JPH0684461B2 - Rubber-modified styrene resin composition - Google Patents
Rubber-modified styrene resin compositionInfo
- Publication number
- JPH0684461B2 JPH0684461B2 JP63179988A JP17998888A JPH0684461B2 JP H0684461 B2 JPH0684461 B2 JP H0684461B2 JP 63179988 A JP63179988 A JP 63179988A JP 17998888 A JP17998888 A JP 17998888A JP H0684461 B2 JPH0684461 B2 JP H0684461B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- particle size
- soft component
- resin composition
- average particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011342 resin composition Substances 0.000 title claims description 19
- 125000003011 styrenyl group Chemical class [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 title 1
- 239000002245 particle Substances 0.000 claims description 57
- 238000009826 distribution Methods 0.000 claims description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 12
- 239000013013 elastic material Substances 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 11
- 230000008961 swelling Effects 0.000 claims description 10
- 229920001890 Novodur Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920005669 high impact polystyrene Polymers 0.000 description 13
- 239000004797 high-impact polystyrene Substances 0.000 description 13
- 150000003440 styrenes Chemical class 0.000 description 12
- 238000006116 polymerization reaction Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QIVUCLWGARAQIO-OLIXTKCUSA-N (3s)-n-[(3s,5s,6r)-6-methyl-2-oxo-1-(2,2,2-trifluoroethyl)-5-(2,3,6-trifluorophenyl)piperidin-3-yl]-2-oxospiro[1h-pyrrolo[2,3-b]pyridine-3,6'-5,7-dihydrocyclopenta[b]pyridine]-3'-carboxamide Chemical compound C1([C@H]2[C@H](N(C(=O)[C@@H](NC(=O)C=3C=C4C[C@]5(CC4=NC=3)C3=CC=CN=C3NC5=O)C2)CC(F)(F)F)C)=C(F)C=CC(F)=C1F QIVUCLWGARAQIO-OLIXTKCUSA-N 0.000 description 1
- NVZWEEGUWXZOKI-UHFFFAOYSA-N 1-ethenyl-2-methylbenzene Chemical compound CC1=CC=CC=C1C=C NVZWEEGUWXZOKI-UHFFFAOYSA-N 0.000 description 1
- JZHGRUMIRATHIU-UHFFFAOYSA-N 1-ethenyl-3-methylbenzene Chemical compound CC1=CC=CC(C=C)=C1 JZHGRUMIRATHIU-UHFFFAOYSA-N 0.000 description 1
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- 239000005063 High cis polybutadiene Substances 0.000 description 1
- 239000005064 Low cis polybutadiene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、衝撃強度が改良されたゴム変性スチレン系樹
脂組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rubber-modified styrene resin composition having improved impact strength.
さらに詳しくは、強靱化剤として使用するゴム状弾性体
の含有量、ゴム状弾性体を含有してなる軟質成分（以下
軟質成分という。）の粒子径、粒子径分布、膨潤度及び
樹脂マトリックスの粘度が特定の範囲内にある衝撃強度
が著しく改良されたゴム変性スチレン系樹脂組成物に関
するものである。More specifically, the content of the rubber-like elastic material used as a toughening agent, the particle size of the soft component (hereinafter referred to as the soft component) containing the rubber-like elastic material, the particle size distribution, the swelling degree, and the resin matrix The present invention relates to a rubber-modified styrene resin composition having a viscosity within a specific range and significantly improved impact strength.
〈従来の技術〉 硬く脆いスチレン系樹脂の衝撃強度を改良するために、
ゴム状弾性体とスチレン系重合体とをブレンドしたり、
ゴム状弾性体の存在下にスチレン系単量体を重合させた
りして、ゴム変性スチレン系樹脂組成物を得ることは、
よく知られている。<Prior Art> In order to improve the impact strength of a hard and brittle styrene resin,
Blending rubber-like elastic material and styrene-based polymer,
To obtain a rubber-modified styrene-based resin composition by polymerizing a styrene-based monomer in the presence of a rubber-like elastic material,
well known.
