Resin composition and molded article thereof

Abstract

To provide a resin composition that has excellent transparency, surface hardness, impact resistance and flaw resistance and contains a polycarbonate resin, an acrylic resin, an impact resistance improver and an unsaturated fatty acid bisamide.SOLUTION: A resin composition contains a polycarbonate resin (A) containing a carbonate constitutional unit (a) derived from a diol having a spiro ring structure, by 5-85 mol% in the total carbonate constitutional unit 100 mol%, and an acrylic resin (B). Relative to the total 100 pts.wt. of the polycarbonate resin (A) and the acrylic resin (B), an impact resistance improver (C) with a refractive index of 1.485 or more and 1.495 or less is contained by 5-60 pts.wt. and an unsaturated fatty acid bisamide (D) is also contained by 0.1-10 pts.wt.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a resin composition containing a specific polycarbonate resin, an acrylic resin, a specific impact modifier, and an unsaturated fatty acid bisamide.

Background Art

[0002] Conventionally, as transparent resins, methacrylic resins, polycarbonate resins (hereinafter sometimes referred to as PC), etc. are known, and they are used in a wide range of fields such as electric and electronic parts, optical parts, automotive parts, and mechanical parts in the form of molded products, films, and sheets.

[0003] Methacrylic resins such as polymethyl methacrylate (hereinafter sometimes referred to as PMMA) have high transparency and a hard surface hardness (pencil hardness H to 3H), and are widely used as optical materials such as lenses and optical fibers. However, the glass transition temperature is as low as about 100°C, and due to its poor heat resistance, its use in fields requiring heat resistance is limited. Furthermore, there is a problem of low impact resistance.

[0004] Polycarbonate resins composed of bisphenol A are widely used in vehicle applications and building materials because of their excellent heat resistance, impact resistance, flame retardancy, and transparency. Among these applications, especially those used outdoors require high weather resistance. Generally, the weather resistance of polycarbonate resins is not excellent compared to other transparent materials such as acrylic resins, and yellowing and devitrification occur due to outdoor exposure. In addition, the surface is very soft (pencil hardness 4B to 2B) and is easily damaged.

[0005] It is known that a mixture of PC and PMMA is essentially incompatible and produces an opaque material. For example, Patent Document 1 shows that a mixture of PC and PMMA is opaque and the physical properties possessed by both polymers are not exhibited.

[0006] A resin composition of an acrylic resin using a polycarbonate resin having a special structure has been reported (Patent Document 2), and excellent transparency, weather resistance, and surface hardness have been achieved. However, according to the studies of the present inventors, the resin composition described in Patent Document 2 has problems with impact resistance.

[0007] In addition, polycarbonate resins and acrylic resins are required to improve scratch resistance in order to prevent scratches that occur during use. Patent Document 3 describes that scratch resistance is improved by containing a polycarbonate containing a structural unit derived from isosorbide and a silicone compound. However, when these silicone compounds are blended with polycarbonate resins or acrylic resins, there is a problem that the transparency is significantly reduced. Patent Document 4 describes that scratch resistance is improved and the transparency is good by containing a polycarbonate containing a structural unit derived from isosorbide and a fatty acid amide having an alkyl terminal with a functional group. However, according to the studies of the present inventors, the resin composition described in Patent Document 4 has problems with surface hardness.

[0008] Therefore, a composition having good transparency, surface hardness, impact resistance, and scratch resistance in a composition of a polycarbonate resin and an acrylic resin has not been reported so far.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0010] An object of the present invention is to provide a resin composition containing a polycarbonate resin, an acrylic resin, an impact modifier, and an unsaturated fatty acid bisamide, which have excellent properties such as transparency, surface hardness, impact resistance, and scratch resistance.

Means for Solving the Problems

[0011] As a result of intensive studies, the present inventors have found that by incorporating an acrylic resin, an impact modifier having a refractive index within a specific range, and an unsaturated fatty acid bisamide into a polycarbonate resin containing a specific spiro ring structure, a resin composition having excellent properties such as transparency, surface hardness, impact resistance, and scratch resistance can be obtained, and the present invention has been completed.

[0012] That is, according to the present invention, the problems of the invention are achieved as follows.

[0013] 1. A resin composition comprising 5 to 60 parts by weight of an impact modifier (C) having a refractive index of 1.485 or more and 1.495 or less and 0.1 to 10 parts by weight of an unsaturated fatty acid bisamide (D) with respect to a total of 100 parts by weight of a polycarbonate resin (A) containing 5 to 85 mol% of a carbonate structural unit (a) represented by the following formula (1) and an acrylic resin (B) in 100 mol% of all carbonate structural units.

[0014]

Chemical formula

[0015] (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.)

[0016] 2. The polycarbonate resin (A) consists of the carbonate structural unit (a) represented by the above formula (1) and another carbonate structural unit (b). The carbonate structural unit (b) is a carbonate structural unit (b) derived from at least one compound selected from the group consisting of an aliphatic diol compound, an alicyclic diol compound, and an aromatic dihydroxy compound. The resin composition according to item 1 above.

[0017] 3. The resin composition according to item 1 or 2 above, wherein the weight ratio of the polycarbonate resin (A) to the acrylic resin (B) is 30:70 to 99:1.

[0018] 4. The resin composition according to any one of items 1 to 3 above, wherein the acrylic resin (B) contains 40 to 100 mol% of a structural unit derived from methyl methacrylate.

[0019] 5. The resin composition according to any one of items 1 to 4 above, wherein the haze of the 2 mm thickness of a three-stage plate (having thicknesses of 1 mm, 2 mm, and 3 mm) molded at a cylinder temperature of 250 °C and a mold temperature of 80 °C is 20% or less, and there is no cloudiness at all thicknesses.

[0020] 6. The resin composition according to any one of items 1 to 5 above, wherein the notched Charpy impact strength measured according to ISO 179 is 10 kJ / m 2 or more.

[0021] 7. The resin composition according to any one of items 1 to 6 above, wherein the pencil hardness measured based on JIS K5400 is F or more.

[0022] 8. The resin composition according to any one of items 1 to 7 above, wherein no obvious scratches are visually confirmed on the molded product when tested by the following method. (Test method) A SUS ball with a diameter of 3 mmφ was pressed against the 2 mm thickness part of a three-stage plate with a load of 1 kg, and the plate was operated only once in one direction at a speed of 20 mm / s for a distance of 20 mm in an atmosphere of 23 °C and a relative humidity of 50%RH, and the appearance after the test was visually confirmed.

[0023] 9. The resin composition according to any one of the preceding items 1 to 8, wherein when tested by the following method, no obvious scratches are visually confirmed on the molded article. (Test method) Three pieces of gauze were stacked on a 10 mm × 10 mm flat plate, and the plate was pressed against the 2 mm thick part of a three-stage plate with a load of 1 kg. The plate was reciprocated 30 times at a speed of 20 mm / s over a distance of 20 mm in an atmosphere at 23°C and a relative humidity of 50%RH, and the appearance after the test was visually confirmed.

[0024] 10. A molded article obtained by injection molding the resin composition according to any one of the preceding items 1 to 9.

[0025] 11. A film or sheet formed from the resin composition according to any one of the preceding items 1 to 9.

Effect of the Invention

[0026] The present invention contains an impact modifier having a refractive index within a specific range and an unsaturated fatty acid bisamide in the resin components of a polycarbonate resin containing a specific spiro ring structure and an acrylic resin, thereby making it possible to provide a resin composition having excellent properties in terms of transparency, surface hardness, impact resistance, and scratch resistance. Therefore, the industrial effect achieved is remarkable.

Embodiments for Carrying out the Invention

[0027] Hereinafter, the present invention will be described in detail.

[0028] (Polycarbonate resin (A)) The polycarbonate resin used in the resin composition of the present invention is a polycarbonate resin containing 5 to 85 mol% of a carbonate structural unit (a) represented by the following formula (1) in 100 mol% of all carbonate structural units.

[0029]

Chemical formula

[0030] (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.)

