JPH01230656A - Rubber-modified styrene resin composition - Google Patents
Rubber-modified styrene resin compositionInfo
- Publication number
- JPH01230656A JPH01230656A JP25155388A JP25155388A JPH01230656A JP H01230656 A JPH01230656 A JP H01230656A JP 25155388 A JP25155388 A JP 25155388A JP 25155388 A JP25155388 A JP 25155388A JP H01230656 A JPH01230656 A JP H01230656A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- less
- particle size
- particles
- resin composition
- 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.)
- Pending
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 18
- 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 abstract description 77
- 238000009826 distribution Methods 0.000 claims abstract description 22
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 229920001890 Novodur Polymers 0.000 claims description 13
- 150000003440 styrenes Chemical class 0.000 claims description 3
- 239000000178 monomer Substances 0.000 abstract description 5
- 239000005062 Polybutadiene Substances 0.000 abstract description 4
- 229920001971 elastomer Polymers 0.000 abstract description 4
- 229920002857 polybutadiene Polymers 0.000 abstract description 4
- 125000003118 aryl group Chemical group 0.000 abstract description 3
- 238000012662 bulk polymerization Methods 0.000 abstract description 3
- 239000000806 elastomer Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 2
- 238000010557 suspension polymerization reaction Methods 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 238000006116 polymerization reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000013013 elastic material Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001955 polyphenylene ether Polymers 0.000 description 2
- -1 polysiloxane Polymers 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- JZHGRUMIRATHIU-UHFFFAOYSA-N 1-ethenyl-3-methylbenzene Chemical group CC1=CC=CC(C=C)=C1 JZHGRUMIRATHIU-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
- 238000003917 TEM image Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 229920005669 high impact polystyrene Polymers 0.000 description 1
- 239000004797 high-impact polystyrene Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 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
Abstract
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 Field of Application> The present invention relates to a rubber-modified styrenic resin composition with improved impact strength.
さらに詳しくは、強靭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。）の粒子径分布を特定することによっ
て、衝撃強度が著しく改良され、へＢＳ樹脂代替品とし
て使用可能な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, by specifying the content of the rubber-like elastic material used as a toughening agent and the particle size distribution of the soft component containing the rubber-like elastic material (hereinafter referred to as the "soft component"), impact strength can be significantly improved. The present invention relates to a rubber-modified styrenic resin composition that has been improved and can be used as a substitute for BS resin.
〈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、
ゴム状弾性体をスチレン系単量体に溶解した後、重合し
て、ゴム変性スチレン系樹脂組成物にすることは、よ（
知られている。<Prior art> In order to improve the impact strength of hard and brittle styrene resin,
Blending rubber-like elastic material and styrene polymer,
It is a good idea to dissolve a rubber-like elastic body in a styrenic monomer and then polymerize it to make a rubber-modified styrenic resin composition.
Are known.
しかしながら、ＡＢＳ樹脂と比較すると未だ衝撃強度が
低く、該ゴム変性スチレン系樹脂の耐衝撃強度の改良の
ために、特開昭５７−１７０９４９号、特開昭５７−１
７２９４８号、特開昭５７−１８７３４５号、特開昭６
１−８５４６１号等では、有機ポリシロキサンが添加さ
れたり、特開昭４９−３５４号、特開昭５９−６６４１
２号等では、ボリフェニレンエーテノベアクリロニトリ
ルやα−メチルスチレンとの共重合が、試みられている
。However, the impact strength is still low compared to ABS resin, and in order to improve the impact strength of the rubber-modified styrene resin, Japanese Patent Application Laid-Open Nos. 57-170949 and 57-1
No. 72948, JP-A-57-187345, JP-A-6
1-85461 etc., organic polysiloxane is added;
In No. 2 and the like, attempts have been made to copolymerize polyphenylene ether with acrylonitrile and α-methylstyrene.
しかしながら、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、ポリフェニレンエーテル、
アクリロニトリルやα−メチルスチレン等の貯蔵や配合
設備にコストがかかり、またスチレン系樹脂特有のすぐ
れた加工性を損うという欠点が生じる。However, such impact strength improvement methods require purchasing additives, installing supply equipment, polyphenylene ether,
There are disadvantages in that storage and compounding equipment for acrylonitrile, α-methylstyrene, etc. are costly, and the excellent processability characteristic of styrenic resins is impaired.