しかしながら、ABS樹脂と比較すると、未だ衝撃強度は
低く、コストダウン、薄肉化志向という最近の市場の要
望を受けて、ABS樹脂と同程度の衝撃強度を持つゴム変
性スチレン系樹脂組成物の開発が強く望まれている。However, compared to ABS resin, impact strength is still low, and in response to recent market demands for cost reduction and thinning, development of a rubber-modified styrene resin composition having impact strength comparable to ABS resin has been developed. Strongly desired.
ゴム変性スチレン系樹脂組成物の衝撃強度改良方法とし
ては、例えば、特開昭57-172948号公報、特開昭57-1873
45号公報、特開昭57-187346号公報、特開昭60-166338号
公報および特開昭61-85461号公報などに記載されている
が、いずれも衝撃強度改良剤として、有機ポリシロキサ
ンを添加したり、２種のスチレン系単量体を共重合させ
たものであり、そのような衝撃強度改良方法では、添加
剤の購入や供給設備の設置、２種のスチレン系単量体の
貯蔵や配合設備にコストがかかるという欠点を有し、ま
た衝撃強度の改良の程度も十分とはいえない。Examples of the method for improving the impact strength of a rubber-modified styrene resin composition include, for example, JP-A-57-172948 and JP-A-57-1873.
No. 45, JP-A-57-187346, JP-A-60-166338, JP-A-61-85461 and the like, all, organic polysiloxane as an impact strength improver Addition or copolymerization of two styrenic monomers. In such impact strength improvement method, purchase of additives, installation of supply equipment, storage of two styrenic monomers It also has the drawback that the compounding equipment is costly, and the degree of impact strength improvement is not sufficient.
〈発明が解決しようとする課題〉 本発明者らは、かかる問題を解決し、衝撃強度改良剤を
添加することなしにゴム変性スチレン系樹脂組成物の衝
撃強度を著しく改良することを目的として鋭意研究の結
果、ゴム状弾性体の含有量、軟質成分の粒子径、粒子径
分布、膨潤度及び樹脂マトリックスの極限粘度を特定す
ることにより、著しい衝撃強度の改良が認められること
を見出し、本発明を完成するに至った。<Problems to be Solved by the Invention> The inventors of the present invention have diligently aimed at solving the above problems and remarkably improving the impact strength of a rubber-modified styrene resin composition without adding an impact strength improver. As a result of research, it was found that a remarkable improvement in impact strength was observed by specifying the content of the rubber-like elastic material, the particle size of the soft component, the particle size distribution, the swelling degree and the intrinsic viscosity of the resin matrix, and the present invention was found. Has been completed.
〈課題を解決するための手段〉 すなわち本発明は、 スチレン系樹脂がマトリックスを形成し、ゴム状弾性体
を含有してなる軟質成分が粒子状に分散しているゴム変
性スチレン系樹脂組成物において、 （Ａ）組成物中に分散した軟質成分粒子の平均粒子径が
0.2〜2.6μであり、 （Ｂ）該軟質成分の粒子径分布が0.8μ未満の範囲と、
0.8μ以上の範囲に各々極大値を持ち、 （Ｃ）ゴム状弾性体の含有量が該樹脂組成物の5.0wt％
以上10.0wt％以下であり、かつ （Ｄ）該軟質成分粒子のトルエン中における膨潤度〔S
I〕と、樹脂マトリックスの極限粘度〔η〕との比〔S
I〕／〔η〕が17〜23の範囲にあることを特徴とするゴ
ム変性スチレン系樹脂組成物に関するものである。<Means for Solving the Problems> That is, the present invention provides a rubber-modified styrene-based resin composition in which a styrene-based resin forms a matrix and a soft component containing a rubber-like elastic material is dispersed in particles. (A) The average particle size of the soft component particles dispersed in the composition is
0.2-2.6μ, (B) the particle size distribution of the soft component is less than 0.8μ,
Each has a maximum value in the range of 0.8 μ or more, and the content of (C) the rubber-like elastic body is 5.0 wt% of the resin composition.
Not less than 10.0 wt% and (D) the degree of swelling of the soft component particles in toluene [S
I] and the intrinsic viscosity [η] of the resin matrix [S]
I] / [η] is in the range of 17 to 23, and relates to a rubber-modified styrene resin composition.
