Laminate

Abstract

To provide a laminate that is excellent in transparency, chemical resistance, heat resistance, adhesion, and excoriation resistance.SOLUTION: A laminate comprises a layer (A layer) formed from a polycarbonate resin composition comprising a polycarbonate resin (A) and a thermoplastic elastomer, and a layer (B layer) formed from a polycarbonate resin (B) comprising a unit (b) represented by the formula (B).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a laminate having excellent transparency, chemical resistance, heat resistance, adhesion, and scratch resistance. [Background technology]

[0002] Conventionally, methacrylic resins and polycarbonate resins made from bisphenol A (hereinafter sometimes referred to as PC-A) have been known as transparent resins, and these resins are used in a wide range of fields, including electrical and electronic components, optical components, automotive components, and mechanical components, in the form of molded products and films.

[0003] In recent years, concerns about the depletion of petroleum resources and the increase in atmospheric carbon dioxide, which contributes to global warming, have led to significant attention being paid to biomass resources, which do not rely on petroleum as a raw material and are carbon-neutral (do not increase carbon dioxide when burned). In the field of polymers, bioplastics produced from biomass resources have been actively developed. In particular, polycarbonates made primarily from isosorbide as a monomer have excellent heat resistance, weather resistance, surface hardness, and chemical resistance, and have attracted attention due to their characteristics different from PC-A, and various investigations have been conducted. While these isosorbide-based polycarbonates have excellent heat resistance, impact resistance, weather resistance, and chemical resistance, they have extremely poor adhesion to other resins, such as PC-A and acrylic resins, making it generally difficult to form laminates with them.

[0004] Additionally, as a measure against VOCs, attention is being paid to decorative methods that replace painting and plating, but there have been issues with moldability due to the glass transition temperature of general polycarbonate, such as low-temperature preforming, vacuum molding, and injection molding.

[0005] Patent Document 1 describes a structure in which processability is improved by laminating a polycarbonate resin containing a thermoplastic elastomer with an acrylic resin, but because the surface layer is made of acrylic resin, it is difficult to achieve chemical resistance.

[0006] Patent Document 2 describes using an acrylic resin to laminate with PC-A, but there was an issue that the original chemical resistance performance could not be fully utilized due to the influence of the acrylic component contained in the composite.

[0007] Patent Documents 3 to 6 describe laminates in which an isosorbide-based polycarbonate resin is used to adhere to a PC-A resin, but no proposal has been made regarding a structure with a polycarbonate containing a thermoplastic elastomer. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5639837 [Patent Document 2] International Publication No. 2018 / 143194 [Patent Document 3] Patent No. 6068538 [Patent Document 4] Patent No. 5718679 [Patent Document 5] Patent No. 6200002 [Patent Document 6] Patent No. 6775610 Summary of the Invention [Problem to be solved by the invention]

[0009] An object of the present invention is to provide a laminate having excellent transparency, chemical resistance, heat resistance, adhesion, and scratch resistance. [Means for solving the problem]

[0010] As a result of extensive research, the present inventors have discovered that by forming a laminate using a polycarbonate resin (A) containing a thermoplastic elastomer and a polycarbonate resin (B) containing carbonate units derived from isosorbide, it is possible to obtain a laminate that is excellent in transparency, chemical resistance, and moldability, that has improved adhesion without the need for an adhesive layer, and that has excellent scratch resistance, and have thereby completed the present invention. That is, according to the present invention, the object of the invention is achieved by the following items 1 to 9.

[0011] 1. A laminate having a layer (layer A) formed from a polycarbonate resin composition containing a polycarbonate resin (A) and a thermoplastic elastomer, and a layer (layer B) formed from a polycarbonate resin (B) containing a unit (b) represented by the following formula (B):

[0012] [ka]

[0013] 2. The laminate according to item 1 above, wherein the polycarbonate resin (A) used in the layer A contains 50 mol % or more of carbonate units derived from aromatic dihydroxy units. 3. A laminate according to item 1 or 2 above, wherein the thermoplastic elastomer used in layer A is a thermoplastic elastomer composed of hard segments consisting of polybutylene terephthalate units and soft segments consisting of polyester units having an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid as the dicarboxylic acid component and a diol having 5 to 15 carbon atoms as the diol component.

[0014] 4. The laminate according to any one of items 1 to 3 above, wherein the content of the thermoplastic elastomer in layer A is 3 to 50 parts by weight per 100 parts by weight of the polycarbonate resin (A). 5. The laminate according to any one of items 1 to 4 above, wherein the polycarbonate resin (B) used in layer B contains 30 to 100 mol % of the unit (b) represented by formula (B). 6. The laminate according to any one of items 1 to 5 above, wherein the polycarbonate resin (B) used in layer B further contains 5 to 70 mol % of units (c) represented by the following formula (C-1):

[0015] [ka]

[0016] (In the formula, W represents an alkylene group having 1 to 20 carbon atoms or a cycloalkylene group having 6 to 20 carbon atoms, R represents a branched or linear alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 6 to 20 carbon atoms which may have a substituent, and m represents an integer of 0 to 10.)

[0017] 7. The laminate according to any one of items 1 to 6 above, wherein the thickness of the laminate is 0.05 to 10.0 mm. 8. The laminate according to any one of items 1 to 7 above, wherein the laminate has a visible light transmittance of 85% or more. 9. The laminate according to any one of the above items 1 to 8, which is produced by melt extrusion. [Effects of the Invention]

[0018] The present invention uses a polycarbonate resin (A) containing a thermoplastic elastomer and a polycarbonate resin (B) containing carbonate units derived from isosorbide, and laminates having a layer formed from the resin (A) and a layer formed from the resin (B) have excellent transparency, chemical resistance, heat resistance, adhesion, and scratch resistance, and are therefore useful as transparent sheets for building materials, interior parts, display covers, etc., sheets for resin-coated metal plates, sheets for molding (vacuum / pressure molding, hot press molding, etc.), colored plates, transparent plates, shrink films, shrink labels, shrink tubes, automotive interior materials, resin glazing, home appliance components, and office equipment components, thereby achieving exceptional industrial effects. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will be described in detail below.

[0020] The present invention is a laminate having a layer (layer A) formed from a polycarbonate resin composition containing a polycarbonate resin (A) and a thermoplastic elastomer, and a layer (layer B) formed from a polycarbonate resin (B) containing a unit (b) represented by the following formula (B):

[0021] [ka]

[0022] (About Layer A) In the present invention, the layer A is a layer formed from a polycarbonate resin composition containing a polycarbonate resin (A) and a thermoplastic elastomer.

[0023] (Polycarbonate resin (A)) The polycarbonate resin (A) used in the present invention is a polymer in which dihydroxy compounds are bonded by carbonate ester bonds, and although there are no particular restrictions on the polymer, it is usually obtained by reacting a dihydroxy component with a carbonate precursor by interfacial polymerization or melt polymerization.

[0024] The polycarbonate resin (A) is preferably an aromatic polycarbonate resin containing bisphenol components in an amount of preferably 50 mol% or more, more preferably 60 mol% or more, even more preferably 70 mol% or more, particularly preferably 80 mol% or more, and most preferably 90 mol% or more of the total dihydroxy components. That is, the polycarbonate resin (A) used in layer A contains carbonate units derived from aromatic dihydroxy units in an amount of preferably 50 mol% or more, more preferably 60 mol% or more, even more preferably 70 mol% or more, particularly preferably 80 mol% or more, and most preferably 90 mol% or more.

[0025] Representative examples of dihydroxy components include 2,2-bis(4-hydroxyphenyl)propane (commonly known as bisphenol A), 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl)cyclohexane ... Examples of suitable bisphenols include 1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 1,1-bis(4-hydroxyphenyl)octane, 1,1-bis(4-hydroxyphenyl)decane, 9,9-bis{(4-hydroxy-3-methyl)phenyl}fluorene, 9,9-bis(4-hydroxyphenyl)fluorene, α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene, isosorbide, 1,3-propanediol, 1,4-butanediol, and 1,6-hexanediol. These may be homopolymers using a single bisphenol or copolymers of two or more bisphenols. Among these, bisphenol A is preferred from the viewpoints of physical properties and cost. It is particularly preferred that bisphenol A account for 50 mol% or more of the bisphenol component, more preferably 60 mol% or more, even more preferably 70 mol% or more, particularly preferably 80 mol% or more, and most preferably 90 mol% or more.

[0026] Specific examples of the polycarbonate resin (A) include a homopolymer of bisphenol A, a binary copolymer of bisphenol A and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, and a binary copolymer of bisphenol A and 9,9-bis{(4-hydroxy-3-methyl)phenyl}fluorene, with a homopolymer of bisphenol A being most preferred.

[0027] The glass transition temperature of the polycarbonate resin (A) is preferably in the range of 100 to 200° C., more preferably in the range of 120 to 180° C. A glass transition temperature of not more than the upper limit is preferred because the resin composition with the thermoplastic elastomer has a good melt viscosity and is easy to form into a melt film, and the heat resistance of the resulting laminate is sufficient.

