WO2010150608A1 - 熱可塑性樹脂組成物、及びその成形体 - Google Patents
熱可塑性樹脂組成物、及びその成形体 Download PDFInfo
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- WO2010150608A1 WO2010150608A1 PCT/JP2010/058704 JP2010058704W WO2010150608A1 WO 2010150608 A1 WO2010150608 A1 WO 2010150608A1 JP 2010058704 W JP2010058704 W JP 2010058704W WO 2010150608 A1 WO2010150608 A1 WO 2010150608A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/128—Polymer particles coated by inorganic and non-macromolecular organic compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
Definitions
- the present invention relates to a thermoplastic resin composition capable of improving the strength and surface gloss of a molded product, and the molded product.
- Patent Documents 1 and 2 the specific viscosity ( ⁇ sp) determined by measuring a 0.2 g / 100 ml acetone solution of a core-shell polymer composition soluble in methanol and insoluble in methanol at 30 ° C. is 0.19.
- a graft copolymer having a polymer chain having a high molecular weight as a graft component and a shell part as an accompanying free polymer has been disclosed, but the weather resistance, impact resistance, and secondary processability are improved. However, it does not touch on the effect of improving the gloss of the molded product, and is not sufficient as a method for increasing both gloss and impact resistance.
- the vinyl chloride resin composition for the building materials field contains fillers such as calcium carbonate. Although it is possible to improve the surface gloss to some extent by reducing this amount, the cost increases. This is not preferable. Although the surface gloss is improved by raising the molding temperature, there are many problems such as thermal decomposition of vinyl chloride. In addition, gloss can be improved by using a copolymer containing methyl methacrylate as a main component as a processing aid, but there is also a problem that torque increases due to an increase in melt viscosity and impact resistance also decreases. .
- the present invention provides a thermoplastic resin composition comprising 100 parts by weight of the thermoplastic resin (a) and 0.5-30 parts by weight of the core-shell polymer composition (b), wherein the core-shell polymer composition (b ) Is obtained by polymerizing the shell component in the presence of the core obtained by polymerizing the core component, and the core component is an alkyl acrylate having an alkyl group having 2 to 18 carbon atoms.
- a monomer mixture comprising 95% by weight, 0.05 to 10% by weight of a polyfunctional monomer, and 0 to 20% by weight of monomers copolymerizable therewith, consisting of a total of 100% by weight, and 100 to 100% by weight of the polyfunctional monomer is 51 to 100% by weight of a compound having a plurality of identical radical polymerizable functional groups in the molecule, and compounds 0 to 49 having a plurality of radical polymerizable functional groups different from each other in the molecule. This consists of% by weight And wherein, it relates to a thermoplastic resin composition.
- thermoplastic resin composition is such that the compound having a plurality of radically polymerizable functional groups different from each other in the molecule has an allyl group.
- the molecular weight of the component soluble in methyl ethyl ketone and insoluble in methanol of the core-shell polymer composition (b) is 500,000 or more, and the component amount is in the core-shell polymer composition (b).
- the thermoplastic resin composition is characterized by being 5 to 20%.
- thermoplastic resin wherein the total amount of the core-shell polymer composition (b) is 100% by weight, the core component is 50 to 95% by weight, and the shell component is 5 to 50% by weight. It is to make a composition.
- the content rate of a core structural component and a shell structural component can be equated with the content rate of the core polymer in a core shell polymer polymer, and a shell polymer.
- the present invention also relates to a molded body obtained by molding the thermoplastic resin composition of the present invention.
- a preferred embodiment is that the molded body is siding.
- additives such as antioxidants, stabilizers, ultraviolet absorbers, pigments, antistatic agents, lubricants, processing aids, and the like may be added as appropriate to the thermoplastic resin composition of the present invention. it can.
- Such a molded body formed using the thermoplastic resin composition of the present invention as a material can be suitably used for window frames, door frames, or siding.
- the stabilizer described above is preferably one or more selected from lead compounds, organic tins, and metal soaps, but from the viewpoint of health and environmental conservation, organic tins and metal soaps are preferred. Of these, a Ca—Zn system is preferable among the metal soap systems.
- thermoplastic resin (a) is preferably a vinyl chloride resin, a (meth) acrylic resin, a styrene resin, a carbonate resin, an amide resin, an ester resin, an olefin resin, or the like.