[0031] The carbonate structural unit (a) represented by the above formula (1) is derived from a diol having a spiro ring structure. Examples of such diol compounds having a spiro ring structure include alicyclic diol compounds such as 3,9-bis(2-hydroxyethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis(2-hydroxy-1,1-diethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane, and 3,9-bis(2-hydroxy-1,1-dipropylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane.

[0032] Preferably, 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane is used.

[0033] The polycarbonate resin used in the resin composition of the present invention contains 5 to 85 mol%, preferably 10 to 80 mol%, more preferably 15 to 75 mol%, and still more preferably 20 to 70 mol% of the carbonate structural unit (a) represented by the above formula (1) in 100 mol% of all carbonate structural units. When the carbonate structural unit (a) is within the above range, the resin composition does not phase-separate and become cloudy during extrusion or molding in the resin composition with the acrylic resin, and the polymerization is easy without crystallization during the polymerization of the polycarbonate resin, which is preferable.

[0034] The polycarbonate resin used in the resin composition of the present invention contains the carbonate structural unit (a) represented by the above formula (1) and is used as a copolymer with other carbonate structural units (b).

[0035] The carbonate structural unit (b) is preferably a carbonate structural unit (b) derived from at least one compound selected from the group consisting of an aliphatic diol compound, an alicyclic diol compound, and an aromatic dihydroxy compound. Further, the carbonate structural unit (b) is preferably a carbonate structural unit (b) derived from at least one compound selected from the group consisting of an aliphatic diol compound and an alicyclic diol compound in terms of surface hardness and weather resistance.

[0036] Examples of the aliphatic diol compound include 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,12-dodecanediol, 2-methyl-1,3-propanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, 2-n-butyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 2,4-diethyl-1,5-pentanediol, 1,2-hexanediol, 1,2-octyl glycol, 2-ethyl-1,3-hexanediol, 2,3-diisobutyl-1,3-propanediol, 2,2-diisoamyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, etc. Among them, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, and 1,12-dodecanediol are preferably used.

[0037] Examples of the alicyclic diol compound include cyclohexanediols such as 1,2 - cyclohexanediol, 1,3 - cyclohexanediol, 1,4 - cyclohexanediol, 2 - methyl - 1,4 - cyclohexanediol; cyclohexanedimethanols such as 1,2 - cyclohexanedimethanol, 1,3 - cyclohexanedimethanol, 1,4 - cyclohexanedimethanol; norbornanedimethanols such as 2,3 - norbornanedimethanol, 2,5 - norbornanedimethanol; tricyclodecanedimethanol, pentacyclopentadecanedimethanol, 1,3 - adamantanediol, 2,2 - adamantanediol, decahydroxydimethanol, 2,2,4,4 - tetramethyl - 1,3 - cyclobutanediol, isosorbide, etc. Among them, cyclohexanedimethanols and isosorbide are preferably used.

[0038] Examples of the aromatic dihydroxy compound 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, etc. Among them, bisphenol A is preferably used.

[0039] The carbonate structural unit (b) is contained in an amount of 15 to 95 mol%, preferably 20 to 90 mol%, more preferably 25 to 85 mol%, and even more preferably 30 to 80 mol% based on 100 mol% of all carbonate structural units. When the carbonate structural unit (b) is within the above range, a resin composition excellent in the balance of transparency, surface hardness, impact resistance, and antistatic property can be obtained.

[0040] (Method for Producing Polycarbonate Resin (A)) The polycarbonate resin used in the resin composition of the present invention is produced by a reaction means known per se for producing ordinary polycarbonate resins, for example, a method of reacting a carbonate precursor such as a carbonic acid diester with a diol component. Next, the basic means of these production methods will be briefly described.

[0041] The transesterification reaction using a carbonic acid diester as the carbonate precursor is carried out by heating and stirring a predetermined proportion of the diol component with the carbonic acid diester in an inert gas atmosphere to distill off the generated alcohol or phenols. The reaction temperature varies depending on the boiling point of the generated alcohol or phenols, etc., but is usually in the range of 120 to 300 °C. The reaction is carried out under reduced pressure from the beginning to complete the reaction while distilling off the generated alcohol or phenols. Further, a terminal stopper, an antioxidant, etc. may be added as necessary.

[0042] Examples of the carbonic acid diester used in the transesterification reaction include esters of an optionally substituted aryl group having 6 to 12 carbon atoms, an aralkyl group, etc. Specifically, diphenyl carbonate, ditolyl carbonate, bis(chlorophenyl) carbonate and m-cresyl carbonate, etc. are exemplified. Among them, 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 1 mol of the total dihydroxy compounds.

[0043] In the melt polymerization method, a polymerization catalyst can be used to increase the polymerization rate, and examples of such a polymerization catalyst include alkali metal compounds, alkaline earth metal compounds, nitrogen-containing compounds, metal compounds, etc.

[0044] Examples of such compounds include organic acid salts, inorganic salts, oxides, hydroxides, hydrides, alkoxides, quaternary ammonium hydroxides, etc. of alkali metals and alkaline earth metals. These compounds can be used alone or in combination.

[0045] Examples of alkali metal compounds include sodium hydroxide, potassium hydroxide, cesium hydroxide, lithium hydroxide, sodium bicarbonate, sodium carbonate, potassium carbonate, cesium carbonate, lithium carbonate, sodium acetate, potassium acetate, cesium acetate, lithium acetate, sodium stearate, potassium stearate, cesium stearate, lithium stearate, sodium borohydride, sodium benzoate, potassium benzoate, cesium benzoate, lithium benzoate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, dilithium hydrogen phosphate, disodium phenyl phosphate, the disodium salt, dipotassium salt, dicesium salt, dilithium salt of bisphenol A, the sodium salt, potassium salt, cesium salt, lithium salt of phenol, etc.

[0046] Examples of alkaline earth metal compounds include magnesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, magnesium carbonate, calcium carbonate, strontium carbonate, barium carbonate, magnesium diacetate, calcium diacetate, strontium diacetate, barium diacetate, barium stearate, etc.

[0047] Examples of nitrogen-containing compounds include quaternary ammonium hydroxides having alkyl, aryl groups, etc., such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, trimethylbenzylammonium hydroxide, etc. Tertiary amines such as triethylamine, dimethylbenzylamine, triphenylamine, etc., and imidazoles such as 2-methylimidazole, 2-phenylimidazole, benzimidazole, etc. are also included. Bases or basic salts such as ammonia, tetramethylammonium borohydride, tetrabutylammonium borohydride, tetrabutylammonium tetraphenylborate, tetraphenylammonium tetraphenylborate, etc. are exemplified.

[0048] Examples of metal compounds include zinc aluminum compounds, germanium compounds, organotin compounds, antimony compounds, manganese compounds, titanium compounds, zirconium compounds, etc. These compounds may be used alone or in combination of two or more.

[0049] The usage amount of these polymerization catalysts is preferably selected in the range of 1×10 -9 ~1×10 -2 equivalent, preferably 1×10 -8 ~1×10 -5 equivalent, more preferably 1×10 -7 ~1×10 -3 equivalent.

[0050] Also, a catalyst deactivator can be added in the latter stage of the reaction. As the catalyst deactivator to be used, known catalyst deactivators are effectively used, among which ammonium salts and phosphonium salts of sulfonic acid are preferable. Further, salts of dodecylbenzenesulfonic acid such as tetrabutylphosphonium dodecylbenzenesulfonate, and salts of p-toluenesulfonic acid such as tetrabutylammonium p-toluenesulfonate are preferable.

[0051] As sulfonic acid esters, methyl benzenesulfonate, ethyl benzenesulfonate, butyl benzenesulfonate, octyl benzenesulfonate, phenyl benzenesulfonate, methyl p-toluenesulfonate, ethyl p-toluenesulfonate, butyl p-toluenesulfonate, octyl p-toluenesulfonate, phenyl p-toluenesulfonate and the like are preferably used. Among them, tetrabutylphosphonium dodecylbenzenesulfonate is most preferably used.

[0052] When at least one polymerization catalyst selected from the alkali metal compound and / or alkaline earth metal compound is used, the amount of these catalyst deactivators used is preferably in a ratio of 0.5 to 50 moles, more preferably 0.5 to 10 moles, and still more preferably 0.8 to 5 moles per mole of the catalyst.