[0028] Carbonate precursors that can be used include carbonyl halides, carbonate esters, and haloformates, and specific examples include phosgene, diphenyl carbonate, and dihaloformates of dihydric phenols.

[0029] When the dihydroxy compound and carbonate precursor are reacted by interfacial polymerization or melt polymerization to produce a polycarbonate resin, a catalyst, a terminal terminator, an antioxidant, etc. may be used as necessary. The polycarbonate resin (A) may be a branched polycarbonate resin copolymerized with a trifunctional or higher polyfunctional aromatic compound, or a polyester carbonate resin copolymerized with an aromatic or aliphatic bifunctional carboxylic acid, or may be a mixture of two or more of the obtained polycarbonate resins.

[0030] The molecular weight of the polycarbonate resin (A) in the present invention is preferably in the range of 13,000 to 40,000, expressed as viscosity average molecular weight. A viscosity average molecular weight within this range is preferred because it makes the laminate less brittle and less likely to crack or burr during hot bending. It is also preferred because the resin composition with a thermoplastic elastomer has a good melt viscosity, facilitating melt film formation. The viscosity average molecular weight is more preferably in the range of 15,000 to 35,000, even more preferably in the range of 20,000 to 32,000, and particularly preferably in the range of 22,000 to 28,000. When the polycarbonate resin (A) is a mixture of two or more types, the molecular weight refers to the molecular weight of the entire mixture. Here, the viscosity average molecular weight is the specific viscosity (η) at 20°C of a solution in which 0.7 g of polycarbonate is dissolved in 100 mL of methylene chloride. sp ) was measured, and the viscosity average molecular weight M was calculated using the following formula: η sp / c=[η]+0.45×[η] 2 c [η]=1.23×10 -4 M 0.83 (where c=0.7g / dL, [η] is the intrinsic viscosity)

[0031] The polycarbonate resin (A) may contain various additives commonly used in polycarbonate resins, such as heat stabilizers, antioxidants, mold release agents, UV absorbers, antistatic agents, light stabilizers, flame retardants, impact modifiers, colorants, and dyes, as described below. Furthermore, the polycarbonate resin (A) may contain reinforcing fillers such as glass fibers, provided that the effects of the present invention are not impaired.

[0032] <Thermoplastic elastomer> The thermoplastic elastomer used in the present invention is preferably a polyester-based thermoplastic elastomer, which is preferably composed of a hard segment made of a polybutylene terephthalate unit and a soft segment made of a polyester unit having an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid as the dicarboxylic acid component and a diol having 5 to 15 carbon atoms as the diol component.

[0033] (Hardware segment) The hard segment is preferably a polyester segment, the melting point of the polymer comprising the segment being preferably 150° C. or higher.

[0034] The hard segment is composed of polybutylene terephthalate units. Polybutylene terephthalate has excellent compatibility with polycarbonate resins, is preferred in terms of transparency and thermoformability, and also has good properties in terms of strength, etc. Polybutylene terephthalate may contain other components as copolymerization components within a range that does not impair the effects of the present invention. The proportion of such copolymerization components is preferably 30 mol % or less, more preferably 20 mol % or less, and even more preferably 10 mol % or less, of the total components (100 mol %) of both the dicarboxylic acid component and the diol component.

[0035] (Software segment) The soft segment refers to a segment in which the melting point of the polymer formed from the segment is preferably 100°C or lower, or which is liquid and amorphous at 100°C.

[0036] The soft segment is preferably a polyester composed of an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, and a diol having 5 to 15 carbon atoms (hereinafter, sometimes referred to as "SS-1"). SS-1 is suitable because it provides extremely good transparency.

[0037] In order to obtain better transparency, the soft segment SS-1 preferably contains 60 to 99 mol% of aromatic dicarboxylic acid and 1 to 40 mol% of aliphatic dicarboxylic acid out of a total of 100 mol% of dicarboxylic acid components. It is more preferable that the aromatic dicarboxylic acid content is 70 to 95 mol% and the aliphatic dicarboxylic acid content is 5 to 30 mol%. It is even more preferable that the aromatic dicarboxylic acid content is 85 to 93 mol% and the aliphatic dicarboxylic acid content is 7 to 15 mol%. It is particularly preferable that the aromatic dicarboxylic acid content is 89 to 92 mol% and the aliphatic dicarboxylic acid content is 8 to 11 mol%.

[0038] As the aromatic dicarboxylic acid of SS-1, terephthalic acid and isophthalic acid are preferred, with isophthalic acid being particularly preferred from the viewpoint of reducing crystallinity.As the aliphatic dicarboxylic acid of SS-1, linear aliphatic dicarboxylic acids having 6 to 12 carbon atoms such as succinic acid, adipic acid, and sebacic acid are preferred, with sebacic acid being particularly preferred.

[0039] As the diol component having 5 to 15 carbon atoms in SS-1, a linear aliphatic diol having 6 to 12 carbon atoms such as hexamethylene glycol, decamethylene glycol, 3-methylpentanediol, and 2-methyloctamethylenediol is preferred, with hexamethylene glycol being particularly preferred.

[0040] SS-1 is particularly preferred because it has high compatibility with polycarbonate resins, can produce highly transparent laminates, and has good surface properties and transparency after thermoforming. More specifically, SS-1 is preferably a polyester composed of isophthalic acid, sebacic acid, and hexamethylene glycol.

[0041] In addition, the ratio of hard segments to soft segments in the polyester-based thermoplastic elastomer is preferably 20 to 70% by weight of hard segments and 80 to 30% by weight of soft segments, and more preferably 20 to 40% by weight of hard segments and 80 to 60% by weight of soft segments, based on 100% by weight of the elastomer. The intrinsic viscosity of the polyester-based thermoplastic elastomer (measured in o-chlorophenol at 35°C) is preferably 0.6 or higher, more preferably 0.8 to 1.5, and even more preferably 0.8 to 1.2. An intrinsic viscosity within the above range is preferable because it provides sufficient strength for the laminate.

[0042] The polyester-based thermoplastic elastomer can be obtained by melt-kneading the above-mentioned hard segment and soft segment to cause a reaction and form a multi-block copolymer.

[0043] The intrinsic viscosity of the polymer that becomes the hard segment is preferably in the range of 0.2 to 2.0, more preferably 0.5 to 1.5. The intrinsic viscosity of the polymer that becomes the soft segment is preferably in the range of 0.2 to 2.0, more preferably 0.5 to 1.5. The reaction is preferably carried out at a temperature in the range of 200 to 300°C, more preferably 220 to 260°C.

[0044] The number average molecular weight of each of the hard and soft segments thus multiblocked is preferably in the range of 500 to 7,000, more preferably in the range of 800 to 5,000.

[0045] In the present invention, the content of the thermoplastic elastomer in Layer A is preferably 3 to 50 parts by weight, more preferably 4 to 30 parts by weight, and even more preferably 5 to 25 parts by weight, relative to 100 parts by weight of the polycarbonate resin (A). A content in the range equal to or greater than the lower limit is preferred because the effect of improving thermoformability by adding the thermoplastic elastomer is excellent, while a content in the range equal to or less than the upper limit is preferred because the heat distortion temperature of the resin composition is good and the heat resistance of the laminate is excellent.

[0046] (About B layer) In the present invention, the layer B is a layer formed from a polycarbonate resin (B) containing a unit (b) represented by the following formula (B).

[0047] [ka]

[0048] (Polycarbonate resin (B)) The polycarbonate resin (B) is a polycarbonate containing a plant-derived ether diol residue and contains units (b) represented by the above formula (B). The units (b) preferably account for 30 mol% or more, more preferably 50 mol% or more, even more preferably 60 mol% or more, particularly preferably 65 mol% or more, and most preferably 70 mol% or more of the total carbonate units. When the repeating units (b) are at least the above lower limit based on the total carbonate units, this is preferred because the chemical resistance is improved.

[0049] (Unit (b)) The unit (b) constituting the polycarbonate resin (B) is derived from an aliphatic diol having an ether group, as shown in the formula (B) above. The formula (B) is preferably a diol having an ether bond among biomass resources, and is a material with high heat resistance and pencil hardness. Examples of the formula (B) include units (b1), (b2), and (b3) represented by the following formulas (B1), (B2), and (B3), which are stereoisomers.

[0050] [ka]

[0051] [ka]

[0052] [ka]

[0053] These are ether diols derived from carbohydrates and can also be obtained from natural biomass, making them one of the renewable resources. Units (b1), (b2), and (b3) are derived from ether diols called isosorbide, isomannide, and isoidide, respectively. Isosorbide is obtained by hydrogenating D-glucose obtained from starch and then dehydrating it. Other ether diols can also be obtained by similar reactions, except for the starting material.

[0054] Among isosorbide, isomannide and isoidide, the unit (b1) derived from isosorbide (1,4;3,6-dianhydro-D-sorbitol) is particularly preferred because of ease of production and excellent heat resistance.

