JP2005041988A - Polycarbonate resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polycarbonate resin composition excellent in heat resistance, stiffness and moldability. <P>SOLUTION: The polycarbonate resin comprises a polycarbonate copolymer consisting of a fluorene-based bisphenol represented by general formula [1] and a dihydroxy component represented by general formula [2]. The relationship between the proportion of the fluorene-based bisphenol and the specific viscosity of the polycarbonate resin satisfies a specific formula. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a polycarbonate resin. More specifically, the present invention relates to a polycarbonate resin having excellent heat resistance and rigidity and improved moldability.

  Conventionally, polycarbonate resins obtained by reacting bisphenol A with a carbonate precursor have been widely used in many fields as engineering plastics because of their excellent transparency, heat resistance, mechanical properties, and dimensional stability.

  In recent years, with the progress of miniaturization and miniaturization, a polycarbonate resin having further improved heat resistance and rigidity has been demanded.

In order to improve the heat resistance and rigidity of the polycarbonate resin, there is generally a method using bisphenols having a bulky structure that is difficult to move, and various polycarbonate resins have been proposed. Among them, a polycarbonate resin having a specific fluorene structure has been proposed (see, for example, Patent Documents 1 and 2). However, the polycarbonate resin having these structures has high heat resistance due to the structure in which molecules do not move easily, but the melt fluidity is not always good, and there is a problem in injection moldability and extrusion moldability.
JP-A-11-174424 JP-A-8-134198

  An object of the present invention is to provide a polycarbonate resin composition having excellent heat resistance and rigidity and improved moldability.

  As a result of intensive research aimed at achieving this object, the present inventor has found that the specific viscosity of an aromatic polycarbonate copolymer synthesized using a specific dihydric phenol and the proportion of fluorene-based bisphenol in the total dihydroxy component thereof. The inventors have found that the above object can be achieved by controlling the relationship in a specific range, and have reached the present invention.

  That is, according to the present invention, 5 to 95 mol% of all dihydroxy components are represented by the following general formula [1],

［式中、Ｒ^１〜Ｒ^４は夫々独立して水素原子、炭素原子数１〜９の芳香族基を含んでもよい炭化水素基又はハロゲン原子である。］で表されるフルオレン系ビスフェノール、好ましくは９，９−ビス（４−ヒドロキシ−３−メチルフェニル）フルオレン、９５〜５モル％が下記一般式［２］

[Wherein, R ^{1 to} R ⁴ each independently represent a hydrogen atom, a hydrocarbon group which may contain an aromatic group having 1 to 9 carbon atoms, or a halogen atom. ], Preferably 9,9-bis (4-hydroxy-3-methylphenyl) fluorene, 95 to 5 mol% is represented by the following general formula [2]

［式中、Ｒ^５〜Ｒ^８は夫々独立して水素原子、炭素原子数１〜９の芳香族基を含んでもよい炭化水素基又はハロゲンであり、Ｗは単結合、炭素原子数１〜２０の芳香族基を含んでもよい炭化水素基、Ｏ、Ｓ、ＳＯ、ＳＯ_２、ＣＯ又はＣＯＯ基である。］
で表されるジヒドロキシ成分からなるポリカーボネート共重合体よりなるポリカーボネート樹脂であって、該ポリカーボネート共重合体の全ジヒドロキシ成分中のフルオレン系ビスフェノールの割合（モル％）（Ｃ_ＦＬ）（以下フルオレン系ビスフェノール含有率とする。）と該ポリカーボネート樹脂の比粘度（η_ｓｐ）の関係が下記式を満足することを特徴とするポリカーボネート樹脂が提供される。
−０．０００８６Ｃ_ＦＬ＋０．２８≦η_ｓｐ≦−０．００４３４Ｃ_ＦＬ＋０．７１４

[Wherein, R ^{5 to} R ⁸ are each independently a hydrogen atom, a hydrocarbon group that may contain an aromatic group having 1 to 9 carbon atoms, or a halogen, and W is a single bond, having 1 to 20 carbon atoms. Or a hydrocarbon group, O, S, SO, SO ₂ , CO or COO group which may contain an aromatic group. ]
A polycarbonate resin comprising a polycarbonate copolymer composed of a dihydroxy component represented by the formula: wherein the proportion of fluorene-based bisphenol in the total dihydroxy component of the polycarbonate copolymer (mol%) (C _FL ) (hereinafter containing fluorene-based bisphenol) And the specific viscosity (η _sp ) of the polycarbonate resin satisfy the following formula.
−0.00086 C _FL + 0.28 ≦ η _sp ≦ −0.00434 C _FL +0.714

  In the aromatic polycarbonate copolymer of the present invention, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene as a dihydroxy component constituting the aromatic polycarbonate copolymer is 5-95 mol% of the total dihydroxy component, preferably 10- It is 95 mol%, More preferably, it is 30-85 mol%. If it is less than 5 mol%, it is not preferable because it is an unsatisfactory property as a heat-resistant material which is the object of the present invention.

