JP5453511B2 - Graft copolymer, thermoplastic resin composition, and method for producing graft copolymer - Google Patents
Graft copolymer, thermoplastic resin composition, and method for producing graft copolymer Download PDFInfo
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本発明は、耐候性、耐衝撃性、流動性だけでなく、滞留熱安定性に優れた熱可塑性樹脂組成物を構成するグラフト共重合体、該グラフト共重合体から得られた熱可塑性樹脂組成物及び該グラフト共重合体の製造方法に関する。 The present invention relates to a graft copolymer constituting a thermoplastic resin composition excellent not only in weather resistance, impact resistance and fluidity but also in residence heat stability, and a thermoplastic resin composition obtained from the graft copolymer. And a method for producing the graft copolymer.
ＡＢＳ樹脂は、耐衝撃性及び加工性のバランスに優れた樹脂であり、自動車等の車両用内外装部品、各種の家電製品やＯＡ機器のハウジング、その他雑貨分野等、幅広い分野に使用されている。しかし、ＡＢＳ樹脂は、そのゴム成分として使用するブタジエン系ゴム重合体が紫外線等により分解され易いことから、耐候性に劣るという欠点を有している。そこで、ＡＢＳ樹脂中のゴム成分をアクリルゴムに置換することで耐候性を改良した、ＡＳＡ樹脂が実用化されている。しかし、ＡＳＡ樹脂は耐候性に優れているものの、その反面、耐衝撃性、発色性に劣るという欠点を有している。 ABS resin is a resin with an excellent balance between impact resistance and workability, and is used in a wide range of fields such as interior and exterior parts for vehicles such as automobiles, housings for various home appliances and OA equipment, and other miscellaneous goods. . However, the ABS resin has a disadvantage that the weather resistance is inferior because the butadiene rubber polymer used as the rubber component is easily decomposed by ultraviolet rays or the like. Then, the ASA resin which improved the weather resistance by substituting the rubber component in ABS resin for acrylic rubber is put into practical use. However, although ASA resin is excellent in weather resistance, it has a disadvantage that it is inferior in impact resistance and color development.
特許文献１には耐衝撃性、耐候性、成形加工性が改良された熱可塑性樹脂組成物として、特定の分子量を有するジエン系ゴムとアクリル酸エステル系重合体とで構成される複合ゴムを用いた熱可塑性樹脂組成物が提案されている。しかし、滞留熱安定性が不十分であるという問題がある。 Patent Document 1 uses a composite rubber composed of a diene rubber having a specific molecular weight and an acrylate ester polymer as a thermoplastic resin composition having improved impact resistance, weather resistance and molding processability. A thermoplastic resin composition has been proposed. However, there is a problem that the residence heat stability is insufficient.
また、特許文献２には耐熱性、耐候性、成形加工性、さらには成形品の表面外観が改良された熱可塑性樹脂組成物として、共役ジエン系ゴム状重合体とアクリル酸エステル系ゴム状重合体からなる複合ゴムを使用したグラフト共重合体とマレイミド系共重合体から構成される熱可塑性樹脂組成物が提案されている。しかし、滞留熱安定性が不十分であるという問題がある。 Further, Patent Document 2 discloses a conjugated diene rubber polymer and an acrylate rubber rubber as a thermoplastic resin composition having improved heat resistance, weather resistance, moldability, and surface appearance of a molded product. There has been proposed a thermoplastic resin composition composed of a graft copolymer using a composite rubber made of a coalescence and a maleimide copolymer. However, there is a problem that the residence heat stability is insufficient.
本発明の目的は、耐候性、耐衝撃性、流動性だけでなく、滞留熱安定性に優れた熱可塑性樹脂組成物を構成するグラフト共重合体、該グラフト共重合体から得られた熱可塑性樹脂組成物及び該グラフト共重合体の製造方法を提供することにある。 An object of the present invention is to provide a graft copolymer constituting a thermoplastic resin composition excellent in not only weather resistance, impact resistance and fluidity but also residence heat stability, and thermoplasticity obtained from the graft copolymer. It is providing the resin composition and the manufacturing method of this graft copolymer.
本発明者らは、従来技術の問題点を解決するために鋭意検討した結果、特定のポリマー構成を持つ複合ゴムに、シアン化ビニル系単量体、芳香族ビニル系単量体等の単量体混合物をグラフト重合して得られるグラフト共重合体を用いることにより、上記目的を達成できることを見出し、本発明に到達した。 As a result of diligent studies to solve the problems of the prior art, the present inventors have found that a composite rubber having a specific polymer configuration includes a single monomer such as a vinyl cyanide monomer or an aromatic vinyl monomer. The inventors have found that the above object can be achieved by using a graft copolymer obtained by graft polymerization of a body mixture, and have reached the present invention.
すなわち、共役ジエン系ゴム状重合体５〜５０重量％と架橋アクリル酸エステル系重合体５０〜９５重量％から構成される複合ゴム１０〜８０重量部に、シアン化ビニル系単量体、芳香族ビニル系単量体及びこれらと共重合可能な他のビニル系単量体から選ばれた少なくとも１種からなる単量体２０〜９０重量部をグラフト重合して得られ、グラフト共重合体中に存在する複合ゴムに関して、円相当粒子径が１５０ｎｍ以下である複合ゴムの粒子数が複合ゴム粒子全体の５０％以下であることを特徴とするグラフト共重合体（Ａ）及び該グラフト共重合体（Ａ）と共重合体（Ｂ）を含む熱可塑性樹脂組成物に関する。 That is, 10 to 80 parts by weight of a composite rubber composed of 5 to 50% by weight of a conjugated diene rubbery polymer and 50 to 95% by weight of a crosslinked acrylate polymer is added to a vinyl cyanide monomer and an aromatic. It is obtained by graft polymerization of 20 to 90 parts by weight of at least one monomer selected from vinyl monomers and other vinyl monomers copolymerizable therewith, in the graft copolymer. Regarding the existing composite rubber, the number of particles of the composite rubber having a circle equivalent particle diameter of 150 nm or less is 50% or less of the total composite rubber particles, and the graft copolymer (A) and the graft copolymer ( The present invention relates to a thermoplastic resin composition containing A) and a copolymer (B).
本発明により、耐候性、耐衝撃性、流動性だけでなく、滞留熱安定性に優れたグラフト共重合体、該グラフト共重合体を用いて得られた熱可塑性樹脂組成物及びグラフト共重合体の製造方法を提供することが出来る。 INDUSTRIAL APPLICABILITY According to the present invention, not only weather resistance, impact resistance and fluidity but also a graft copolymer excellent in residence heat stability, a thermoplastic resin composition and a graft copolymer obtained using the graft copolymer The manufacturing method can be provided.
以下、本発明を詳しく説明する。
本発明のグラフト共重合体（Ａ）は、共役ジエン系ゴム状重合体と架橋アクリル酸エステル系重合体から構成される複合ゴムの存在下に芳香族ビニル系単量体、シアン化ビニル系単量体、及びこれらと共重合可能な他のビニル系単量体から選ばれた少なくとも１種の単量体をグラフト重合して得られた、グラフト共重合体である。
The present invention will be described in detail below.
The graft copolymer (A) of the present invention comprises an aromatic vinyl monomer and a vinyl cyanide monomer in the presence of a composite rubber composed of a conjugated diene rubber polymer and a crosslinked acrylate polymer. It is a graft copolymer obtained by graft polymerization of at least one monomer selected from a monomer and other vinyl monomers copolymerizable therewith.
本発明で使用される複合ゴムを構成する共役ジエン系ゴム状重合体としては、ポリブタジエンゴム、スチレン−ブタジエンゴム（ＳＢＲ）、スチレン−ブタジエン−スチレン（ＳＢＳ）ブロックコポリマー、スチレン−（エチレン−ブタジエン）−スチレン（ＳＥＢＳ）ブロックコポリマー、アクリロニトリル−ブタジエンゴム（ＮＢＲ）、メチルメタクリレート−ブタジエンゴムが挙げられる。特に、ポリブタジエンゴム、スチレン−ブタジエンゴムが好ましい。 Examples of the conjugated diene rubber-like polymer constituting the composite rubber used in the present invention include polybutadiene rubber, styrene-butadiene rubber (SBR), styrene-butadiene-styrene (SBS) block copolymer, and styrene- (ethylene-butadiene). -Styrene (SEBS) block copolymer, acrylonitrile-butadiene rubber (NBR), methyl methacrylate-butadiene rubber. In particular, polybutadiene rubber and styrene-butadiene rubber are preferable.