[0055] (Other units (c)) The polycarbonate resin (B) preferably contains the above-mentioned unit (b) and further contains unit (c) derived from one or more compounds selected from the group consisting of an aliphatic diol compound, an alicyclic diol compound, and an aromatic dihydroxy compound, and is particularly preferably a copolymer polycarbonate resin thereof.

[0056] The total of the units (b) and the units (c) is preferably 70 mol % or more, more preferably 80 mol % or more, even more preferably 90 mol % or more, and particularly preferably 95 mol % or more, of all carbonate units.

[0057] The repeating unit (c) is preferably a repeating unit derived from at least one compound selected from the group consisting of an aliphatic diol compound and an alicyclic diol compound. The aliphatic diol compound is preferably a straight-chain aliphatic diol compound. A straight-chain aliphatic diol compound having preferably 4 to 24 carbon atoms, more preferably 6 to 20 carbon atoms, and even more preferably 8 to 12 carbon atoms is used. The alicyclic diol compound is preferably an alicyclic diol compound having preferably 6 to 24 carbon atoms, more preferably 6 to 20 carbon atoms.

[0058] Specific examples of the aliphatic diol compound include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 2-ethyl-1,6-hexanediol, 2,2,4-trimethyl-1,6-hexanediol, 1,10-decanediol, 1,12-dodecanediol, hydrogenated dilinoleyl glycol, hydrogenated dioleyl glycol, etc. Among these, 1,6-hexanediol, 1,9-nonanediol, 1,10-decanediol, and 1,12-dodecanediol are preferred, with 1,9-nonanediol, 1,10-decanediol, and 1,12-dodecanediol being particularly preferred.

[0059] Specific examples of the alicyclic diol compound include cyclohexanediols such as 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, and 2-methyl-1,4-cyclohexanediol; cyclohexanedimethanols such as 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, and 1,4-cyclohexanedimethanol; norbornanedimethanols such as 2,3-norbornanedimethanol and 2,5-norbornanedimethanol; tricyclodecane dimethanol, pentacyclopentadecanedimethanol, 1,3-adamantanediol, 2,2-adamantanediol, decalindimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane. Of these, 1,4-cyclohexanedimethanol, tricyclodecanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane are preferred.

[0060] These aliphatic diol compounds and alicyclic diol compounds may be used alone or in combination of two or more. The polycarbonate resin (B) preferably contains the above unit (b) and one or more alicyclic diol compounds and / or aliphatic diol compounds.

[0061] Examples of aromatic dihydroxy compounds include α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene (bisphenol M), 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide, bisphenol A, 2,2-bis(4-hydroxy-3-methylphenyl)propane (bisphenol C), 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane (bisphenol AF), and 1,1-bis(4-hydroxyphenyl)decane.

[0062] (composition) In the polycarbonate resin (B), the molar ratio (b) / (c) of the units (b) to the units (c) is preferably 30 / 70 to 99 / 1, more preferably 50 / 50 to 95 / 5, even more preferably 60 / 40 to 92 / 8, and particularly preferably 65 / 35 to 90 / 10. When the molar ratio (b) / (c) is within the above range, the resin exhibits excellent chemical resistance and heat resistance, and furthermore, an appropriate melt viscosity results in good moldability, resulting in excellent impact resistance. The molar ratio of the units (b) to the units (c) can be measured and calculated by proton NMR using a JEOL JNM-AL400.

[0063] The polycarbonate resin (B) preferably contains the above unit (b) and a unit (c-1) represented by the following formula (C-1).

[0064] [ka]

[0065] (In the formula, W represents an alkylene group having 1 to 20 carbon atoms or a cycloalkylene group having 6 to 20 carbon atoms, R represents a branched or linear alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 6 to 20 carbon atoms which may have a substituent, and m represents an integer of 0 to 10.)

[0066] The polycarbonate resin (B) preferably contains 5 to 70 mol %, more preferably 10 to 40 mol %, and even more preferably 15 to 30 mol % of the unit (c-1) represented by the above formula (C-1). By containing the unit (c-1) within the above range, the transparency and adhesion to the layer A are more excellent.

[0067] (Method for producing polycarbonate resin (B)) The polycarbonate resin (B) can be produced by a reaction method known per se, for example, by reacting a diol component with a carbonate precursor such as a carbonic acid diester. The basic means for these production methods will now be briefly described.

[0068] The transesterification reaction using a carbonate diester as a carbonate precursor is carried out by stirring a predetermined ratio of diol components with the carbonate diester under heating in an inert gas atmosphere, and distilling off the resulting alcohol or phenol. The reaction temperature varies depending on the boiling point of the resulting alcohol or phenol, but is typically in the range of 120 to 300°C. The reaction is completed by reducing the pressure from the beginning of the reaction to distill off the resulting alcohol or phenol. If necessary, a terminal capping agent, antioxidant, etc. may also be added.

[0069] The carbonic acid diester used in the transesterification reaction includes esters of an aryl group or an aralkyl group having 6 to 12 carbon atoms, which may be substituted. Specific examples include diphenyl carbonate, ditolyl carbonate, bis(chlorophenyl)carbonate, and m-cresyl carbonate. Of these, diphenyl carbonate is particularly preferred. The amount of diphenyl carbonate used is preferably 0.97 to 1.10 mol, more preferably 1.00 to 1.06 mol, per mol of the total amount of dihydroxy compounds.

[0070] In the melt polymerization method, a polymerization catalyst can be used to increase the polymerization rate. Examples of such a polymerization catalyst include alkali metal compounds, alkaline earth metal compounds, basic phosphorus compounds, and metal compounds. Among these, alkali metals or alkaline earth metals are preferred as the polymerization catalyst. Among alkali metal compounds, sodium hydroxide and sodium bicarbonate are particularly preferred. Furthermore, among alkaline earth metal compounds, calcium carbonate and barium stearate are particularly preferred.

[0071] The amount of the polymerization catalyst used is preferably 1×10 -9 ~1×10 -2 equivalent, preferably 1 x 10 -8 ~1×10 -5 equivalent, more preferably 1 x 10 -7 ~1×10 -3 It is selected within the range of equivalents.

[0072] A catalyst deactivator can also be added in the latter stage of the reaction. Known catalyst deactivators are effectively used as the catalyst deactivator, but among these, ammonium salts and phosphonium salts of sulfonic acid are preferred. Salts of dodecylbenzenesulfonic acid, such as tetrabutylphosphonium dodecylbenzenesulfonate, and salts of paratoluenesulfonic acid, such as tetrabutylammonium paratoluenesulfonate, are more preferred. Furthermore, preferred sulfonic acid esters include methyl benzenesulfonate, ethyl benzenesulfonate, butyl benzenesulfonate, octyl benzenesulfonate, phenyl benzenesulfonate, methyl paratoluenesulfonate, ethyl paratoluenesulfonate, butyl paratoluenesulfonate, octyl paratoluenesulfonate, and phenyl paratoluenesulfonate.

[0073] Among these, tetrabutylphosphonium dodecylbenzenesulfonate is most preferably used.

[0074] When at least one polymerization catalyst selected from alkali metal compounds and / or alkaline earth metal compounds is used, the amount of these catalyst deactivators used is preferably 0.5 to 50 mol, more preferably 0.5 to 10 mol, and even more preferably 0.8 to 5 mol, per mol of the catalyst.

[0075] (Specific viscosity:η SP ) Specific viscosity (η) of polycarbonate resin (B) SP ) is preferably 0.2 to 0.5, more preferably 0.22 to 0.49, and even more preferably 0.24 to 0.48. When the specific viscosity of the polycarbonate resin (B) is within the above range, the strength is sufficient and the moldability is good.

[0076] The specific viscosity of the polycarbonate resin in the present invention can be determined using an Ostwald viscometer from a solution prepared by dissolving 0.7 g of the resin in 100 ml of methylene chloride at 20°C. Specific viscosity (η SP )=(t-t0) / t0 [t0 is the number of seconds that methylene chloride falls, and t is the number of seconds that the sample solution falls] The specific viscosity can be measured as follows: First, polycarbonate resin is dissolved in methylene chloride in an amount 20 to 30 times its weight, and the soluble matter is collected by filtration through Celite. The solution is then removed and the mixture is thoroughly dried to obtain a solid soluble in methylene chloride. 0.7 g of this solid is dissolved in 100 ml of methylene chloride, and the specific viscosity at 20°C is determined using an Ostwald viscometer.

[0077] (glass transition temperature: Tg) The glass transition temperature (Tg) of the polycarbonate resin (B) is preferably 80 to 150° C., more preferably 90 to 140° C., and even more preferably 100 to 130° C. If Tg is within the above range, the heat resistance and moldability are good, which is preferable.

[0078] The glass transition temperature (Tg) is measured using a 2910 DSC manufactured by TA Instruments Japan Co., Ltd., in accordance with JIS K7121 at a heating rate of 20°C / min.