[0053] (Specific viscosity of polycarbonate resin (A): η SP ) The specific viscosity (η SP ) of the polycarbonate resin used in the resin composition of the present invention is preferably 0.2 to 1.5. When the specific viscosity is in the range of 0.2 to 1.5, the strength and moldability of the molded product are good. More preferably, it is 0.25 to 1.2, still more preferably 0.3 to 1.0, and particularly preferably 0.3 to 0.5.

[0054] The specific viscosity referred to in the present invention is determined using an Ostwald viscometer from a solution prepared by dissolving 0.7 g of polycarbonate resin in 100 ml of methylene chloride at 20°C. Specific viscosity (η SP ) = (t - t0) / t0 [t0 is the dropping time in seconds of methylene chloride, t is the dropping time in seconds of the sample solution] Specifically, the relative viscosity can be measured, for example, as follows. First, the polycarbonate resin is dissolved in methylene chloride at 20 to 30 times its weight. After collecting the soluble components by filtering through Celite, the solution is removed and dried thoroughly to obtain the solid of the methylene chloride-soluble components. The relative viscosity at 20°C is determined using an Ostwald viscometer from a solution prepared by dissolving 0.7 g of such solid in 100 ml of methylene chloride.

[0055] (Acrylic resin (B)) As the acrylic resin used in the resin composition of the present invention, an acrylic resin as a thermoplastic resin is used. The following compounds are exemplified as the monomers used in the acrylic resin. For example, methyl methacrylate, methacrylic acid, methyl acrylate, acrylic acid, benzyl (meth)acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, t-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, glycidyl (meth)acrylate, hydroxypropyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, norbornyl (meth)acrylate, dicyclopentenyl (meth)acrylate, dicyclopentanyl (meth)acrylate, dicyclopentenyl oxyethyl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, acrylic (meth)acrylate, 2-hydroxyethyl (meth)acrylate, succinic acid 2-(meth)acryloyloxyethyl, maleic acid 2-(meth)acryloyloxyethyl, phthalic acid 2-(meth)acryloyloxyethyl, hexahydrophthalic acid 2-(meth)acryloyloxyethyl, pentamethylpiperidyl (meth)acrylate, tetramethylpiperidyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate, cyclopentyl methacrylate, cyclopentyl acrylate, cyclohexyl methacrylate, cyclohexyl acrylate, cycloheptyl methacrylate, cycloheptyl acrylate, cyclooctyl methacrylate, cyclooctyl acrylate, cyclododecyl methacrylate, cyclododecyl acrylate, etc. are exemplified.

[0056] These may be used alone by polymerization or may be used by polymerizing two or more types thereof. Among them, it is preferable to contain methyl methacrylate and / or methyl acrylate. In particular, as the monomer component, it is preferable to contain 40 to 100 mol% of methyl methacrylate, more preferably 50 to 100 mol%, and still more preferably 60 to 99 mol%. When the proportion of methyl methacrylate as the monomer component is within the above range, it has excellent thermal decomposition resistance, it is difficult for molding defects such as silver to occur during molding, and the heat distortion temperature is good. Also, other monomers that can be polymerized with these acrylic monomers, such as polyolefin monomers, vinyl monomers, etc., may be used in combination.

[0057] The molecular weight of the acrylic resin is not particularly limited, but if it is in the range of 30,000 or more and 300,000 or less in terms of weight average molecular weight, when molding as a composition, appearance defects such as flow unevenness do not occur, and a composition excellent in mechanical properties and heat resistance can be provided.

[0058] The acrylic resin used in the resin composition of the present invention preferably has a specific viscosity in the range of 0.12 to 0.55. If the specific viscosity is less than 0.12, the molded product may become brittle. If the specific viscosity is higher than 0.55, the melt viscosity of the resin may increase and the moldability may be inferior.

[0059] (Impact modifier (C)) The resin composition of the present invention contains an impact modifier (C). The impact modifier (C) is preferably a core-shell type polymer composed of a core that is a rubbery polymer and a shell obtained by graft polymerization onto the rubbery polymer. By using a core-shell type polymer, the dispersibility in polycarbonate is good, and a high impact strength tends to be obtained.

[0060] The average particle diameter of the impact modifier (C) is preferably 10 to 500 nm. More preferably, it is 30 to 300 nm, still more preferably 50 to 200 nm, and most preferably 50 to 180 nm. When the average particle diameter is less than 10 nm, sufficient impact strength tends not to be obtained. On the other hand, when the average particle diameter exceeds 500 nm, the transparency of the resulting resin composition tends to decrease. The average particle diameter is measured in the latex state of the rubber-like polymer and the graft copolymer. As the measuring device, the volume average particle diameter was measured using MICROTRAC UPA150 manufactured by Nikkiso Co., Ltd.

[0061] The rubber-like polymer corresponding to the core of the impact modifier (C) is a rubber-like polymer of a vinyl monomer or a polymer of a diene monomer and a vinyl monomer, and it is preferable that the vinyl monomer is at least one selected from (meth)acrylic acid monomers and (meth)acrylic acid alkyl ester monomers in terms of achieving both the transparency and impact strength of the resin composition of the present invention and further from the viewpoint of raw material cost.

[0062] The (meth)acrylic acid monomer means an acrylic acid monomer, a methacrylic acid monomer, or a mixture thereof. The (meth)acrylic acid alkyl ester monomer means an acrylic acid alkyl ester monomer, a methacrylic acid alkyl ester monomer, or a mixture thereof.

[0063] Specific examples of the diene monomer include 1,3-butadiene. Specific examples of the (meth)acrylic acid monomer and the (meth)acrylic acid alkyl ester monomer include acrylic acid, methacrylic acid, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-hydroxyethyl methacrylate, and glycidyl methacrylate. Examples of the polymer obtained from such monomers include butadiene-acrylic acid ester copolymers.

[0064] The glass transition temperature (Tg) of the rubber-like polymer is preferably 0 °C or lower from the viewpoint of impact resistance improvement. More preferably, it is -20 °C or lower, and still more preferably, it is -40 °C or lower.

[0065] The shell part of the impact modifier (C) is at least one vinyl monomer. The shell part can be formed by graft polymerization with at least one vinyl monomer.

[0066] Examples of the vinyl monomer include aromatic vinyl compounds, vinyl cyanide compounds, unsaturated carboxylic acids, and unsaturated carboxylic acid esters. Among the aromatic vinyl compounds, styrene, α-methylstyrene, etc. are preferable. Among the vinyl cyanide compounds, acrylonitrile, methacrylonitrile, etc. are preferable. Among the unsaturated carboxylic acids and unsaturated carboxylic acid esters, acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters having an alkyl ester with 1 to 12 carbon atoms, etc. are preferable. Since it has excellent dispersibility in the polycarbonate resin and the transparency of the resulting resin composition is excellent, the vinyl monomer used for graft polymerization is preferably an unsaturated carboxylic acid ester or a mixture of an unsaturated carboxylic acid ester and an aromatic vinyl compound.

[0067] Furthermore, in the impact modifier (C), one or more reactive groups selected from an epoxy group, a hydroxy group, a carboxy group, an alkoxy group, an isocyanate group, an acid anhydride group, and an acid chloride group can be introduced into the graft part. Thereby, compared with the case of using a rubber graft copolymer not containing a reactive group, the dispersibility and impact resistance may be improved.

[0068] The refractive index of the impact modifier (C) used in the present invention is 1.485 or more and 1.495 or less, preferably 1.487 or more and 1.494 or less, and more preferably 1.490 or more and 1.493 or less. When the refractive index of the impact modifier (C) is within the above range, the resin composition is excellent in transparency and impact resistance.

[0069] As a method for producing the impact modifier (C), any of bulk polymerization, solution polymerization, suspension polymerization, and emulsion polymerization may be employed, but emulsion polymerization, that is, emulsion graft polymerization, is preferred. Specifically, latex is added to a reaction vessel equipped with a stirrer, and further a vinyl monomer, a polymerization initiator, and water are added. If necessary, a chain transfer agent and a redox agent are charged, and then heating and stirring may be carried out.