複合ゴムを構成する共役ジエン系ゴム状重合体の重量平均粒子径に特に制限は無いが、物性バランスの観点から、０．１〜１．０μｍであることが好ましく、０．２〜０．５μｍであることがより好ましい。また、共役ジエン系ゴム状重合体の重量平均粒子径の調節は公知の方法が使用できるが、比較的小粒子径の共役ジエン系ゴム状重合体を予め製造し、凝集肥大化させることで目的とする重量平均粒子径とした、凝集肥大化共役ジエン系ゴム状重合体を用いることも可能である。 Although there is no restriction | limiting in particular in the weight average particle diameter of the conjugated diene type rubber-like polymer which comprises a composite rubber, From a viewpoint of a physical-property balance, it is preferable that it is 0.1-1.0 micrometer, 0.2-0.5 micrometer. It is more preferable that The weight average particle diameter of the conjugated diene rubber-like polymer can be adjusted by a known method, but the purpose is to produce a conjugated diene rubber-like polymer having a relatively small particle diameter in advance and agglomerate it. It is also possible to use an agglomerated enlarged conjugated diene rubbery polymer having a weight average particle diameter of
本発明で使用される複合ゴムを構成する架橋アクリル酸エステル系重合体は、架橋剤の存在下にアルキル基の炭素数が１〜１６のアクリル酸エステル系単量体、例えばメチルアクリレート、エチルアクリレート、ブチルアクリレート、２−エチルヘキシルアクリレート等を一種又は二種以上、さらには必要に応じて他の共重合可能な単量体、例えばスチレン、アクリロニトリル、メチルメタクリレート等を一種又は二種以上を重合して得られる重合体である。 The crosslinked acrylate polymer constituting the composite rubber used in the present invention is an acrylate monomer having an alkyl group having 1 to 16 carbon atoms in the presence of a crosslinking agent, such as methyl acrylate or ethyl acrylate. , Butyl acrylate, 2-ethylhexyl acrylate, or the like, or, if necessary, other copolymerizable monomers such as styrene, acrylonitrile, methyl methacrylate, etc. The resulting polymer.
複合ゴムを構成する架橋アクリル酸エステル系重合体に用いられる架橋剤としては、例えばジビニルベンゼン、アリル（メタ）アクリレート、エチレングリコールジ（メタ）アクリレート、ジアリルフタレート、ジシクロペンタジエンジ（メタ）アクリレート、トリメチロールプロパントリ（メタ）アクリレート、ペンタエリスリトールヘキサ（メタ）アクリレート、１，４−ブタンジオールジ（メタ）アクリレート、１，６−ヘキサンジオールジ（メタ）アクリレート、トリアリルシアヌレート、トリアリルイソシアヌレート等が挙げられる。 Examples of the crosslinking agent used in the crosslinked acrylic acid ester polymer constituting the composite rubber include divinylbenzene, allyl (meth) acrylate, ethylene glycol di (meth) acrylate, diallyl phthalate, dicyclopentadiene di (meth) acrylate, Trimethylolpropane tri (meth) acrylate, pentaerythritol hexa (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, triallyl cyanurate, triallyl isocyanurate Etc.
本発明で使用される複合ゴムは、共役ジエン系ゴム状重合体の存在下で、架橋アクリル酸エステル系重合体を構成する単量体（混合物）を乳化重合することよって得ることができる。すなわち、本発明の複合ゴムは共役ジエン系ゴム状重合体がコアであり、架橋アクリル酸エステル系重合体がシェルであるコアシェル構造を有している。 The composite rubber used in the present invention can be obtained by emulsion polymerization of a monomer (mixture) constituting a crosslinked acrylate ester polymer in the presence of a conjugated diene rubber polymer. That is, the composite rubber of the present invention has a core-shell structure in which the conjugated diene rubber-like polymer is the core and the crosslinked acrylate polymer is the shell.
本発明で使用される複合ゴムを構成する共役ジエン系ゴム状重合体と架橋アクリル酸エステル系重合体の比率は、共役ジエン系ゴム状重合体５〜５０重量％、架橋アクリル酸エステル系重合体５０〜９５重量％であることが必要であるが、物性バランスの観点から共役ジエン系ゴム状重合体が７〜４０重量％であることが好ましく、１０〜３０重量％であることがより好ましい。 The ratio of the conjugated diene rubbery polymer and the crosslinked acrylate polymer constituting the composite rubber used in the present invention is 5 to 50% by weight of the conjugated diene rubbery polymer, and the crosslinked acrylate polymer. Although it is necessary to be 50 to 95% by weight, the conjugated diene rubbery polymer is preferably 7 to 40% by weight and more preferably 10 to 30% by weight from the viewpoint of balance of physical properties.
本発明で使用される複合ゴムは、上述の通り共役ジエン系ゴム状重合体コアであり、架橋アクリル酸エステル系重合体がシェルであるコアシェル構造を有していることを特徴としているが、架橋アクリル酸エステル系重合体全てが共役ジエン系ゴム状重合体に重合しているとは限らず、一部は架橋アクリル酸エステル系重合体の単独粒子として存在している可能性がある。以後、共役ジエン系ゴム状重合体と架橋アクリル酸エステル系重合体とがコアシェル構造を有している複合ゴムのみだけでなく、単独で存在している架橋アクリル酸エステル系重合体を含んだ状態であっても複合ゴムと呼称する。 The composite rubber used in the present invention is a conjugated diene rubber-like polymer core as described above, and is characterized by having a core-shell structure in which the cross-linked acrylate polymer is a shell. Not all acrylate-based polymers are polymerized into conjugated diene rubber-like polymers, and some may exist as single particles of crosslinked acrylate-based polymers. Thereafter, the conjugated diene rubber-like polymer and the cross-linked acrylic acid ester polymer include not only the composite rubber having a core-shell structure but also the cross-linked acrylic acid ester polymer present alone. Even so, it is called composite rubber.
本発明ではグラフト共重合体（Ａ）中に存在する複合ゴムに関して、円相当粒子径が１５０ｎｍ以下である複合ゴムの粒子数が、複合ゴム粒子全体の５０％以下となっている必要がある。円相当粒子径が１５０ｎｍ以下である複合ゴムの粒子数が５０％より多いと、得られるグラフト共重合体（Ａ）の滞留熱安定性に劣る。円相当粒子径が１５０ｎｍ以下である粒子数が４０％以下であることが好ましく、２０％以下であることがより好ましい。 In the present invention, regarding the composite rubber present in the graft copolymer (A), the number of composite rubber particles having an equivalent circle particle diameter of 150 nm or less needs to be 50% or less of the total composite rubber particles. If the number of particles of the composite rubber having an equivalent circle particle diameter of 150 nm or less is more than 50%, the retention heat stability of the resulting graft copolymer (A) is inferior. The number of particles having a circle-equivalent particle diameter of 150 nm or less is preferably 40% or less, and more preferably 20% or less.
グラフト共重合体（Ａ）中に存在する、円相当粒子径が１５０ｎｍ以下である複合ゴムとしては、上述の架橋アクリル酸エステル系重合体の単独粒子である場合が多く、該単独粒子がグラフト共重合体の滞留熱安定性に悪影響を及ぼす主要因となる。従って、円相当粒子径が１５０ｎｍ以下である粒子を減らすためには、複合ゴムの製造の際に、出来るだけ架橋アクリル酸エステル系重合体の単独粒子を生成させないようにする必要がある。 The composite rubber present in the graft copolymer (A) and having an equivalent circle particle diameter of 150 nm or less is often a single particle of the above-mentioned crosslinked acrylate polymer, and the single particle is a graft copolymer. It is the main factor that adversely affects the residence heat stability of the polymer. Therefore, in order to reduce particles having an equivalent circle particle diameter of 150 nm or less, it is necessary to prevent the generation of single particles of a crosslinked acrylate ester polymer as much as possible during the production of the composite rubber.
また、コアシェル構造を有している複合ゴムであっても、円相当粒子径が１５０ｎｍ以下であれば滞留熱安定性に悪影響を与えるため、本発明は架橋アクリル酸エステル系重合体の単独粒子を含む複合ゴムに対して、円相当粒子径が１５０ｎｍ以下である粒子数が５０％以下である事が必要である。 In addition, even if the composite rubber having a core-shell structure is used, since the equivalent thermal particle diameter has an adverse effect on the residence heat stability if the equivalent-circle particle diameter is 150 nm or less, the present invention is not limited to a single particle of a crosslinked acrylate ester polymer. It is necessary that the number of particles having a circle equivalent particle diameter of 150 nm or less is 50% or less with respect to the composite rubber to be included.
本発明で用いる複合ゴムの重合時に架橋アクリル酸エステル系重合体の単独粒子を生成させない方法としては、いかなる方法であっても構わないが、例えば乳化剤量、モノマー添加速度等を変更する方法が挙げられる。 Any method may be used as a method of not producing single particles of the crosslinked acrylic ester polymer at the time of polymerization of the composite rubber used in the present invention. For example, a method of changing an emulsifier amount, a monomer addition rate, etc. It is done.