本発明の目的を達成するには、上記のごとく、ゴム状弾
性体の含有量、軟質成分の平均粒子径、粒子径分布、膨
潤度と樹脂マトリックスの極限粘度との比をそれぞれ特
定することが必要である。In order to achieve the object of the present invention, as described above, the content of the rubber-like elastic body, the average particle size of the soft component, the particle size distribution, the ratio of the swelling degree and the intrinsic viscosity of the resin matrix can be specified respectively. is necessary.
以下さらに詳しく説明する。This will be described in more detail below.
本発明に用いるゴム変性スチレン系樹脂は、ゴム状弾性
体の存在下に、芳香族モノビニル単量体を重合せしめる
塊状重合方法、または塊状−懸濁２段重合法にて、製造
することができる。The rubber-modified styrene resin used in the present invention can be produced by a bulk polymerization method in which an aromatic monovinyl monomer is polymerized in the presence of a rubber-like elastic material, or a bulk-suspension two-step polymerization method. .
芳香族モノビニル単量体としては、スチレンが一般的で
はあるが、ｏ−メチルスチレン、ｍ−メチルスチレン、
ｐ−メチルスチレン等のアルキル置換スチレンも使用で
きる。Although styrene is generally used as the aromatic monovinyl monomer, o-methylstyrene, m-methylstyrene,
Alkyl-substituted styrenes such as p-methylstyrene can also be used.
またゴム状弾性体としては、ポリブタジエン、スチレン
−ブタジエン共重合体類、エチレン−プロピレン系共重
合体類、エチレン−プロピレン−非共役ジエンの三元共
重合体類、イソプレン重合体類、スチレン−イソプレン
共重合体類が使われるが、その中でも、ポリブタジエン
が最も好ましく使われる。ポリブタジエンとしては、シ
ス含有率の高いハイシスポリブタジエン、シス含有率の
低いローシスポリブタジエンともに用いることができ
る。Examples of the rubber-like elastic material include polybutadiene, styrene-butadiene copolymers, ethylene-propylene copolymers, ethylene-propylene-nonconjugated diene terpolymers, isoprene polymers, and styrene-isoprene. Copolymers are used, and among them, polybutadiene is most preferably used. As the polybutadiene, both high cis polybutadiene having a high cis content and low cis polybutadiene having a low cis content can be used.
本発明における、ゴム変性スチレン系樹脂組成物は、軟
質成分が粒子状に分散しており、該軟質成分の平均粒子
径は0.2〜2.6μの範囲、好ましくは0.4〜2.3μの範囲に
あることが必要である。該平均粒子径が0.2μよりも小
さくても、2.6μより大きくても衝撃強度の改良効果は
低下する。In the present invention, the rubber-modified styrene resin composition, the soft component is dispersed in the form of particles, the average particle size of the soft component is in the range of 0.2 ~ 2.6μ, preferably 0.4 ~ 2.3μ is necessary. Even if the average particle size is smaller than 0.2 μ or larger than 2.6 μ, the effect of improving impact strength decreases.
ここで云う平均粒子径とは、ゴム変性スチレン系樹脂の
超薄切片の透過型電子顕微鏡写真を撮影し、写真中の軟
質成分粒子500個の粒子径を測定して次式により算出し
たものである。The average particle size referred to here is a value calculated by the following formula by taking a transmission electron micrograph of an ultrathin section of a rubber-modified styrene resin and measuring the particle size of 500 soft component particles in the photo. is there.
ここでniは粒子径Diの軟質成分粒子の個数である。 Here, n i is the number of soft component particles having a particle diameter D i .
また、本発明において（Ｂ）該軟質成分粒子の粒子径分
布は、0.8μ未満の範囲と0.8μ以上の範囲、好ましくは
0.5μ以下の範囲と3.0μ以上の範囲に各々別々の極大値
を持つことが必要である。粒子径分布の極大値がただ１
つであったり、極大値が上記のいずれかの範囲だけにあ
る場合には、衝撃強度の改良効果が認められないか、ま
たは小さなものになる。Further, in the present invention, (B) the particle size distribution of the soft component particles is in the range of less than 0.8 μ and in the range of 0.8 μ or more, preferably
It is necessary to have separate maximum values in the range of 0.5μ or less and in the range of 3.0μ or more. Maximum value of particle size distribution is only 1
If the maximum value is in any of the above ranges, the effect of improving the impact strength is not recognized or becomes small.