  The 9,9-bis (4-hydroxy-3-methylphenyl) fluorene has a b value of preferably 6.0 or less, more preferably 5. measured by measuring a solution of 10 g in 50 ml of ethanol at an optical path length of 30 mm. 5 or less, more preferably 5.0 or less. When the b value is within the above range, a molded product formed from the obtained polycarbonate copolymer has a high hue and strength, and a stretched film property is also preferable.

  The 9,9-bis (4-hydroxy-3-methylphenyl) fluorene is usually obtained by the reaction of o-cresol and fluorenone. The 9,9-bis (4-hydroxy-3-methylphenyl) fluorene having the specific b value can be obtained by performing a specific treatment to remove impurities. Specifically, after the reaction between o-cresol and fluorenone, unreacted o-cresol is distilled off, and the residue is dissolved in an alcohol, ketone, or benzene derivative solvent, and activated clay or activated carbon is added thereto. In addition, after filtration, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene purified by filtering the product crystallized from the filtrate can be obtained. Examples of impurities to be removed include 2,4′-dihydroxy form, 2,2′-dihydroxy form and impurities whose structure is unknown. The alcohol solvent used for such purification is preferably a lower alcohol such as methanol, ethanol, propanol or butanol, and the ketone solvent is preferably a lower aliphatic ketone such as acetone, methyl ethyl ketone, methyl isopropyl ketone or cyclohexanone and a mixture thereof. As the benzene derivative solvent, toluene, xylene, benzene and a mixture thereof are preferable. The amount of the solvent used is sufficient if the fluorene compound is sufficiently dissolved, and is usually about 2 to 10 times the amount of the fluorene compound. As the activated clay, a commercially available powdery or granular silica-alumina main component is used. Further, as the activated carbon, commercially available powdery or granular materials are used.

  The other dihydroxy component represented by the above general formula [2] used in the aromatic polycarbonate copolymer of the present invention may be any one that is usually used as a dihydroxy component of an aromatic polycarbonate. For example, hydroquinone, resorcinol 4,4'-biphenol, 1,1-bis (4-hydroxyphenyl) ethane (bisphenol E), 2,2-bis (4-hydroxyphenyl) propane (bisphenol A), 2,2-bis (4- Hydroxy-3-methylphenyl) propane (bisphenol C), 2,2-bis (4-hydroxyphenyl) butane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1,1-bis (4 -Hydroxyphenyl) cyclohexane (bisphenol Z), 1,1-bis (4- Droxyphenyl) -3,3,5-trimethylcyclohexane, 2,2-bis (4-hydroxyphenyl) pentane, 4,4 '-(p-phenylenediisopropylidene) diphenol, α, α'-bis ( 4-hydroxyphenyl) -m-diisopropylbenzene (bisphenol M), 1,1-bis (4-hydroxyphenyl) -4-isopropylcyclohexane, and the like. Among them, bisphenol A, bisphenol Z, bisphenol C, bisphenol E, Bisphenol M is preferred, and bisphenol A is particularly preferred.

In the aromatic polycarbonate resin of the present invention, the relationship between the specific viscosity at 20 ° C. and the fluorene-based bisphenol content (mol%) (C _FL ) in a solution obtained by dissolving the polymer in methylene chloride is −0.00086 C _FL + 0.28 ≦ η _SP ≦ −0.00434C _FL +0.714
Preferably −0.00086 C _FL + 0.28 ≦ η _SP ≦ −0.00295 C _FL +0.54
More preferably, −0.00086C _FL + 0.28 ≦ η _SP ≦ −0.00205 C _FL +0.45
It is. If the specific viscosity is within the above range, the strength of the molded product, particularly the sheet, is sufficiently strong, the melt viscosity and the solution viscosity are appropriate, and handling is easy and preferable.