[0079] (Pencil hardness) The polycarbonate resin (B) preferably has a pencil hardness of HB or higher, more preferably F or higher. From the viewpoint of excellent scratch resistance, a pencil hardness of H or higher is even more preferable. A pencil hardness of 4H or lower provides sufficient functionality. Pencil hardness can be increased by increasing the weight ratio of the acrylic resin. Pencil hardness refers to the hardness at which the resin of the present invention leaves no scratch marks when scratched with a pencil having a specific pencil hardness. The pencil hardness used in the surface hardness test for coating films, which can be measured according to JIS K-5600, is preferably used as an index. Pencil hardness decreases in the following order: 9H, 8H, 7H, 6H, 5H, 4H, 3H, 2H, H, F, HB, B, 2B, 3B, 4B, 5B, and 6B, with the hardest being 9H and the softest being 6B.

[0080] (additives) The polycarbonate resin (B) may be blended with additives such as other thermoplastic resins, heat stabilizers, plasticizers, light stabilizers, polymerized metal deactivators, flame retardants, lubricants, antistatic agents, surfactants, antibacterial agents, ultraviolet absorbers, mold release agents, colorants, and impact modifiers, depending on the intended use and as needed.

[0081] (heat stabilizer) The polycarbonate resin (A) and polycarbonate resin (B) used in the present invention preferably contain a heat stabilizer, in particular, to suppress a decrease in molecular weight and deterioration in color during extrusion and molding. Examples of heat stabilizers include phosphorus-based heat stabilizers, phenol-based heat stabilizers, and sulfur-based heat stabilizers, and these can be used alone or in combination of two or more. In particular, it is preferable to contain a phosphorus-based heat stabilizer. As the phosphorus-based stabilizer, it is preferable to blend a phosphite compound. Examples of phosphite compounds include pentaerythritol-type phosphite compounds, phosphite compounds that react with dihydric phenols to form a cyclic structure, and phosphite compounds with other structures.

[0082] Specific examples of the pentaerythritol phosphite compounds include distearyl pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-ethylphenyl)pentaerythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, and dicyclohexyl pentaerythritol diphosphite. Of these, distearyl pentaerythritol diphosphite and bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite are preferred.

[0083] Examples of the phosphite compounds having a cyclic structure that react with the above dihydric phenols include 2,2'-methylenebis(4,6-di-tert-butylphenyl)(2,4-di-tert-butylphenyl)phosphite, 2,2'-methylenebis(4,6-di-tert-butylphenyl)(2-tert-butyl-4-methylphenyl)phosphite, 2,2'-methylenebis(4-methyl-6-tert-butylphenyl)(2-tert-butyl-4-methylphenyl)phosphite, phosphite, 2,2'-ethylidenebis(4-methyl-6-tert-butylphenyl)(2-tert-butyl-4-methylphenyl)phosphite, 2,2'-methylene-bis-(4,6-di-t-butylphenyl)octylphosphite, 6-tert-butyl-4-[3-[(2,4,8,10)-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepin-6-yl)oxy]propyl]-2-methylphenol, and the like.

[0084] Examples of phosphite compounds having the above other structures include triphenyl phosphite, tris(nonylphenyl)phosphite, tridecyl phosphite, trioctyl phosphite, trioctadecyl phosphite, didecyl monophenyl phosphite, dioctyl monophenyl phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, 2,2-methylenebis(4,6-di-tert-butylphenyl)octyl phosphite, tris(diethylphenyl)phosphite, tris(di-isopropylphenyl)phosphite, tris(di-n-butylphenyl)phosphite, tris(2,4-di-tert-butylphenyl)phosphite, and tris(2,6-di-tert-butylphenyl)phosphite.

[0085] In addition to the various phosphite compounds, examples of the compounds include phosphate compounds, phosphonite compounds, and phosphonate compounds.

[0086] Examples of the phosphate compound include tributyl phosphate, trimethyl phosphate, tricresyl phosphate, triphenyl phosphate, trichlorophenyl phosphate, triethyl phosphate, diphenyl cresyl phosphate, diphenyl monoorthoxenyl phosphate, tributoxyethyl phosphate, dibutyl phosphate, dioctyl phosphate, and diisopropyl phosphate, and preferred are triphenyl phosphate and trimethyl phosphate.

[0087] Examples of phosphonite compounds include tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,4-di-tert-butylphenyl)-4,3'-biphenylene diphosphonite, tetrakis(2,4-di-tert-butylphenyl)-3,3'-biphenylene diphosphonite, tetrakis(2,6-di-tert-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,6-di-tert-butylphenyl)-4,3'-biphenylene diphosphonite, tetrakis(2,6-di-tert-butylphenyl)-3,3'-biphenylene diphosphonite, bis(2,4-di-tert-butylphenyl)-4-phenyl ... Examples include (2,4-di-tert-butylphenyl)-3-phenyl-phenylphosphonite, bis(2,6-di-n-butylphenyl)-3-phenyl-phenylphosphonite, bis(2,6-di-tert-butylphenyl)-4-phenyl-phenylphosphonite, and bis(2,6-di-tert-butylphenyl)-3-phenyl-phenylphosphonite. Tetrakis(di-tert-butylphenyl)-biphenylene diphosphonite and bis(di-tert-butylphenyl)-phenyl-phenylphosphonite are preferred, with tetrakis(2,4-di-tert-butylphenyl)-biphenylene diphosphonite and bis(2,4-di-tert-butylphenyl)-phenyl-phenylphosphonite being more preferred. Such phosphonite compounds can be used in combination with, and are preferred for, the above-mentioned phosphite compounds having an aryl group substituted with two or more alkyl groups.

[0088] Examples of the phosphonate compound include dimethyl benzenephosphonate, diethyl benzenephosphonate, and dipropyl benzenephosphonate.

[0089] Among the above phosphorus-based heat stabilizers, trisnonylphenyl phosphite, trimethyl phosphate, tris(2,4-di-tert-butylphenyl) phosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, and bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite are preferably used.

[0090] The above phosphorus-based heat stabilizers can be used alone or in combination of two or more. The phosphorus-based heat stabilizer is preferably blended in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.5 parts by weight, and even more preferably 0.01 to 0.3 parts by weight per 100 parts by weight of the polycarbonate resin.

[0091] To the polycarbonate resin (A) and polycarbonate resin (B) used in the present invention, a hindered phenol-based heat stabilizer or a sulfur-based heat stabilizer may be added in combination with a phosphorus-based heat stabilizer as a heat stabilizer, in order to suppress a decrease in molecular weight and deterioration in color during extrusion and molding.

[0092] The hindered phenol-based heat stabilizer is not particularly limited as long as it has an antioxidant function, and examples thereof include n-octadecyl-3-(4'-hydroxy-3',5'-di-t-butylphenyl)propionate, tetrakis{methylene-3-(3',5'-di-t-butyl-4-hydroxyphenyl)propionate}methane, distearyl(4-hydroxy-3-methyl-5-t-butylbenzyl)malonate, triethyleneglycol-bis{3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate}, 1,6-hexanediol-bis{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate}, pentaerythrityl-tetrakis{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate}, 2,2- Thiodiethylene bis{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate}, 2,2-thiobis(4-methyl-6-t-butylphenol), 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate, 2,4-bis{(octyl thio)methyl}-o-cresol, isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, 2,5,7,8-tetramethyl-2(4',8',12'-trimethyltridecyl)chroman-6-ol, 3,3',3",5,5',5"-hexa-t-butyl-a,a',a"-(mesitylene-2,4,6-triyl)tri-p-cresol, and the like.

[0093] Among these, n-octadecyl-3-(4'-hydroxy-3',5'-di-t-butylphenyl)propionate, pentaerythrityl-tetrakis{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate}, 3,3',3",5,5',5"-hexa-t-butyl-a,a',a'-(mesitylene-2,4,6-triyl)tri-p-cresol, 2,2-thiodiethylenebis{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate}, and the like are preferred.

[0094] These hindered phenol-based heat stabilizers may be used alone or in combination of two or more.

[0095] The hindered phenol-based heat stabilizer is preferably blended in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.5 parts by weight, and even more preferably 0.01 to 0.3 parts by weight per 100 parts by weight of the polycarbonate resin.

[0096] Examples of sulfur-based heat stabilizers include dilauryl-3,3'-thiodipropionate, ditridecyl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, laurylstearyl-3,3'-thiodipropionate, pentaerythritol tetrakis(3-laurylthiopropionate), bis[2-methyl-4-(3-laurylthiopropionyloxy)-5-tert-butylphenyl]sulfide, octadecyl disulfide, mercaptobenzimidazole, 2-mercapto-6-methylbenzimidazole, and 1,1'-thiobis(2-naphthol). Of these, pentaerythritol tetrakis(3-laurylthiopropionate) is preferred.

[0097] These sulfur-based heat stabilizers may be used alone or in combination of two or more.

[0098] The sulfur-based heat stabilizer is preferably blended in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.5 parts by weight, and even more preferably 0.01 to 0.3 parts by weight per 100 parts by weight of the polycarbonate resin.