ここで云う粒子径分布は、平均粒子径測定時のni、Di値
から得られる分布であるが、微細な粒子の分布を測定す
る特別な分析装置、例えばコールターカウンターのごと
き装置を電子顕微鏡写真による測定値との差を考慮に入
れて、使用しても良い。The particle size distribution mentioned here is a distribution obtained from the n i and D i values when measuring the average particle size, but a special analyzer for measuring the distribution of fine particles, for example, a device such as a Coulter counter, is used as an electron microscope. It may be used in consideration of the difference from the measured value by the photograph.
本発明において特定された軟質成分の平均粒子径及び粒
子径分布は、重合工程における攪拌強度、重合温度、重
合開始剤や連鎖移動剤の量を変更することや重合の進ん
だ重合液の一部を単量体にフィードバックしたり、ある
いは重合槽を２つ設け、重合度の異なる重合液を所定量
抜き取って混合した後、重合を完成させる等の方法によ
り調節することができる。The average particle size and particle size distribution of the soft component specified in the present invention, stirring strength in the polymerization step, the polymerization temperature, by changing the amount of the polymerization initiator and the chain transfer agent or a part of the polymerization liquid advanced polymerization Can be fed back to the monomer, or two polymerization tanks can be provided, and a predetermined amount of a polymerization liquid having a different polymerization degree can be withdrawn and mixed, and then the polymerization can be completed.
また、軟質成分の平均粒子径、粒子径分布の異なる２種
以上のゴム変性スチレン系樹脂を所定量混合することに
より、上記の特定の平均粒子径、粒子径分布を得ること
も可能である。It is also possible to obtain the above-mentioned specific average particle size and particle size distribution by mixing a predetermined amount of two or more rubber-modified styrenic resins having different average particle sizes and particle size distributions of the soft component.
また、樹脂組成物中に含有されるゴム状弾性体の量は、
5.0wt％以上、10.0wt％以下、好ましくは、6.0wt％以上
9.0wt％以下に調節しなければならない。ゴム状弾性体
含有量が5.0wt％未満の場合には、衝撃強度の改良効果
は小さなものとなるか又は発現しない。Further, the amount of the rubber-like elastic body contained in the resin composition is
5.0 wt% or more and 10.0 wt% or less, preferably 6.0 wt% or more
It must be adjusted to 9.0 wt% or less. When the content of the rubber-like elastic material is less than 5.0 wt%, the impact strength improving effect is small or does not appear.
ゴム状弾性体含有量が10.0wt％を越えると、該樹脂組成
物の耐熱性や剛性が低下し、機能材料としては、使いに
くいものとなる。When the content of the rubber-like elastic material exceeds 10.0 wt%, the heat resistance and rigidity of the resin composition are lowered, and it becomes difficult to use as a functional material.
さらに、軟質成分粒子のトルエン中での膨潤度〔SI〕と
ゴム状弾性体を除去した樹脂マトリックスの極限粘度
〔η〕との比〔SI〕／〔η〕が17〜23、好ましくは19〜
22の範囲にあることが必要である。〔SI〕／〔η〕が17
より小さくても、23より大きくても、衝撃強度の改良効
果は認められないか、または小さなものとなる。Furthermore, the ratio [SI] / [η] of the swelling degree [SI] of the soft component particles in toluene and the intrinsic viscosity [η] of the resin matrix from which the rubber-like elastic material is removed is 17 to 23, preferably 19 to
It must be in the range of 22. [SI] / [η] is 17
If it is smaller or larger than 23, the effect of improving the impact strength is not recognized or becomes small.