  The aromatic polycarbonate of the present invention is produced by a reaction means known per se for producing an ordinary aromatic polycarbonate resin, for example, a method of reacting an aromatic dihydroxy component with a carbonate precursor such as phosgene or carbonic acid diester. Next, basic means for these manufacturing methods will be briefly described.

  In a reaction using, for example, phosgene as a carbonate precursor, the reaction is usually performed in the presence of an acid binder and a solvent. As the acid binder, for example, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide or an amine compound such as pyridine is used. As the solvent, for example, halogenated hydrocarbons such as methylene chloride and chlorobenzene are used. In order to accelerate the reaction, a catalyst such as a tertiary amine or a quaternary ammonium salt can also be used. In that case, reaction temperature is 0-40 degreeC normally, and reaction time is several minutes-5 hours.

  The transesterification reaction using a carbonic acid diester as a carbonate precursor is performed by a method in which an aromatic dihydroxy component in a predetermined ratio is stirred with a carbonic acid diester while heating with an inert gas atmosphere to distill the generated alcohol or phenols. . The reaction temperature varies depending on the boiling point of the alcohol or phenol produced, but is usually in the range of 120 to 300 ° C. The reaction is completed while distilling off the alcohol or phenol produced under reduced pressure from the beginning.

  Moreover, in order to accelerate | stimulate reaction, the catalyst normally used for transesterification can also be used. Examples of the carbonic acid diester used in the transesterification include diphenyl carbonate, dinaphthyl carbonate, bis (diphenyl) carbonate, dimethyl carbonate, diethyl carbonate, and dibutyl carbonate. Of these, diphenyl carbonate is particularly preferred.

  In the aromatic polycarbonate of the present invention, monofunctional phenols usually used as a terminal stopper can be used in the polymerization reaction. Particularly in the case of a reaction using phosgene as a carbonate precursor, monofunctional phenols are generally used as a terminator for molecular weight control, and the resulting aromatic polycarbonate copolymer has a monofunctional end. Since it is blocked by a group based on phenols, it is superior in thermal stability compared to other groups.

  Such monofunctional phenols only need to be used as a terminal terminator for aromatic polycarbonate resins, and are generally phenols or lower alkyl-substituted phenols, and monofunctional phenols represented by the following general formula: Can show.

［式中、Ａは水素原子、炭素数１〜９の直鎖または分岐のアルキル基あるいはアリールアルキル基であり、ｒは１〜５、好ましくは１〜３の整数である。］

[Wherein, A is a hydrogen atom, a linear or branched alkyl group having 1 to 9 carbon atoms or an arylalkyl group, and r is an integer of 1 to 5, preferably 1 to 3. ]

  Specific examples of the monofunctional phenols include phenol, p-tert-butylphenol, p-cumylphenol and isooctylphenol.

  Further, as other monofunctional phenols, phenols or benzoic acid chlorides having a long chain alkyl group or an aliphatic ester group as a substituent, or long chain alkyl carboxylic acid chlorides can be used, When these are used to block the ends of the aromatic polycarbonate copolymers, they not only function as end terminators or molecular weight regulators, but also improve the melt fluidity of the resin and facilitate molding processes. The physical properties are also improved. In particular, it has the effect of reducing the water absorption rate of the resin and is preferably used. These are represented by the following general formulas [Ia] to [Ih].

[In the general formulas [Ia] to [Ih], X represents —RO—, —R—CO—O—, or —R—O—CO—, wherein R represents a single bond or A divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, preferably 1 to 5 carbon atoms, T represents a single bond or a bond similar to the above X, and n represents an integer of 10 to 50.
Q represents a halogen atom or a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, preferably 1 to 5 carbon atoms, p represents an integer of 0 to 4, Y represents 1 to 10 carbon atoms, preferably 1 to 1 carbon atoms. 5 is a divalent aliphatic hydrocarbon group, W ¹ is a hydrogen atom, —CO—R ¹⁷ , —CO—O—R ¹⁸ or R ¹⁹ , wherein R ¹⁷ , R ¹⁸ and R ¹⁹ are 1 to 10 carbon atoms, preferably 1 to 5 monovalent aliphatic hydrocarbon groups, 4 to 8 carbon atoms, preferably 5 to 6 monovalent alicyclic hydrocarbon groups or 6 to 15 carbon atoms, respectively. Preferably 6-12 monovalent | monohydric aromatic hydrocarbon group is shown.
a represents an integer of 4 to 20, preferably 5 to 10, m represents an integer of 1 to 100, preferably 3 to 60, particularly preferably 4 to 50, and Z represents a single bond or a carbon number of 1 to 10, preferably an 1-5 divalent aliphatic hydrocarbon group, ^{W 2} is a hydrogen atom, C1-10, preferably 1 to 5 monovalent aliphatic hydrocarbon group, having 4 to 8 carbon atoms, Preferably, it represents a monovalent alicyclic hydrocarbon group having 5 to 6 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 15 carbon atoms, preferably 6 to 12 carbon atoms. ]