- Such a core-shell polymer composition (b) can be produced by, for example, an emulsion polymerization method, a suspension polymerization method, a microsuspension polymerization method, a miniemulsion polymerization method, an aqueous dispersion polymerization method, etc. From the viewpoint of easy control, those produced by an emulsion polymerization method can be suitably used.
- the latex and particles of the core-shell polymer thus obtained are subjected to coagulation treatment such as salting out and acid precipitation as necessary, and then subjected to heat treatment, washing, dehydration, and drying steps to form a powder.
- coagulation treatment such as salting out and acid precipitation as necessary
- heat treatment washing, dehydration, and drying steps to form a powder.
- the method for recovering the powder is not limited to the above, and for example, the powder can also be recovered by spray-drying the core-shell polymer latex.
- Such a core according to the present invention comprises, as a core component, 70 to 99.95% by weight of an alkyl acrylate having an alkyl group having 2 to 18 carbon atoms, 0.05 to 10% by weight of a polyfunctional monomer, And 0 to 20% by weight of a monomer copolymerizable therewith, and a monomer mixture comprising 100% by weight in total, and the present invention provides 100% by weight of the polyfunctional monomer, It is characterized by comprising 51 to 100% by weight of a compound having a plurality of identical radical polymerizable functional groups in the molecule and 0 to 49% by weight of a compound having a plurality of different radical polymerizable functional groups in the molecule.
- the content of the alkyl acrylate having an alkyl group having 2 to 18 carbon atoms within the above range, a high impact resistance improvement effect can be obtained.
- the content of the polyfunctional monomer within the above range, the degree of cross-linking of the core polymer, the amount of so-called free polymer components generated during the process of grafting the shell onto the core, and the molecular weight thereof are in the optimal range. Therefore, it is possible to obtain a molded body having further excellent strength, gloss, and surface properties.
- the content of the copolymerizable monomer within the above range, for example, workability (ease of molding) when using a vinyl chloride resin as the thermoplastic resin (a), etc. The characteristics of can be improved.
- the alkyl acrylate content is preferably 97 to 99.5% by weight.
- the content of the polyfunctional monomer is preferably 0.5 to 5.0% by weight, and more preferably 1.0 to 4.0% by weight.
- the upper limit of the monomer content is preferably 1.0% by weight.
- a compound having a plurality of the same radical polymerizable functional groups in the molecule and a compound having a plurality of radical polymerizable functional groups different from each other in the molecule may be composed of a single kind or a combination of two or more kinds. It may be configured.
- a polyfunctional monomer when a compound having a plurality of the same radical polymerizable functional groups in the molecule and a compound having a plurality of different radical polymerizable functional groups in the molecule are used in combination, the same in the molecule It is preferable to use 80 to 99% by weight of a compound having a plurality of radically polymerizable functional groups and 1 to 20% by weight of a compound having a plurality of radically polymerizable functional groups different from each other in the molecule. More preferably, the compound has 90 to 99% by weight of the compound having a plurality of groups, and 1 to 10% by weight of the compound having a plurality of radically polymerizable functional groups different from each other in the molecule.
- the above “radical polymerizable functional group” means a functional group composed of an ethylenic double bond and an atom adjacent thereto.
- the radical polymer functional group is “same” means that the group is the same, and the radical polymer functional group “Different” means that the group is different.
- the shell component When the shell component is polymerized in the presence of the core obtained by polymerizing the polyfunctional monomer according to the present invention as a core component, the mechanism is not clear, but the shell component has a high molecular weight. There is a tendency to become a polymer, and such a high molecular weight polymer is not grafted to the core, and the so-called free core-shell polymer composition (b) according to the present invention is used as a high molecular weight polymer alone. It is considered that high surface gloss, which is an effect of the present invention, can be obtained due to the tendency to be contained as a polymer.
- the present invention is an optional component and a subcomponent of the polyfunctional monomer according to the present invention.
- a compound having a plurality of radically polymerizable functional groups different from each other in the molecule is preferably used as the polyfunctional monomer according to the present invention.
- the surface gloss of the molded body is improved by increasing the molecular weight of the shell constituent polymer
- the melting when the thermoplastic resin composition is melted in the molding machine by increasing the molecular weight of the shell constituent polymer increases, and the smoothness of the molded body surface may be lost. Therefore, a compound having a plurality of radically polymerizable functional groups different from each other in the molecule so that the molecular weight of the shell constituent polymer is adjusted to a molecular weight range in which the surface property of the molded article is not impaired and the surface gloss is good. It is thought that it becomes a preferable result to use together.
