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JP7075223B2 - Polycarbonate resin composition - Google Patents
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JP7075223B2 - Polycarbonate resin composition - Google Patents

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JP7075223B2
JP7075223B2 JP2018008857A JP2018008857A JP7075223B2 JP 7075223 B2 JP7075223 B2 JP 7075223B2 JP 2018008857 A JP2018008857 A JP 2018008857A JP 2018008857 A JP2018008857 A JP 2018008857A JP 7075223 B2 JP7075223 B2 JP 7075223B2
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博友 片野
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Daicel Polymer Ltd
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Description

本発明は、表面が傷つきにくい成形体が得られるポリカーボネート系樹脂組成物に関する。 The present invention relates to a polycarbonate-based resin composition capable of obtaining a molded product whose surface is not easily scratched.

自動車に搭載されるオーディオ機器などの電子機器筐体用途においては、美しい外観と共に、製品の破壊時に鋭利な破面が発生しないことが要求されるため、従来から透明で伸びがあるポリカーボネート樹脂が使用されている。
一方、ポリカーボネート樹脂は表面硬度が低いため、製品使用時に傷が目立ち、外観が悪化しやすいという問題があった。
For electronic device housing applications such as audio equipment mounted on automobiles, it is required to have a beautiful appearance and no sharp fracture surface when the product is destroyed, so a transparent and stretchable polycarbonate resin has been used conventionally. Has been done.
On the other hand, since the surface hardness of the polycarbonate resin is low, there is a problem that scratches are conspicuous when the product is used and the appearance tends to be deteriorated.

特許文献1、2の発明は、ポリカーボネート樹脂と重量平均分子量5,000~30,000のメチルメタクリレート単位を含む重合体を含むポリカーボネート系樹脂組成物であり、耐傷つき性(耐スクラッチ性)が良い成形体が得られることが記載されている。 The inventions of Patent Documents 1 and 2 are polycarbonate-based resin compositions containing a polycarbonate resin and a polymer containing a methyl methacrylate unit having a weight average molecular weight of 5,000 to 30,000, and a molded product having good scratch resistance (scratch resistance) can be obtained. It is stated that it will be done.

特開2016-153442号公報Japanese Unexamined Patent Publication No. 2016-153442 特開2016-153443号公報Japanese Unexamined Patent Publication No. 2016-153443

本発明は、表面硬度が高く、透明な成形体が得られるポリカーボネート系樹脂組成物を提供することを課題とする。 An object of the present invention is to provide a polycarbonate-based resin composition having a high surface hardness and a transparent molded body.

本発明は、(A)ポリカーボネート系樹脂と(B)重量平均分子量5,000~30,000のメチルメタクリレート単位を含む重合体を含有しており、
(A)成分のポリカーボネート系樹脂が、下記一般式(I)で表される繰り返し単位を含むポリカーボネートブロックと、下記一般式(II)で表される繰り返し単位を含むポリオルガノシロキサンブロックとを有する、粘度平均分子量が10,000~40,000であるポリカーボネート-ポリオルガノシロキサン共重合体であり、
(A)成分と(B)成分の合計量中の(A)成分の含有割合が50~95質量%、(B)成分の含有割合が5~50質量%である、ポリカーボネート系樹脂組成物と、それから得られる成形体を提供する。
The present invention contains (A) a polycarbonate-based resin and (B) a polymer containing a methyl methacrylate unit having a weight average molecular weight of 5,000 to 30,000.
The polycarbonate-based resin of the component (A) has a polycarbonate block containing a repeating unit represented by the following general formula (I) and a polyorganosiloxane block containing a repeating unit represented by the following general formula (II). A polycarbonate-polyorganosiloxane copolymer having a viscosity average molecular weight of 10,000 to 40,000.
A polycarbonate resin composition in which the content ratio of the component (A) in the total amount of the component (A) and the component (B) is 50 to 95% by mass and the content ratio of the component (B) is 5 to 50% by mass. , The molded article obtained from it is provided.