  Of these, the substituted phenols of [Ia] and [Ib] are preferable. As the substituted phenols of [Ia], those having n of 10 to 30, particularly 10 to 26 are preferable. Specific examples thereof include decylphenol, dodecylphenol, tetradecylphenol, hexadecylphenol, and octadecyl. Phenol, eicosylphenol, docosylphenol and triacontylphenol can be mentioned.

  Further, as the substituted phenols of [Ib], compounds in which X is —R—CO—O— and R is a single bond are suitable, and those in which n is 10 to 30, particularly 10 to 26. Specific examples thereof include, for example, decyl hydroxybenzoate, dodecyl hydroxybenzoate, tetradecyl hydroxybenzoate, hexadecyl hydroxybenzoate, eicosyl hydroxybenzoate, docosyl hydroxybenzoate and triacontyl hydroxybenzoate.

  In the substituted phenols or substituted benzoic acid chlorides represented by the above general formulas [Ia] to [Ig], the position of the substituent is generally preferably the p-position or the o-position, and a mixture of both is preferable.

  The monofunctional phenols are desirably introduced into at least 5 mol%, preferably at least 10 mol% of the terminals of the resulting aromatic polycarbonate copolymer, and the monofunctional phenols are used alone. Or you may use it in mixture of 2 or more types.

  Further, in the aromatic polycarbonate copolymer of the present invention, when 9,9-bis (4-hydroxy-3-methylphenyl) fluorene is 60 mol% or more of the total aromatic hydroxy component, the fluidity of the resin Therefore, it is preferable to use the substituted phenols or substituted benzoic acid chlorides represented by the above general formulas [Ia] to [Ig] as a terminal terminator.

  The aromatic polycarbonate copolymer of the present invention may be a polyester carbonate copolymerized with an aromatic dicarboxylic acid, for example, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid or a derivative thereof, as long as the gist of the present invention is not impaired. . Moreover, the branched polycarbonate which copolymerized a small amount of trifunctional compounds may be sufficient.

  As a method for producing a polycarbonate resin from the polycarbonate resin solution thus obtained, a conventionally known method is used as a method for granulating an amorphous polymer. That is, there are a toothed kneader method, a method using a small amount of a non-solvent, and a steam tube dryer method, among which the toothed kneader method is preferable. The polycarbonate resin powder thus obtained is distilled with a drier after the solvent is distilled off to obtain a polycarbonate resin powder.

  The aromatic polycarbonate copolymer of the present invention has a glass transition point of preferably 160 ° C. or higher, more preferably 180 ° C. or higher, and further preferably 200 ° C. or higher.

  The aromatic polycarbonate resin composition of the present invention is appropriately added with a modifying agent such as a mold release agent, a fluorescent brightening agent, a heat stabilizer, an antioxidant, an ultraviolet absorber, a coloring agent, an antistatic agent, an antibacterial agent Can be used.

  The fluorescent whitening agent is not particularly limited as long as it is used for improving the color tone of a synthetic resin or the like to white or bluish white. For example, stilbene, benzimidazole, naphthalimide, rhodamine, A coumarin type, an oxazine type compound, etc. are mentioned.

  As the UV absorber, a benzotriazole UV absorber, a triazine UV absorber, a benzoxazine UV absorber, or a benzophenone UV absorber is used.

  Examples of the benzotriazole ultraviolet absorber include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole and 2- (2′-hydroxy-3 ′-(3,4,5,6-tetrahydrophthalimidomethyl). ) -5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-5′-tert-octylphenyl) ) Benzotriazole, 2- (3'-tert-butyl-5'-methyl-2'-hydroxyphenyl) -5-chlorobenzotriazole, 2,2'-methylenebis (4- (1,1,3,3- Tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol), 2- (2'-hydroxy-3 ', 5'-bi) (Α, α-dimethylbenzyl) phenyl) -2H-benzotriazole, 2- (3 ′, 5′-di-tert-amyl-2′-hydroxyphenyl) benzotriazole, 5-trifluoromethyl-2- (2 -Hydroxy-3- (4-methoxy-α-cumyl) -5-tert-butylphenyl) -2H-benzotriazole and the like.