〈発明が解決しようとする課題〉
本発明者らは、衝撃強度改良剤の添加やスチレン系単１
体と共重合可能な単量体を重合させて連続相を形成させ
るという手段をとることなしに、ゴム変性スチレン系樹
脂の衝撃強度を著しく改良させる方法を鋭意研究した結
果、ゴム状弾性体の含有量と軟質成分の粒子径分布を特
定することにより、著しい衝撃強度の改良が認められる
ことを見い出し、本発明を完成するに至った。<Problems to be Solved by the Invention> The present inventors have proposed the addition of impact strength modifiers and
As a result of extensive research into a method for significantly improving the impact strength of rubber-modified styrenic resins without having to form a continuous phase by polymerizing monomers that can be copolymerized with rubber-like elastomers, we have found that By specifying the content and particle size distribution of the soft component, it was discovered that a significant improvement in impact strength was observed, and the present invention was 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）ゴム状弾性体の含有量が、該樹脂組成物の５、９
ｗｔ％以上、１０． Ｑｗｔ％以下であり、かつ、（Ｂ
）該軟質成分の粒子径が、
（ａ） 粒子径０．５μ以下の粒子が３０％以上７０
％未満であり、
ら）粒子径１．０μ以下の粒子が４０％以上７５％未満
であり、
（ｃ） 粒子径２．５μ以上の粒子が２０％以上５５
％未満である
粒子径分布をもつ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り、その目的とするところ
は、衝撃強度が著しく改良されたゴム変性スチレン系樹
脂組成物を提供することにある。<Means for Solving the Problems> That is, the present invention provides a rubber-modified styrenic resin composition in which a styrene resin forms a matrix and a soft component containing a rubber-like elastic body is dispersed in the form of particles. , (A) The content of the rubbery elastic body is 5, 9 in the resin composition.
wt% or more, 10. Qwt% or less, and (B
) The particle size of the soft component is (a) 30% or more of particles with a particle size of 0.5μ or less70
(a) 40% or more but less than 75% of particles with a particle size of 1.0μ or less; (c) 20% or more of particles with a particle size of 2.5μ or more55
The present invention relates to a rubber-modified styrenic resin composition characterized by having a particle size distribution of less than There is a particular thing.
本発明の目的を達成するには、これらの要件をすべて満
足する必要がある。In order to achieve the purpose of the present invention, it is necessary to satisfy all of these requirements.
本発明に用いるゴム変性スチレン系樹脂組成物は、ゴム
状弾性体を芳香族モノビニル単量体に溶解した後、塊状
重合又は塊状−懸濁二段重合法によって製造される。The rubber-modified styrenic resin composition used in the present invention is produced by dissolving a rubbery elastomer in an aromatic monovinyl monomer and then performing bulk polymerization or bulk-suspension two-stage polymerization.
芳香族モノビニル単量体としては、スチレンが一１２的
ではあるが０−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利用で
きる。Examples of aromatic monovinyl monomers include styrene, 0-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、ポリブタジェン、スチレ
ン−ブタジェン共重合体類、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ェン
が最も好ましく使われる。Examples of rubber-like elastic bodies include polybutadiene, styrene-butadiene copolymers, ethylene-propylene copolymers, ethylene-propylene-nonconjugated diene terpolymers, isoprene polymers, and styrene-butadiene copolymers. Isoprene copolymers are used, of which polybutadiene is most preferably used.
ポリブタジェンとしては、シス含有率の高いハイシスポ
リブタジェン、シス含有率の低いローシスポリブタジェ
ンともに用いることができる。As the polybutadiene, both high-cis polybutadiene with a high cis content and low-cis polybutadiene with a low cis content can be used.