Figure 0007075223000001
Figure 0007075223000001

(一般式(I)中、
1およびR2は、それぞれ独立にハロゲン原子、炭素数1~6のアルキル基または炭素数1~6のアルコキシ基を示し、
Xは単結合、炭素数1~8のアルキレン基、炭素数2~8のアルキリデン基、炭素数5~15のシクロアルキレン基、炭素数5~15のシクロアルキリデン基、フルオレンジイル基、炭素数7~15のアリールアルキレン基、炭素数7~15のアリールアルキリデン基、-S-、-SO-、-SO2-、-O-またはCO-を示し、
aおよびbは、それぞれ独立に0~4の整数を示す。
一般式(II)中、
3およびR4は、それぞれ独立に水素原子、ハロゲン原子、炭素数1~6のアルキル基、炭素数1~6のアルコキシ基または炭素数6~12のアリール基を示し、
平均繰り返し数nは、ポリオルガノシロキサンブロック中のシロキサン繰り返し単位の合計数を示す。)
(In general formula (I),
R 1 and R 2 independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, respectively.
X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorinyl group, and a carbon number of carbon atoms. Representing an arylalkylene group of 7 to 15, an arylalkylidene group of 7 to 15 carbon atoms, -S-, -SO-, -SO 2- , -O- or CO-,
a and b each independently represent an integer of 0 to 4.
In general formula (II),
R 3 and R 4 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms.
The average number of repeats n indicates the total number of siloxane repeat units in the polyorganosiloxane block. )

本発明のポリカーボネート系樹脂組成物から得られる成形体は、透明性、表面硬度および靭性に優れている。
このため前記成形体は所望の色に着色することができ、使用中に傷つき難くなり、破壊されたときでも、破壊面には鋭利な部分が生じ難くなっている。
The molded product obtained from the polycarbonate-based resin composition of the present invention is excellent in transparency, surface hardness and toughness.
Therefore, the molded product can be colored in a desired color, is less likely to be damaged during use, and is less likely to have a sharp portion on the fractured surface even when it is destroyed.

<ポリカーボネート系樹脂組成物>
(A)成分のポリカーボネート系樹脂は、一般式(I)で表される繰り返し単位を含むポリカーボネートブロックと、一般式(II)で表される繰り返し単位を含むポリオルガノシロキサンブロックとを有するポリカーボネート-ポリオルガノシロキサン共重合体である。
<Polycarbonate resin composition>
The polycarbonate-based resin of the component (A) is a polycarbonate-poly having a polycarbonate block containing a repeating unit represented by the general formula (I) and a polyorganosiloxane block containing a repeating unit represented by the general formula (II). It is an organosiloxane copolymer.

Figure 0007075223000002
Figure 0007075223000002

(一般式(I)中、
1およびR2は、それぞれ独立にハロゲン原子、炭素数1~6のアルキル基または炭素数1~6のアルコキシ基を示し、
Xは単結合、炭素数1~8のアルキレン基、炭素数2~8のアルキリデン基、炭素数5~15のシクロアルキレン基、炭素数5~15のシクロアルキリデン基、フルオレンジイル基、炭素数7~15のアリールアルキレン基、炭素数7~15のアリールアルキリデン基、-S-、-SO-、-SO2-、-O-またはCO-を示し、
aおよびbは、それぞれ独立に0~4の整数を示す。
一般式(II)中、
3およびR4は、それぞれ独立に水素原子、ハロゲン原子、炭素数1~6のアルキル基、炭素数1~6のアルコキシ基または炭素数6~12のアリール基を示し、
平均繰り返し数nは、ポリオルガノシロキサンブロック中のシロキサン繰り返し単位の合計数を示す。)
(In general formula (I),
R 1 and R 2 independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, respectively.
X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorinyl group, and a carbon number of carbon atoms. Representing an arylalkylene group of 7 to 15, an arylalkylidene group of 7 to 15 carbon atoms, -S-, -SO-, -SO 2- , -O- or CO-,
a and b each independently represent an integer of 0 to 4.
In general formula (II),
R 3 and R 4 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms.
The average number of repeats n indicates the total number of siloxane repeat units in the polyorganosiloxane block. )

