JPH08873B2 - Thermoplastic resin composition - Google Patents
Thermoplastic resin compositionInfo
- Publication number
- JPH08873B2 JPH08873B2 JP60177633A JP17763385A JPH08873B2 JP H08873 B2 JPH08873 B2 JP H08873B2 JP 60177633 A JP60177633 A JP 60177633A JP 17763385 A JP17763385 A JP 17763385A JP H08873 B2 JPH08873 B2 JP H08873B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- chain length
- copolymer
- average chain
- methylstyrene
- 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 - Fee Related
Links
- 239000011342 resin composition Substances 0.000 title claims description 6
- 229920005992 thermoplastic resin Polymers 0.000 title claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 33
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 16
- -1 aromatic vinyl compound Chemical class 0.000 claims description 13
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 claims description 8
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 claims description 3
- 229940125810 compound 20 Drugs 0.000 claims 1
- JAXFJECJQZDFJS-XHEPKHHKSA-N gtpl8555 Chemical compound OC(=O)C[C@H](N)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1CCC[C@@H]1C(=O)N[C@H](B1O[C@@]2(C)[C@H]3C[C@H](C3(C)C)C[C@H]2O1)CCC1=CC=C(F)C=C1 JAXFJECJQZDFJS-XHEPKHHKSA-N 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 10
- 238000006116 polymerization reaction Methods 0.000 description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007696 Kjeldahl method Methods 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 description 3
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 3
- AYMDJPGTQFHDSA-UHFFFAOYSA-N 1-(2-ethenoxyethoxy)-2-ethoxyethane Chemical compound CCOCCOCCOC=C AYMDJPGTQFHDSA-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000010556 emulsion polymerization method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 229940078499 tricalcium phosphate Drugs 0.000 description 2
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OJASMMNWWIJWFK-KUSCCAPHSA-N (3r)-1-[[4-[[(3r)-3-(diethylcarbamoyl)piperidin-1-yl]methyl]phenyl]methyl]-n,n-diethylpiperidine-3-carboxamide;dihydrobromide Chemical compound Br.Br.C1[C@H](C(=O)N(CC)CC)CCCN1CC(C=C1)=CC=C1CN1C[C@H](C(=O)N(CC)CC)CCC1 OJASMMNWWIJWFK-KUSCCAPHSA-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
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- RHZIVIGKRFVETQ-UHFFFAOYSA-N butyl 2-methylpropaneperoxoate Chemical compound CCCCOOC(=O)C(C)C RHZIVIGKRFVETQ-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 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） 本発明は透明性、耐熱性にすぐれかつ高強度な熱可塑
性樹脂組成物に関する。TECHNICAL FIELD The present invention relates to a thermoplastic resin composition having excellent transparency and heat resistance and high strength.
（従来の技術） 従来からα−メチルスチレン−アクリロニトリル共重
合体については多くの研究が行なわれており、一部乳化
重合法によつて工業的に製造され、ABS樹脂の耐熱改良
材として使用されいる。(Prior Art) Conventionally, much research has been conducted on α-methylstyrene-acrylonitrile copolymers, which are partially industrially produced by an emulsion polymerization method and used as a heat resistance improving material for ABS resin. There is.
α−メチルスチレン−アクリロニトリル共重合体は懸
濁重合では共重合速度が遅いため、重合速度が速く、高
分子量の重合体を得られ易い乳化重合法によつて工業化
されているが、乳化剤や塩析剤の混入により透明な成形
材料としては不適であるという欠点を有している。Since α-methylstyrene-acrylonitrile copolymer has a slow copolymerization rate in suspension polymerization, it has been industrialized by an emulsion polymerization method in which the polymerization rate is high and a high molecular weight polymer is easily obtained. It has a drawback that it is unsuitable as a transparent molding material due to the inclusion of a dispersant.
又α−メチルスチレン−アクリロニトリル共重合体は
耐熱性は高いが、ミクロ構造として剛直な分子鎖を有し
ているので、材料として強度が不足している。Further, the α-methylstyrene-acrylonitrile copolymer has high heat resistance, but since it has a rigid molecular chain as a microstructure, it lacks strength as a material.