本発明の目的を達成するためには、（Ａ） ゴム変性ス
チレン系樹脂組成物中に含有されるゴム状弾性体の量を
５．９ｗｔ％以上、１０． Ｑｗｔ％以下、好ましくは
、５．９ｗｔ％以上、９．Ｑｗｔ％以下に調節しなけれ
ばならない。ゴム状弾性体含有量が５．９ｗｔ％未滴の
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。ゴム状弾性体含有量が１０． Ｑｗｔ％
を越えると、該樹脂組成物の耐熱性や剛性が低下し、機
能材料として使いにくいものとなる。In order to achieve the object of the present invention, (A) the amount of rubber-like elastic body contained in the rubber-modified styrenic resin composition should be 5.9 wt% or more, 10. Qwt% or less, preferably 5.9wt% or more,9. It must be adjusted to below Qwt%. When the rubber-like elastic material content is less than 5.9 wt%, the effect of improving impact strength becomes small or does not appear. Rubber-like elastic material content is 10. Qwt%
If it exceeds this amount, the heat resistance and rigidity of the resin composition will decrease, making it difficult to use as a functional material.
また、（Ｂ）本発明によるゴム変性スチレン系樹脂にお
いて、軟質成分の粒子径分布は、（ａ） ０．５μ以
下の粒子は３０％以上７０％未満の範囲でなければなら
ない。該粒子径０．５μ以下の粒子が３０％未満、ある
いは７０％以上の場合には、衝撃強度の改良効果は、発
現上ないかまたは小さなものになる。In addition, (B) in the rubber-modified styrenic resin according to the present invention, the particle size distribution of the soft component must be such that (a) particles of 0.5 μ or less must be in the range of 30% or more and less than 70%; If the proportion of particles with a particle size of 0.5 μm or less is less than 30%, or more than 70%, the effect of improving impact strength will be negligible or small.
また（ｂ）軟質成分の粒子径１．０μ以下の粒子は４０
％以上、７５％未満の範囲でなければならない。該粒子
径１．０μ以下の粒子が４０％未満、あるいは７５％以
上の場合には、衝撃強度の改良効果は、発現しないかま
たは小さなものになる。In addition, (b) particles with a particle size of 1.0μ or less of the soft component are 40
% or more and less than 75%. If the proportion of particles with a particle diameter of 1.0 μm or less is less than 40% or 75% or more, the effect of improving impact strength will not be exhibited or will be small.
さらに、（ｃ）軟質成分の粒子径２．５μ以上の粒子は
、２０％以上５５％未満の範囲でなければならない。該
粒子径２．５μ以上の粒子が２０％未満あるいは、５５
％以上の場合には、衝撃強度の改良効果は、発現しない
かまたは小さなものになる。Furthermore, the proportion of particles having a particle size of 2.5 μm or more in the soft component (c) must be in the range of 20% or more and less than 55%. The particle size of 2.5 μ or more is less than 20%, or 55%
% or more, the effect of improving impact strength will not be exhibited or will be small.
また、軟質成分の平均粒子径は、好ましくは、２．６μ
以下である。平均粒子径が２．６μを越えると、弾性率
や機械的強度の低下が起こるため、実用的には好ましく
ない。Further, the average particle diameter of the soft component is preferably 2.6μ
It is as follows. If the average particle diameter exceeds 2.6 μm, the elastic modulus and mechanical strength will decrease, which is not preferred for practical purposes.
なお、ここで云う軟質成分の粒子径とは、樹脂の超薄切
片の透過型電子顕微鏡写真をとり、写真中の任意に選ん
だ軟質成分粒子約１０００個の粒子径を測定して求めた
ものである。The particle size of the soft component referred to here is determined by taking a transmission electron micrograph of an ultra-thin section of the resin and measuring the particle size of approximately 1000 arbitrarily selected soft component particles in the photo. It is.
粒子径分布は、便宜上表−１のように級別し、使って算
出した。For convenience, the particle size distribution was classified and calculated as shown in Table 1.
また平均粒子径は、次式によって算出した。Moreover, the average particle diameter was calculated by the following formula.
ここでｎ、は粒子径りの軟質成分粒子の個数である。Here, n is the number of soft component particles of the particle diameter.