(A)成分は、粘度平均分子量が10,000~40,000であり、好ましくは10,000~30,000である。
一般式(I)で表される繰り返し単位を含むポリカーボネートブロックと一般式(II)で表される繰り返し単位を含むポリオルガノシロキサンブロックは、(A)成分が上記粘度範囲になるようにそれぞれの繰り返し単位数が調整される。
粘度平均分子量(Mv)は、ウベローデ型粘度計を用いて、20℃における塩化メチレン溶液の粘度を測定し、これより極限粘度[η]を求め、次式にて算出することができる(特開2008-202012号公報参照)。
[η]=1.23×10-5Mv0.83
The component (A) has a viscosity average molecular weight of 10,000 to 40,000, preferably 10,000 to 30,000.
The polycarbonate block containing the repeating unit represented by the general formula (I) and the polyorganosiloxane block containing the repeating unit represented by the general formula (II) are each repeated so that the component (A) is within the above viscosity range. The number of units is adjusted.
The viscosity average molecular weight (Mv) can be calculated by the following formula by measuring the viscosity of the methylene chloride solution at 20 ° C. using a Ubbelohde viscometer and obtaining the ultimate viscosity [η] from this. 2008-20 2012 issue).
[Η] = 1.23 × 10 -5 Mv 0.83

(A)成分のポリカーボネート-ポリオルガノシロキサン共重合体は、一分子中のSi量が1~10質量%の範囲であるものが好ましい。 The polycarbonate-polyorganosiloxane copolymer of the component (A) preferably has a Si content in one molecule in the range of 1 to 10% by mass.

(B)成分のメチルメタクリレート単位を含む重合体は、表面強度向上剤として作用するものであり、重量平均分子量5,000~30,000の重合体であり、好ましくは重量平均分子量10,000~25,000の重合体である。
重量平均分子量は、テトラヒドロフラン溶媒を用いたGPC測定により求めた標準ポリスチレン換算値とする。
The polymer containing the methyl methacrylate unit of the component (B) acts as a surface strength improving agent, and is a polymer having a weight average molecular weight of 5,000 to 30,000, preferably a polymer having a weight average molecular weight of 10,000 to 25,000. ..
The weight average molecular weight shall be a standard polystyrene-equivalent value obtained by GPC measurement using a tetrahydrofuran solvent.

(B)成分は、メチルメタクリレート単位を20質量%以上含有するものが好ましく、40質量%以上含有するものがより好ましく、60質量%以上含有するものがさらに好ましい。本発明では、前記割合は原料基準値と実測値のいずれも同じとする。 The component (B) preferably contains 20% by mass or more of a methyl methacrylate unit, more preferably 40% by mass or more, and further preferably 60% by mass or more. In the present invention, the ratio is the same for both the raw material reference value and the measured value.

(B)成分を共重合体にするときの共重合成分としては、
メチルアクリレート、エチルアクリレート、プロピルアクリレート、イソプロピルアクリレート、ブチルアクリレート、アミルアクリレート、ヘキシルアクリレート、オクチルアクリレート、2-エチルヘキシルアクリレート、シクロヘキシルアクリレート、ドデシルアクリレート、オクタデシルアクリレート、フェニルアクリレート、ベンジルアクリレートなどのアクリル酸エステル、
エチルメタクリレート、プロピルメタクリレート、イソプロピルメタクリレート、ブチルメタクリレート、アミルメタクリレート、ヘキシルメタクリレート、オクチルメタクリレート、2-エチルヘキシルメタクリレート、シクロヘキシルメタクリレート、ドデシルメタクリレート、オクタデシルメタクリレート、フェニルメタクリレート、ベンジルメタクリレートなどのメタクリル酸エステルが挙げられ、これらから選ばれる1または2以上を使用することができる。
これらの中でもフェニルメタクリレート、フェニルアクリレート、ベンジルメタクリレート、ベンジルアクリレートなどの芳香族(メタ)アクリレートが好ましい。
As a copolymerization component when the component (B) is made into a copolymer,
Acrylate esters such as methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, benzyl acrylate,
Examples thereof include methacrylic acid esters such as ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, amyl methacrylate, hexyl methacrylate, octyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, phenyl methacrylate and benzyl methacrylate. One or two or more selected from can be used.
Among these, aromatic (meth) acrylates such as phenyl methacrylate, phenyl acrylate, benzyl methacrylate and benzyl acrylate are preferable.