[0099] When a phosphite-based heat stabilizer, a phenol-based heat stabilizer, and a sulfur-based heat stabilizer are used in combination, the total amount of these is preferably 0.001 to 1 part by weight, more preferably 0.01 to 0.3 part by weight, per 100 parts by weight of the polycarbonate resin.

[0100] (mold release agent) The polycarbonate resin (A) and the polycarbonate resin (B) used in the present invention may contain a mold release agent to further improve releasability from a mold during melt molding, within the scope of the present invention.

[0101] Examples of such release agents include higher fatty acid esters of monohydric or polyhydric alcohols, higher fatty acids, paraffin wax, beeswax, olefin-based waxes, olefin-based waxes containing carboxy groups and / or carboxylic anhydride groups, silicone oils, and organopolysiloxanes.

[0102] The higher fatty acid ester is preferably a partial or full ester of a monohydric or polyhydric alcohol having 1 to 20 carbon atoms with a saturated fatty acid having 10 to 30 carbon atoms. Examples of such partial or full esters of a monohydric or polyhydric alcohol with a saturated fatty acid include stearic acid monoglyceride, stearic acid diglyceride, stearic acid triglyceride, stearate monosorbitate, stearyl stearate, behenic acid monoglyceride, behenyl behenate, pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythritol tetrapelargonate, propylene glycol monostearate, stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, isopropyl palmitate, biphenyl biphenate, sorbitan monostearate, and 2-ethylhexyl stearate.

[0103] Among these, stearic acid monoglyceride, stearic acid triglyceride, pentaerythritol tetrastearate, and behenyl behenate are preferably used.

[0104] The higher fatty acid is preferably a saturated fatty acid having 10 to 30 carbon atoms. Examples of such fatty acids include myristic acid, lauric acid, palmitic acid, stearic acid, and behenic acid.

[0105] These release agents may be used alone or in combination of two or more. The amount of such release agent to be added is preferably 0.01 to 5 parts by weight per 100 parts by weight of the polycarbonate resin.

[0106] (ultraviolet absorber) The polycarbonate resin (A) and the polycarbonate resin (B) used in the present invention may contain an ultraviolet absorber, such as a benzotriazole-based ultraviolet absorber, a benzophenone-based ultraviolet absorber, a triazine-based ultraviolet absorber, a cyclic iminoester-based ultraviolet absorber, or a cyanoacrylate-based ultraviolet absorber, with benzotriazole-based ultraviolet absorbers being preferred.

[0107] Examples of the benzotriazole-based ultraviolet absorber include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, 2-(2'-hydroxy-3'-dodecyl-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-bis(α,α'-dimethylbenzyl)phenylbenzotriazole, 2-[2'-hydroxy and benzotriazole-based ultraviolet absorbers typified by 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2,2'methylenebis[4-(1,1,3,3-tetramethylbutyl)-6-(2H-benzotriazol-2-yl)phenol], and methyl-3-[3-tert-butyl-5-(2H-benzotriazol-2-yl)-4-hydroxyphenylpropionate-polyethylene glycol condensates.

[0108] The blending ratio of such an ultraviolet absorber is preferably 0.03 to 2.5 parts by weight, more preferably 0.1 to 2 parts by weight, and even more preferably 0.2 to 1.5 parts by weight, relative to 100 parts by weight of the polycarbonate resin.

[0109] (light stabilizer) The polycarbonate resin (A) and the polycarbonate resin (B) used in the present invention may contain a light stabilizer, which has the advantages of improving weather resistance and making molded articles less susceptible to cracking.

[0110] Examples of light stabilizers include 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate, didecanoic acid bis(2,2,6,6-tetramethyl-1-octyloxy-4-piperidinyl) ester, bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate, 2,4-bis[N-butyl-N-(1-cyclohexyloxy-2,2,6,6- Tetramethylpiperidin-2-yl)amino]-6-(2-hydroxyethylamine)-1,3,5-triazine, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, bis(2,2,6,6-tetramethyl-4-piperidyl)carbonate, bis(2,2,6,6-tetramethyl-4-piperidyl)succinate, bis(2,2,6,6-tetramethyl -4-piperidyl) sebacate, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 4-octanoyloxy-2,2,6,6-tetramethylpiperidine, bis(2,2,6,6-tetramethyl-4-piperidyl)diphenylmethane-p,p'-dicarbamate, bis(2,2,6,6-tetramethyl-4-piperidyl)benzene-1,3-disulfonate, bis(2,2,6,6-tetramethyl-4-piperidyl)phenylphosphite, etc. Examples of the light stabilizer include hindered amines such as nickel bis(octylphenyl sulfide), nickel complexes such as nickel complex-3,5-di-t-butyl-4-hydroxybenzyl phosphate monoethylate, and nickel dibutyldithiocarbamate. These light stabilizers may be used alone or in combination of two or more. The content of the light stabilizer is preferably 0.001 to 1 part by weight, more preferably 0.01 to 0.5 parts by weight, based on 100 parts by weight of the polycarbonate resin.

[0111] (epoxy stabilizer) In order to improve hydrolysis resistance, the polycarbonate resin (A) and the polycarbonate resin (B) used in the present invention may contain an epoxy compound within a range that does not impair the object of the present invention.

[0112] Epoxy stabilizers include epoxidized soybean oil, epoxidized linseed oil, phenyl glycidyl ether, allyl glycidyl ether, t-butylphenyl glycidyl ether, 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylcarboxylate, 3,4-epoxy-6-methylcyclohexylmethyl-3',4'-epoxy-6'-methylcyclohexylcarboxylate, 2,3-epoxycyclohexylmethyl-3',4'-epoxycyclohexylcarboxylate, 4-(3,4-epoxy-5-methylcyclohexyl) ... butyl-3',4'-epoxycyclohexylcarboxylate, 3,4-epoxycyclohexylethylene oxide, cyclohexylmethyl-3,4-epoxycyclohexylcarboxylate, 3,4-epoxy-6-methylcyclohexylmethyl-6'-methylcyclohexylcarboxylate, bisphenol A diglycidyl ether, tetrabromobisphenol A glycidyl ether, diglycidyl ester of phthalic acid, diglycidyl ester of hexahydrophthalic acid, bis-epoxydicyclopentadienyl ether, bis-epoxyethylene ethylene glycol, bis-epoxycyclohexyl adipate, butadiene diepoxide, tetraphenylethylene epoxide, octyl epoxythalate, epoxidized polybutadiene, 3,4-dimethyl-1,2-epoxycyclohexane, 3,5-dimethyl-1,2-epoxycyclohexane, 3-methyl-5-t-butyl-1,2-epoxycyclohexane, octadecyl-2,2-dimethyl-3,4-epoxycyclohexylcarboxylate, N-butyl-2,2-dimethyl-3,4-epoxycyclohexylcarboxylate, cyclohexyl- 2-Methyl-3,4-epoxycyclohexyl carboxylate, N-butyl-2-isopropyl-3,4-epoxy-5-methylcyclohexyl carboxylate, octadecyl-3,4-epoxycyclohexyl carboxylate, 2-ethylhexyl-3',4'-epoxycyclohexyl carboxylate, 4,6-dimethyl-2,3-epoxycyclohexyl-3',4'-epoxycyclohexyl carboxylate, 4,5-epoxytetrahydrophthalic anhydride, 3-t-butyl-4,5-epoxytetrahydrophthalic anhydride, diethyl-4,Examples include 5-epoxy-cis-1,2-cyclohexyldicarboxylate and di-n-butyl-3-t-butyl-4,5-epoxy-cis-1,2-cyclohexyldicarboxylate. Bisphenol A diglycidyl ether is preferred from the standpoint of compatibility.

[0113] Such an epoxy-based stabilizer is preferably blended in an amount of 0.0001 to 5 parts by weight, more preferably 0.001 to 1 part by weight, and even more preferably 0.005 to 0.5 part by weight, relative to 100 parts by weight of polycarbonate resin.

[0114] (Bluing agent) The polycarbonate resin (A) and polycarbonate resin (B) used in the present invention can be blended with a bluing agent to counteract the yellow color of the lens due to the polymer or ultraviolet absorber. Any bluing agent that is used for polycarbonate can be used without any particular problems. Generally, anthraquinone dyes are easily available and are therefore preferred.

[0115] Specific examples of bluing agents include Solvent Violet 13 (CA No. (Color Index No.) 60725), Solvent Violet 31 (CA No. 68210), Solvent Violet 33 (CA No. 60725), Solvent Blue 94 (CA No. 61500), Solvent Violet 36 (CA No. 68210), Solvent Blue 97 (Macrolex Violet RR, manufactured by Bayer), and Solvent Blue 45 (CA No. 61110).

[0116] These bluing agents may be used alone or in combination of two or more. These bluing agents are preferably used in an amount of 0.1 × 10 -4 ~2×10 -4 It is blended in a ratio of parts by weight.