[0070] There are no particular restrictions on the types of the polymerization initiator, chain transfer agent, and redox agent used herein, and known ones can be used. Also, there are no particular restrictions on the method of adding each raw material to the reaction vessel. In addition to batch addition before polymerization, divided addition may also be possible. Also, the graft polymerization is carried out in one stage or two or more stages, and the monomer composition of each stage may be the same or different. Also, the monomers may be added all at once, continuously, or in combination thereof.

[0071] When the emulsion polymerization method is adopted, known polymerization initiators, that is, thermal decomposition type polymerization initiators such as 2,2'-azobisisobutyronitrile, hydrogen peroxide, potassium persulfate, ammonium persulfate, etc. can be used. Also, organic peroxides such as t-butylperoxyisopropyl carbonate, paramethane hydroperoxide, cumene hydroperoxide, dicumyl peroxide, t-butyl hydroperoxide, di-t-butyl peroxide, t-hexyl peroxide, etc., or inorganic peroxides such as hydrogen peroxide, potassium persulfate, ammonium persulfate, etc., and if necessary, reducing agents such as sodium formaldehyde sulfoxylate, glucose, etc., and if necessary, transition metal salts such as iron(II) sulfate, and if necessary, chelating agents such as disodium ethylenediaminetetraacetate, and if necessary, phosphorus-based flame retardants such as sodium pyrophosphate, etc. can also be used as a redox type polymerization initiator used in combination.

[0072] When using a redox type polymerization initiator system, since polymerization can be carried out even at a low temperature where the peroxide does not substantially thermally decompose, it becomes preferable that the polymerization temperature can be set within a wide range. Among them, it is preferable to use an aromatic ring-containing peroxide such as cumene hydroperoxide and dicumyl peroxide as the redox type polymerization initiator. The usage amount of the polymerization initiator and the usage amounts of the reducing agent, transition metal salt, chelating agent, etc. when using a redox type polymerization initiator can be used within a known range.

[0073] When synthesizing the impact modifier (C) by emulsion polymerization, as the polymerization emulsifier, an alkali metal salt of a higher fatty acid such as disproportionated rosin acid, oleic acid, stearic acid, etc., or an alkali metal salt of a phosphoric acid compound, or further an alkali metal salt of a sulfonic acid or sulfuric acid compound, etc., can be used as a conventionally known polymerization emulsifier.

[0074] When obtaining the impact modifier (C) by emulsion polymerization, for example, after coagulating by mixing the latex of the impact modifier (C) with an acid such as hydrochloric acid or a metal salt of divalent or higher such as calcium chloride, magnesium chloride, magnesium sulfate, aluminum chloride, calcium acetate, etc., and then performing heat treatment, dehydration, washing, and drying according to a known method, the impact modifier can be separated from the aqueous medium (also referred to as the coagulation method). Or, an alcohol such as methanol, ethanol, propanol, etc., or a water-soluble organic solvent such as acetone is added to the latex to precipitate the impact modifier, and after separating from the solvent by centrifugation or filtration, etc., it can be dried and isolated. As another method, an organic solvent having some water solubility such as methyl ethyl ketone is added to the latex containing the impact modifier used in the present invention to extract the impact modifier component in the latex into the organic solvent layer, and after separating the organic solvent layer, it is mixed with water, etc. to precipitate the impact modifier component, etc. can be mentioned. Also, the latex can be directly powdered by the spray drying method.

[0075] In the present invention, the resin composition may be one in which a polycarbonate resin contains an impact modifier that has been previously contained in an acrylic resin. Specific examples of the acrylic resin containing an impact modifier are not particularly limited, and examples thereof include the following.

[0076] For example, those manufactured by Mitsubishi Chemical Corporation, trade names Acrypet IRK304, IRL309, VRL40; those manufactured by Kuraray Co., Ltd., trade names Parapegt GR00100, GR04970, GR-H60; those manufactured by Daicel-Evonik Corporation, trade names PLEXIGLAS AG100, zk6HF; those manufactured by Asahi Kasei Corporation, trade names Dellpet SR8350, SR8500, etc.

[0077] (Unsaturated fatty acid bisamide (D)) The resin composition of the present invention contains unsaturated fatty acid bisamide (D).

[0078] The number of carbon atoms in the fatty acid moiety of the unsaturated fatty acid bisamide (D) is not particularly limited, but the number of carbon atoms in this moiety is preferably 12 to 24. When the number of carbon atoms in the fatty acid moiety is 12 or more, good scratch resistance can be obtained. From the viewpoint of availability, unsaturated fatty acid bisamides having 24 or less carbon atoms in the fatty acid moiety are preferred.

[0079] Between the amide groups in the unsaturated fatty acid bisamide (D), it is preferably linked by a hydrocarbon chain having 2 to 10 carbon atoms. By making the number of carbon atoms between the amide groups 2 or more, the scratch resistance of the molded product can be further improved.

[0080] Specific examples of the unsaturated fatty acid bisamide (D) include ethylene bisoleic acid amide (for example, manufactured by NOF Corporation: Alflo AD-281F), ethylene biserucic acid amide (for example, manufactured by NOF Corporation: Alflo AD-221), hexamethylene bisoleic acid amide (for example, manufactured by Mitsubishi Chemical Corporation: Slipax ZHO), etc. Among these, ethylene bisoleic acid amide is preferred.

[0081] (Method for Producing a Resin Composition Containing a Polycarbonate Resin, an Acrylic Resin, an Impact Modifier, and an Unsaturated Fatty Acid Bisamide) It is preferable to blend the polycarbonate resin, acrylic resin, impact modifier, and unsaturated fatty acid bisamide of the resin composition of the present invention in a molten state. As a method of blending in a molten state, an extruder is generally used, and kneading and pelletizing are performed at a molten resin temperature of 200 to 320°C, preferably 220 to 300°C, more preferably 230 to 290°C. Thereby, pellets of a resin composition in which both resins are uniformly blended are obtained. The configuration of the extruder, the configuration of the screw, etc. are not particularly limited. If the molten resin temperature in the extruder exceeds 320°C, the resin may be colored or thermally decomposed. On the other hand, if the resin temperature is below 200°C, the resin viscosity may be too high and the extruder may be overloaded.

[0082] (by weight) The weight ratio of the polycarbonate resin (A) to the acrylic resin (B) used in the present invention is preferably mixed in the range of 30:70 to 99:1. More preferably, it is in the range of 35:65 to 95:5, still more preferably in the range of 40:60 to 93:7, particularly preferably in the range of 50:50 to 92:8, and most preferably in the range of 55:45 to 90:10. By setting the above range, a resin composition excellent in surface hardness and impact resistance can be obtained.

[0083] The impact modifier (C) used in the present invention is blended in the range of 5 to 60 parts by weight with respect to a total of 100 parts by weight of the polycarbonate resin and the acrylic resin. Preferably, it is in the range of 7 to 55 parts by weight, more preferably in the range of 8 to 50 parts by weight, still more preferably in the range of 9 to 48 parts by weight, and particularly preferably in the range of 10 to 45 parts by weight. By setting the above range, a resin composition excellent in transparency, surface hardness, and impact resistance can be obtained.

[0084] The unsaturated fatty acid bisamide (D) used in the present invention is blended in the range of 0.1 to 10 parts by weight, preferably 0.5 to 8 parts by weight, more preferably 1 to 7 parts by weight, still more preferably 1.5 to 6 parts by weight, and particularly preferably 2 to 5 parts by weight, based on 100 parts by weight in total of the polycarbonate resin and the acrylic resin. By setting it within the above range, a resin composition excellent in transparency, surface hardness, impact resistance, and scratch resistance can be obtained.

[0085] (Additive) The resin composition used in the present invention can be blended with additives such as heat stabilizers, plasticizers, light stabilizers, polymerization metal deactivators, flame retardants, lubricants, surfactants, antibacterial agents, ultraviolet absorbers, mold release agents, and colorants, depending on the application and requirements.