(B)成分は、メチルメタクリレート単位と芳香族(メタ)アクリレート単位を含む共重合体が好ましく、メチルメタクリレート単位の割合は、20~95質量%が好ましく、40~95質量%がより好ましく、60~95質量%がさらに好ましく、芳香族(メタ)アクリレート単位の割合は、5~80質量%が好ましく、5~60質量%がより好ましく、5~40質量%がさらに好ましい。 The component (B) is preferably a copolymer containing a methyl methacrylate unit and an aromatic (meth) acrylate unit, and the proportion of the methyl methacrylate unit is preferably 20 to 95% by mass, more preferably 40 to 95% by mass, and 60. The ratio of the aromatic (meth) acrylate unit is more preferably 5 to 80% by mass, more preferably 5 to 60% by mass, still more preferably 5 to 40% by mass.

(B)成分は、ガラス転移点(Tg)が90~120℃のものが好ましく、90~110℃のものがより好ましい。
ガラス転移点(Tg)は、示差走査熱量計(DSC)を用い、窒素気流下、昇温速度20℃/分の条件で測定した値を示す。
(B)成分は、特開2010-116501号公報の特許請求の範囲および実施例などにおいて表面硬度向上剤として記載されている共重合体を使用することができる。
The component (B) preferably has a glass transition point (Tg) of 90 to 120 ° C, more preferably 90 to 110 ° C.
The glass transition point (Tg) indicates a value measured by using a differential scanning calorimeter (DSC) under a nitrogen flow condition and a heating rate of 20 ° C./min.
As the component (B), a copolymer described as a surface hardness improving agent in the claims and examples of JP-A-2010-116501 can be used.

(A)成分と(B)成分の合計量100質量%中の割合は、
(A)成分50~95質量%であり、55~95質量%が好ましく、60~90質量%がより好ましく、
(B)成分5~50質量%であり、5~45質量%が好ましく、10~40質量%がより好ましい。
The ratio of the total amount of the component (A) and the component (B) to 100% by mass is
(A) The component is 50 to 95% by mass, preferably 55 to 95% by mass, more preferably 60 to 90% by mass.
(B) The component is 5 to 50% by mass, preferably 5 to 45% by mass, and more preferably 10 to 40% by mass.

本発明の組成物は、必要に応じて、特許文献1、2に記載の炭素数15~19の飽和アルコールと炭素数16~22の飽和脂肪酸からなるエステル化合物、特許文献1、2に記載のリン系安定剤などの安定剤を含有することができる。 The composition of the present invention is described in Patent Documents 1 and 2, if necessary, an ester compound composed of a saturated alcohol having 15 to 19 carbon atoms and a saturated fatty acid having 16 to 22 carbon atoms described in Patent Documents 1 and 2. It can contain a stabilizer such as a phosphorus-based stabilizer.

本発明の組成物は、用途に応じて、慣用の添加剤、例えば、他の安定化剤(例えば、酸化防止剤、紫外線吸収剤、耐光安定剤など)、着色剤(染料、顔料など)、帯電防止剤、難燃剤(リン系難燃剤、ハロゲン系難燃剤、無機系難燃剤など)、難燃助剤、架橋剤、核剤、カップリング剤、分散剤、消泡剤、流動化剤、ドリッピング防止剤、抗菌剤、防腐剤、粘度調整剤、増粘剤などを含んでいてもよいが、ガラス繊維は含まない。 The compositions of the present invention may contain conventional additives such as other stabilizers (eg, antioxidants, UV absorbers, light retardant stabilizers, etc.), colorants (dye, pigment, etc.), depending on the application. Antistatic agents, flame retardants (phosphorus flame retardants, halogen flame retardants, inorganic flame retardants, etc.), flame retardants, cross-linking agents, nucleating agents, coupling agents, dispersants, defoaming agents, fluidizing agents, It may contain anti-dripping agents, antibacterial agents, preservatives, viscosity modifiers, thickeners and the like, but does not contain glass fibers.