複合ゴムを重合する際、使用する重合開始剤としては、過硫酸カリウム、過硫酸ナトリウム、過硫酸アンモニウム等の水溶性重合開始剤、クメンハイドロパーオキサイド、過酸化ベンゾイル、t−ブチルハイドロパーオキサイド、アセチルパーオキサイド、ジイソプロピルベンゼンハイドロパーオキサイド、１，１，３，３−テトラメチルブチルハイドロパーオキサイド等の油溶性重合開始剤を適宜用いることができる。さらに、好ましく用いられる還元剤の具体例としては、硫酸第一鉄７水塩、亜硫酸塩、亜硫酸水素塩、ピロ亜硫酸塩、亜ニチオン酸塩、ニチオン酸塩、チオ硫酸塩、ホルムアルデヒドスルホン酸塩、ベンズアルデヒドスルホン酸塩、また、Ｌ−アスコルビン酸、酒石酸、クエン酸などのカルボン酸類、更にはラクトース、デキストロース、サッカロースなどの還元糖類、更にはジメチルアニリン、トリエタノールアミンなどのアミン類が挙げられる。また、キレート剤としては、ピロリン酸四ナトリウム、エチレンジアミン四酢酸ナトリウムなどが挙げられる。 When polymerizing the composite rubber, the polymerization initiator used is a water-soluble polymerization initiator such as potassium persulfate, sodium persulfate, ammonium persulfate, cumene hydroperoxide, benzoyl peroxide, t-butyl hydroperoxide, acetyl Oil-soluble polymerization initiators such as peroxide, diisopropylbenzene hydroperoxide, 1,1,3,3-tetramethylbutyl hydroperoxide can be appropriately used. Furthermore, specific examples of the reducing agent preferably used include ferrous sulfate heptahydrate, sulfite, bisulfite, pyrosulfite, nitrite, nithionate, thiosulfate, formaldehyde sulfonate, Examples thereof include benzaldehyde sulfonate, carboxylic acids such as L-ascorbic acid, tartaric acid and citric acid, further reducing sugars such as lactose, dextrose and saccharose, and amines such as dimethylaniline and triethanolamine. Examples of the chelating agent include tetrasodium pyrophosphate and sodium ethylenediaminetetraacetate.
複合ゴムを重合する際、使用する乳化剤としては、カルボン酸塩、硫酸エステル塩、スルホン酸塩等を適宜用いることができる。さらに、好ましく用いられる乳化剤の具体例としては、オレイン酸カリウム、アルケニルコハク酸ジカリウム、ロジン酸ナトリウム、ドデシルベンゼンスルホン酸ナトリウム等が挙げられる。 As the emulsifier used when polymerizing the composite rubber, carboxylate, sulfate, sulfonate and the like can be used as appropriate. Furthermore, specific examples of emulsifiers preferably used include potassium oleate, dipotassium alkenyl succinate, sodium rosinate, sodium dodecylbenzenesulfonate, and the like.
本発明で使用される複合ゴムのトルエン溶媒でのゲル含有量に特に制限はないが、物性バランスの観点から、複合ゴムのゲル含有量が９０％以上であることが好ましく、９５％以上であることがより好ましい。 The gel content in the toluene solvent of the composite rubber used in the present invention is not particularly limited, but from the viewpoint of physical properties balance, the gel content of the composite rubber is preferably 90% or more, and 95% or more. It is more preferable.
本発明のグラフト共重合体（Ａ）は、上述の複合ゴムの存在下に、芳香族ビニル系単量体、シアン化ビニル系単量体、及びこれらと共重合可能な他のビニル系単量体から選ばれた少なくとも１種の単量体をグラフト重合して得られるグラフト共重合体である。 The graft copolymer (A) of the present invention comprises an aromatic vinyl monomer, a vinyl cyanide monomer, and other vinyl monomers copolymerizable therewith in the presence of the above composite rubber. A graft copolymer obtained by graft polymerization of at least one monomer selected from the body.
本発明のグラフト共重合体（Ａ）は該グラフト共重合体１００重量部中に複合ゴムが１０〜８０重量部含まれている必要がある。複合ゴムが１０重量部より少ないと耐衝撃性に劣り、８０重量部を超えると流動性に劣る。複合ゴムの含有量は３０〜７０重量部であることが好ましく、４０〜６０重量部であることがより好ましい。 The graft copolymer (A) of the present invention needs to contain 10 to 80 parts by weight of composite rubber in 100 parts by weight of the graft copolymer. If the composite rubber is less than 10 parts by weight, the impact resistance is poor, and if it exceeds 80 parts by weight, the fluidity is poor. The content of the composite rubber is preferably 30 to 70 parts by weight, and more preferably 40 to 60 parts by weight.
グラフト共重合体（Ａ）を構成する芳香族ビニル系単量体としては、スチレン、α−メチルスチレン、パラメチルスチレン、ブロムスチレン等が挙げられ、一種又は二種以上用いることができる。特にスチレン、α−メチルスチレンが好ましい。 Examples of the aromatic vinyl monomer constituting the graft copolymer (A) include styrene, α-methylstyrene, paramethylstyrene, bromostyrene, and the like, and one or more of them can be used. In particular, styrene and α-methylstyrene are preferable.
グラフト共重合体（Ａ）を構成するシアン化ビニル系単量体としては、アクリロニトリル、メタクリロニトリル、エタクリロニトリル、フマロニトリル等が挙げられ、一種又は二種以上用いることができる。特にアクリロニトリルが好ましい。 Examples of the vinyl cyanide monomer constituting the graft copolymer (A) include acrylonitrile, methacrylonitrile, ethacrylonitrile, fumaronitrile and the like, and one or more of them can be used. Particularly preferred is acrylonitrile.
グラフト共重合体（Ａ）を構成する共重合可能な他のビニル系単量体としては、（メタ）アクリル酸エステル系単量体、マレイミド系単量体、アミド系単量体等が挙げられ、一種又は二種以上用いることができる。（メタ）アクリル酸エステル系単量体としては（メタ）アクリル酸メチル、（メタ）アクリル酸エチル、（メタ）アクリル酸プロピル、（メタ）アクリル酸ブチル、アクリル酸２−エチルヘキシル、（メタ）アクリル酸フェニル、（メタ）アクリル酸４−ｔ−ブチルフェニル、（メタ）アクリル酸（ジ）ブロモフェニル、（メタ）アクリル酸クロルフェニル等を例示でき、マレイミド系単量体としてはＮ−フェニルマレイミド、Ｎ−シクロヘキシルマレイミド等を例示でき、アミド系単量体としてはアクリルアミド、メタクリルアミド等を例示できる。 Examples of other copolymerizable vinyl monomers constituting the graft copolymer (A) include (meth) acrylic acid ester monomers, maleimide monomers, amide monomers, and the like. 1 type, or 2 or more types can be used. (Meth) acrylic acid ester monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl acrylate, (meth) acrylic Examples include phenyl acid, 4-t-butylphenyl (meth) acrylate, (di) bromophenyl (meth) acrylic acid, chlorophenyl (meth) acrylate, and the maleimide monomer includes N-phenylmaleimide, N-cyclohexylmaleimide and the like can be exemplified, and examples of the amide monomer include acrylamide and methacrylamide.
複合ゴムとグラフト重合する上述の単量体の組成比率に特に制限はないが、芳香族ビニル系単量体６０〜９０重量％、シアン化ビニル系単量体１０〜４０重量％及び共重合可能な他のビニル系単量体０〜３０重量％の組成比率、芳香族ビニル系単量体３０〜８０重量％、（メタ）アクリル酸エステル系単量体２０〜７０重量％及び共重合可能な他のビニル系単量体０〜５０重量％の組成比率、芳香族ビニル系単量体２０〜７０重量％、（メタ）アクリル酸エステル系単量体２０〜７０重量％、シアン化ビニル系単量体１０〜６０重量％及び共重合可能な他のビニル系単量体０〜３０重量％の組成比率等であることが好ましい。 The composition ratio of the above-mentioned monomer graft-polymerized with the composite rubber is not particularly limited, but 60 to 90% by weight of aromatic vinyl monomer, 10 to 40% by weight of vinyl cyanide monomer, and copolymerizable Other vinyl monomer composition ratio of 0 to 30% by weight, aromatic vinyl monomer 30 to 80% by weight, (meth) acrylic acid ester monomer 20 to 70% by weight and copolymerizable Composition ratio of other vinyl monomers 0 to 50% by weight, aromatic vinyl monomers 20 to 70% by weight, (meth) acrylic acid ester monomers 20 to 70% by weight, vinyl cyanide monomer The composition ratio is preferably 10 to 60% by weight of the monomer and 0 to 30% by weight of another copolymerizable vinyl monomer.
本発明のグラフト共重合体（Ａ）を重合するための手法に特に制限はなく、乳化重合法、懸濁重合法、塊状重合法等を用いることが出来る。乳化重合法を用いた場合、上述の複合ゴムに上述の単量体をグラフト重合することによって、グラフト共重合体（Ａ）のラテックスを得ることが出来る。グラフト共重合体（Ａ）のラテックスは、公知の方法により凝固され、洗浄、脱水、乾燥工程を経ることでグラフト共重合体（Ａ）のパウダーを得ることができる。 There is no restriction | limiting in particular in the method for superposing | polymerizing the graft copolymer (A) of this invention, An emulsion polymerization method, suspension polymerization method, block polymerization method, etc. can be used. When the emulsion polymerization method is used, a latex of the graft copolymer (A) can be obtained by graft polymerization of the above-described monomer to the above-described composite rubber. The latex of the graft copolymer (A) is coagulated by a known method, and the powder of the graft copolymer (A) can be obtained through washing, dehydration, and drying steps.