[0086] (Heat stabilizer) The resin composition used in the present invention preferably contains a heat stabilizer in particular in order to suppress a decrease in molecular weight and deterioration of hue during extrusion and molding. Examples of the heat stabilizer include phosphorus-based heat stabilizers, phenol-based heat stabilizers, and sulfur-based heat stabilizers, and one of these can be used alone or two or more thereof can be used in combination. As the phosphorus-based stabilizer, it is preferable to blend a phosphite compound. Examples of the phosphite compound include pentaerythritol-type phosphite compounds, phosphite compounds having a cyclic structure by reacting with divalent phenols, and phosphite compounds having other structures.

[0087] Specific examples of the above pentaerythritol-type phosphite compound include, for example, di Stearyl 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, phenyl bisphenol A pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, dicyclohexyl pentaerythritol diphosphite, etc. may be mentioned, and among them, distearyl pentaerythritol diphosphite and bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite are preferably mentioned.

[0088] Examples of the phosphite compound having a cyclic structure and reacting with the above-mentioned diphenols 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, 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, etc.

[0089] Examples of the phosphite compound having the above other structure 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-iso-propylphenyl) phosphite, tris(di-n-butylphenyl) phosphite, tris(2,4-di-tert-butylphenyl) phosphite, and tris(2,6-di-tert-butylphenyl) phosphite.

[0090] In addition to various phosphite compounds, examples include phosphate compounds, phosphonite compounds, and phosphonate compounds.

[0091] 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, diisopropyl phosphate, etc., and triphenyl phosphate and trimethyl phosphate are preferred.

[0092] Examples of phosphonite compounds include tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylenediphosphonite, tetrakis(2,4-di-tert-butylphenyl)-4,3'-biphenylenediphosphonite, tetrakis(2,4-di-tert-butylphenyl)-3,3'-biphenylenediphosphonite, tetrakis(2,6-di-tert-butylphenyl)-4,4'-biphenylenediphosphonite, tetrakis(2,6-di-tert-butylphenyl)-4,3'-biphenylenediphosphonite, tetrakis(2,6-di-tert-butylphenyl)-3,3'-biphenylenediphosph onite, bis(2,4-di-tert-butylphenyl)-4-phenyl-phenylphosphonite, bis(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, bis(2,6-di-tert-butylphenyl)-3-phenyl-phenylphosphonite, etc. Among them, tetrakis(di-tert-butylphenyl)-biphenylenediphosphonite and bis(di-tert-butylphenyl)-phenyl-phenylphosphonite are preferred, and tetrakis(2,4-di-tert-butylphenyl)-biphenylenediphosphonite and bis(2,4-di-tert-butylphenyl)-phenyl-phenylphosphonite are more preferred. Such phosphonite compounds can be preferably used in combination with phosphite compounds having an aryl group substituted with two or more of the above alkyl groups.

[0093] Examples of phosphonate compounds include dimethyl benzenephosphonate, diethyl benzenephosphonate, and dipropyl benzenephosphonate.

[0094] Among the above phosphorus-based heat stabilizers, tris(nonylphenyl) 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.

[0095] The above phosphorus-based heat stabilizers can be used alone or in combination of two or more. The phosphorus-based heat stabilizer is preferably compounded in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.5 part by weight, and still more preferably 0.01 to 0.3 part by weight per 100 parts by weight of the resin composition.

[0096] For the purpose of suppressing the decrease in molecular weight and the deterioration of hue during extrusion and molding, the resin composition used in the present invention can also be added with a hindered phenol-based heat stabilizer or a sulfur-based heat stabilizer in combination with the phosphorus-based heat stabilizer as a heat stabilizer.

[0097] As the hindered phenol-based heat stabilizer, for example, those having an antioxidant function are not particularly limited as long as they have such a function. Examples 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, triethylene glycol-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{(octylthio)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.

[0098] Among these, n-octadecyl 3-(4'-hydroxy-3',5'-di-t-but tylphenyl) 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-thiodiethylene bis {3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate}, and the like are preferable.

[0099] These hindered phenolic heat stabilizers may be used alone or in combination of two or more.

[0100] The hindered phenolic heat stabilizer is preferably compounded in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.5 part by weight, and still more preferably 0.01 to 0.3 part by weight per 100 parts by weight of the resin composition.

[0101] Examples of the sulfur-based heat stabilizers include dilauryl 3,3'-thiodipropionate, ditridecyl 3,3'-thiodipropionate, dimyristyl 3,3'-thiodipropionate, distearyl 3,3'-thiodipropionate, lauryl stearyl 3,3'-thiodipropionate, pentaerythritol tetrakis(3-laurylthiopropionate), bis[2-methyl-4-(3-laurylthiopropionyloxy)-5-tert-butylphenyl] sulfide, octadecyl disulfide, mercaptobenzimidazole, 2-mercapto-6-methylbenzimidazole, 1,1'-thiobis(2-naphthol), and the like. Among the above, pentaerythritol tetrakis(3-laurylthiopropionate) is preferred.

[0102] These sulfur-based heat stabilizers may be used alone or in combination of two or more.

[0103] The sulfur-based heat stabilizer is preferably compounded in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.5 part by weight, and still more preferably 0.01 to 0.3 part by weight per 100 parts by weight of the resin composition.

[0104] When a phosphite-based heat stabilizer, a phenolic heat stabilizer, and a sulfur-based heat stabilizer are used in combination, the total amount thereof is preferably compounded in an amount of 0.001 to 1 part by weight, more preferably 0.01 to 0.3 part by weight, per 100 parts by weight of the resin composition.

[0105] (Release agent) In order to further improve the mold release property from the mold during melt molding, it is also possible to blend a mold release agent within a range that does not impair the object of the present invention, in the resin composition used in the present invention.

[0106] Examples of such mold release agents include higher fatty acid esters of monohydric or polyhydric alcohols, higher fatty acids, paraffin waxes, beeswax, olefin waxes, olefin waxes containing carboxy groups and / or carboxylic anhydride groups, silicone oils, organopolysiloxanes, and the like.

[0107] As the higher fatty acid ester, partial esters or total esters of monohydric or polyhydric alcohols having 1 to 20 carbon atoms and saturated fatty acids having 10 to 30 carbon atoms are preferable. Examples of such partial esters or total esters of monohydric or polyhydric alcohols and saturated fatty acids include, for example, monoglyceride stearate, diglyceride stearate, triglyceride stearate, monosorbitan stearate, stearyl stearate, monoglyceride behenate, behenyl behenate, pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythritol tetraperargonate, propylene glycol monostearate, stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, isopropyl palmitate, biphenyl biphenate, sorbitan monostearate, 2-ethylhexyl stearate, and the like.

[0108] Among them, monoglyceride stearate, triglyceride stearate, pentaerythritol tetrastearate, and behenyl behenate are preferably used.

[0109] As the higher fatty acid, saturated fatty acids having 10 to 30 carbon atoms are preferable. Examples of such fatty acids include myristic acid, lauric acid, palmitic acid, stearic acid, behenic acid, and the like.

[0110] These release agents may be used alone or in combination of two or more. The compounding amount of such a release agent is preferably 0.01 to 5 parts by weight with respect to 100 parts by weight of the resin composition.

[0111] (Ultraviolet absorber) The resin composition used in the present invention may contain an ultraviolet absorber. Examples of the ultraviolet absorber include benzotriazole-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, triazine-based ultraviolet absorbers, cyclic iminoester-based ultraviolet absorbers, cyanoacrylate-based ultraviolet absorbers, etc. Among them, benzotriazole-based ultraviolet absorbers are preferred.

[0112] 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-3'-(3",4",5",6"-tetraphthalimidomethyl)-5'-methylphenyl]benzotriazole, 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 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], methyl-3-[3-tert-butyl-5-(2H-benzotriazol-2-yl)-4-hydroxyphenylpropionate-condensate with polyethylene glycol, and other benzotriazole-based ultraviolet absorbers.

[0113] The proportion of such an ultraviolet absorber is preferably 0.01 to 2 parts by weight, more preferably 0.1 to 1 part by weight, and still more preferably 0.2 to 0.5 part by weight with respect to 100 parts by weight of the resin composition.