本発明の組成物は、例えば、各成分をタンブラーミキサー、ヘンシェルミキサー、リボンミキサー、ニーダーなどの混合機を用いて乾式または湿式で混合して調製してもよい。
さらに、前記混合機で予備混合した後、一軸または二軸押出機などの押出機で混練してペレットに調製する方法、加熱ロールやバンバリーミキサーなどの混練機で溶融混練して調製する方法を適用することができる。
The composition of the present invention may be prepared by mixing each component dry or wet using a mixer such as a tumbler mixer, a Henschel mixer, a ribbon mixer, or a kneader.
Further, a method of premixing with the mixer and then kneading with an extruder such as a single-screw or twin-screw extruder to prepare pellets, or a method of melting and kneading with a kneader such as a heating roll or a Banbury mixer is applied. can do.

<ポリカーボネート系樹脂組成物の成形体>
本発明の成形体は、上記したポリカーボネート系樹脂組成物を使用して、射出成形、押出成形、真空成形、異型成形、発泡成形、インジェクションプレス、プレス成形、ブロー成形、ガス注入成形などによって、用途に応じた所望形状の成形体にすることができる。
<Molded product of polycarbonate resin composition>
The molded product of the present invention is used for injection molding, extrusion molding, vacuum molding, profile molding, foam molding, injection press, press molding, blow molding, gas injection molding and the like using the above-mentioned polycarbonate resin composition. It is possible to obtain a molded product having a desired shape according to the above conditions.

本発明の成形体は、全光線透過率(ASTMD1003-00,厚み3mm)が70%以上であるものが好ましく、80%以上であるものがより好ましい。
本発明の成形体は透明度が高く、ポリカーボネート系樹脂組成物に着色剤を含有させることで所望の色(例えば、漆黒、メタリック)に着色することができるため、製品(成形体)の意匠性や美観を向上させることができる。
The molded product of the present invention preferably has a total light transmittance (ASTMD1003-00, thickness 3 mm) of 70% or more, and more preferably 80% or more.
The molded product of the present invention has high transparency and can be colored in a desired color (for example, jet black, metallic) by containing a colorant in the polycarbonate resin composition, so that the design of the product (molded product) can be improved. It can improve the aesthetics.

本発明の成形体は、鉛筆硬度(JIS K5400)がB以上であるものが好ましい。
鉛筆硬度が高いことから傷つき難くなっており、自動車の内装部品などに使用したときには、傷つき難く、美観を維持することができる。
The molded product of the present invention preferably has a pencil hardness (JIS K5400) of B or higher.
Due to the high hardness of the pencil, it is hard to be scratched, and when it is used for interior parts of automobiles, it is hard to be scratched and the appearance can be maintained.

本発明の成形体は、引張り呼び歪(ISO527)が10%以上であるものが好ましい。
引張り呼び歪(ISO527)が10%以上であると、成形体が破損または破壊したときでも鋭利な部分が生じ難くなり、安全性が高くなる。
The molded product of the present invention preferably has a tensile nominal strain (ISO527) of 10% or more.
When the tensile nominal strain (ISO527) is 10% or more, sharp portions are less likely to be generated even when the molded product is damaged or broken, and safety is improved.

<各特性の評価方法>
[透明性]
射出成形法により作製した厚さ3mmの平板につき、ASTMD1003-00に準拠し、全光線透過率(%)、ヘーズ(%)を測定して評価した。
<Evaluation method for each characteristic>
[transparency]
A flat plate having a thickness of 3 mm produced by an injection molding method was evaluated by measuring the total light transmittance (%) and haze (%) in accordance with ASTMD1003-0.

[鉛筆硬度]
JIS K5400に準拠した方法で、射出成形法により、作製した厚さ3mmの平板表面を測定し、評価した。
[Pencil hardness]
The surface of a flat plate having a thickness of 3 mm produced by an injection molding method was measured and evaluated by a method according to JIS K5400.