本発明のグラフト共重合体（Ａ）の製造方法として、
乳化剤０〜０．１５重量部、共役ジエン系ゴム状重合体５〜５０重量部、アクリル酸エステル系単量体５〜３３重量部を含む組成物（複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量を１００重量部とする。）を０．５〜２．０時間保持する保持工程、及び
前記保持工程後に、重合開始剤０．０３〜０．１８重量部、乳化剤０．２〜１．５重量部、及びアクリル酸エステル系単量体１７〜９０重量部を（複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量を１００重量部とする。）、３５〜６０℃の温度で１〜６時間かけて前記組成物に連続添加する連続添加工程、
を含む事が好ましい。
As a production method of the graft copolymer (A) of the present invention,
A composition comprising 0 to 0.15 parts by weight of an emulsifier, 5 to 50 parts by weight of a conjugated diene rubbery polymer, and 5 to 33 parts by weight of an acrylate monomer (a conjugated diene rubbery material used for the production of a composite rubber) The total amount of the polymer and the acrylate monomer is 100 parts by weight.) A holding step for holding 0.5 to 2.0 hours, and a polymerization initiator 0.03 to 0.18 after the holding step Parts by weight, 0.2 to 1.5 parts by weight of an emulsifier, and 17 to 90 parts by weight of an acrylate monomer (a conjugated diene rubbery polymer and an acrylate monomer used in the production of a composite rubber) The continuous addition step of continuously adding to the composition at a temperature of 35 to 60 ° C. over 1 to 6 hours,
It is preferable to contain.
前記保持工程において組成物に含まれる乳化剤の量は、複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量１００重量部に対して０〜０．１５重量部であるが、０〜０．１重量部であることが好ましく、０〜０．０５重量部であることがより好ましく、乳化剤を用いないことが特に好ましい。 The amount of the emulsifier contained in the composition in the holding step is 0 to 0.15 parts by weight with respect to 100 parts by weight of the total amount of the conjugated diene rubbery polymer and the acrylate monomer used for the production of the composite rubber. However, it is preferably 0 to 0.1 parts by weight, more preferably 0 to 0.05 parts by weight, and particularly preferably no emulsifier.
前記保持工程において組成物に含まれる乳化剤の量は、複合ゴムの製造に用いる乳化剤の総量１００重量部に対して０〜１０重量部であることが好ましく、０〜５重量部であることがより好ましく、０〜１重量部であることがさらに好ましく、乳化剤を用いないことが特に好ましい。 The amount of the emulsifier contained in the composition in the holding step is preferably 0 to 10 parts by weight, more preferably 0 to 5 parts by weight with respect to 100 parts by weight of the total amount of emulsifiers used for producing the composite rubber. Preferably, it is 0 to 1 part by weight, and it is particularly preferable not to use an emulsifier.
前記連続添加工程において前記組成物に連続添加する乳化剤の量は、複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量１００重量部に対して０．２〜１．５重量部であるが、０．４〜１．３重量部であることが好ましく、０．６〜１．１重量部であることがより好ましい。 The amount of the emulsifier continuously added to the composition in the continuous addition step is 0.2 to about 100 parts by weight of the total amount of the conjugated diene rubbery polymer and the acrylate monomer used for the production of the composite rubber. Although it is 1.5 weight part, it is preferable that it is 0.4-1.3 weight part, and it is more preferable that it is 0.6-1.1 weight part.
前記連続添加工程において前記組成物に連続添加する重合開始剤の量は、複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量１００重量部に対して０．０３〜０．１８重量部であるが、０．０４〜０．１５重量部であることが好ましく、０．０５〜０．１２重量部であることがより好ましい。 The amount of the polymerization initiator that is continuously added to the composition in the continuous addition step is 0. 0 parts by weight based on 100 parts by weight of the total amount of the conjugated diene rubbery polymer and the acrylate monomer used for the production of the composite rubber. Although it is 03-0.18 weight part, it is preferable that it is 0.04-0.15 weight part, and it is more preferable that it is 0.05-0.12 weight part.
前記グラフト共重合体（Ａ）の製造方法は、前記保持工程及び前記連続添加工程に加えて、前記連続添加工程後に、前記組成物を３５〜６０℃の温度で１〜５時間保持する熟成工程をさらに含んでいても良い。 In addition to the holding step and the continuous addition step, the method for producing the graft copolymer (A) includes an aging step of holding the composition at a temperature of 35 to 60 ° C. for 1 to 5 hours after the continuous addition step. May further be included.
前記連続添加工程及び前記熟成工程における温度は３５〜６０℃であるが、３５〜５５℃であることがより好ましく、３５〜４５℃であることがさらに好ましい。 Although the temperature in the said continuous addition process and the said aging process is 35-60 degreeC, it is more preferable that it is 35-55 degreeC, and it is more preferable that it is 35-45 degreeC.
本発明のグラフト共重合体（Ａ）のグラフト率（グラフト共重合体のアセトン可溶分量と不溶分量及びグラフト共重合体中の複合ゴムの重量から求める。）、及びアセトン可溶分の還元粘度（０．４ｇ/１００ｃｃ、Ｎ，Ｎジメチルホルムアミド溶液として３０℃で測定）に特に制限はなく、要求性能によって任意の構造のものを使用することができるが、物性バランスの観点から、グラフト率は５〜１５０％であることが好ましく、還元粘度は０．２〜２．０ｄｌ／ｇであることが好ましい。 Graft ratio of graft copolymer (A) of the present invention (determined from the amount of acetone-soluble and insoluble components of the graft copolymer and the weight of the composite rubber in the graft copolymer), and the reduced viscosity of the acetone-soluble component. (0.4 g / 100 cc, measured at 30 ° C. as a N, N dimethylformamide solution) There is no particular limitation, and any structure can be used depending on the required performance, but from the viewpoint of balance of physical properties, the graft ratio is It is preferably 5 to 150%, and the reduced viscosity is preferably 0.2 to 2.0 dl / g.
得られたグラフト共重合体（Ａ）は単独で使用できるが、必要に応じて芳香族ビニル系単量体、シアン化ビニル系単量体、必要に応じてその他の共重合可能な他のビニル系単量体を共重合することで得られる共重合体（Ｂ）と混合し、熱可塑性樹脂組成物として使用することもできる。共重合体（Ｂ）と混合する場合は熱可塑性樹脂組成物中の複合ゴム含有量が３〜５０重量％とすることが物性バランスの観点から好ましく、１０〜３０重量％とすることがより好ましい。 The obtained graft copolymer (A) can be used alone, but if necessary, an aromatic vinyl monomer, a vinyl cyanide monomer, and other copolymerizable other vinyls as necessary. It can also be used as a thermoplastic resin composition by mixing with a copolymer (B) obtained by copolymerizing a monomer. When mixed with the copolymer (B), the content of the composite rubber in the thermoplastic resin composition is preferably 3 to 50% by weight from the viewpoint of balance of physical properties, more preferably 10 to 30% by weight. .
本発明の熱可塑性樹脂組成物は、必要に応じてヒンダードアミン系の光安定剤、ヒンダードフェノール系、含硫黄有機化合物系、含リン有機化合物系等の酸化防止剤、フェノール系、アクリレート系等の熱安定剤、ベンゾエート系、ベンゾトリアゾール系、ベンゾフェノン系、サリシレート系の紫外線吸収剤、有機ニッケル系、高級脂肪酸アミド類等の滑剤、リン酸エステル類等の可塑剤、ポリブロモフェニルエーテル、テトラブロモビスフェノール−Ａ、臭素化エポキシオリゴマー、臭素化等の含ハロゲン系化合物、リン系化合物、三酸化アンチモン等の難燃剤・難燃助剤、臭気マスキング剤、カーボンブラック、酸化チタン、顔料、及び染料等を添加することもできる。更に、タルク、炭酸カルシウム、水酸化アルミニウム、ガラス繊維、ガラスフレーク、ガラスビーズ、炭素繊維、金属繊維等の補強剤や充填剤を添加することもできる。 The thermoplastic resin composition of the present invention includes hindered amine-based light stabilizers, hindered phenol-based, sulfur-containing organic compound-based, phosphorus-containing organic compound-based antioxidants, phenol-based, acrylate-based and the like as necessary. Thermal stabilizer, benzoate, benzotriazole, benzophenone, salicylate UV absorbers, organic nickel, lubricants such as higher fatty acid amides, plasticizers such as phosphate esters, polybromophenyl ether, tetrabromobisphenol -A, brominated epoxy oligomers, halogenated compounds such as brominated compounds, phosphorus compounds, flame retardants and flame retardants such as antimony trioxide, odor masking agents, carbon black, titanium oxide, pigments, dyes, etc. It can also be added. Furthermore, reinforcing agents and fillers such as talc, calcium carbonate, aluminum hydroxide, glass fibers, glass flakes, glass beads, carbon fibers, and metal fibers can be added.