  Among them, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′-(3,4,5,6-tetrahydrophthalimidomethyl) -5′-methylphenyl) Benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole, 2- (3 '-Tert-butyl-5'-methyl-2'-hydroxyphenyl) -5-chlorobenzotriazole is preferred, and 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole is more preferred.

  As the triazine-based ultraviolet absorber, hydroxyphenyltriazine-based, for example, trade name Tinuvin 400 (manufactured by Ciba Specialty Chemicals) is preferable.

  Examples of the benzoxazine-based ultraviolet absorber include 2-methyl-3,1-benzoxazin-4-one, 2-butyl-3,1-benzoxazine-4-one, 2-phenyl-3,1-benzoxazine -4-one, 2- (1- or 2-naphthyl) -3,1-benzoxazin-4-one, 2- (4-biphenyl) -3,1-benzoxazin-4-one, 2,2 ′ -Bis (3,1-benzoxazin-4-one), 2,2'-p-phenylenebis (3,1-benzoxazin-4-one, 2,2'-m-phenylenebis (3,1- Benzoxazin-4-one), 2,2 ′-(4,4′-diphenylene) bis (3,1-benzoxazin-4-one), 2,2 ′-(2,6 or 1,5-naphthalene) ) Bis (3,1-benzoxazin-4-one) 1,3,5-tris (3,1-benzoxazin-4-on-2-yl) benzene and the like, among others, 2,2′-p-phenylenebis (3,1-benzoxazine-4- ON) is preferred.

  Examples of the benzophenone ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2-hydroxy-4-methoxy-2′-carboxybenzophenone, 2,4-dihydroxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone and the like can be mentioned, among which 2-hydroxy-4-n-octoxybenzophenone is preferable. These ultraviolet absorbers may be used alone or in combination of two or more.

  These ultraviolet absorbers are 0.01 to 5% by weight, preferably 0.02 to 3% by weight, particularly preferably 0.05, based on 100% by weight of the total amount of the polycarbonate resin and the ultraviolet absorber. ~ 2% by weight. If it is less than 0.01% by weight, the ultraviolet absorption performance is insufficient, and if it exceeds 5% by weight, the hue of the resin may be deteriorated.

  In the present invention, a bluing agent may be used. Examples of such a bluing agent include Macrolex Violet manufactured by Bayer Co., Ltd., Dialresin Violet manufactured by Mitsubishi Chemical Co., Ltd., Dial Resin Blue, Sand Co., Ltd. Terazole blue and the like are available, and the most suitable is macrolex violet. These bluing agents are preferably incorporated into the aromatic polycarbonate resin at a concentration of 0.1 to 3 ppm, more preferably 0.3 to 1.5 ppm, and most preferably 0.3 to 1.2 ppm.

  If necessary, the aromatic polycarbonate resin composition of the present invention is blended with at least one phosphorus compound selected from the group consisting of phosphoric acid, phosphorous acid, phosphonic acid, phosphonous acid, and esters thereof. Can do. The amount of the phosphorus compound is preferably 0.0001 to 0.05% by weight, more preferably 0.0005 to 0.02% by weight, and 0.001 to 0.01 based on the aromatic polycarbonate resin composition. Weight percent is particularly preferred. By blending this phosphorus compound, the thermal stability of the aromatic polycarbonate resin composition is improved, and a decrease in molecular weight and a deterioration in hue during molding are prevented.

  The phosphorus compound is at least one phosphorus compound selected from the group consisting of phosphoric acid, phosphorous acid, phosphonic acid, phosphonous acid, and esters thereof, preferably the following general formula

［式中、Ｒ^５〜Ｒ^１６は、それぞれ独立して、水素原子、メチル、エチル、プロピル、イソプロピル、ブチル、イソブチル、ｔｅｒｔ−ブチル、ペンチル、ヘキシル、ヘプチル、オクチル、ノニル、デシル、ドデシル、ヘキサデシル、オクタデシルなどの炭素数１〜２０のアルキル基、フェニル、トリル、ナフチルなどの炭素数６〜１５のアリール基またはベンジル、フェネチルなどの炭素数７〜１８のアラルキル基を表し、また１つの化合物中に２つのアルキル基が存在する場合は、その２つのアルキル基は互いに結合して環を形成していてもよい。］
よりなる群から選択された少なくとも１種のリン化合物である。