また、電子顕微鏡写真のゴム粒子は完全な円形ではない
ので、長手方向径ａと長平方向と直角なより算出した。Furthermore, since the rubber particles in the electron micrograph are not perfectly circular, the diameter a in the longitudinal direction was calculated based on the diameter a perpendicular to the elongated direction.
粒子径分布は、コールタ−カウンターの如き分析装置を
用いて測定しても良いが、その時には、電子顕微鏡写真
による測定値との差を考慮しなければならない。The particle size distribution may be measured using an analytical device such as a Coulter counter, but at that time, the difference from the value measured by an electron micrograph must be taken into consideration.
本発明において特定された軟質成分の粒子径分布は、重
合工程における攪拌強度、重合温度、重合開始剤や連鎖
移動剤の量を加減することや、重合の進んだ重合液の一
部を原料単量体にフィードバックしたり、あるいは、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 particle size distribution of the soft component specified in the present invention can be achieved by adjusting the stirring intensity, polymerization temperature, and amount of polymerization initiator and chain transfer agent in the polymerization process, or by controlling a portion of the polymerized solution as a raw material. It can be adjusted by feeding back to the polymer, or by taking out a predetermined amount of polymerization liquids having different degrees of polymerization, mixing them, and then completing the polymerization.
また、簡易的には、ゴム状弾性体の平均粒子径、粒子径
分布の異なる二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、本発明で特定した粒子径分布を
得ることもできる。Furthermore, simply, the particle size distribution specified in the present invention can be obtained by mixing a predetermined amount of two or more types of rubber-modified styrenic resins having different average particle sizes and particle size distributions of rubber-like elastic bodies. can.
〈実施例〉
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> Examples are shown below, but the present invention is not limited only to the examples.
実施例及び比較例に示されたアイゾツト衝撃強度はＪ
Ｉ Ｓ Ｋ７１１０に基づいて測定されたものである
。The Izod impact strength shown in Examples and Comparative Examples is J
Measured based on IS K7110.
実施例−■
軟質成分の粒子径分布が、０．５μ以下７１％、１．０
μ以下８０％、２．５μ以上１２％で、平均粒子径が０
，２μのゴム変性ポリスチレン（以下旧ＰＳと略す）グ
レードＡと粒子径分布が０．５μ以下Ｏ％、１．０μ以
下２，６％、２６５μ以上９３％で平均粒子径が４．９
μのＨＩＰＳグレードＢとを９０対１０の割合に混合し
た後、射出成形した。Example-■ Particle size distribution of soft component is 0.5μ or less 71%, 1.0
80% below μ, 12% above 2.5μ, and the average particle size is 0.
, 2μ rubber-modified polystyrene (hereinafter abbreviated as old PS) grade A and particle size distribution of 0.5μ or less, 2.6% of 1.0μ or less, 93% of 265μ or more, and the average particle size is 4.9.
After mixing with μ HIPS grade B in a ratio of 90:10, injection molding was performed.
この試料の軟質成分は、粒子径０．５μ以下６４％、１
．０μ以下７２％、２，５μ以上２０％の分布を持ち、
平均粒子径は０．７μであり、アイゾツト衝撃強度は、
１１．４ ｋｇ−ｃｍ／ｃｍもの高い値を示した。The soft components of this sample were 64% with a particle size of 0.5μ or less, 1
．． It has a distribution of 72% below 0μ and 20% above 2.5μ,
The average particle diameter is 0.7μ, and the Izod impact strength is:
It showed a high value of 11.4 kg-cm/cm.
実施例−２
実施例−１に使用した旧ＰＳグレードＡとグレードＢと
を７５対２５の割合に混合した後、射出成形した。Example 2 Old PS Grade A and Grade B used in Example 1 were mixed at a ratio of 75:25 and then injection molded.
この試料の軟質成分は、粒子径０．５μ以下５３％、１
．０μ以下６１％、２．５μ以上３２％の分布を持ち、
平均粒子径は１．４μであり、アイゾッ） １％撃強度
は、１１．１ ｋｇ−ｃｎ＋／ｃｍもの高い値を示シタ
。The soft components of this sample were 53% with a particle size of 0.5μ or less, 1
．． It has a distribution of 61% below 0μ and 32% above 2.5μ,
The average particle diameter is 1.4μ, and the 1% impact strength is as high as 11.1 kg-cn+/cm.