本発明の熱可塑性樹脂組成物は、上述の成分を混合することで得ることができる。混合するために、例えば、押出し機、ロール、バンバリーミキサー、ニーダー等の公知の混練装置を用いることができる。 The thermoplastic resin composition of the present invention can be obtained by mixing the above-described components. In order to mix, well-known kneading apparatuses, such as an extruder, a roll, a Banbury mixer, a kneader, can be used, for example.
以下に実施例を示して本発明を具体的に説明するが、本発明はこれらによって何ら制限されるものではない。なお、実施例中にて示す「部」及び「％」は重量に基づくものである。 EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In the examples, “parts” and “%” are based on weight.
小粒子径スチレン−ブタジエンゴムラテックスの製造
１０リットルの耐圧容器の内部を窒素で置換後、１，３−ブタジエン９５重量部、スチレン５重量部、ｎ−ドデシルメルカプタン０．５重量部、過硫酸カリウム０．３重量部、不均化ロジン酸ナトリウム１．８重量部、水酸化ナトリウム０．１重量部、脱イオン水１４５重量部を仕込み、攪拌しつつ７０℃で８時間反応させた。その後、不均化ロジン酸ナトリウム０．２重量部、水酸化ナトリウム０．１重量部及び脱イオン水５重量部を添加した。さらに温度を７０℃に維持しながら６時間攪拌を継続して反応を終了した。その後、減圧して残存している１，３−ブタジエンを除去し、スチレン−ブタジエンゴムラテックスを得た。得られたスチレン−ブタジエンゴムラテックスを、四酸化オスミウム（ＯｓＯ４）で染色し、乾燥後に透過型電子顕微鏡で写真撮影した。画像解析処理装置（装置名：旭化成（株）製 ＩＰ−１０００ＰＣ）を用いて１０００個のゴム粒子の面積を計測し、その円相当粒子径（直径）を求め、スチレン−ブタジエンゴムの重量平均粒子径を算出した結果、重量平均粒子径は１２０ｎｍであった
Production of small particle size styrene-butadiene rubber latex After replacing the inside of a 10 liter pressure vessel with nitrogen, 95 parts by weight of 1,3-butadiene, 5 parts by weight of styrene, 0.5 parts by weight of n-dodecyl mercaptan, potassium persulfate 0.3 parts by weight, disproportionated sodium rosinate 1.8 parts by weight, sodium hydroxide 0.1 parts by weight, and deionized water 145 parts by weight were charged and reacted at 70 ° C. for 8 hours with stirring. Thereafter, 0.2 parts by weight of disproportionated sodium rosinate, 0.1 parts by weight of sodium hydroxide and 5 parts by weight of deionized water were added. Further, stirring was continued for 6 hours while maintaining the temperature at 70 ° C. to complete the reaction. Thereafter, the remaining 1,3-butadiene was removed under reduced pressure to obtain a styrene-butadiene rubber latex. The obtained styrene-butadiene rubber latex was dyed with osmium tetroxide (OsO 4 ), dried, and photographed with a transmission electron microscope. Using an image analysis processor (apparatus name: IP-1000PC manufactured by Asahi Kasei Co., Ltd.), the area of 1000 rubber particles was measured, and the equivalent-circle particle diameter (diameter) was obtained. The weight average particle of styrene-butadiene rubber As a result of calculating the diameter, the weight average particle diameter was 120 nm.
凝集肥大化スチレン−ブタジエンゴムラテックスの製造
１０リットルの耐圧容器に、上記で得られたスチレン−ブタジエンゴムラテックス２７０重量部、ドデシルベンゼンスルホン酸ナトリウム０．１重量部を添加して１０分間攪拌混合した後、５％リン酸水溶液２０重量部を１０分間にわたり添加した。次いで１０％水酸化カリウム水溶液１０重量部を添加し、凝集肥大化したスチレン−ブタジエンゴムラテックス（１）を得た。
上述の方法で、凝集肥大化スチレン−ブタジエンゴムの重量平均粒子径を算出した結果、重量平均粒子径は３３０ｎｍであった。
Production of agglomerated styrene-butadiene rubber latex 270 parts by weight of the styrene-butadiene rubber latex obtained above and 0.1 part by weight of sodium dodecylbenzenesulfonate were added to a 10-liter pressure vessel and stirred for 10 minutes. Thereafter, 20 parts by weight of 5% aqueous phosphoric acid solution was added over 10 minutes. Subsequently, 10 parts by weight of a 10% aqueous potassium hydroxide solution was added to obtain an agglomerated styrene-butadiene rubber latex (1).
As a result of calculating the weight average particle diameter of the agglomerated styrene-butadiene rubber by the above-described method, the weight average particle diameter was 330 nm.
１０リットルの耐圧容器に、上記で得られたスチレン−ブタジエンゴムラテックス２７０重量部、ドデシルベンゼンスルホン酸ナトリウム０．３重量部を添加して１０分間攪拌混合した後、５％リン酸水溶液２０重量部を１０分間にわたり添加した。次いで１０％水酸化カリウム水溶液１０重量部を添加し、凝集肥大化したスチレン−ブタジエンゴムラテックス（２）を得た。
上述の方法で、凝集肥大化スチレン−ブタジエンゴムの重量平均粒子径を算出した結果、重量平均粒子径は２５０ｎｍであった。
To a 10 liter pressure vessel, 270 parts by weight of the styrene-butadiene rubber latex obtained above and 0.3 parts by weight of sodium dodecylbenzenesulfonate were added and stirred and mixed for 10 minutes, and then 20 parts by weight of 5% aqueous phosphoric acid solution. Was added over 10 minutes. Next, 10 parts by weight of a 10% aqueous potassium hydroxide solution was added to obtain an agglomerated styrene-butadiene rubber latex (2).
As a result of calculating the weight average particle size of the agglomerated styrene-butadiene rubber by the above-mentioned method, the weight average particle size was 250 nm.
架橋アクリル酸ブチルゴムラテックスの製造
窒素置換したガラスリアクターに、脱イオン水１８０重量部、アクリル酸ブチル１５重量部、メタクリル酸アリル０．１重量部、アルケニルコハク酸ジカリウム０．１６重量部（固形分換算）、過硫酸カリウム０．１５重量部を仕込み、６５℃で１時間反応させた。その後、アクリル酸ブチル８５重量部、メタクリル酸アリル０．５３重量部の混合液及び脱イオン水２０重量部にアルケニルコハク酸ジカリウム０．６４重量部（固形分換算）を溶解した乳化剤水溶液を３時間かけて連続的に添加した。滴下後、３時間保持して、架橋アクリル酸ブチルゴムラテックスを得た。
Production of cross-linked butyl acrylate rubber latex In a nitrogen-replaced glass reactor, 180 parts by weight of deionized water, 15 parts by weight of butyl acrylate, 0.1 parts by weight of allyl methacrylate, 0.16 parts by weight of dipotassium alkenyl succinate (in terms of solid content) ), 0.15 part by weight of potassium persulfate was added and reacted at 65 ° C. for 1 hour. Thereafter, an emulsifier aqueous solution in which 0.64 parts by weight of dipotassium alkenyl succinate (in terms of solid content) was dissolved in 85 parts by weight of butyl acrylate and 0.53 parts by weight of allyl methacrylate and 20 parts by weight of deionized water was added for 3 hours. Over time. After dripping, it was kept for 3 hours to obtain a crosslinked butyl acrylate rubber latex.
得られた架橋アクリル酸ブチルゴムラテックスの重量平均粒子径を下記に記載する方法で算出した。得られた架橋アクリル酸ブチルゴムラテックスを１５部（固形分）、スチレンを６４部、アクリロニトリルを２１部用いてグラフト共重合を行い、グラフト共重合体を得た。グラフト共重合体のパウダーを溶融混練してペレットを得た。得られたペレットを、クライオミクロトームを用いて−８５℃の雰囲気下で超薄切片を切り出し、四酸化ルテニウム（ＲｕＯ４）で染色し、透過型電子顕微鏡（ＪＥＭ−１４００：日本電子製）で写真撮影した。画像解析装置（旭化成 ＩＰ−１０００ＰＣ）を用いて、１０００個の複合ゴム粒子の面積を計測し、その円相当径（直径）を求め、架橋アクリル酸ブチルゴムラテックスの重量平均粒子径を算出した結果、重量平均粒子径は２００ｎｍであった。 The weight average particle diameter of the obtained crosslinked butyl acrylate rubber latex was calculated by the method described below. Graft copolymerization was performed using 15 parts (solid content) of the obtained crosslinked butyl acrylate rubber latex, 64 parts of styrene, and 21 parts of acrylonitrile to obtain a graft copolymer. The graft copolymer powder was melt-kneaded to obtain pellets. From the obtained pellet, an ultrathin section was cut out at −85 ° C. using a cryomicrotome, stained with ruthenium tetroxide (RuO 4 ), and photographed with a transmission electron microscope (JEM-1400: manufactured by JEOL Ltd.). I took a picture. Using an image analyzer (Asahi Kasei IP-1000PC), the area of 1000 composite rubber particles was measured, the equivalent circle diameter (diameter) was determined, and the weight average particle diameter of the crosslinked butyl acrylate rubber latex was calculated. The weight average particle diameter was 200 nm.