[引張り呼び歪]
ISO527に準拠した方法で、引張り呼び歪(%)を測定し、評価した。
[Tension nominal strain]
The tensile nominal strain (%) was measured and evaluated by a method according to ISO527.

<使用成分>
(A)成分
ポリカーボネート中にシロキサン分子を共重合したシロキサンポリカーボネートコポリマー(出光興産株式会社製,タフロン ネオ RC1760)(粘度平均分子量17000,Si量約6質量%)
(B)成分
メタクリル酸アリール・メタクリル酸アルキル・アクリル酸アルキル共重合体(三菱レイヨン株式会社製,メタブレン H-880)
(C)成分
ホスファイト系酸化防止剤(BASFジャパン株式会社製 IRGAFOS168)
<Ingredients used>
(A) Ingredient
Siloxane Polycarbonate Copolymer (manufactured by Idemitsu Kosan Co., Ltd., Tafflon) in which siloxane molecules are copolymerized in polycarbonate Neo RC1760) (Viscosity average molecular weight 17000, Si amount about 6% by mass)
(B) Ingredient
Aryl methacrylate / alkyl methacrylate / alkyl acrylate copolymer (manufactured by Mitsubishi Rayon Co., Ltd., Metabrene H-880)
(C) Ingredient
Phosphite-based antioxidant (IRGAFOS168 manufactured by BASF Japan Ltd.)

実施例および比較例
表1に示す配合(質量%、質量部)で各成分を配合し、ヘンシェルミキサーで混合した。
その後、前記混合物を押出機に供給して250℃で溶融混練し、ペレットを得た。
このペレットを250℃で射出成形して各試験片を作製し、各測定を実施した。結果を表1に示す。
Examples and Comparative Examples Each component was blended in the formulations shown in Table 1 (% by mass, parts by mass) and mixed with a Henschel mixer.
Then, the mixture was supplied to an extruder and melt-kneaded at 250 ° C. to obtain pellets.
These pellets were injection molded at 250 ° C. to prepare each test piece, and each measurement was carried out. The results are shown in Table 1.

(射出成形条件)
成形機:三菱重工(株)社製 100MS-II(型締力100t)、シリンダー径36mm
成形温度:250℃、金型温度:60℃
(Injection molding conditions)
Molding machine: Mitsubishi Heavy Industries, Ltd. 100MS-II (mold clamping force 100t), cylinder diameter 36mm
Molding temperature: 250 ° C, mold temperature: 60 ° C

Figure 0007075223000003
Figure 0007075223000003

比較例1、2は、(A)成分と(B)成分の含有割合を満たしていないため、表面硬度と伸び(引張呼び歪み)のいずれかが劣っていた。 In Comparative Examples 1 and 2, since the content ratios of the component (A) and the component (B) were not satisfied, either the surface hardness or the elongation (tensile nominal strain) was inferior.

本発明のポリカーボネート系樹脂組成物から得られる成形体は、例えば、OA・家電機器分野、電気・電子分野、通信機器分野、サニタリー分野、自動車などの輸送車両分野、家具・建材などの住宅関連分野、雑貨分野などの各パーツ、ハウジングなどに使用することができる。 The molded body obtained from the polycarbonate-based resin composition of the present invention is, for example, an OA / home appliance field, an electric / electronic field, a communication equipment field, a sanitary field, a transportation vehicle field such as an automobile, and a housing-related field such as furniture / building materials. , Can be used for various parts such as miscellaneous goods, housing, etc.

Claims (5)

(A)ポリカーボネート系樹脂と(B)重量平均分子量5,000~30,000のメチルメタクリレート単位を含む重合体を含有しており、
(A)成分のポリカーボネート系樹脂が、下記一般式(I)で表される繰り返し単位を含むポリカーボネートブロックと、下記一般式(II)で表される繰り返し単位を含むポリオルガノシロキサンブロックとを有する、一分子中のSi量が1~10質量%の範囲であり、粘度平均分子量が10,000~40,000であるポリカーボネート-ポリオルガノシロキサン共重合体であり、
(B)成分が、メチルメタクリレート単位60~95質量%および芳香族(メタ)アクリレート単位5~40質量%であるメチルメタクリレート単位を含む共重合体であり、
(A)成分と(B)成分の合計量中の(A)成分の含有割合が60~90質量%、(B)成分の含有割合が10~40質量%である、ポリカーボネート系樹脂組成物であって、
前記ポリカーボネート系樹脂組成物から得られる成形体の全光線透過率(ASTMD1003-00)が89%以上であり、ヘーズ(ASTMD1003-00)が1%~2%である、ポリカーボネート系樹脂組成物。
Figure 0007075223000004