実施例−３
実施例−１に使用した旧ＰＳグレードＡと粒子径分布が
０．５μ以下０％、１．０μ以下０．７％、２．５μ以
上８９％で、平均粒子径が４．２μの旧ＰＳグレードＣ
とを５０対５０の割合に混合した後、射出成形した。Example-3 Compared to the old PS grade A used in Example-1, the particle size distribution was 0% below 0.5μ, 0.7% below 1.0μ, 89% above 2.5μ, and the average particle size was 4. 2μ old PS grade C
After mixing in a ratio of 50:50, injection molding was performed.
この試料の軟質成分は、粒子径０．５μ以下３５％、１
．０μ以下４１％、２．５μ以上５０％の分布を持ち、
平均粒子径は２．２μであり、アイゾツト衝撃強度は、
１１．１ｋｇ−ｃｍ／ｃｍもの高い値ヲ示シタ。The soft components of this sample were 35% with a particle size of 0.5μ or less, 1
．． It has a distribution of 41% below 0μ and 50% above 2.5μ,
The average particle diameter is 2.2μ, and the Izod impact strength is:
It showed a high value of 11.1 kg-cm/cm.
比較例−１
実施例−１に使用した旧ＰＳグレードＡと粒子径分布が
０．５μ以下Ｏ％、１．０μ以下４７％、２．５μ以上
７％で、平均粒子径が１．０μの旧ＰＳグレードＤとを
６０対４０の割合に混合した後、射出成形した。Comparative Example-1 Compared to the old PS grade A used in Example-1, the particle size distribution was 0% below 0.5μ, 47% below 1.0μ, 7% above 2.5μ, and the average particle diameter was 1.0μ. After mixing with old PS grade D at a ratio of 60:40, injection molding was performed.
この試料の軟質成分は、粒子径０．５μ以下４３％、１
．０μ以下６７％、２．５μ以上１０％の分布を持ち、
平均粒子径は０．５μであり、アイゾツト衝撃強度は、
６．８ｋｇ−ｃｍ／ｃｍと低かった。The soft components of this sample were 43% with a particle size of 0.5μ or less, 1
．． It has a distribution of 67% below 0μ and 10% above 2.5μ,
The average particle diameter is 0.5μ, and the Izod impact strength is:
It was as low as 6.8 kg-cm/cm.
比較例−２
実施例−３に使用した旧ＰＳグレードＣと比較例−１に
使用した旧ＰＳグレードＤとを１５対８５の割合に混合
した後、射出成形した。Comparative Example-2 Old PS Grade C used in Example-3 and Old PS Grade D used in Comparative Example-1 were mixed in a ratio of 15:85 and then injection molded.
この試料の軟質成分は、粒子径０．５μ以下０％、１．
０μ以下４０％、２．５μ以上２０％の分布を持ち、平
均粒子径は１．５μであり、アイゾツト衝撃強度は、８
．３ｋｇ−ｃｍ／ｃｍと低かった。The soft components of this sample had a particle size of 0.5μ or less, 0%, 1.
It has a distribution of 40% below 0μ and 20% above 2.5μ, the average particle size is 1.5μ, and the Izot impact strength is 8
．． It was as low as 3 kg-cm/cm.
比較例−３
実施例−１に使用した旧ＰＳグレードＡと、粒子径分布
が０．５μ以下６％、１．０μ以下１％、２．５μ以上
４５％で、平均粒子径が２．４μの旧ＰＳグレードＥと
を４５対５５の割合に混合した後、射出成形した。Comparative Example-3 Compared to the old PS grade A used in Example-1, the particle size distribution was 6% below 0.5μ, 1% below 1.0μ, 45% above 2.5μ, and the average particle size was 2.4μ. and old PS grade E in a ratio of 45:55, and then injection molded.