複合ゴム（ａ−１）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を２０重量部（固形分）、脱イオン水を１６０重量部仕込み、窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、アクリル酸ブチル２０重量部、メタクリル酸アリル０．１重量部を添加した。槽内の温度が５０℃に到達した後、１時間保持し、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した水溶液とアクリル酸ブチル６０重量部、メタクリル酸アリル０．４重量部を５時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-1) Into a 10 L glass reactor, 20 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water were charged, and nitrogen substitution was performed. It was. After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 20 parts by weight of butyl acrylate and 0.1 parts by weight of allyl methacrylate were added. An aqueous solution in which 0.9 part by weight of dipotassium alkenyl succinate and 0.1 part by weight of tertiary butyl hydroperoxide are dissolved in 25 parts by weight of deionized water after the temperature in the tank reaches 50 ° C. 60 parts by weight of butyl acrylate and 0.4 parts by weight of allyl methacrylate were continuously added dropwise over 5 hours. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−２）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を１０重量部（固形分）、脱イオン水を１６０重量部仕込み、窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、アクリル酸ブチル１５重量部、メタクリル酸アリル０．１重量部を添加した。槽内の温度が５０℃に到達した後、１時間保持し、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した水溶液とアクリル酸ブチル７５重量部、メタクリル酸アリル０．４６重量部を６時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-2) A 10 L glass reactor is charged with 10 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water, and nitrogen substitution is performed. It was. After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Further, 15 parts by weight of butyl acrylate and 0.1 parts by weight of allyl methacrylate were added. An aqueous solution in which 0.9 part by weight of dipotassium alkenyl succinate and 0.1 part by weight of tertiary butyl hydroperoxide are dissolved in 25 parts by weight of deionized water after the temperature in the tank reaches 50 ° C. 75 parts by weight of butyl acrylate and 0.46 parts by weight of allyl methacrylate were continuously added dropwise over 6 hours. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−３）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を３０重量部（固形分）、脱イオン水を１６０重量部仕込み、窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、アクリル酸ブチル２５重量部、メタクリル酸アリル０．２重量部を添加した。槽内の温度が５０℃に到達した後、１時間保持し、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した水溶液とアクリル酸ブチル４５重量部、メタクリル酸アリル０．２４重量部を３時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-3) A 10-liter glass reactor is charged with 30 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water, and nitrogen replacement is performed. It was. After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 25 parts by weight of butyl acrylate and 0.2 parts by weight of allyl methacrylate were added. An aqueous solution in which 0.9 part by weight of dipotassium alkenyl succinate and 0.1 part by weight of tertiary butyl hydroperoxide are dissolved in 25 parts by weight of deionized water after the temperature in the tank reaches 50 ° C. 45 parts by weight of butyl acrylate and 0.24 parts by weight of allyl methacrylate were continuously added dropwise over 3 hours. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−４）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（２）を２０重量部（固形分）、脱イオン水を１６０重量部仕込み、窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、アクリル酸ブチル２０重量部、メタクリル酸アリル０．１重量部を添加した。槽内の温度が５０℃に到達した後、１時間保持し、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した水溶液とアクリル酸ブチル６０重量部、メタクリル酸アリル０．４重量部を５時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-4) A 10-liter glass reactor is charged with 20 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (2) and 160 parts by weight of deionized water, followed by nitrogen replacement. It was. After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 20 parts by weight of butyl acrylate and 0.1 parts by weight of allyl methacrylate were added. An aqueous solution in which 0.9 part by weight of dipotassium alkenyl succinate and 0.1 part by weight of tertiary butyl hydroperoxide are dissolved in 25 parts by weight of deionized water after the temperature in the tank reaches 50 ° C. 60 parts by weight of butyl acrylate and 0.4 parts by weight of allyl methacrylate were continuously added dropwise over 5 hours. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−５）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を２０重量部（固形分）、脱イオン水を１６０重量部仕込み窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した乳化剤溶液の５％、アクリル酸ブチル１６重量部、メタクリル酸アリル０．１重量部を添加し、槽内の温度が５０℃に到達した後、１時間保持し、残りの乳化剤溶液とアクリル酸ブチル６４重量部、メタクリル酸アリル０．４重量部を５時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of Composite Rubber (a-5) A 10 L glass reactor was charged with 20 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water, followed by nitrogen substitution. . After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 5% of an emulsifier solution prepared by dissolving 0.9 parts by weight of dipotassium alkenyl succinate and 0.1 parts by weight of tertiary butyl hydroperoxide in 25 parts by weight of deionized water, 16 parts by weight of butyl acrylate, 0% of allyl methacrylate .1 part by weight was added, and the temperature in the tank reached 50 ° C., and held for 1 hour. The remaining emulsifier solution, 64 parts by weight of butyl acrylate, and 0.4 parts by weight of allyl methacrylate were added over 5 hours. It was dripped continuously. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−６）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を２０重量部（固形分）、脱イオン水を１６０重量部仕込み窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した乳化剤溶液の１０％、アクリル酸ブチル１６重量部、メタクリル酸アリル０．１重量部を添加し、槽内の温度が５０℃に到達した後、１時間保持し、残りの乳化剤溶液とアクリル酸ブチル６４重量部、メタクリル酸アリル０．４重量部を５時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-6) A 10 L glass reactor was charged with 20 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water, followed by nitrogen substitution. . After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 10% of an emulsifier solution in which 0.9 parts by weight of dipotassium alkenyl succinate and 0.1 parts by weight of tertiary butyl hydroperoxide are dissolved in 25 parts by weight of deionized water, 16 parts by weight of butyl acrylate, allyl methacrylate 0 .1 part by weight was added, and the temperature in the tank reached 50 ° C., and held for 1 hour. The remaining emulsifier solution, 64 parts by weight of butyl acrylate, and 0.4 parts by weight of allyl methacrylate were added over 5 hours. It was dripped continuously. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−７）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を２０重量部（固形分）、脱イオン水を１６０重量部仕込み窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した乳化剤溶液の２０％、アクリル酸ブチル１６重量部、メタクリル酸アリル０．１重量部を添加し、槽内の温度が５０℃に到達した後、１時間保持し、残りの乳化剤溶液とアクリル酸ブチル６４重量部、メタクリル酸アリル０．４重量部を５時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-7) A 10 L glass reactor was charged with 20 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water, followed by nitrogen substitution. . After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 20% of an emulsifier solution obtained by dissolving 0.9 parts by weight of dipotassium alkenyl succinate and 0.1 parts by weight of tertiary butyl hydroperoxide in 25 parts by weight of deionized water, 16 parts by weight of butyl acrylate, 0% of allyl methacrylate .1 part by weight was added, and after the temperature in the tank reached 50 ° C., it was kept for 1 hour. It was dripped continuously. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
複合ゴム（ａ−８）の製造
１０Ｌのガラスリアクターに、上記の凝集肥大化スチレン−ブタジエンゴムラテックス（１）を２０重量部（固形分）、脱イオン水を１６０重量部仕込み窒素置換を行った。窒素置換後、槽内を昇温し４５℃に到達したところで脱イオン水２０重量部にブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．０３重量部及び硫酸第１鉄０．００１重量部を溶解した水溶液を添加した。さらに、脱イオン水２５重量部にアルケニルコハク酸ジカリウム０．９重量部、ターシャリーブチルハイドロパーオキサイド０．１重量部を溶解した乳化剤溶液の４０％、アクリル酸ブチル１６重量部、メタクリル酸アリル０．１重量部を添加し、槽内の温度が５０℃に到達した後、１時間保持し、残りの乳化剤溶液とアクリル酸ブチル６４重量部、メタクリル酸アリル０．４重量部を５時間かけて連続的に滴下した。滴下後、３時間保持して、肥大化スチレン−ブタジエンゴムと架橋アクリル酸ブチル重合体から構成される複合ゴムラテックスを得た。
Manufacture of composite rubber (a-8) A 10 L glass reactor was charged with 20 parts by weight (solid content) of the above-mentioned agglomerated styrene-butadiene rubber latex (1) and 160 parts by weight of deionized water, followed by nitrogen substitution. . After nitrogen substitution, when the temperature in the tank reached 45 ° C., 0.2 parts by weight of glucose, 0.03 part by weight of anhydrous sodium pyrophosphate and 0.001 part by weight of ferrous sulfate were added to 20 parts by weight of deionized water. Dissolved aqueous solution was added. Furthermore, 40% of an emulsifier solution obtained by dissolving 0.9 parts by weight of dipotassium alkenyl succinate and 0.1 parts by weight of tertiary butyl hydroperoxide in 25 parts by weight of deionized water, 16 parts by weight of butyl acrylate, 0% of allyl methacrylate .1 part by weight was added, and the temperature in the tank reached 50 ° C., and held for 1 hour. The remaining emulsifier solution, 64 parts by weight of butyl acrylate, and 0.4 parts by weight of allyl methacrylate were added over 5 hours. It was dripped continuously. After dropping, the mixture was held for 3 hours to obtain a composite rubber latex composed of an enlarged styrene-butadiene rubber and a crosslinked butyl acrylate polymer.