[0114] (Light stabilizer) The resin composition used in the present invention may contain a light stabilizer. When a light stabilizer is contained, it has advantages in terms of weather resistance and makes it difficult for cracks to occur in the molded product.

[0115] Examples of the light stabilizer include 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate, bis(2,2,6,6-tetramethyl-1-octyloxy-4-piperidinyl) didecanoate, 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) phenyl phosphite and other hindered amines, nickel bis(octylphenyl sulfide), nickel complex-3,5-di-t-butyl-4-hydroxybenzyl phosphate monoethylate, nickel dibutyldithiocarbamate and other nickel complexes. 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 part by weight, based on 100 parts by weight of the resin composition.

[0116] (Epoxy stabilizer) In order to improve the hydrolysis resistance, the resin composition used in the present invention may be blended with an epoxy compound within a range not impairing the object of the present invention.

[0117] As epoxy stabilizers, there are epoxidized soybean oil, epoxidized linseed oil, phenyl glycidyl ether, allyl glycidyl ether, t-butylphenyl glycidyl ether, 3,4-epoxycyclohexylmethyl-3’,4’-epoxycyclohexyl carboxylate, 3,4-epoxy-6-methylcyclohexylmethyl-3’,4’-epoxy-6’-methylcyclohexyl carboxylate, 2,3-epoxycyclohexylmethyl-3’,4’-epoxycyclohexyl carboxylate, 4-(3,4-epoxy-5-methylcyclohexyl)butyl-3’,4’-epoxycyclohexyl carboxylate, 3,4-epoxycyclohexyl ethylene oxide, cyclohexylmethyl-3,4-epoxycyclohexyl carboxylate, 3,4-epoxy-6-methylcyclohexylmethyl-6’-methylsilocyclohexyl carboxylate, bisphenol A diglycidyl ether, tetrabromobisphenol A glycidyl ether, diglycidyl ester of phthalic acid, diglycidyl ester of hexahydrophthalic acid, bis-epoxy dicyclopentadienyl ether, bis-epoxy ethylene glycol, bis-epoxy cyclohexyl adipate, butadiene diepoxide, tetraphenylethylene epoxide, octyl epoxytallate, 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-epoxycyclohexyl carboxylate, N-butyl-2,2-dimethyl-3,4-epoxycyclohexyl carboxylate, 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-epoxy tetrahydrophthalic anhydride, 3-t-butyl-4,5-epoxy tetrahydrophthalic anhydride, diethyl-4,Examples include 5-epoxy-cis-1,2-cyclohexyl dicarboxylate, di-n-butyl-3-t-butyl-4,5-epoxy-cis-1,2-cyclohexyl dicarboxylate, etc. Bisphenol A diglycidyl ether is preferred in terms of compatibility, etc.

[0118] Such epoxy stabilizers are desirably blended in the range of 0.0001 to 5 parts by weight, preferably 0.001 to 1 part by weight, and more preferably 0.005 to 0.5 part by weight, based on 100 parts by weight of the resin composition.

[0119] (Blueing agent) The resin composition used in the present invention can be blended with a blueing agent in order to cancel out the yellowness of the lens based on the polymer and the ultraviolet absorber. Any blueing agent that can be used for polycarbonate can be used without particular problem. Generally, anthraquinone dyes are easily available and preferred.

[0120] Specific examples of the blueing agent include, for example, the common name Solvent Violet13 [CA.No (Color Index No) 60725], the common name Solvent Violet31 [CA.No 68210, the common name Solvent Violet33 [CA.No 60725], the common name Solvent Blue94 [CA.No 61500], the common name Solvent Violet36 [CA.No 68210], the common name Solvent Blue97 [Macrolex Violet RR manufactured by Bayer], and the common name Solvent Blue45 [CA.No61110] as representative examples.

[0121] These blueing agents may be used alone or in combination of two or more. These blueing agents are preferably blended in a proportion of 0.1×10 -4 ~2×10 -4 parts by weight based on 100 parts by weight of the resin composition.

[0122] (Flame retardant) A flame retardant can also be blended into the resin composition used in the present invention. 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 alkali (earth) metal salts of organic sulfonic acids, metal salt-based borate flame retardants, and metal salt-based stannate flame retardants; and silicone-based flame retardants, ammonium polyphosphate-based flame retardants, triazine-based flame retardants, and the like. Separately, a flame retardant aid (for example, sodium antimonate, antimony trioxide, etc.) or a dripping inhibitor (polytetrafluoroethylene having fibril-forming ability, etc.) may be blended and used in combination with the flame retardant.

[0123] Among the above-mentioned flame retardants, compounds that do not contain chlorine atoms and bromine atoms are more suitable as the flame retardant in the molded article of the present invention, which features reduced environmental impact, because the factors considered unfavorable when performing incineration disposal or thermal recycling are reduced.

[0124] When blending a flame retardant, a range of 0.05 to 50 parts by weight per 100 parts by weight of the resin composition is preferable. When it is 0.05 parts by weight or more, sufficient flame retardancy is likely to be exhibited, and when it is 50 parts by weight or less, the molded article is excellent in strength, heat resistance, and the like.

[0125] (Molded article) The resin composition of the present invention can be formed and processed into molded articles (including sheets and films) by any method such as injection molding, compression molding, injection compression molding, melt film forming, casting, etc., and can be used as molded articles such as optical lenses, optical discs, optical films, printed circuit boards, optical cards, liquid crystal panels, headlamp lenses, light guide plates, diffusion plates, protective films, OPC binders, front panels, housings, trays, water tanks, lighting covers, signboards, resin windows, etc. In particular, it can be used as a member that requires high surface hardness, such as front panels, housings, trays, water tanks, lighting covers, signboards, resin windows, etc.

[0126] (Transparency) For the resin composition of the present invention, the haze of its 2 mm thick molded piece is preferably 20% or less, more preferably 15% or less, still more preferably 10% or less, particularly preferably 5% or less, and most preferably 3% or less. Also, it is preferable that there is no cloudiness at all thicknesses of the three-stage plate having thicknesses of 1 mm, 2 mm, and 3 mm. It is preferable that the haze is within the above range and there is no cloudiness regardless of the molded article thickness, as the range of use as an optical member is not limited.

[0127] (Impact strength) The resin composition of the present invention preferably has a notched Charpy impact strength measured according to ISO179 of 10 kJ / m 2 or more, more preferably 11 kJ / m 2 or more, still more preferably 12 kJ / m 2 or more, particularly preferably 13 kJ / m 2 or more.

[0128] (Pencil hardness) The resin composition of the present invention preferably has a pencil hardness of F or higher. More preferably, it is H or higher in terms of better scratch resistance. Note that a pencil hardness of 4H or lower has sufficient functions. The pencil hardness can be increased by increasing the weight ratio of the acrylic resin. In the present invention, the pencil hardness refers to the hardness at which no scratch remains even when the resin composition of the present invention is rubbed with a pencil having a specific pencil hardness, and it is preferable to use the pencil hardness used in the surface hardness test of the coating film that can be measured according to JIS K-5600 as an index. The pencil hardness becomes softer in the order of 9H, 8H, 7H, 6H, 5H, 4H, 3H, 2H, H, F, HB, B, 2B, 3B, 4B, 5B, 6B, with 9H being the hardest and 6B being the softest.

[0129] (Scratch resistance) When the resin composition of the present invention is tested by the following method, it is preferable that no obvious scratches are visually confirmed on the molded product.

[0130] Test method 1: A SUS ball with a diameter of 3 mmφ was pressed against the 2 mm thick part of the three-step plate with a load of 1 kg, and the plate was operated in one direction only once at a speed of 20 mm / s for a distance of 20 mm in an atmosphere of 23°C and a relative humidity of 50%RH, and the appearance after the test was visually confirmed.

[0131] Test method 2: Three pieces of gauze were stacked on a 10 mm × 10 mm flat plate, and the plate was pressed against the 2 mm thick part of the three-step plate with a load of 1 kg, and the plate was reciprocated 30 times at a speed of 20 mm / s for a distance of 20 mm in an atmosphere of 23°C and a relative humidity of 50%RH, and the appearance after the test was visually confirmed.