[Wherein, R ^{5 to} R ¹⁶ are each independently a hydrogen atom, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, dodecyl, hexadecyl. Represents an alkyl group having 1 to 20 carbon atoms such as octadecyl, an aryl group having 6 to 15 carbon atoms such as phenyl, tolyl and naphthyl, or an aralkyl group having 7 to 18 carbon atoms such as benzyl and phenethyl; In the case where two alkyl groups are present, the two alkyl groups may be bonded to each other to form a ring. ]
At least one phosphorus compound selected from the group consisting of:

  Examples of the phosphorus compound represented by the above formula (1) include triphenyl phosphite, trisnonylphenyl phosphite, tris (2,4-di-tert-butylphenyl) phosphite, tridecyl phosphite, and trioctyl phosphite. , Trioctadecyl phosphite, didecyl monophenyl phosphite, dioctyl monophenyl phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, bis (2,6-di -Tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, bis (nonylphenyl) pentae Sri diphosphite, bis (2,4-di -tert- butylphenyl) pentaerythritol diphosphite, and distearyl pentaerythritol phosphite.

  Examples of the phosphorus compound represented by the formula (2) include tributyl phosphate, trimethyl phosphate, triphenyl phosphate, triethyl phosphate, diphenyl monoorthoxenyl phosphate, dibutyl phosphate, dioctyl phosphate, diisopropyl phosphate, and the like (3 ) The phosphorus compound represented by the formula includes tetrakis (2,4-di-tert-butylphenyl) -4,4-diphenylenephosphonite, and the compound represented by the formula (4) Examples thereof include dimethyl benzenephosphonate, diethyl benzenephosphonate, and dipropyl benzenephosphonate.

  Among these phosphorus compounds, trisnonylphenyl phosphite, tris (2,4-di-tert-butylphenyl) phosphite, tetrakis (2,4-di-tert-butylphenyl) -4,4-diphenylene Phosphonite is preferably used.

  To the polycarbonate resin composition of the present invention, an antioxidant generally known for the purpose of antioxidant can be added. Examples thereof include phenolic antioxidants. Specifically, for example, triethylene glycol-bis [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6 -Hexanediol-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], pentaerythritol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl -4-hydroxybenzyl) benzene, N, N-hexamethylenebis (3,5-di-tert-butyl-4- Loxy-hydrocinnamide), 3,5-di-tert-butyl-4-hydroxy-benzylphosphonate-diethyl ester, tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 3.9 -Bis {1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl} -2,4,8,10-tetraoxaspiro (5 5) Undecane etc. are mentioned. The range of preferable addition amount of these antioxidants is 0.0001 to 0.05% by weight with respect to the polycarbonate copolymer.

  Furthermore, a higher fatty acid ester of a monohydric or polyhydric alcohol can be added to the aromatic polycarbonate resin composition of the present invention as necessary.

  The higher fatty acid ester is preferably a partial ester or a total ester of a monovalent or polyhydric alcohol having 1 to 20 carbon atoms and a saturated fatty acid having 10 to 30 carbon atoms. Further, partial esters or total esters of such monohydric or polyhydric alcohols and saturated fatty acids include stearic acid monoglyceride, stearic acid monosorbate, behenic acid monoglyceride, pentaerythritol monostearate, pentaerythritol tetrastearate, propylene glycol. Examples thereof include monostearate, stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, isopropyl palmitate, 2-ethylhexyl stearate, among which stearic acid monoglyceride and pentaerythritol tetrastearate are preferably used. .

  The amount of the ester of the alcohol and the higher fatty acid is preferably 0.01 to 2% by weight, more preferably 0.015 to 0.5% by weight, more preferably 0.02 to 0.5% by weight based on the aromatic polycarbonate resin composition. More preferred is 0.2% by weight. If the blending amount is within this range, it is preferable that the release property is excellent and the release agent does not migrate and adhere to the metal surface.

  The aromatic polycarbonate copolymer of the present invention may further contain additives such as lubricants and fillers and other thermoplastic resins as long as the object of the present invention is not impaired.