本発明で云う膨潤度〔SI〕とは、次の方法により測定さ
れる。すなわち、樹脂組成物1.0grを室温において、ト
ルエン50mlに溶解し、不溶のゲル分を遠心分離にて沈
澱、回収する。次に該ゲル分を溶液のデカンテーション
によって単離し、湿った状態で秤量する。その後乾燥
し、再秤量する。The degree of swelling [SI] referred to in the present invention is measured by the following method. That is, 1.0 gr of the resin composition is dissolved in 50 ml of toluene at room temperature, and the insoluble gel is precipitated and collected by centrifugation. The gel content is then isolated by decantation of the solution and weighed in the wet state. Then dry and reweigh.
軟質成分の湿潤重量をW1（ゲル分）、乾燥重量をW2とす
ると膨潤度〔SI〕は、次式によって定義される。When the wet weight of the soft component is W 1 (gel content) and the dry weight is W 2 , the swelling degree [SI] is defined by the following equation.
膨潤度〔SI〕は、値が大きくなるほど軟質成分の架橋度
が小さく、やわらかいと考えられる。 It is considered that the larger the swelling degree [SI], the softer the crosslinking degree of the soft component and the softer it is.
また、樹脂マトリックスの極限粘度〔η〕は、樹脂成分
0.5grをメチルエチルケトン／メタノール＝10/1溶液50m
lに溶解し、遠心分離によって不溶のゲル分を沈澱させ
た後、上澄液をメタノール１に移し、樹脂成分を再沈
澱させる。濾過後、乾燥させた沈澱物100mgを精秤し、5
0mlのトルエンに溶解し、30℃の温度でウベローデ型毛
管粘度計を使って測定した値である。極限粘度〔η〕は
値が大きいほど樹脂マトリックスの分子量が大きくなる
と考えられる。The intrinsic viscosity [η] of the resin matrix is
0.5gr methyl ethyl ketone / methanol = 10/1 solution 50m
It is dissolved in 1 and the insoluble gel is precipitated by centrifugation, and the supernatant is transferred to methanol 1 to reprecipitate the resin component. After filtration, weigh 100 mg of the dried precipitate and weigh 5
It is a value measured by dissolving it in 0 ml of toluene and using an Ubbelohde-type capillary viscometer at a temperature of 30 ° C. It is considered that the larger the intrinsic viscosity [η], the larger the molecular weight of the resin matrix.
以下に実施例を示すが、本発明は実施例のみに限定され
るものではない。Examples will be shown below, but the present invention is not limited to these examples.
〈実施例〉 実施例及び比較例に示されたアイゾット衝撃強度は、JI
S K7110に基づいて測定されたものである。<Example> The Izod impact strength shown in Examples and Comparative Examples is JI
It was measured based on S K7110.
実施例−１ 軟質成分の平均粒子径0.2μのゴム変性ポリスチレン
（以下HIPSと略す）と平均粒子径4.9μのHIPSを90/10に
混合した後、射出成形した。この試料の膨潤度と樹脂マ
トリックスの粘度の比（以下〔SI〕／〔η〕と略す）は
20.7であり、アイゾット衝撃強度は11.4kg・cm/cmもの
高い値を示した。Example-1 A rubber-modified polystyrene (hereinafter, abbreviated as HIPS) having an average particle diameter of 0.2 µ as a soft component and HIPS having an average particle diameter of 4.9 µ were mixed in 90/10 and injection-molded. The ratio of the swelling degree of this sample and the viscosity of the resin matrix (hereinafter abbreviated as [SI] / [η]) is
It was 20.7, and the Izod impact strength was as high as 11.4 kg · cm / cm.
実施例−２ 軟質成分の平均粒子径0.2μのHIPSと平均粒子径4.9μの
HIPSを75/25に混合した後、射出成形した。この試料の
〔SI〕／〔η〕は19.5であり、アイゾット衝撃強度は1
1.3kg・cm/cmもの高い値を示した。Example-2 A soft component having an average particle size of 0.2 μm of HIPS and an average particle size of 4.9 μm
HIPS were mixed to 75/25 and then injection molded. The [SI] / [η] of this sample is 19.5, and the Izod impact strength is 1
The value was as high as 1.3 kg · cm / cm.