この試料の軟質成分は、粒子径０．５μ以下３２％、１
．０μ以下３７％、２．５μ以上３０％の分布を持ち、
平均粒子径は１，４μであり、アイゾツト衝撃強度は、
７．４ｋｇ−ｃｍ／ｃｍと低かった。The soft components of this sample were 32% with a particle size of 0.5μ or less, and 1
．． It has a distribution of 37% below 0μ and 30% above 2.5μ,
The average particle diameter is 1.4μ, and the Izod impact strength is:
It was as low as 7.4 kg-cm/cm.
実施例と比較例をまとめると表−２のようになる。Table 2 summarizes the examples and comparative examples.
実施例−４〜５、比較例−４〜５
実施例−１において製造したポリスチレン樹脂組成物に
該樹脂組成物と同じ極限粘度をもつポリスチレン樹脂（
以下ＧＰＰＳと略す）を旧ＰＳとＧＰＰＳが表−３に示
した割合になるように混合した後、射出成形した試料の
衝撃強度を測定した。結果を表＝３に示す。Examples 4 to 5, Comparative Examples 4 to 5 A polystyrene resin (having the same intrinsic viscosity as the resin composition) was added to the polystyrene resin composition produced in Example 1.
After mixing old PS and GPPS (hereinafter abbreviated as GPPS) at a ratio shown in Table 3, the impact strength of the injection molded sample was measured. The results are shown in Table 3.
〈発明の効果〉
以上述べたように、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、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。<Effects of the Invention> As described above, the resin composition of the present invention has extremely high impact strength and can be used as an alternative to ABS resin for housings of electrical equipment, various containers, etc. in which ABS resin has been used up to now. It can be said that the economic value associated with cost reduction is extremely large.
Claims (2)
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）ゴム状弾性体の含有量が、該樹脂組成物の５．０
ｗｔ％以上、１０．０ｗｔ％以下であり、かつ、 （Ｂ）該軟質成分の粒子径が、 （ａ）粒子径０．５μ以下の粒子が３０％以上７０％未
満であり、 （ｂ）粒子径１．０μ以下の粒子が４０％以上７５％未
満であり、 （ｃ）粒子径２．５μ以上の粒子が２０％以上５５％未
満である 粒子径分布をもつことを特徴とするゴム変性スチレン系
樹脂組成物。(1) In a rubber-modified styrenic resin composition in which a styrene resin forms a matrix and a soft component containing a rubbery elastic body is dispersed in particles, (A) Content of the rubbery elastic body However, 5.0 of the resin composition
wt% or more and 10.0wt% or less, and (B) the particle size of the soft component is (a) 30% or more and less than 70% of the particles have a particle size of 0.5 μ or less; (b) particles A rubber-modified styrene characterized by having a particle size distribution in which the proportion of particles with a diameter of 1.0μ or less is 40% or more and less than 75%, and (c) the proportion of particles with a particle diameter of 2.5μ or more is 20% or more and less than 55%. based resin composition.
項１記載のゴム変性スチレン系樹脂組成物。(2) The rubber-modified styrenic resin composition according to claim 1, wherein the soft component has an average particle diameter of 2.6 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25155388A JPH01230656A (en) | 1987-10-16 | 1988-10-04 | Rubber-modified styrene resin composition |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-262439 | 1987-10-16 | ||
| JP26243987 | 1987-10-16 | ||
| JP25155388A JPH01230656A (en) | 1987-10-16 | 1988-10-04 | Rubber-modified styrene resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01230656A true JPH01230656A (en) | 1989-09-14 |
Family
ID=26540241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25155388A Pending JPH01230656A (en) | 1987-10-16 | 1988-10-04 | Rubber-modified styrene resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01230656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100583524B1 (en) * | 1999-12-17 | 2006-05-24 | 제일모직주식회사 | High Impact Polystyrene Resin with Good Falling Dart Impact Prepared by Continuous Mass Polymerization process |
-
1988
- 1988-10-04 JP JP25155388A patent/JPH01230656A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100583524B1 (en) * | 1999-12-17 | 2006-05-24 | 제일모직주식회사 | High Impact Polystyrene Resin with Good Falling Dart Impact Prepared by Continuous Mass Polymerization process |
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