  As a method for obtaining a molded product from the aromatic polycarbonate resin of the present invention, injection molding, extrusion molding, blow molding or the like is used, and as a method for producing a film or sheet, it has excellent thickness uniformity, gel, A method that does not cause optical defects such as fish eye and scratch is preferred, and examples thereof include a melt extrusion method and a calender method.

  A molded product produced by such a method has high light transmittance, and also has high heat resistance and rigidity, so that it is suitably used for an optical molded product with little warpage and excellent color tone.

  The polycarbonate resin composition of the present invention has excellent heat resistance, rigidity, and excellent melt fluidity, so that a molded product having excellent color tone can be obtained by injection molding and extrusion molding. The industrial effects brought about by the present invention, such as extremely good solubility, are exceptional.

The following examples further illustrate the present invention. The part in an Example is a weight part and% is weight%. The evaluation was based on the following method.
(1) Specific viscosity: 0.7 g of polymer was dissolved in 100 ml of methylene chloride and measured at a temperature of 20 ° C.
(2) Glass transition point (Tg): Measured by DSC2910 manufactured by TA Instruments.
(3) b value of monomer solution: 10 g of a sample was dissolved in 50 ml of ethanol and measured with a color difference meter 300A by Nippon Denshoku Co., Ltd. in a sample tube with an optical path length of 30 mm.
(4) C _BCF (Percentage of BCF in the total hydroxy component of the copolymer): Measured by proton NMR of JNM-AL400 manufactured by JEOL Ltd.
(5) Total light transmittance: It measured using Nippon Denshoku Co., Ltd. MDH-300A based on ASTM D-1003.
(6) Formability: If the steel plate is normally molded by injection molding on a 50 × 90 × 2 mm sample board using a N20C injection molding machine manufactured by Nippon Steel, ○, if a short shot or cracking occurs on the molded piece, × did.

[Example 1]
A reactor equipped with a thermometer, a stirrer, and a reflux condenser was charged with 24623 parts of ion-exchanged water and 4153 parts of a 48% aqueous sodium hydroxide solution. After dissolving 1936.9 parts of -3-methylphenyl) fluorene, 2726 parts of 2,2-bis (4-hydroxyphenyl) propane (hereinafter sometimes abbreviated as “bisphenol A”) and 8 parts of hydrosulfite, After adding 18188 parts of methylene chloride, 1994 parts of phosgene was blown in at a temperature of 15 to 25 ° C. with stirring for 60 minutes. After the completion of phosgene blowing, a solution prepared by dissolving 102.5 parts of p-tert-butylphenol in 330 parts of methylene chloride and 692.1 parts of 48% aqueous sodium hydroxide solution were added, and after emulsification, 5.8 parts of triethylamine was added and 28 to 28 The reaction was terminated by stirring for 1 hour at 33 ° C. After completion of the reaction, the product is diluted with methylene chloride, washed with water, acidified with hydrochloric acid and washed with water. When the conductivity of the aqueous phase is almost the same as that of ion-exchanged water, the methylene chloride phase is dehydrated and the methylene chloride is evaporated. Thus, a polycarbonate powder slurry was obtained. The obtained slurry was pulverized, the solvent was distilled off with hot water, and then dried to obtain a powder. The polycarbonate obtained had a molar ratio of biscresol fluorene to bisphenol A of 30:70 (polymer yield 97%). The specific viscosity of this polymer was 0.337 and Tg was 190 ° C. To 100 parts of this powder, 0.05 part of tris (2,4-di-tert-butylphenyl) phosphite, 0.01 part of octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate , 0.03 part of pentaerythritol tetrastearate was mixed, and the extruder temperature was 280 to 320 ° C., the die temperature was 290 to 330 ° C., and the degree of vacuum of the vent part was maintained at 27 kPa by a vented extruder, and the mixture was extruded by extrusion. Turned into. The pellets were dried at 120 ° C. for 4 hours, then injection-molded into 50 × 90 × 2 mm test pieces with a N20C injection molding machine manufactured by Nippon Steel, and the evaluation results are shown in Table 1.

[Example 2]
The ratio of biscresol fluorene to bisphenol A in a molar ratio was 50:50 in the same manner as in Example 1 except that the amount of biscresol fluorene used in Example 1 was 3171.4 parts and the amount of bisphenol A used was 1913 parts. As a result, 5300 parts (yield 96%) of the polymer was obtained. This polymer had a specific viscosity of 0.320 and Tg of 205 ° C. The results of evaluating this powder in the same manner as in Example 1 are shown in Table 1.