実施例−３ 軟質成分の平均粒子径0.2μのHIPSと平均粒子径4.2μの
HIPSを50/50に混合した後、射出成形した。この試料の
〔SI〕／〔η〕は20.3であり、アイゾット衝撃強度は1
1.1kg・cm/cmもの高い値を示した。Example-3 HIPS having an average particle size of 0.2μ of the soft component and an average particle size of 4.2μ
HIPS was mixed 50/50 and then injection molded. The [SI] / [η] of this sample is 20.3, and the Izod impact strength is 1
The value was as high as 1.1 kg · cm / cm.
比較例−１ 軟質成分の平均粒子径0.2μのHIPSと平均粒子径4.2μの
HIPSを5/95に混合した後、射出成形した。この試料の平
均粒子径は4.0μであり、〔SI〕／〔η〕は19.2である
にもかかわらず、アイゾット衝撃強度は8.1kg・cm/cmと
低い値になった。Comparative Example-1 HIPS with an average particle size of 0.2μ and a average particle size of 4.2μ of the soft component
HIPS was mixed at 5/95 and then injection molded. The average particle size of this sample was 4.0 μ, and although the [SI] / [η] was 19.2, the Izod impact strength was as low as 8.1 kg · cm / cm.
比較例−２ 軟質成分の平均粒子径1.6μのHIPSを射出成形した。成
形後の試料の〔SI〕／〔η〕が20.6であるにもかかわら
ず、粒子径分布の極大値が１つであるために、アイゾッ
ト衝撃強度は7.3kg・cm/cmと低い値になった。Comparative Example-2 HIPS having an average particle diameter of the soft component of 1.6 µ was injection-molded. Even though the [SI] / [η] of the molded sample is 20.6, the Izod impact strength is as low as 7.3 kg · cm / cm due to the single maximum particle size distribution. It was
比較例−３ 軟質成分の平均粒子径1.0μのHIPSと平均粒子径1.6μの
HIPSを25/75に混合した後、射出成形した。Comparative Example-3 HIPS with an average particle size of 1.0μ of the soft component and with an average particle size of 1.6μ
After mixing HIPS to 25/75, it was injection molded.
この試料の平均粒子径は1.5μ、〔SI〕／〔η〕は19.4
であるにもかかわらず、粒子径分布の極大値が0.8μ以
上の範囲だけにあるため、アイゾット衝撃強度は7.4kg
・cm/cmと低い値になった。The average particle size of this sample is 1.5μ, and [SI] / [η] is 19.4
However, since the maximum value of the particle size distribution is only in the range of 0.8 μ or more, the Izod impact strength is 7.4 kg.
・ Low value of cm / cm.
比較例−４ 軟質成分の平均粒子径0.2μのと平均粒子径1.0μのHIPS
を10/90に混合した後、射出成形した。この試料の平均
粒子径は0.9μ、粒子径分布の極大値が、0.8μ未満と0.
8μ以上の範囲に分かれているにもかかわらず、〔SI〕
／〔η〕が16.5と小さいためにアイゾット衝撃強度は7.
0kg・cm/cmと低い値を示した。Comparative Example-4 HIPS with an average particle size of 0.2μ and an average particle size of 1.0μ for the soft component
Was mixed at 10/90 and injection molded. The average particle size of this sample is 0.9μ, and the maximum value of the particle size distribution is less than 0.8μ and 0.
Despite being divided into a range of 8μ or more, [SI]
/ [Η] is as small as 16.5, so Izod impact strength is 7.
The value was as low as 0 kg · cm / cm.
実施例及び比較例をまとめると表−１のようになる。Table 1 summarizes the examples and comparative examples.
実施例−４〜５、比較例−５〜６ 実施例−１で用いた、軟質成分の平均粒子径0.2μのHIP
Sと平均粒子径4.9μのHIPSを90/10に混合した樹脂組成
物と同一の極限粘度を有する、ゴム状弾性体を含有して
いないポリスチレン樹脂（以下GPPSと略す）とを90/10
〜50/50の比率になるように混合した後、射出成形し
た。これらの試料の〔SI〕／〔η〕、アイゾット衝撃強
度の測定結果を表−２に示す。Examples-4 to 5 and Comparative Examples-5 to 6 HIP having an average particle diameter of 0.2 μ of the soft component used in Example-1.