- the linking group (main chain) of the compound having a plurality of the same radical polymerizable functional groups in the molecule is mainly composed of a repeating structure of alkylene glycol units, and the number average value of the number of repeating units of the repeating structure is 3 Or more, preferably 30 or less, more preferably 3 or more and 12 or less, further preferably 3 or more and 7 or less, still more preferably 3 or more and 5 or less, and more preferably 3. Most preferred.
- the linking group is preferably 50% or more, more preferably 75% of the units containing prorylene glycol units, tetramethylene glycol units, isobutylene glycol units, neopentyl glycol units, and the like. That is all.
- the same radically polymerizable functional group one selected from the group consisting of a (meth) acrylate group and an allyl group is preferable, and more preferably, the effect of the present invention is sufficiently exhibited. It is a (meth) acrylate group, and more preferably an acrylate group.
- the polyfunctional monomer has the same functional group as the radical polymerizable functional group (acrylate group) of the main component of the core component (alkyl acrylate having an alkyl group having 2 to 18 carbon atoms). It is presumed that the polymerizable monomer is easily polymerized with the main component, and it is difficult to form a graft point where the shell is grafted.
- the combination of the radical polymerizable functional groups different from each other is preferably a combination of a (meth) acrylate group and an allyl group, more preferably a combination of an acrylate group and an allyl group.
- the polyfunctional monomer has a functional group (allyl group) different from the radical polymerizable functional group (acrylate group) of the main component of the core component (alkyl acrylate having an alkyl group having 2 to 18 carbon atoms). It is presumed that, when the core component is polymerized, the functional group (allyl group) does not polymerize with the main component, and the graft point where the shell is grafted easily remains.
- (meth) acrylate means acrylate and / or methacrylate.
- the weight average molecular weight of the free polymer according to the present invention is required to be 500,000 or more in order to express the gloss of a good molded article, preferably 600 to 1,200,000, more preferably 700 to 1,200,000,
- This free polymer is a component that is soluble in methyl ethyl ketone and insoluble in methanol of the core-shell polymer composition (b) according to the present invention. That is, the core-shell weight according to the present invention is determined by the polystyrene-reduced weight average molecular weight by gel permeation chromatography (GPC) of the free polymer according to the present invention obtained by the method described in “Measurement of free polymer molecular weight” described later. It is clear that the molecular weight of the graft component of the combined composition (b) can also be evaluated.
- GPC gel permeation chromatography
- the content of the free polymer is preferably 5 to 20%, more preferably 7 to 16%, and more preferably 8 to 15% in the core-shell polymer composition (b). 8 to 12% is particularly preferable.
- the shell constituent component according to the present invention includes 50 to 100% by weight of methyl methacrylate, 0 to 50% by weight of alkyl acrylate having an alkyl group having 2 to 18 carbon atoms, and these It is preferable that the total amount is 100% by weight, with 0 to 20% by weight of the monomers copolymerizable therewith.
- alkyl methacrylates having an alkyl group examples include methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate, dodecyl methacrylate, stearyl methacrylate, and behenyl methacrylate.
- vinyl arenes examples include styrene, ⁇ -methyl styrene, monochloro styrene, dichloro styrene and the like.
- an emulsified liquid monomer comprising 10 g of butyl acrylate (hereinafter referred to as BA), 10 g of styrene (hereinafter referred to as St), 4 g of a 10% by weight sodium lauryl sulfate aqueous solution, and 60 g of deionized water.
- BA butyl acrylate
- St styrene
- St styrene
- MMA methyl methacrylate
- BA methyl methacrylate
- thermoplastic resin composition C-1 100 parts by weight of vinyl chloride resin (Kanevinyl S-1001, manufactured by Kaneka Corp.), 1.5 parts by weight of methyl tin mercapto stabilizer (TM-181FSJ, manufactured by Katsuta Chemical Co., Ltd.) Paraffin wax (Rheolub165, manufactured by Rheochem) 1.0 part by weight, calcium stearate (SC-100, manufactured by Sakai Chemical Co., Ltd.) 1.2 parts by weight, polyethylene oxide wax (ACPE-629A, Allied Signal Co., Ltd.) 0.1 parts by weight, calcium carbonate (Hydrocarb 95T, manufactured by Omya Co., Ltd.) 5.0 parts by weight, titanium oxide (TITON R-62N, manufactured by Sakai Chemical Co., Ltd.), 10 parts by weight, processing aid (Kaneace PA) -20, manufactured by Kaneka Corporation) 1.5 parts by weight and 5.0 parts by weight of white shell powder B of the core-shell polymer composition A-1
- thermoplastic resin composition C-1 obtained above was subjected to molding temperature conditions C1 / C2 / C3 / C4 / AD / D1 / D2 / D3 using a 65 mm different-direction parallel twin-screw extruder (manufactured by Battenfeld).
