a value, b value: A 3 mm-thick flat plate was used as a test piece, and measured by a transmission method using a SE2000 type spectrocolorimeter manufactured by Nippon Denshoku Industries Co., Ltd.

[Examples 1-3 , 5-6 , Reference Example 4, Comparative Examples 1-2]
After mixing the raw materials and additives described in Table 1, the mixture was supplied to a 40 mm single screw extruder and kneaded and pelletized at 280 ° C.
The obtained pellets were dried at 120 ° C. for 5 hours, and then 3 mm thick under the conditions of a cylinder temperature of 290 ° C., a mold temperature of 80 ° C., and a molding cycle of 40 seconds using an M150AII-SJ type injection molding machine manufactured by Meiki Seisakusho. A flat plate was formed. On this flat plate surface, an acrylic undercoat and a silicon hard coat were respectively applied and UV cured to form a 10 μm thick undercoat layer and a 5 μm thick hard coat layer. It was set as the test piece for 1)-(3). The evaluation results are shown in Table-1.

In the above table, (1) Examples 2-3 and Comparative Example 1; between Example 5 and Comparative Example 2, when the same amount of boride is compared and compared, a polycarbonate resin having a predetermined terminal hydroxyl group concentration It is clear that the haze has lower haze and better transparency.
(2) It is clear that between Examples 2 and 3 , there is a difference in haze reduction effect depending on the terminal hydroxyl group concentration of the polycarbonate resin used.
(3) Between Example 5 and Example 6, when the amount of boride is slightly large (0.08 parts by weight), the solar transmittance can be kept low, but the hue is recognized particularly in the b value. It is clear that the marked coloration which can be improved by the addition of dye 1 and dye 2.

Claims (5)

  1. The percentage (mol%) of the total number of moles of the different structural units represented by the following formulas (2) and (3) with respect to the number of moles of the normal structural unit represented by the following formula (1) is 0.1 to 0.00 . La, Ce, Pr, with respect to 100 parts by weight of an aromatic polycarbonate resin having a terminal hydroxyl group concentration in the range of 100 to 1800 ppm, which is 5 mol% and polymerized by an ester exchange reaction from an aromatic dihydroxy compound and a carbonic acid diester. 0.0001 to 5 parts by weight of boride fine particles of at least one metal selected from the group consisting of Nd, Tb, Dy, Ho, Y, Sm, Eu, Er, Tm, Yb, Lu, Sr, and Ca a molded article having a heat ray shielding ability obtained by molding the port polycarbonate resin composition containing, has a plate-like portion of the thickness of 3 to 10 mm, and, in the plate-like portion, the 3mm thick Contact The molded object provided with the heat ray shielding capability characterized by having a haze of 2.1% or less and a solar transmittance of 70% or less.
    (In the formula, X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, or It is a divalent group selected from the group consisting of —O—, —S—, —CO—, —SO— and —SO 2 —.
  2. 2. The molded article having heat ray shielding ability according to claim 1, wherein the terminal hydroxyl group concentration of the aromatic polycarbonate resin is 300 to 1500 ppm.
  3. The plate-like portion on one or both sides of the heat ray shielding according to claim 1 or 2, characterized in that it has at least one functional layer one or more layers selected from a hard coat layer and an antireflection layer Molded body with performance.
  4. Hue of the plate-like portion, L value = 92 to 35, any of claims 1 to 3, characterized in that in the range expressed by a value = 5-15 and b-value = 15-5 2. A molded article having the heat ray shielding ability according to 1 .
  5. The molded body having a heat ray shielding ability according to any one of claims 1 to 4 , wherein the molded body is a window or a window part for a general building or a vehicle.
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