グラフト共重合体（Ａ−１）の製造
ガラスリアクターに、複合ゴムラテックス（ａ−１）６０重量部（固形分）を仕込み窒素置換を行った。窒素置換後、槽内を昇温し６０℃に到達したところで、ブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．１重量部及び硫酸第１鉄０．００５重量部を脱イオン水１０重量部に溶解した水溶液を添加した。６５℃に到達後、アクリロニトリル１２重量部、スチレン２８重量部、ターシャリードデシルメルカプタン０．１部、クメンハイドロパーオキサイド０．３重量部の混合液及び脱イオン水２０重量部にオレイン酸カリウム１．０重量部を溶解した乳化剤水溶液を５時間かけて連続的に滴下した。滴下後、３時間保持してグラフト共重合体ラテックス（Ａ−１）を得た。その後、塩析・脱水・乾燥し、グラフト重合体（Ａ−１）のパウダーを得た。
Production of Graft Copolymer (A-1) Into a glass reactor, 60 parts by weight (solid content) of the composite rubber latex (a-1) was charged and nitrogen substitution was performed. After nitrogen substitution, when the temperature inside the tank reached 60 ° C., 0.2 part by weight of glucose, 0.1 part by weight of anhydrous sodium pyrophosphate and 0.005 part by weight of ferrous sulfate were added by 10 parts by weight of deionized water. An aqueous solution dissolved in was added. After reaching 65 ° C., a mixture of 12 parts by weight of acrylonitrile, 28 parts by weight of styrene, 0.1 part by weight of tertiary decyl mercaptan, 0.3 part by weight of cumene hydroperoxide and 20 parts by weight of deionized water was mixed with potassium oleate. An aqueous emulsifier solution in which 0 part by weight was dissolved was continuously added dropwise over 5 hours. After dropping, the mixture was held for 3 hours to obtain a graft copolymer latex (A-1). Thereafter, salting out, dehydration, and drying were performed to obtain a powder of the graft polymer (A-1).
グラフト共重合体（Ａ−２）〜（Ａ−８）の製造
複合ゴムラテックス（ａ−１）から複合ゴム（ａ−２）〜（ａ−８）に変更した以外はグラフト共重合体（Ａ−１）と同様に製造し、グラフト共重合体ラテックス（Ａ−２）〜（Ａ−８）を得た。その後、塩析・脱水・乾燥し、グラフト重合体（Ａ−２）〜（Ａ−８）のパウダーを得た。
Production of graft copolymers (A-2) to (A-8) Graft copolymers (A-2) except that the composite rubber latex (a-1) was changed to the composite rubbers (a-2) to (a-8). -1) to obtain graft copolymer latexes (A-2) to (A-8). Thereafter, salting out, dehydration and drying were performed to obtain powders of graft polymers (A-2) to (A-8).
グラフト共重合体（Ａ−９）の製造
ガラスリアクターに、凝集肥大化スチレン−ブタジエンゴムラテックス（１）を固形分換算で６０重量部仕込み、窒素置換を行った。窒素置換後、槽内を昇温し６０℃に到達したところで、ブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．１重量部及び硫酸第１鉄０．００５重量部を脱イオン水１０重量部に溶解した水溶液を添加した後に、６５℃に昇温した。その後、アクリロニトリル１２重量部、スチレン２８重量部、ターシャリードデシルメルカプタン０．１部、クメンハイドロパーオキサイド０．３重量部の混合液及び脱イオン水２０重量部にオレイン酸カリウム１．０重量部を溶解した乳化剤水溶液を４時間かけて連続的に滴下した。滴下後、３時間保持してグラフト共重合体ラテックス（Ａ−９）を得た。その後、塩析・脱水・乾燥し、グラフト重合体（Ａ−９）のパウダーを得た。
Production of Graft Copolymer (A-9) A glass reactor was charged with 60 parts by weight of agglomerated and enlarged styrene-butadiene rubber latex (1) in terms of solid content, and nitrogen substitution was performed. After nitrogen substitution, when the temperature inside the tank reached 60 ° C., 0.2 part by weight of glucose, 0.1 part by weight of anhydrous sodium pyrophosphate and 0.005 part by weight of ferrous sulfate were added by 10 parts by weight of deionized water. After adding the aqueous solution dissolved in the solution, the temperature was raised to 65 ° C. Thereafter, 12 parts by weight of acrylonitrile, 28 parts by weight of styrene, 0.1 part of tertiary decyl mercaptan, 0.3 part by weight of cumene hydroperoxide and 20 parts by weight of deionized water were added with 1.0 part by weight of potassium oleate. The dissolved aqueous emulsifier solution was continuously added dropwise over 4 hours. After dropping, the mixture was held for 3 hours to obtain a graft copolymer latex (A-9). Thereafter, salting out, dehydration, and drying were performed to obtain a graft polymer (A-9) powder.
グラフト共重合体（Ａ−１０）の製造
ガラスリアクターに、凝集肥大化スチレン−ブタジエンゴムラテックス（１）を固形分換算で１５重量部、架橋アクリル酸ブチルゴムラテックスを固形分換算で４５重量部仕込み、窒素置換を行った。窒素置換後、槽内を昇温し６０℃に到達したところで、ブドウ糖０．２重量部、無水ピロリン酸ナトリウム０．１重量部及び硫酸第１鉄０．００５重量部を脱イオン水１０重量部に溶解した水溶液を添加した後に、６５℃に昇温した。その後、アクリロニトリル１２重量部、スチレン２８重量部、ターシャリードデシルメルカプタン０．１部、クメンハイドロパーオキサイド０．３重量部の混合液及び脱イオン水２０重量部にオレイン酸カリウム１．０重量部を溶解した乳化剤水溶液を４時間かけて連続的に滴下した。滴下後、３時間保持してグラフト共重合体ラテックス（Ａ−１０）を得た。その後、塩析・脱水・乾燥し、グラフト重合体（Ａ−１０）のパウダーを得た。
Production of Graft Copolymer (A-10) A glass reactor was charged with 15 parts by weight of agglomerated and enlarged styrene-butadiene rubber latex (1) in terms of solids and 45 parts by weight of crosslinked butyl acrylate rubber latex in terms of solids. Nitrogen replacement was performed. After nitrogen substitution, when the temperature inside the tank reached 60 ° C., 0.2 part by weight of glucose, 0.1 part by weight of anhydrous sodium pyrophosphate and 0.005 part by weight of ferrous sulfate were added by 10 parts by weight of deionized water. After adding the aqueous solution dissolved in the solution, the temperature was raised to 65 ° C. Thereafter, 12 parts by weight of acrylonitrile, 28 parts by weight of styrene, 0.1 part of tertiary decyl mercaptan, 0.3 part by weight of cumene hydroperoxide and 20 parts by weight of deionized water were added with 1.0 part by weight of potassium oleate. The dissolved aqueous emulsifier solution was continuously added dropwise over 4 hours. After dropping, the mixture was held for 3 hours to obtain a graft copolymer latex (A-10). Thereafter, salting-out, dehydration and drying were performed to obtain a graft polymer (A-10) powder.
共重合体（Ｂ）の製造
公知の塊状重合法により、スチレン７０重量部、アクリロニトリル３０重量部からなる共重合体（Ｂ）を得た。上述の方法により、得られた共重合体（Ｂ）の還元粘度を測定した結果、還元粘度は０．６０ｄｌ／ｇであった。
Production of copolymer (B) A copolymer (B) comprising 70 parts by weight of styrene and 30 parts by weight of acrylonitrile was obtained by a known bulk polymerization method. As a result of measuring the reduced viscosity of the obtained copolymer (B) by the above method, the reduced viscosity was 0.60 dl / g.
添加剤
光安定剤：ＡＤＥＫＡ（株）製 アデカスタブ ＬＡ７７Ｙ
紫外線吸収剤：住友化学（株）製 スミソーブ２００
Additives Light stabilizer: ADEKA Corporation ADK STAB LA77Y
UV absorber: Sumitomo 200 manufactured by Sumitomo Chemical Co., Ltd.