- the obtained free polymer was taken out by filtration and its weight was measured, and it was 0.2 g (content in the core-shell polymer composition: 10% by weight).
- a free polymer tetrahydrofuran solution in which about 20 mg thereof was dissolved in 10 ml of tetrahydrofuran was prepared using HLC-8220GPC (manufactured by Tosoh Corporation) as a precipitate (a component soluble in methyl ethyl ketone and insoluble in methanol). The weight average molecular weight was measured.
- thermoplastic resin composition C-2 was obtained in the same manner as in Example 1 except that 5.0 parts by weight of the white resin powder B-2 of the core-shell polymer composition A-2 was used.
- Table 1 shows the structure of the core-shell polymer composition obtained in Example 1 and Comparative Example 1, and the evaluation results of the molded product obtained by blending it with the thermoplastic resin, that is, measurement of surface gloss and Gardner strength. Results are shown.
- B-3 of core-shell polymer composition A-3 B-3 was obtained as a core-shell polymer composition A-3 of white resin powder in the same manner as in Example 1 except that the latex of the core-shell polymer composition A-3 was used.
- thermoplastic resin composition C-3 Using the obtained thermoplastic resin composition C-3, a window frame molded article was prepared in the same manner as in Example 1, and the surface gloss was evaluated in the same manner as in Example 1.
- thermoplastic resin composition C-3 (Measurement of free polymer molecular weight) Using the thermoplastic resin composition C-3, the weight average molecular weight of a component soluble in methyl ethyl ketone and insoluble in methanol was measured in the same manner as in Example 1.
- Example 3 Preparation of core-shell polymer composition A-4
- a core-shell polymer was prepared in the same manner as in Example 1 except that 11.0 g of PTMG (3) DA and 0.8 g of allyl methacrylate (hereinafter referred to as AMA) were used instead of 26.6 g of PPG (12) DA.
- Composition A-4 was made.
- the volume average particle size of the acrylate polymer serving as the core was 0.20 ⁇ m, and the polymerization conversion rate of the monomer component forming the acrylate polymer was 99.6%.