[0117] (Flame retardant) The polycarbonate resin (A) and the polycarbonate resin (B) used in the present invention may also contain a flame retardant. Examples of the flame retardant include halogen-based flame retardants such as brominated epoxy resin, brominated polystyrene, brominated polycarbonate, brominated polyacrylate, and chlorinated polyethylene; phosphate ester-based flame retardants such as monophosphate compounds and phosphate oligomer compounds; organic phosphorus-based flame retardants other than phosphate ester-based flame retardants such as phosphinate compounds, phosphonate compounds, phosphonitrile oligomer compounds, and phosphonic acid amide compounds; organic metal salt-based flame retardants such as organic alkali (earth) metal sulfonates, metal borate-based flame retardants, and metal stannate-based flame retardants; silicone-based flame retardants, ammonium polyphosphate-based flame retardants, and triazine-based flame retardants. Additionally, a flame retardant auxiliary (for example, sodium antimonate, antimony trioxide, etc.) or an anti-dripping agent (such as fibril-forming polytetrafluoroethylene) may be blended and used in combination with the flame retardant.

[0118] Among the above-mentioned flame retardants, compounds that do not contain chlorine atoms or bromine atoms are more suitable as flame retardants for the molded article of the present invention, which is characterized by reduced environmental impact, because they reduce factors that make them undesirable when incinerated or thermally recycled.

[0119] When a flame retardant is added, the amount is preferably in the range of 0.05 to 50 parts by weight per 100 parts by weight of polycarbonate resin. At 0.05 part by weight or more, sufficient flame retardancy is exhibited, and at 50 parts by weight or less, the strength and heat resistance of the molded product are excellent.

[0120] (elastic polymer) The polycarbonate resin (A) and polycarbonate resin (B) used in the present invention can contain, as an impact modifier, an elastic polymer other than the thermoplastic elastomers described above. Examples of the elastic polymer include natural rubber or a graft copolymer in which a rubber component having a glass transition temperature of 10°C or less is copolymerized with one or more monomers selected from aromatic vinyl, vinyl cyanide, acrylic ester, methacrylic ester, and vinyl compounds copolymerizable therewith. More preferred elastic polymers are core-shell graft copolymers in which a shell of one or more of the above monomers is graft copolymerized onto a core of the rubber component.

[0121] Also included are block copolymers of such rubber components and the above-mentioned monomers. Specific examples of such block copolymers include thermoplastic elastomers such as styrene-ethylene-propylene-styrene elastomers (hydrogenated styrene-isoprene-styrene elastomers) and hydrogenated styrene-butadiene-styrene elastomers. Furthermore, various elastic polymers known as thermoplastic elastomers, such as polyurethane elastomers, polyester elastomers, and polyetheramide elastomers, can also be used.

[0122] A core-shell type graft copolymer is more suitable as an impact improver. In the core-shell type graft copolymer, the particle size of the core is preferably 0.05 to 0.8 μm, more preferably 0.1 to 0.6 μm, and even more preferably 0.1 to 0.5 μm, in terms of weight average particle size. If the particle size is in the range of 0.05 to 0.8 μm, better flex resistance can be achieved. The elastomeric polymer preferably contains 40% or more of a rubber component, and more preferably 60% or more.

[0123] Examples of rubber components include butadiene rubber, butadiene-acrylic composite rubber, acrylic rubber, acrylic-silicone composite rubber, isobutylene-silicone composite rubber, isoprene rubber, styrene-butadiene rubber, chloroprene rubber, ethylene-propylene rubber, nitrile rubber, ethylene-acrylic rubber, silicone rubber, epichlorohydrin rubber, fluororubber, and rubbers thereof with hydrogen added to the unsaturated bonds. However, due to concerns about the generation of harmful substances during combustion, rubber components that do not contain halogen atoms are preferred in terms of environmental impact.

[0124] The glass transition temperature of the rubber component is preferably -10°C or lower, more preferably -30°C or lower, and the rubber component is particularly preferably butadiene rubber, butadiene-acrylic composite rubber, acrylic rubber, or acrylic-silicone composite rubber. Composite rubber refers to rubber obtained by copolymerizing two types of rubber components or rubber polymerized to form an IPN structure in which the components are inseparably entangled with each other.

[0125] Examples of aromatic vinyl compounds in the vinyl compounds copolymerized with the rubber component include styrene, α-methylstyrene, p-methylstyrene, alkoxystyrene, and halogenated styrene, with styrene being particularly preferred. Examples of acrylic esters include methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, and octyl acrylate. Examples of methacrylic esters include methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, and octyl methacrylate, with methyl methacrylate being particularly preferred. Among these, it is preferable to include methacrylic esters such as methyl methacrylate as an essential component. More specifically, the methacrylic ester is preferably contained in an amount of 10% by weight or more, more preferably 15% by weight or more, based on 100% by weight of the graft component (or 100% by weight of the shell in the case of a core-shell polymer).

[0126] Elastic polymers containing a rubber component with a glass transition temperature of 10°C or lower may be produced by any of the following polymerization methods: bulk polymerization, solution polymerization, suspension polymerization, and emulsion polymerization. The copolymerization method may be either single-stage or multi-stage grafting. They may also be a mixture with a copolymer of only the graft component, a by-product of production. Polymerization methods include conventional emulsion polymerization, soap-free polymerization using an initiator such as potassium persulfate, seed polymerization, and two-stage swelling polymerization. In suspension polymerization, the aqueous phase and the monomer phase are kept separate and precisely fed into a continuous disperser, with the particle size controlled by the rotation speed of the disperser. In continuous production, the particle size can be controlled by feeding the monomer phase into an aqueous liquid with dispersibility through a small orifice or porous filter with a diameter of several to several tens of micrometers. In the case of core-shell graft polymers, the reaction may be single-stage or multi-stage for both the core and shell.

[0127] Such elastic polymers are commercially available and easily available. For example, examples of those containing butadiene rubber, acrylic rubber, or butadiene-acrylic composite rubber as the main rubber component include Kane Ace B series (e.g., B-56) from Kanegafuchi Chemical Industry Co., Ltd., Metablen C series (e.g., C-223A) and W series (e.g., W-450A) from Mitsubishi Rayon Co., Ltd., Paraloid EXL series (e.g., EXL-2602), HIA series (e.g., HIA-15), BTA series (e.g., BTA-III), and KCA series from Kureha Chemical Industry Co., Ltd., Paraloid EXL series and KM series (e.g., KM-336P, KM-357P) from Rohm and Haas, and UCL Modifier Resin series from Ube Cycon Co., Ltd. (UMG ABS Co., Ltd.). AXS Resin series), and products with an acrylic-silicone composite rubber as the main rubber component include those sold by Mitsubishi Rayon Co., Ltd. under the trade names Metablen S-2001 or SRK-200.

[0128] The composition ratio of the impact improver is preferably 0.2 to 50 parts by weight, more preferably 1 to 30 parts by weight, and more preferably 1.5 to 20 parts by weight per 100 parts by weight of the polycarbonate resin. This composition range can impart good flex resistance to the composition while suppressing a decrease in rigidity.

[0129] (carbodiimide) The polycarbonate resin (A) and polycarbonate resin (B) used in the present invention preferably contain a carbodiimide to prevent deterioration of color in a humid and hot environment. The carbodiimide is not particularly limited as long as it is a compound having an "-N=C=N-" structure in the molecule. Examples of carbodiimide compounds include monocarbodiimide compounds, polycarbodiimide compounds, and cyclic carbodiimide compounds, all of which are widely known and can be used. Examples of carbodiimide compounds include those described in, for example, JP-A-9-309871, JP-A-9-249801, JP-A-9-208649, JP-A-9-296097, JP-A-8-81,533, JP-A-8-27092, JP-A-9-136869, JP-A-9-124582, JP-A-9-188807, and JP-A-2005-82642. , JP 2005-53870 A, JP 2012-36392 A, JP 2010-163203 A, JP 2011-174094 A, WO2008 / 072514 A, WO2010 / 071211 A, JP 2012-81759 A, JP 2012-52014 A, JP 2012-7079 A, ​​and the like.

[0130] The molecular weight of the carbodiimide is preferably 150 or more, more preferably 185 or more, and even more preferably 200 or more. Within this range, not only is moisture resistance improved but also good storage stability is obtained. Furthermore, the molecular weight of the carbodiimide is preferably 13,000 or less, more preferably 8,000 or less, and even more preferably 4,000 or less. Within this range, excellent compatibility with polycarbonate resins and acrylic resins is achieved, and excellent transparency is obtained when a molded product is formed, which is preferable.

[0131] In this specification, when the carbodiimide is a polymer, the molecular weight of the carbodiimide refers to the "mass average molecular weight." Here, the mass average molecular weight of the carbodiimide is the polystyrene-equivalent mass average molecular weight measured by gel permeation chromatography (GPC). Specifically, the polystyrene-equivalent mass average molecular weight of the carbodiimide can be measured using an LC-9A / RID-6A measuring device manufactured by Shimadzu Corporation, a Shodex K-800P / K-804L / K-804L column manufactured by Showa Denko K.K., and chloroform or the like as the mobile phase at a column temperature of 40°C, and calculated using a calibration curve of standard polystyrene.