＜実施例１〜１０及び比較例１〜４＞
表１に示すグラフト共重合体（Ａ）、共重合体（Ｂ）及び添加剤を混合した後、４０ｍｍ二軸押出機を用いて２４０℃にて溶融混練してペレット化することで実施例１〜１０、比較例１〜４の熱可塑性樹脂組成物のペレットを得た。得られたペレットより、２５０℃に設定した射出成形機にて種々の成形品を成形し、物性評価を行った。それぞれの評価方法を以下に示す。
<Examples 1 to 10 and Comparative Examples 1 to 4>
Example 1 by mixing the graft copolymer (A), copolymer (B) and additives shown in Table 1 and then pelletizing by mixing at 240 ° C. using a 40 mm twin screw extruder. To 10 and pellets of the thermoplastic resin composition of Comparative Examples 1 to 4 were obtained. Various molded products were molded from the obtained pellets with an injection molding machine set at 250 ° C., and physical properties were evaluated. Each evaluation method is shown below.
得られたペレットをクライオミクロトームを用いて−８５℃の低温で切り出すことで、超薄切片を得た。得られた超薄切片を四酸化ルテニウム（ＲｕＯ４）で染色し、透過電子顕微鏡（ＪＥＭ−１４００：日本電子製）を用いて観察及び写真撮影した。画像解析装置（旭化成 ＩＰ−１０００ＰＣ）を用いて１０００個の粒子の面積を計測し、その円相当径（直径）を求めることで、１５０ｎｍ以下である複合ゴムの粒子数の割合を算出した。結果を表１に示す。 The obtained pellet was cut out at a low temperature of −85 ° C. using a cryomicrotome to obtain an ultrathin section. The obtained ultrathin sections were stained with ruthenium tetroxide (RuO 4 ), and observed and photographed using a transmission electron microscope (JEM-1400: manufactured by JEOL Ltd.). The area of 1000 particles was measured using an image analysis apparatus (Asahi Kasei IP-1000PC), and the equivalent circle diameter (diameter) was determined to calculate the ratio of the number of composite rubber particles having a diameter of 150 nm or less. The results are shown in Table 1.
耐衝撃性
各実施例及び比較例で得られたペレットを用いＩＳＯ２９４に準拠して各種試験片を成形し、耐衝撃性を測定した。
耐衝撃性はＩＳＯ１７９に準拠し、４ｍｍ厚みで、ノッチ付きシャルピー衝撃値を測定した。単位：ｋＪ／ｍ２
Impact Resistance Various test pieces were molded according to ISO 294 using the pellets obtained in each Example and Comparative Example, and the impact resistance was measured.
The impact resistance was in conformity with ISO 179, and a Charpy impact value with a notch was measured at a thickness of 4 mm. Unit: kJ / m 2
流動性
各実施例及び比較例で得られたペレットを用い、ＩＳＯ１１３３に準拠して、２２０℃、１０ｋｇ荷重の条件でメルトボリュームフローレイトを測定した。単位；ｃｍ３／１０分
The pellets obtained in Examples and Comparative Examples fluidity, in compliance with ISO 1133, 220 ° C., was measured melt volume flow rate under the condition of 10kg load. Unit; cm 3/10 minutes
滞留熱安定性
各実施例及び比較例で得られたペレットを用い２６０℃に設定した射出成型機のシリンダー内に０分間、２０分間滞留させ成型して得られたプレートの光沢を測定し、光沢保持率を計算した。
光沢保持率＝（２０分間滞留させ成型した後測定した光沢／０分間滞留させ成型した後測定した光沢）×１００
Stability thermal stability Gloss of the plate obtained by retaining and molding in a cylinder of an injection molding machine set at 260C for 20 minutes using pellets obtained in each example and comparative example. Measure and calculate gloss retention.
Gloss retention ratio = (gloss measured after molding for 20 minutes / gloss measured after molding for 0 minute) × 100
耐候性
耐候性の評価には、各実施例及び比較例で得られたペレットを用い、射出成形機（山城精機製作所製 ＳＡＶ−３０−３０ シリンダー温度：２１０℃ 金型温度：５０℃）にて成形された成形品（９０ｍｍ×５５ｍｍ×２．５ｍｍ）を用いた。スガ試験機（株）製サンシャインスーパーロングライフウェザーメーター、ＷＥＬ−ＳＵＮ−ＨＣＨ−Ｂを使用し、６３℃、雨ありの条件下で５００時間の加速曝露試験を行った。その後測色計を用い、曝露前と曝露後の色差（ΔＥ）を測定した。
For evaluation of weather resistance, the pellets obtained in each of Examples and Comparative Examples were used, and injection molding machine (SAV-30-30 manufactured by Yamashiro Seiki Seisakusho, cylinder temperature: 210 ° C, mold temperature: 50 ° C) was used. A molded product (90 mm × 55 mm × 2.5 mm) was used. Using a Sunshine Super Long Life Weather Meter, WEL-SUN-HCH-B, manufactured by Suga Test Instruments Co., Ltd., an accelerated exposure test was conducted for 500 hours under conditions of 63 ° C. and rain. Thereafter, the color difference (ΔE) before and after exposure was measured using a colorimeter.
表１に示すように、実施例１〜１０は本発明に関わる熱可塑性樹脂組成物の例であり、耐候性、耐衝撃性、流動性及び滞留熱安定性に優れていた。特に円相当粒子径が１５０ｎｍ以下である複合ゴムの粒子数が１０％以下である実施例１〜３、５〜８は特に滞留熱安定性に優れていた。 As shown in Table 1, Examples 1 to 10 are examples of the thermoplastic resin composition according to the present invention, and were excellent in weather resistance, impact resistance, fluidity and residence heat stability. In particular, Examples 1 to 3 and 5 to 8 in which the number of particles of the composite rubber having an equivalent circle particle diameter of 150 nm or less was 10% or less were particularly excellent in the residence heat stability.
表１に示すように、比較例１〜２は円相当粒子径が１５０ｎｍ以下である複合ゴムの粒子数が５０％を超えていたため、滞留熱安定性に劣っていた。また、比較例３はグラフト共重合体としてＡＢＳ樹脂を用いているため耐候性に劣っていた。比較例４では共役ジエン系ゴム状重合体とアクリル酸エステル系重合体が複合ゴムとして存在していないため、耐候性に劣っていた。 As shown in Table 1, Comparative Examples 1 and 2 were inferior in residence heat stability because the number of particles of the composite rubber having an equivalent circle particle diameter of 150 nm or less exceeded 50%. Moreover, since the comparative example 3 used ABS resin as a graft copolymer, it was inferior to weather resistance. In Comparative Example 4, the conjugated diene rubber-like polymer and the acrylate ester polymer were not present as a composite rubber, so that the weather resistance was poor.
本発明のグラフト共重合体を用いた熱可塑性樹脂組成物は、耐候性、耐衝撃性、流動性及び滞留熱安定性に優れるため、車輌用外装部品、屋外で使用される製品等への利用価値が高い。 The thermoplastic resin composition using the graft copolymer of the present invention is excellent in weather resistance, impact resistance, fluidity and residence heat stability, and therefore is used for exterior parts for vehicles, products used outdoors, etc. High value.
Claims (3)
乳化剤０〜０．１５重量部、共役ジエン系ゴム状重合体５〜５０重量部、アクリル酸エステル系単量体５〜３３重量部及び架橋剤を含む組成物（複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量を１００重量部とする。）を０．５〜２．０時間保持する保持工程、及び
前記保持工程後に、重合開始剤０．０３〜０．１８重量部、乳化剤０．２〜１．５重量部、及びアクリル酸エステル系単量体１７〜９０重量部及び架橋剤を（複合ゴムの製造に用いる共役ジエン系ゴム状重合体及びアクリル酸エステル系単量体の総量を１００重量部とする。）、３５〜６０℃の温度で１〜６時間かけて前記組成物に連続添加する連続添加工程、
を含むことを特徴とするグラフト共重合体（Ａ）の製造方法。 It is a manufacturing method of the graft copolymer (A) of Claim 1, Comprising:
A composition comprising 0 to 0.15 parts by weight of an emulsifier, 5 to 50 parts by weight of a conjugated diene rubbery polymer, 5 to 33 parts by weight of an acrylate ester monomer and a crosslinking agent (a conjugated diene used in the production of a composite rubber) The total amount of the rubber-based polymer and the acrylate monomer is 100 parts by weight.) Holding step for 0.5 to 2.0 hours, and after the holding step, the polymerization initiator 0.03 0.18 parts by weight, 0.2 to 1.5 parts by weight of an emulsifier, 17 to 90 parts by weight of an acrylate monomer, and a crosslinking agent (a conjugated diene rubbery polymer and an acrylic used for the production of a composite rubber) The total amount of the acid ester monomer is 100 parts by weight.) A continuous addition step of continuously adding to the composition at a temperature of 35 to 60 ° C. over 1 to 6 hours,
A method for producing a graft copolymer (A), comprising:
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| JP2014122255A (en) * | 2012-12-20 | 2014-07-03 | Nippon A&L Inc | Thermoplastic resin composition and molded article |
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