- a latex of the core-shell polymer composition A-4 comprising 75% by weight of the core component and 25% by weight of the shell component was obtained.
- the polymerization conversion rate of the total monomer components after completion of the polymerization was 99.9%.
- thermoplastic resin composition C-4 Using the obtained thermoplastic resin composition C-4, a window frame molded article was prepared in the same manner as in Example 1, and the surface gloss was evaluated in the same manner as in Example 1.
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Abstract
Description
本発明の熱可塑性樹脂組成物は、熱可塑性樹脂(a)100重量部、及びコアシェル重合体組成物(b)0.5~30重量部を含む熱可塑性樹脂組成物である。前記コアシェル重合体組成物(b)の含有量は、品質面、およびコスト面から0.5~30重量部であることを要するが、好ましくは0.5~20重量部、より好ましくは0.5~10重量部である。前記含有量が30重量部を超える場合には、耐衝撃性の改良効果は充分であるが、それ以外の品質、例えば成形加工性の低下や、コストが上昇する場合がある。
塩化ビニル樹脂は一般に、加工時あるいは使用時の熱や紫外線、酸素などによる脱塩化水素反応による劣化(変色、および機械的・電気的特性の低下)を防ぐ目的から、安定剤を添加して使用されている。このような安定剤は主に、鉛化合物系安定剤、金属石鹸系安定剤、有機錫系安定剤などに分類されるが、なかでも熱安定性や電気絶縁性に優れ、かつ安価な鉛化合物系安定剤が多く使用されている。ところが、近年、建材や住宅資材など、製品に人間が触れるような用途においては、健康や環境保全の目的から、鉛化合物系安定剤の使用を控える動きが見られるようになってきており、その代替安定剤として、金属石鹸系安定剤のうち、特に無毒性のCa-Zn系安定剤が使用されるようになってきている。従い、上述した安定剤としては、鉛化合物系、有機錫系、金属石鹸系から選ばれる1種以上が好ましいが、健康や環境保全の観点からは、有機錫系、金属石鹸系が好ましく、特に好ましくは金属石鹸系のなかでもCa-Zn系が好ましい。
本発明に係る熱可塑性樹脂(a)は、好ましくは、塩化ビニル系樹脂、(メタ)アクリル系樹脂、スチレン系樹脂、カーボネート系樹脂、アミド系樹脂、エステル系樹脂、オレフィン系樹脂等である。
本発明に係るコアシェル重合体組成物(b)は、コア構成成分を重合して得られるコアの存在下に、シェル構成成分を重合して得られる。コア構成成分とシェル構成成分との比率は、良好な耐衝撃性、かつ、良好な表面光沢を得る観点から、コアシェル重合体組成物(b)全体量を100重量%として、コア構成成分50~95重量%、シェル構成成分5~50重量%が好ましく、コア構成成分60~90重量%、シェル構成成分10~40重量%がより好ましく、コア構成成分70~85重量%、シェル構成成分15~30重量%が特に好ましい。
本発明に係るコアシェル重合体組成物(b)のコアは、その粒子径が、特に熱可塑性樹脂(a)として塩化ビニル系樹脂を用いたときに良好な耐衝撃性を発現するために、0.05~0.3μmであることが好ましい。
本発明に係る前記フリーポリマーの重量平均分子量は、良好な成形体の光沢を発現するために、50万以上であることを要し、60~120万が好ましく、70~120万がより好ましく、このフリーポリマーは、本発明に係るコアシェル重合体組成物(b)のメチルエチルケトンに可溶かつメタノールに不溶な成分である。即ち、後述する「フリーポリマー分子量の測定」に記載の方法によって得られる、本発明に係るフリーポリマーのゲル・パーミエーション・クロマトグラフィー(GPC)によるポリスチレン換算重量平均分子量によって、本発明に係るコアシェル重合体組成物(b)のグラフト成分の分子量も評価できることは明らかである。
本発明に係るシェル構成成分は、良好な成形体の表面光沢を得る観点から、メチルメタクリレート50~100重量%、炭素数が2~18のアルキル基を有するアルキルアクリレート0~50重量%、及びこれらと共重合可能な単量体0~20重量%、合計100重量%からなることが好ましい。