[0132] As the carbodiimide, any of monocarbodiimides, polycarbodiimides and cyclic carbodiimides can be used, but cyclic carbodiimides and polycarbodiimides are more preferred.

[0133] As the polycarbodiimide, commercially available products may be used, such as aliphatic polycarbodiimide ("HMV-8CA" and "LA-1" manufactured by Nisshinbo Chemical Inc.) and carbodiimide-modified isocyanate ("Carbodilite V-05" manufactured by Nisshinbo Chemical Inc.) etc. Among these, aliphatic polycarbodiimide ("HMV-8CA" and "LA-1" manufactured by Nisshinbo Chemical Inc.) is preferred.

[0134] (Method of manufacturing laminate) The laminate of the present invention can be produced by known methods such as coextrusion, extrusion lamination, thermal lamination, dry lamination, etc. Among these, the coextrusion method is particularly preferred.

[0135] In the case of coextrusion, the resins constituting each layer of the laminate and additives are extruded using multiple extruders, and the resins are merged through a feed block or a multi-manifold die to form a laminate. To further improve the strength and impact resistance of the laminate, the laminate obtained in the above process can be stretched uniaxially or biaxially by a roll method, tenter method, tubular method, etc.

[0136] (Laminate properties and uses) The thickness of the laminate of the present invention is preferably in the range of 0.05 to 10.0 mm, more preferably in the range of 0.1 to 5.0 mm, even more preferably in the range of 0.15 to 3.0 mm, particularly preferably in the range of 0.2 to 2.0 mm, and most preferably in the range of 0.25 to 1.0 mm.

[0137] In the laminate of the present invention, the thickness of Layer B is preferably 10 μm or more, more preferably 15 μm or more, and even more preferably 20 μm or more, and is preferably 500 μm or less, more preferably 300 μm or less, still more preferably 200 μm or less, particularly preferably 100 μm or less, and most preferably 80 μm or less. If the thickness of Layer B is within the above range, it can have excellent heat resistance, as well as excellent flexibility, chemical resistance, and scratch resistance.

[0138] The laminate of the present invention has excellent transparency, and its visible light transmittance is preferably 85% or more, more preferably 87% or more, even more preferably 88% or more, particularly preferably 89% or more, and most preferably 90% or more. Furthermore, the haze of the laminate is preferably 2.0% or less, more preferably 1.5% or less, even more preferably 1.0% or less, and particularly preferably 0.5% or less.

[0139] (Surface treatment) The laminate of the present invention can be subjected to various surface treatments. Surface treatments referred to here are those that form a new layer on the surface of a resin molded product, such as vapor deposition (physical vapor deposition, chemical vapor deposition, etc.), plating (electroplating, electroless plating, hot-dip plating, etc.), painting, coating, and printing, and commonly used methods can be applied. Specific examples of surface treatments include hard coating, water-repellent and oil-repellent coating, ultraviolet-absorbing coating, infrared-absorbing coating, and metallizing (vapor deposition, etc.). Hard coating is a particularly preferred and necessary surface treatment.

[0140] The laminate of the present invention has excellent transparency, chemical resistance, surface hardness, flexibility, and adhesion. Therefore, the uses of the laminate of the present invention are not particularly limited, and it can be used, for example, as a transparent sheet for building materials, interior parts, display covers, etc., a sheet for resin-coated metal plates, a sheet for molding (vacuum / pressure molding, hot press molding, etc.), a colored plate, a transparent plate, a shrink film, a shrink label, a shrink tube, an automobile interior material, a resin glazing, a component for home appliances, a component for office automation equipment, etc. [Example]

[0141] The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto. In the examples, "parts" means "parts by weight." The resins used in the examples and the evaluation methods are as follows.

[0142] 1. Polymer composition ratio (NMR) Each repeating unit was measured by proton NMR using JNM-AL400 manufactured by JEOL Ltd., and the polymer composition ratio (molar ratio) was calculated.

[0143] 2. Specific viscosity The viscosity was measured using an Ostwald viscometer from a solution of 0.7 g of polycarbonate resin dissolved in 100 ml of methylene chloride at 20°C. Specific viscosity (η SP )=(t-t0) / t0 [t0 is the number of seconds that methylene chloride falls, and t is the number of seconds that the sample solution falls]

[0144] 3. Heat resistance (glass transition temperature) The measurement was carried out using a TA Instruments DSC (Model DSC2910) by heating approximately 10 mg of pellets at a heating rate of 20°C / min.

[0145] 4. Scratch resistance (gloss) The test was carried out using a rubbing tester IMC-1507 manufactured by Imoto Manufacturing Co., Ltd., with steel wool (#0000) and a load of 1 kg, with 20 strokes back and forth. After the test, the reflectance at 20° was evaluated using a handy gloss meter manufactured by Nippon Denshoku Industries Co., Ltd. ◎: Reflectance change is 70% or less ○: The change in reflectance is more than 70% and less than 90% △: Reflectance change is over 90% and 120% or less ×: Change in reflectance exceeds 120%

[0146] 5. Chemical resistance A sheet sample was cut to 50 x 50 mm, and a commonly available sunscreen cream (Neutrogena) was evenly applied to the surface of the film and sheet (film layer side) sample. After heat treatment at 80°C for 4 hours, the surface was washed with a neutral detergent and wiped with a cloth. The haze of the film surface appearance was then measured and evaluated using a Nippon Denshoku Industries Co., Ltd. Haze Meter SH-7000 under conditions of a D65 light source and 10°. ◎: Haze change is 20% or less ○: Haze change is more than 20% and 35% or less △: Haze change is over 35% and 45% or less ×: Change in haze exceeds 45%

[0147] 6. Adhesion The melt-co-extruded sheet sample was cut into 50 x 50 mm pieces, and 100 squares of 1 mm width were scratched using the cross-cut method from the surface of the sheet (film layer side) to the interface layer, and tape was attached to the squares and peeled off. 〇: No peeling in all 100 squares ×: Peeling of one or more squares occurs

[0148] 7.Transparency The sheet sample was cut into a size of 50 x 50 mm, and the transmittance was measured and evaluated using a haze meter SH-7000 manufactured by Nippon Denshoku Industries Co., Ltd. under conditions of a D65 light source and an angle of 10°.

[0149] 8. Flexibility The film and melt-co-extruded sheet samples were cut into 50 x 50 mm pieces, and folded at 180° so that both ends met, and the change in the bent portion was observed. 〇: Does not break ×: Break

[0150] [Polycarbonate resin (A)] (Example): PC / Elastomer 1: Polycarbonate resin pellets (Panlite L-1250 manufactured by Teijin Limited) and a polyester-based thermoplastic elastomer were each pre-dried in advance, mixed in a V-type blender so that the polycarbonate resin / polyester-based thermoplastic elastomer ratio was 90 / 10 (by weight), and then extruded into pellets using a twin-screw extruder at a cylinder temperature of 260°C.

[0151] PC / Elastomer 2: Polycarbonate resin pellets (Panlite L-1250 manufactured by Teijin Limited) and a polyester-based thermoplastic elastomer were each pre-dried in advance and mixed in a V-type blender so that the polycarbonate resin / polyester-based thermoplastic elastomer ratio was 80 / 20 (wt%). The mixture was then extruded into pellets using a twin-screw extruder at a cylinder temperature of 260°C.

[0152] PC / Elastomer 3: Polycarbonate resin pellets (Panlite L-1250 manufactured by Teijin Limited) and a polyester-based thermoplastic elastomer were each pre-dried in advance, mixed in a V-type blender so that the polycarbonate resin / polyester-based thermoplastic elastomer ratio was 95 / 5 (wt%), and then extruded into pellets using a twin-screw extruder at a cylinder temperature of 260°C.

[0153] [Polycarbonate resin (B)] (Example) ISS-PC1: Structural units derived from isosorbide (hereinafter referred to as ISS) / structural units derived from 1,9-nonanediol (hereinafter referred to as ND) = 88 / 12 (mol%), specific viscosity 0.366 (Manufacturing method) 445 parts of ISS, 67 parts of ND, 750 parts of diphenyl carbonate (hereinafter abbreviated as DPC), and 0.0025 parts of barium stearate as a catalyst were heated to 120 ° C. and melted under a nitrogen atmosphere. The mixture was then transferred to a reaction vessel, the condenser's heat medium temperature was adjusted to 40 ° C., the resin internal temperature was adjusted to 170 ° C., and the vacuum was adjusted to 13.4 kPa over 30 minutes. The vacuum was then adjusted to 3.4 kPa over 20 minutes and maintained at that temperature for 10 minutes. The vacuum was then further reduced to 0.9 kPa over 30 minutes, the resin internal temperature was adjusted to 180 ° C., and maintained at that temperature for 10 minutes. After that, the vacuum was reduced to 0.2 kPa, and the resin temperature was increased from 180 ° C. to 240 ° C. over 30 minutes. After reaching the specified viscosity, the mixture was discharged from the bottom of the reaction vessel under nitrogen pressure, cooled in a water bath, and cut with a pelletizer to obtain pellets.