(一般式(I)中、
1およびR2は、それぞれ独立にハロゲン原子、炭素数1~6のアルキル基または炭素数1~6のアルコキシ基を示し、
Xは単結合、炭素数1~8のアルキレン基、炭素数2~8のアルキリデン基、炭素数5~15のシクロアルキレン基、炭素数5~15のシクロアルキリデン基、フルオレンジイル基、炭素数7~15のアリールアルキレン基、炭素数7~15のアリールアルキリデン基、-S-、-SO-、-SO2-、-O-またはCO-を示し、
aおよびbは、それぞれ独立に0~4の整数を示す。
一般式(II)中、
3およびR4は、それぞれ独立に水素原子、ハロゲン原子、炭素数1~6のアルキル基、炭素数1~6のアルコキシ基または炭素数6~12のアリール基を示し、
平均繰り返し数nは、ポリオルガノシロキサンブロック中のシロキサン繰り返し単位の合計数を示す。)
It contains (A) a polycarbonate-based resin and (B) a polymer containing a methyl methacrylate unit having a weight average molecular weight of 5,000 to 30,000.
The polycarbonate-based resin of the component (A) has a polycarbonate block containing a repeating unit represented by the following general formula (I) and a polyorganosiloxane block containing a repeating unit represented by the following general formula (II). It is a polycarbonate-polyorganosiloxane copolymer having a Si content in one molecule in the range of 1 to 10% by mass and a viscosity average molecular weight of 10,000 to 40,000.
(B) is a copolymer containing a methyl methacrylate unit having a methyl methacrylate unit of 60 to 95% by mass and an aromatic (meth) acrylate unit of 5 to 40% by mass.
A polycarbonate resin composition in which the content ratio of the component (A) in the total amount of the component (A) and the component (B) is 60 to 90% by mass, and the content ratio of the component (B) is 10 to 40 % by mass. There,
A polycarbonate-based resin composition having a total light transmittance (ASTMD1003-00) of 89% or more and a haze (ASTMD1003-00) of 1% to 2% of a molded product obtained from the polycarbonate-based resin composition.
Figure 0007075223000004

(In general formula (I),
R 1 and R 2 independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, respectively.
X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorinyl group, and a carbon number of carbon atoms. Representing an arylalkylene group of 7 to 15, an arylalkylidene group of 7 to 15 carbon atoms, -S-, -SO-, -SO 2- , -O- or CO-,
a and b each independently represent an integer of 0 to 4.
In general formula (II),
R 3 and R 4 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms.
The average number of repeats n indicates the total number of siloxane repeat units in the polyorganosiloxane block. )
前記ポリカーボネート系樹脂組成物から得られる成形体の鉛筆硬度(JIS K5400)がB以上である請求項1記載のポリカーボネート系樹脂組成物。 The polycarbonate-based resin composition according to claim 1 , wherein the pencil hardness (JIS K5400) of the molded product obtained from the polycarbonate-based resin composition is B or more. 前記ポリカーボネート系樹脂組成物から得られる成形体の引張り呼び歪(ISO527)が10%以上である請求項1記載のポリカーボネート系樹脂組成物。 The polycarbonate-based resin composition according to claim 1 , wherein the tensile nominal strain (ISO527) of the molded product obtained from the polycarbonate-based resin composition is 10% or more. 請求項1~のいずれか1項に記載のポリカーボネート系樹脂組成物からなる成形体。 A molded product made of the polycarbonate-based resin composition according to any one of claims 1 to 3 . 所望の色に着色されたものである、請求項4記載の成形体。The molded product according to claim 4, which is colored in a desired color.
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