上述したコア構成成分、又は、シェル構成成分である炭素数が2~18のアルキル基を有するアルキルアクリレートとしては、例えば、エチルアクリレート、プロピルアクリレート、ブチルアクリレート、2-エチルヘキシルアクリレート、4-ヒドロキシブチルアクリレート、オクチルアクリレート、ドデシルアクリレート、ステアリルアクリレート等が代表的なものとして例示される。
上述したコア構成成分、又は、シェル構成成分であるこれらと共重合可能な単量体としては、アルキル基を有するアルキルメタクリレート、ヒドロキシ基、又はアルコキシ基を有するアルキルメタクリレート類、ビニルアレーン類、ビニルカルボン酸類、ビニルシアン類、ハロゲン化ビニル類、酢酸ビニル、アルケン類からなる群から選ばれる1種以上であることが好ましい。
(コアシェル重合体組成物A-1の作製)
温度計、攪拌機、還流冷却器、窒素流入口、単量体と乳化剤の添加装置を有するガラス反応器に、脱イオン水2500g、1.0重量%濃度のラウリル硫酸ナトリウム水溶液60gを仕込み、窒素気流中で攪拌しながら50℃に昇温した。
コアシェル重合体組成物(A-1)のラテックスを、2重量%濃度の塩化カルシウム水溶液6000gに添加し、凝固ラテックス粒子を含むスラリーを得た。その後、その凝固ラテックス粒子スラリーを95℃まで昇温し、脱水、乾燥させることにより、白色樹脂粉末のコアシェル重合体組成物A-1としてB―1を得た。
塩化ビニル樹脂(カネビニルS-1001、(株)カネカ製)100重量部、有機錫系安定剤であるメチル錫メルカプト系安定剤(TM-181FSJ、(株)勝田化工製)1.5重量部、パラフィンワックス(Rheolub165、(株)Rheochem製)1.0重量部、ステアリン酸カルシウム(SC-100、(株)堺化学製)1.2重量部、酸化ポリエチレンワックス(ACPE-629A、(株)アライドシグナル製)0.1重量部、炭酸カルシウム(Hydrocarb95T、(株)Omya製)5.0重量部、酸化チタン(TITON R-62N、(株)堺化学製)10重量部、加工助剤(カネエースPA-20、(株)カネカ製)1.5重量部、及び5.0重量部のコアシェル重合体組成物A-1の白色樹脂粉末B-1をヘンシェルミキサーにてブレンドして熱可塑性樹脂組成物C-1を得た。
上記で得られた熱可塑性樹脂組成物C-1を、65mm異方向パラレル二軸押出機(Battenfeld社製)を用いて、成形温度条件C1/C2/C3/C4/AD/D1/D2/D3/D4=195℃/195℃/193℃/190℃/190℃/200℃/200℃/200℃/200℃(C1~C4はシリンダー温度、ADはアダプター温度、D1~D4はダイス温度)、スクリュー回転数20rpm、フィーダー回転数95rpm、吐出量100kg/hrの条件にて、窓枠成形した。
上記で得られた白色樹脂粉末B-1、2gをフリーポリマーの抽出溶媒であるメチルエチルケトン約100gに膨潤させ、遠心分離を実施した。遠心分離後、不溶沈殿物を取り除いた上澄みを約10gになるまで濃縮したメチルエチルケトン溶液をメタノール200ml中に添加し、少量の塩化カルシウム水溶液を加え攪拌した後、メタノール不溶の成分として結晶化した析出物であるフリーポリマーを回収した。得られたフリーポリマーを濾過することで取り出し、その重量を測定したところ、0.2g(コアシェル重合体組成物中の含有率:10重量%)であった。また、その約20mgをテトラハイドロフラン10mlに溶解したフリーポリマーのテトラハイドロフラン溶液を、HLC-8220GPC(東ソー(株)製)を用いて析出物(メチルエチルケトンに可溶かつメタノールに不溶な成分)の重量平均分子量を測定した。カラムはポリスチレンゲルカラムTSKgel SuperHZM-H(東ソー(株)製)を用い、テトラハイドロフランを溶出液とし、ポリスチレン換算で解析した。
(コアシェル重合体組成物A-2の作製)
PPG(12)DA26.6gの代わりに、アリルメタクリレート(以下、AMAとする)4.0gを使用した以外は、実施例1と同様の方法にて、コアシェル重合体組成物A-2を作製した。なお、コアとなるアクリレート系重合体の体積平均粒子径は、0.20μmであり、アクリレート系重合体を形成する単量体成分の重合転化率は99.8%であった。上記により、コア成分75重量%、シェル成分25重量%からなるコアシェル重合体組成物A-2のラテックスを得た。なお、重合完結後の総単量体成分の重合転化率は99.7%であった。
コアシェル重合体組成物A-2のラテックスを使用した以外は、実施例1と同様の方法にて、白色樹脂粉末のコアシェル重合体組成物A-2としてB-2を得た。
5.0重量部のコアシェル重合体組成物A-2の白色樹脂粉末B-2を使用した以外は、実施例1と同様の方法にて、熱可塑性樹脂組成物C-2を得た。
得られた熱可塑性樹脂組成物C-2を用い、実施例1と同様の方法にて窓枠成形体を調製し、また実施例1と同様の方法にて表面光沢、及びガードナー強度の評価を行なった。