[0154] ISS-PC2: Structural units derived from ISS / structural units derived from 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5,5)undecane (hereinafter referred to as SPG) = 80 / 20 (mol %), specific viscosity 0.344 (Manufacturing method) The same procedure as in Example 1 was carried out except that 405 parts of ISS, 211 parts of SPG, and 750 parts of DPC were used as raw materials.

[0155] ISS-PC3: Structural units derived from ISS / structural units derived from SPG / structural units derived from ND=75 / 15 / 10 (mol %), specific viscosity 0.361 (Manufacturing method) The same procedure as in Example 1 was carried out, except that 380 parts of ISS, 158 parts of SPG, 55 parts of ND, and 750 parts of DPC were used as raw materials.

[0156] ISS-PC4: Structural units derived from ISS / structural units derived from 1,4-cyclohexanedimethanol (hereinafter referred to as CHDM) = 70 / 30 (mol%), specific viscosity 0.301 (Manufacturing method) The same procedure as in Example 1 was carried out, except that 354 parts of ISS, 150 parts of CHDM, and 750 parts of DPC were used as raw materials.

[0157] ISS-PC5: Structural units derived from ISS / structural units derived from SPG / structural units derived from ND=65 / 35 / 5 (mol %), specific viscosity 0.312 (Manufacturing method) The same procedure as in Example 1 was carried out, except that 329 parts of ISS, 369 parts of SPG, 28 parts of ND, and 750 parts of DPC were used as raw materials.

[0158] ISS-PC6: Structural units derived from ISS / structural units derived from 1,4-cyclohexanedimethanol (hereinafter referred to as CHDM) = 50 / 50 (mol%), specific viscosity 0.376 (Manufacturing method) The same procedure as in Example 1 was carried out except that 253 parts of ISS, 250 parts of CHDM, and 750 parts of DPC were used as raw materials.

[0159] [Example 1] <Manufacturing of laminate> The polycarbonate resin (A) (PC / Elastomer 1) obtained by the above-described production was melted in a single-screw extruder with a screw diameter of 65 mm set at 260°C, the extrusion rate per hour was adjusted to a thickness of 240 μm, and the resulting mixture was fed into a multi-manifold T-die. Furthermore, the polycarbonate resin (B) (ISS-PC1) obtained by the production of polycarbonate resin (B) was melted in a single-screw extruder with a screw diameter of 40 mm set at 230°C, the extrusion rate per hour was adjusted to a thickness of 60 μm, and the resulting mixture was fed into a multi-manifold T-die. The laminate extruded from the T-die was cooled with a mirror-finished roll to obtain a laminate with a total thickness of 300 μm. The evaluation results of the resulting laminate are listed in Table 1.

[0160] [Example 2] A laminate having a total thickness of 300 μm was obtained in the same manner as in Example 1, except that (PC / Elastomer 2) was used as the polycarbonate resin (A). The various evaluation results of the obtained laminate are shown in Table 1.

[0161] [Example 3] A laminate having a total thickness of 300 μm was obtained in the same manner as in Example 1, except that (PC / Elastomer 3) was used as the polycarbonate resin (A). Various evaluation results of the obtained laminate are shown in Table 1.

[0162] [Example 4] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 1, except that the thickness of the polycarbonate resin (A) was adjusted to 260 μm and the thickness of the polycarbonate (B) was adjusted to 40 μm. The various evaluation results of the obtained laminate are shown in Table 1.

[0163] [Example 5] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 1, except that the thickness of the polycarbonate resin (A) was adjusted to 280 μm and the thickness of the polycarbonate (B) was adjusted to 20 μm. The various evaluation results of the obtained laminate are shown in Table 1.

[0164] [Example 6] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 1, except that (ISS-PC2) was used as the polycarbonate resin (B). The various evaluation results of the obtained laminate are shown in Table 1.

[0165] [Example 7] A laminate having a total thickness of 300 μm was obtained in the same manner as in Example 1, except that (ISS-PC3) was used as the polycarbonate resin (B). The various evaluation results of the obtained laminate are shown in Table 1.

[0166] [Example 8] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 7, except that the thickness of the polycarbonate resin (A) was adjusted to 260 μm and the thickness of the polycarbonate (B) was adjusted to 40 μm. The various evaluation results of the obtained laminate are shown in Table 1.

[0167] [Example 9] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 7, except that the thickness of the polycarbonate resin (A) was adjusted to 280 μm and the thickness of the polycarbonate (B) was adjusted to 20 μm. The various evaluation results of the obtained laminate are shown in Table 1.

[0168] [Example 10] A laminate having a total thickness of 300 μm was obtained in the same manner as in Example 1, except that (ISS-PC4) was used as the polycarbonate resin (B). The various evaluation results of the obtained laminate are shown in Table 1.

[0169] [Example 11] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 1, except that (ISS-PC5) was used as the polycarbonate resin (B). Various evaluation results of the obtained laminate are shown in Table 1.

[0170] [Comparative Example 1] A laminate having a total thickness of 300 μm was obtained using the same method as in Example 1, except that the polycarbonate resin (A) was Panlite L-1250 (a polycarbonate resin obtained using bisphenol A) manufactured by Teijin Limited, melted in a single-screw extruder with a screw diameter of 65 mm set at 280°C, the extrusion rate per hour was adjusted to a thickness of 240 μm, and supplied to a multi-manifold T-die. Various evaluation results of the obtained laminate are shown in Table 2.

[0171] Comparative Example 2 A laminate having a total thickness of 300 μm was obtained using the same method as in Comparative Example 1, except that (ISS-PC5) was used as the polycarbonate resin (B). Various evaluation results of the obtained laminate are shown in Table 2.

[0172] Comparative Example 3 A laminate having a total thickness of 300 μm was obtained using the same method as in Comparative Example 1, except that (ISS-PC4) was used as the polycarbonate resin (B). The various evaluation results of the obtained laminate are shown in Table 2.

[0173] Comparative Example 4 A laminate having a total thickness of 300 μm was obtained using the same method as in Comparative Example 1, except that (ISS-PC6) was used as the polycarbonate resin (B). Various evaluation results of the obtained laminate are shown in Table 2.

[0174] Comparative Example 5 A laminate having a total thickness of 300 μm was obtained using the same method as in Comparative Example 1, except that ACRYPET VH001 manufactured by Mitsubishi Chemical Corporation was used instead of the polycarbonate resin (B) and the temperature was set to 250° C. Various evaluation results of the obtained laminate are shown in Table 2.

[0175] [Table 1]

[0176] [Table 2] [Industrial Applicability]

[0177] The sheets or films and laminates of the present invention have excellent transparency, chemical resistance, formability, adhesion and scratch resistance, and are useful as transparent sheets for building materials, interior parts, display covers and the like, sheets for resin-coated metal plates, sheets for molding (vacuum / pressure molding, heat press molding, etc.), colored plates, transparent plates, shrink films, shrink labels, shrink tubes, automotive interior materials, resin glazing, home appliance components and office equipment components.

Claims

1. A laminate having a layer (A layer) formed from a polycarbonate resin composition containing a polycarbonate resin (A) and a thermoplastic elastomer, and a layer (B layer) formed from a polycarbonate resin (B) containing 30 mol % or more of a unit (b) represented by the following formula (B) and 5 to 70 mol % of a unit (c) represented by the following formula (C-1): 【Chemistry 1】 【Chemistry 2】 (In the formula, W represents an alkylene group having 1 to 20 carbon atoms or a cycloalkylene group having 6 to 20 carbon atoms, R represents a branched or linear alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 6 to 20 carbon atoms which may have a substituent, and m represents an integer of 0 to 10.)

2. 2. The laminate according to claim 1, wherein the polycarbonate resin (A) used in the layer A contains 50 mol % or more of carbonate units derived from aromatic dihydroxy units.

3. 3. The laminate according to claim 1 or 2, wherein the thermoplastic elastomer used in layer A is a thermoplastic elastomer composed of a hard segment consisting of a polybutylene terephthalate unit and a soft segment consisting of a polyester unit having an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid as the dicarboxylic acid component and a diol having 5 to 15 carbon atoms as the diol component.

4. 4. The laminate according to claim 1, wherein the content of the thermoplastic elastomer in the layer A is 3 to 50 parts by weight per 100 parts by weight of the polycarbonate resin (A).

5. 5. The laminate according to claim 1, wherein the polycarbonate resin (B) used in the layer B contains 30 to 95 mol % of the unit (b) represented by the formula (B).

6. The laminate according to any one of claims 1 to 5, wherein the thickness of the laminate is 0.05 to 10.0 mm.

7. The laminate according to any one of claims 1 to 6, wherein the laminate has a visible light transmittance of 85% or more.

8. The laminate according to any one of claims 1 to 7, wherein the laminate is produced by a melt extrusion method.

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