Polystyrene resin (hereinafter abbreviated as GPPS) containing 90% of S and HIPS having an average particle size of 4.9μ and having the same intrinsic viscosity as the resin composition of 90/10
After mixing in a ratio of -50/50, the mixture was injection molded. Table 2 shows the measurement results of [SI] / [η] and Izod impact strength of these samples.
〈発明の効果〉 本発明の樹脂組成物は、きわめて高い衝撃強度を有し、
これまでABS樹脂が使用されてきた電気機器のハウジン
グあるいは各種容器などにABS樹脂の代替品として使用
でき、コストダウンにかかわる経済的価値は、きわめて
大であると云える。<Effect of the Invention> The resin composition of the present invention has extremely high impact strength,
It can be said that the ABS resin can be used as a substitute for the ABS resin in the housings of electric equipment or various containers where the ABS resin has been used so far, and the economic value for cost reduction is extremely large.
Claims (1)
ゴム状弾性体を含有してなる軟質成分が粒子状に分散し
ているゴム変性スチレン系樹脂組成物において、 （Ａ）組成物中に分散した軟質成分粒子の平均粒子径が
0.2〜2.6μであり、 （Ｂ）該軟質成分の粒子径分布が0.8μ未満の範囲と、
0.8μ以上の範囲に各々極大値を持ち、 （Ｃ）ゴム状弾性体の含有量が該樹脂組成物の5.0wt％
以上10.0wt％以下であり、かつ （Ｄ）該軟質成分粒子のトルエン中における膨潤度〔S
I〕と、樹脂マトリックスの極限粘度〔η〕との比〔S
I〕／〔η〕が17〜23の範囲にあることを特徴とするゴ
ム変性スチレン系樹脂組成物。1. A styrene resin forms a matrix,
In a rubber-modified styrenic resin composition in which a soft component containing a rubber-like elastic material is dispersed in particles, (A) the average particle size of the soft component particles dispersed in the composition is
0.2-2.6μ, (B) the particle size distribution of the soft component is less than 0.8μ,
Each has a maximum value in the range of 0.8 μ or more, and the content of (C) the rubber-like elastic body is 5.0 wt% of the resin composition.
Not less than 10.0 wt% and (D) the degree of swelling of the soft component particles in toluene [S
I] and the intrinsic viscosity [η] of the resin matrix [S]
A rubber-modified styrenic resin composition characterized in that I] / [η] is in the range of 17 to 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63179988A JPH0684461B2 (en) | 1987-07-23 | 1988-07-18 | Rubber-modified styrene resin composition |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18528187 | 1987-07-23 | ||
| JP62-185281 | 1987-07-23 | ||
| JP63179988A JPH0684461B2 (en) | 1987-07-23 | 1988-07-18 | Rubber-modified styrene resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01198651A JPH01198651A (en) | 1989-08-10 |
| JPH0684461B2 true JPH0684461B2 (en) | 1994-10-26 |
Family
ID=26499671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63179988A Expired - Lifetime JPH0684461B2 (en) | 1987-07-23 | 1988-07-18 | Rubber-modified styrene resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0684461B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1518412A (en) * | 1975-05-15 | 1978-07-19 | Labofina Sa | High-impact polystyrene and process for the production thereof |
| US4214056A (en) * | 1978-05-19 | 1980-07-22 | Monsanto Company | Method for preparing a monoalkenyl aromatic polyblend having a dispersed rubber phase as particles with a bimodal particle size distribution |
| DE3035570A1 (en) * | 1980-09-20 | 1982-05-06 | Basf Ag, 6700 Ludwigshafen | IMPACT RESISTANT THERMOPLASTIC SHAPE |
| JPS60192755A (en) * | 1984-03-15 | 1985-10-01 | Asahi Chem Ind Co Ltd | Rubber-modified styrene resin composition for thin- walled molding |
-
1988
- 1988-07-18 JP JP63179988A patent/JPH0684461B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| ＪＯＵＲＮＡＬＯＦＡＰＰＬＩＥＤＰＯＬＹＭＥＲＳＣＩＥＮＣＥ第２０巻第２２８５−２２９５ページ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01198651A (en) | 1989-08-10 |
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