上記の熱可塑性樹脂組成物C-2を用い、実施例1と同様の方法にて、メチルエチルケトンに可溶かつメタノールに不溶な成分の重量平均分子量を測定した。
(コアシェル重合体組成物A-3の作製)
PPG(12)DA26.6gの代わりに、繰返し単位数の平均が3であるテトラメチレングリコール鎖を主鎖とするポリテトラメチレングリコールジアクリレート(以下、PTMG(3)DAとする)11.0gを使用した以外は、実施例1と同様の方法にて、コアシェル重合体組成物A-3を作製した。なお、コアとなるアクリレート系重合体の体積平均粒子径は、0.20μmであり、アクリレート系重合体を形成する単量体成分の重合転化率は99.6%であった。上記により、コア成分75重量%、シェル成分25重量%からなるコアシェル重合体組成物A-3のラテックスを得た。なお、重合完結後の総単量体成分の重合転化率は99.9%であった。
コアシェル重合体組成物A-3のラテックスを使用した以外は、実施例1と同様の方法にて、白色樹脂粉末のコアシェル重合体組成物A-3としてB-3を得た。
5.0重量部のコアシェル重合体組成物A-3の白色樹脂粉末B-3を使用した以外は、実施例1と同様の方法にて、熱可塑性樹脂組成物C-3を得た。
得られた熱可塑性樹脂組成物C-3を用い、実施例1と同様の方法にて窓枠成形体を調製し、また実施例1と同様の方法にて表面光沢の評価を行なった。
上記の熱可塑性樹脂組成物C-3を用い、実施例1と同様の方法にて、メチルエチルケトンに可溶かつメタノールに不溶な成分の重量平均分子量を測定した。
(コアシェル重合体組成物A-4の作製)
PPG(12)DA26.6gの代わりに、PTMG(3)DA11.0gとアリルメタクリレート(以下、AMAとする)0.8gを使用した以外は、実施例1と同様の方法にて、コアシェル重合体組成物A-4を作製した。なお、コアとなるアクリレート系重合体の体積平均粒子径は、0.20μmであり、アクリレート系重合体を形成する単量体成分の重合転化率は99.6%であった。上記により、コア成分75重量%、シェル成分25重量%からなるコアシェル重合体組成物A-4のラテックスを得た。なお、重合完結後の総単量体成分の重合転化率は99.9%であった。
コアシェル重合体組成物A-4のラテックスを使用した以外は、実施例1と同様の方法にて、白色樹脂粉末のコアシェル重合体組成物A-4としてB-4を得た。
5.0重量部のコアシェル重合体組成物A-4の白色樹脂粉末B-4を使用した以外は、実施例1と同様の方法にて、熱可塑性樹脂組成物C-4を得た。
得られた熱可塑性樹脂組成物C-4を用い、実施例1と同様の方法にて窓枠成形体を調製し、また実施例1と同様の方法にて表面光沢の評価を行なった。
上記の熱可塑性樹脂組成物C-4を用い、実施例1と同様の方法にて、メチルエチルケトンに可溶かつメタノールに不溶な成分の重量平均分子量を測定した。
Claims (9)
- 熱可塑性樹脂(a)100重量部、及びコアシェル重合体組成物(b)0.5~30重量部を含む熱可塑性樹脂組成物であって、
該コアシェル重合体組成物(b)が、コア構成成分を重合して得られるコアの存在下に、シェル構成成分を重合して得られ、
該コア構成成分が、炭素数が2~18のアルキル基を有するアルキルアクリレート70~99.95重量%、多官能性単量体0.05~10重量%、及びこれらと共重合可能な単量体0~20重量%からなる単量体混合物、合計100重量%からなり、かつ、
該多官能性単量体100重量%が、分子内に同一のラジカル重合性官能基を複数有する化合物51~100重量%、及び分子内に互いに異なるラジカル重合性官能基を複数有する化合物0~49重量%からなることを特徴とする、熱可塑性樹脂組成物。 - 前記分子内に同一のラジカル重合性官能基を複数有する化合物の主鎖が、主としてアルキレングリコール単位の繰り返し構造からなり、かつ、該繰り返し構造の繰り返し単位数の数平均値が3以上である、請求項1記載の熱可塑性樹脂組成物。
- 前記分子内に互いに異なるラジカル重合性官能基を複数有する化合物が、アリル基を有する、請求項1、又は2に記載の熱可塑性樹脂組成物。
- 前記コアシェル重合体組成物(b)のメチルエチルケトンに可溶かつメタノールに不溶な成分の分子量が、50万以上であり、その成分量が、前記コアシェル重合体組成物(b)中5~20%であることを特徴とする、請求項1~3のいずれかに記載の熱可塑性樹脂組成物。
- 前記コアシェル重合体組成物(b)全体量を100重量%として、前記コア構成成分が50~95重量%、前記シェル構成成分が5~50重量%である、請求項1~4のいずれかに記載の熱可塑性樹脂組成物。
- 前記熱可塑性樹脂(a)が塩化ビニル系樹脂である、請求項1~5のいずれかに記載の熱可塑性樹脂組成物。
- 請求項6に記載の熱可塑性樹脂組成物を成形して得られる成形体。
- 前記成形体が、窓枠またはドアフレームである請求項7記載の成形体。
- 前記成形体が、サイディングである請求項7記載の成形体。
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