[0132] (Surface treatment) The molded article formed from the resin composition of the present invention can be subjected to various surface treatments. The surface treatment referred to here means forming a new layer on the surface layer of a resin molded article such as vapor deposition (physical vapor deposition, chemical vapor deposition, etc.), plating (electroplating, electroless plating, hot dip plating, etc.), painting, coating, printing, etc., and the commonly used methods can be applied. Specific examples of the surface treatment include various surface treatments such as hard coating, water / oil repellent coating, ultraviolet absorption coating, infrared absorption coating, and metallizing (vapor deposition, etc.). Hard coating is a particularly preferred and required surface treatment.

Examples

[0133] Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto. In the examples, "parts" means "parts by weight". The resins used and the evaluation methods in the examples are as follows.

[0134] 1. Polymer composition ratio (NMR) Each repeating unit was measured by proton NMR of JNM-AL400 manufactured by JEOL Ltd., and the polymer composition ratio (molar ratio) was calculated.

[0135] 2. Specific viscosity It was determined using an Ostwald viscometer from a solution prepared by dissolving 0.7 g of a polycarbonate resin in 100 ml of methylene chloride at 20°C. Specific viscosity (η SP ) = (t - t0) / t0 [t0 is the dropping time in seconds of methylene chloride, t is the dropping time in seconds of the sample solution]

[0136] 3. Haze The 2-mm-thick part of the three-step plate obtained by the following method was measured using a haze meter 300A manufactured by Nippon Denshoku Industries Co., Ltd.

[0137] 4. Cloudiness evaluation The presence or absence of cloudiness at each thickness of the three-step plate obtained by the following method was visually confirmed and judged according to the following criteria. 〇: No cloudiness is observed at any thickness of 3 mm, 2 mm, or 1 mm. ×: Cloudiness is observed at any one of the thicknesses of 3 mm, 2 mm, or 1 mm.

[0138] 5. Notched Charpy impact strength The ISO bending test specimens obtained by the following method were used to measure the notched Charpy impact strength in accordance with ISO 179.

[0139] 6. Pencil hardness Based on JIS K5400, in a constant temperature room with an ambient temperature of 23°C, a pencil was used to draw a line on the surface of the molded product while maintaining an angle of 45 degrees and applying a load of 750 g, and the surface condition was visually evaluated.

[0140] 7. Scratch resistance An AFT-15M reciprocating friction and wear tester manufactured by Orientec Co., Ltd. was used as the evaluation equipment.

[0141] Test method 1: A SUS ball with a diameter of 3 mm was mounted on a holder. The three-stage plate obtained by the following method was fixed on a reciprocating pedestal. It was brought into contact with the 2 mm thick part of the three-stage plate under a load of 1 kg. In such a contact state, in an atmosphere of 23°C and a relative humidity of 50%RH, the plate was moved in one direction only at a speed of 20 mm / s for a distance of 20 mm in the plane, and the appearance after the test was visually judged according to the following criteria, and ○ and △ were judged to have good scratch resistance. 〇: No scratches are observed on the molded product. △: Slight scratches are observed on the molded product. ×: Obvious scratches are observed on the molded product.

[0142] Test Method 2: A jig with three layers of gauze stacked on a 10 mm × 10 mm flat plate was attached to a holder. A three-step plate obtained by the following method was fixed on a reciprocating pedestal. It was brought into contact with a 1 kg load applied to the 2 mm thick part of the three-step plate. In such a contact state, the plate was reciprocated 30 times at a speed of 20 mm / s over a distance of 20 mm in the plane in an atmosphere of 23°C and 50% RH relative humidity. The appearance after the test was visually judged according to the following criteria, and ○ and Δ were judged to have good scratch resistance. ○: No scratches were confirmed on the molded product. Δ: Slight scratches were confirmed on the molded product. ×: Obvious scratches were confirmed on the molded product.

[0143] [Polycarbonate Resin (A)] PC-1 (Example): Structural unit derived from isosorbide (hereinafter ISS) / Structural unit derived from 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5,5)undecane (hereinafter SPG) / Structural unit derived from 1,9-nonanediol (hereinafter ND) = 72 / 21 / 7 (mol%), specific viscosity 0.396 PC-2 (Example): Structural unit derived from ISS / Structural unit derived from SPG / Structural unit derived from ND = 58 / 38 / 4 (mol%), specific viscosity 0.425 PC-3 (Comparative Example) Structural unit derived from ISS / Structural unit derived from ND = 88 / 12 (mol%), specific viscosity 0.366 PC-4 (Comparative Example) Structural unit derived from ISS / Structural unit derived from 1,4-cyclohexanedimethanol (hereinafter CHDM) = 70 / 30 (mol%), specific viscosity 0.378

[0144] [Acrylic Resin (B)] B-1 (Example): Acrypet VH001 manufactured by Mitsubishi Chemical Corporation (acrylic resin copolymerized from 95 mol% of methyl methacrylate and 5 mol% of methyl acrylate)

[0145] [Impact Resistance Modifier Composite Acrylic Resin (B + C)] B + C (Example): Acrypet VRL40 manufactured by Mitsubishi Chemical Corporation (Refractive index of impact resistance modifier: 1.492)

[0146] [Impact Resistance Modifier (C)] C-1 (Example): Kane Ace M-230 manufactured by Kaneka Corporation (Refractive index: 1.492) C-2 (Example): Metablen W-377 manufactured by Mitsubishi Chemical Corporation (Refractive index: 1.492) C-3 (Comparative Example): Metablen W-450A manufactured by Mitsubishi Chemical Corporation (Refractive index: 1.472)

[0147] [Unsaturated Fatty Acid Bisamide (D)] D-1 (Example): Ethylene Bisoleic Acid Amide (Alflow AD-281F manufactured by NOF Corporation)

[0148] [Saturated Fatty Acid Bisamide (E)] E-1 (Comparative Example): Ethylene Bisstearic Acid Amide (Alflow H-50S manufactured by NOF Corporation)

[0149] [Fatty Acid Ester (F)] F-1 (Comparative Example): Pentaerythritol Tetrastearate (Unister H-476 manufactured by NOF Corporation)

[0150] [Example 1] <Manufacture of Polycarbonate Resin> Isosorbide (hereinafter abbreviated as ISS) 364 parts, 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5,5)undecane (hereinafter abbreviated as SPG) 221 parts, 1,9-nonanediol (hereinafter abbreviated as ND) 39 parts, diphenyl carbonate (hereinafter abbreviated as DPC) 750 parts, and tetramethylammonium hydroxide 0.8×10 -2 parts and barium stearate 0.6×10 -4The part was heated to 200 °C in a nitrogen atmosphere and melted. Then, the temperature was raised to 220 °C over 30 minutes and the degree of vacuum was adjusted to 20.0 kPa. Then, the temperature was further raised to 240 °C over 30 minutes and the degree of vacuum was adjusted to 10 kPa. After holding at that temperature for 10 minutes, the degree of vacuum was reduced to 133 Pa or less over 1 hour. After the reaction was completed, it was discharged from the bottom of the reaction tank under nitrogen pressure, and while cooling in a water tank, it was cut with a pelletizer to obtain pellets (PC-1).

[0151] <Manufacture of Resin Composition> Polycarbonate resin PC-1, acrylic resin B-1, impact modifier C-1, and unsaturated fatty acid bisamide D-1 were used and mixed so that the weight ratio was 69:15:15:1, and then supplied to an extruder. Extrusion was carried out using a vented twin-screw extruder with a diameter of 30 mmφ [(Kobe Steel, Ltd. KTX-30)], and melt-kneaded at a screw rotation speed of 150 rpm, a discharge rate of 20 kg / h, and a vent vacuum degree of 3 kPa to obtain pellets. Regarding the extrusion temperature, it was carried out at 250 °C from the supply port to the die part. A part of the obtained pellets was dried in a hot air circulation dryer at 90 °C for 6 hours or more, and then using an injection molding machine, test pieces for evaluation (ISO bending test pieces (conforming to ISO178, ISO179, ISO75-1 and ISO75-2), 3-stage plates (1 mm t, 2 mm t, 3 mm t)) were molded at a cylinder temperature of 250 °C and a mold temperature of 80 °C. The evaluation results are shown in Table 1.