[Example 3]
In the same apparatus as in Example 1, 35315 parts of ion-exchanged water and 3920 parts of 48% sodium hydroxide were added, and α, α′-bis (4-hydroxyphenyl) -m-diisopropylbenzene (abbreviated as bisphenol M) 2954.9. Parts, 3228.1 parts of biscresol fluorene and 14 parts of hydrosulfite were added, 12775 parts of methylene chloride was added, and 1946 parts of phosgene was blown in at 45 ° C. with stirring for 15 minutes. After the completion of phosgene blowing, 108.5 parts of p-tert-butylphenol and 710.5 parts of 48% aqueous sodium hydroxide solution were added to emulsify, 4.55 parts of triethylamine was added, and the reaction was stirred for 1 hour at 28 to 33 ° C. Ended. This was treated in the same manner as in Example 1 to obtain a polymer having a molar ratio of bisphenol M to biscresol fluorene units of 50:50 (yield 98%). This product had a specific viscosity of 0.250 and Tg of 180 ° C. The results of evaluating this powder in the same manner as in Example 1 are shown in Table 1.

[Comparative Example 1]
Except for changing the p-tert-butylphenol of Example 1 to 63.0 parts, a polycarbonate having a molar ratio of biscresol fluorene and bisphenol A in the unit of 50:50 was obtained in the same manner as in Example 1 (yield 98 .5%). This had a specific viscosity of 0.504 and Tg of 206 ° C. The results of evaluating this powder in the same manner as in Example 1 are shown in Table 1.

[Comparative Example 2]
Except for changing p-tert-butylphenol of Example 1 to 176.5 parts, a polycarbonate having a molar ratio of biscresol fluorene to bisphenol A in the unit of 50:50 was obtained in the same manner as in Example 1 (yield 99 %). This product had a specific viscosity of 0.223 and Tg of 202 ° C. The results of evaluating this powder in the same manner as in Example 1 are shown in Table 1.

Claims (8)

5 to 95 mol% of all dihydroxy components are represented by the following general formula [1],

[Wherein, R ^{1 to} R ⁴ each independently represent a hydrogen atom, a hydrocarbon group which may contain an aromatic group having 1 to 9 carbon atoms, or a halogen atom. Is a fluorene-based bisphenol represented by
95-5 mol% is the following general formula [2]

[Wherein, R ^{5 to} R ⁸ are each independently a hydrogen atom, a hydrocarbon group or a halogen atom which may contain an aromatic group having 1 to 9 carbon atoms, and W is a single bond, having 1 to 1 carbon atoms. A hydrocarbon group optionally containing 20 aromatic groups, an O, S, SO, SO ₂ , CO or COO group. ]
The ratio of the fluorene-based bisphenol in the total dihydroxy component of the polycarbonate copolymer (mol%) (C _FL ) and the ratio of the polycarbonate resin. A polycarbonate resin characterized in that the relationship of viscosity (η _sp ) satisfies the following formula:
−0.00086 C _FL + 0.28 ≦ η _sp ≦ −0.00434 C _FL +0.714   The aromatic polycarbonate resin according to claim 1, wherein the fluorene-based bisphenol is 9,9-bis (4-hydroxy-3-methylphenyl) fluorene (sometimes abbreviated as biscresol fluorene or BCF).   The 9,9-bis (4-hydroxy-3-methylphenyl) fluorene has a b value of 6.0 or less measured by measuring a solution of 10 g in 50 ml of ethanol at an optical path length of 30 mm. The polycarbonate resin in any one.   The compound represented by the general formula [2] is 2,2-bis (4-hydroxyphenyl) propane and / or α, α'-bis (4-hydroxyphenyl) -m-diisopropylbenzene. 4. The polycarbonate resin according to any one of 3.   A molded article comprising the aromatic polycarbonate resin according to claim 1.   Molded products are pickup lenses, camera lenses, microarray lenses, projector lenses and Fresnel lenses, optical path conversion parts such as prisms and optical fibers, reflow soldering parts, optical disks, plastic mirrors, various cases, trays or containers. The molded product according to claim 5.   A film or sheet comprising the aromatic polycarbonate resin according to claim 1.   The film or sheet according to claim 7, wherein the film or sheet is a retardation film, a plastic substrate, a protective film for an optical disk, a light guide plate, or a diffusion plate.