[0152] [Example 2] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:D-1 = 68:15:15:2 for extrusion. The results are described in Table 1.

[0153] [Example 3] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:D-1 = 66:15:15:4 for extrusion. The results are described in Table 1.

[0154] [Example 4] <Manufacture of Resin Composition> The same operations as in Example 1 were performed and the same evaluations were carried out, except that the blending weight ratio was PC-1:B + C:D-1 = 68:30:2 and extrusion was carried out. The results are shown in Table 1.

[0155] [Example 5] <Manufacture of Resin Composition> The same operations as in Example 1 were performed and the same evaluations were carried out, except that the blending weight ratio was PC-1:B-1:C-2:D-1 = 68:15:15:2 and extrusion was carried out. The results are shown in Table 1.

[0156] [Example 6] <Manufacture of Polycarbonate Resin> Using 294 parts of ISS, 400 parts of SPG, 22 parts of ND, and 750 parts of DPC as raw materials, the same operations as in Example 1 were performed to obtain pellets (PC-2). <Manufacture of Resin Composition> The same operations as in Example 1 were performed and the same evaluations were carried out, except that the blending weight ratio was PC-2:B-1:C-1:D-1 = 68:10:20:2 and extrusion was carried out. The results are shown in Table 1.

[0157] [Example 7] <Manufacture of Resin Composition> The same operations as in Example 1 were performed and the same evaluations were carried out, except that the blending weight ratio was PC-1:B-1:C-1:D-1 = 38:30:30:2 and extrusion was carried out. The results are shown in Table 1.

[0158] [Example 8] <Manufacture of Resin Composition> The same operations as in Example 1 were performed and the same evaluations were carried out, except that the blending weight ratio was PC-1:B-1:C-1:D-1 = 78:10:10:2 and extrusion was carried out. The results are shown in Table 1.

[0159] [Comparative Example 1] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:D-1 = 70:15:15:0 and extrusion was performed. The results are shown in Table 2.

[0160] [Comparative Example 2] [Manufacture of Polycarbonate Resin] 450 parts of isosorbide (hereinafter abbreviated as ISS), 67 parts of 1,9-nonanediol (hereinafter abbreviated as ND), 750 parts of diphenyl carbonate (hereinafter abbreviated as DPC), and 0.0033 parts of barium stearate as a catalyst were heated to 150 °C under a nitrogen atmosphere and melted. Then, the mixture was fed into a reaction tank, the heat medium temperature of the condenser was adjusted to 40 °C, the internal temperature of the resin was adjusted to 170 °C, and the degree of vacuum was adjusted to 13.4 kPa over 30 minutes. Then, the degree of vacuum was adjusted to 3.4 kPa over 20 minutes and held at that temperature for 10 minutes. Further, the degree of vacuum was set to 0.9 kPa over 30 minutes, the internal temperature of the resin was adjusted to 220 °C, and after holding at that temperature for 10 minutes, the degree of vacuum was set to 0.2 kPa, and the resin temperature was raised from 220 °C to 240 °C over 30 minutes. After reaching the specified viscosity, the mixture was discharged from the bottom of the reaction tank under nitrogen pressure and cut with a pelletizer while cooling in a water tank to obtain pellets (PC-3). [Manufacture of Resin Composition] The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-3:B-1:C-1:D-1 = 68:15:15:2 and extrusion was performed. The results are shown in Table 2.

[0161] [Comparative Example 3] [Manufacture of Polycarbonate Resin] Pellets were obtained (PC-4) by carrying out the same operations as in Example 1, except that 354 parts of ISS, 150 parts of CHDM, and 750 parts of DPC were used as raw materials. [Manufacture of Resin Composition] The type of polycarbonate was changed, and the same operations as in Example 1 were carried out, except that the blend weight ratio was PC-4:B-1:C-1:D-1 = 68:15:15:2 and extrusion was performed. The same evaluations were made. The results are shown in Table 2.

[0162] [Comparative Example 4] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:D-1 = 68:30:2 and extrusion was performed. The results are shown in Table 2.

[0163] [Comparative Example 5] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-3:D-1 = 68:15:15:2 and extrusion was performed. The results are shown in Table 2.

[0164] [Comparative Example 6] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:D-1 = 98:2 and extrusion was performed. The results are shown in Table 2.

[0165] [Comparative Example 7] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:C-1:D-1 = 68:30:2 and extrusion was performed. The results are shown in Table 2.

[0166] [Comparative Example 8] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:E-1 = 68:15:15:2 and extrusion was performed. The results are shown in Table 2.

[0167] [Comparative Example 9] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:F-1 = 68:15:15:2 and extrusion was performed. The results are shown in Table 2.

[0168] [Comparative Example 10] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:D-1 = 48:10:40:2 and it was extruded. The results are shown in Table 2.

[0169] [Comparative Example 11] <Manufacture of Resin Composition> The same operations as in Example 1 were carried out and the same evaluations were made, except that the blend weight ratio was PC-1:B-1:C-1:D-1 = 60:15:15:10 and it was extruded. The results are shown in Table 2.

[0170]

Table 1

[0171]

Table 2

Industrial Applicability

[0172] The resin composition of the present invention is useful as members such as optical lenses, optical disks, optical films, plastic substrates, optical cards, liquid crystal panels, headlamp lenses, light guide plates, diffuser plates, protective films, OPC binders, front panels, housings, trays, water tanks, lighting covers, signboards, resin windows, etc. It is.

Claims

1. A resin composition comprising 100 parts by weight in total of a polycarbonate resin (A) consisting of 5 to 85 mol% of a carbonate structural unit (a) represented by the following formula (1) and 15 to 95 mol% of another carbonate structural unit (b) among 100 mol% of all carbonate structural units, wherein the carbonate structural unit (b) is a carbonate structural unit (b) derived from at least one compound selected from the group consisting of an aliphatic diol compound, an alicyclic diol compound, and an aromatic dihydroxy compound, and an acrylic resin (B) containing 40 to 100 mol% of a structural unit derived from methyl methacrylate, 5 to 60 parts by weight of an impact modifier (C) having a refractive index of 1.485 or more and 1.495 or less, and 0.1 to 10 parts by weight of an unsaturated fatty acid bisamide (D), and the weight ratio of the polycarbonate resin (A) to the acrylic resin (B) is 30:70 to 99:

1. 【Chemical 1】 (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. The resin composition according to claim 1, wherein the haze of the 2 mm thickness of a three-stage plate (having thicknesses of 1 mm, 2 mm, and 3 mm) molded at a cylinder temperature of 250 °C and a mold temperature of 80 °C is 20% or less, and there is no cloudiness at all thicknesses.

3. The resin composition according to claim 1 or 2, wherein the notched Charpy impact strength measured according to ISO 179 is 10 kJ / m or more. ２ ​

4. The resin composition according to any one of claims 1 to 3, wherein the pencil hardness measured based on JIS K5400 is F or higher.

5. The resin composition according to any one of claims 1 to 4, wherein no obvious scratches are visually confirmed on the molded article when tested by the following method. (Test method) A SUS ball with a diameter of 3 mmφ is pressed against the 2 mm thickness part of the three-stage plate with a load of 1 kg, and the plate is operated only once in one direction at a speed of 20 mm / s for a distance of 20 mm in an atmosphere of 23 °C and a relative humidity of 50% RH, and the appearance after the test is visually confirmed.

6. The resin composition according to any one of claims 1 to 5, wherein no obvious scratches are visually confirmed on the molded article when tested by the following method. (Test Method) Three pieces of gauze were stacked on a 10 mm × 10 mm flat plate, pressed against the 2 mm thick part of a three-stage plate with a load of 1 kg, and the plate was reciprocated 30 times at a speed of 20 mm / s over a distance of 20 mm in an atmosphere of 23°C and 50% RH. The appearance after the test was visually confirmed.

7. A molded article obtained by injection molding the resin composition according to any one of Claims 1 to 6.

8. A film or sheet formed from the resin composition according to any one of Claims 1 to 6.

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