（発明が解決しようとする問題点） 本発明はかかる欠点を解決したものであり、特定の連
鎖長を有する芳香族ビニル化合物とシアン化ビニル化合
物との共重合体を２種類特定な割合で配合することによ
り、透明性、耐熱性および高強度にすぐれた樹脂組成物
を提供するものである。(Problems to be Solved by the Invention) The present invention solves such a drawback, and two kinds of copolymers of an aromatic vinyl compound having a specific chain length and a vinyl cyanide compound are blended in a specific ratio. By doing so, a resin composition excellent in transparency, heat resistance and high strength is provided.
（問題点を解決するための手段） すなわち本発明はα−メチルスチレン65〜75重量％及
びアクリロニトリル25〜35重量％からなる共重合体で、
かつポリスチレンを基準とした数平均連鎖長が800〜160
0Åで、重量平均連鎖長（▲▼）と数平均連鎖長
（▲▼）の比（▲▼／▲▼）が1.5〜3.0で
ある共重合体（Ａ）55〜95重量％と、芳香族ビニル化合
物（α−メチルスチレンを除く）65〜80重量％及びシア
ン化ビニル化合物20〜35重量％からなる共重合体で、か
つポリスチレンを基準とした数平均連鎖長さが1000〜40
00Åで、重量平均連鎖長（▲▼）と数平均連鎖長
（▲▼）の比（▲▼／▲▼）が1.5〜3.0で
ある共重合体（Ｂ）45〜５重量％とからなる熱可塑性樹
脂組成物である。(Means for Solving the Problems) That is, the present invention is a copolymer consisting of 65-75 wt% α-methylstyrene and 25-35 wt% acrylonitrile,
And the number average chain length based on polystyrene is 800-160
55 to 95% by weight of a copolymer (A) having a ratio of weight average chain length (▲ ▼) to number average chain length (▲ ▼) (▲ ▼ / ▲ ▼) of 1.5 to 3.0 at 0Å, and aromatic A copolymer composed of 65 to 80% by weight of a vinyl compound (excluding α-methylstyrene) and 20 to 35% by weight of a vinyl cyanide compound, and having a number average chain length of 1000 to 40 based on polystyrene.
A heat composed of 45 to 5% by weight of copolymer (B) having a ratio of weight average chain length (▲ ▼) to number average chain length (▲ ▼) (▲ ▼ / ▲ ▼) of 1.5 to 3.0 at 00Å. It is a plastic resin composition.
以下本発明を具体的に説明する。 The present invention will be specifically described below.
（Ａ）成分であるα−メチルスチレン−アクリロニト
リル共重合体の連鎖長は、ポリスチレンを基準とした数
平均連鎖長が800〜1600Åである。数平均連鎖長が800Å
より短い共重合体を用いると、強度や耐熱性が低下し、
又、数平均連鎖長が1600Åより長い共重合体を用いる
と、実際に成形した成形品の残留歪が大きくなり成形品
の耐熱性の低下をもたらす結果となり、本発明の目的を
達することができない。The chain length of the α-methylstyrene-acrylonitrile copolymer which is the component (A) is such that the number average chain length based on polystyrene is 800 to 1600Å. Number average chain length is 800Å
If a shorter copolymer is used, strength and heat resistance will decrease,
Further, when a copolymer having a number average chain length of longer than 1600Å is used, the residual strain of the actually molded product becomes large, resulting in a decrease in heat resistance of the molded product, and the object of the present invention cannot be achieved. .
又α−メチルスチレン−アクリロニトリル共重合体の
重量平均連鎖長（▲▼）と数平均連鎖長（▲
▼）の比（▲▼／▲▼）は、1.5〜3.0の範囲で
ある。▲▼／▲▼が1.5より小さくても又3.0よ
り大きくても、耐熱性と成形性の両方に優れた性質を有
せしめることができない。α−メチルスチレン−アクリ
ロニトリル共重合体の組成は、α−メチルスチレン65〜
75重量％、アクリロニトリル25〜35重量％であり、α−
メチルスチレンの量が65重量％未満では、耐熱性を向上
させることは困難であり、又通常の重合方法では75重量
％を超えるとα−メチルスチレンの残存量体量が増加し
好ましくない。The weight average chain length (▲ ▼) and number average chain length (▲) of α-methylstyrene-acrylonitrile copolymer
The ratio (▲ ▼ / ▲ ▼) of ▼) is in the range of 1.5 to 3.0. Even if ▲ ▼ / ▲ ▼ is smaller than 1.5 or larger than 3.0, it is not possible to have excellent properties in both heat resistance and moldability. The composition of the α-methylstyrene-acrylonitrile copolymer is α-methylstyrene 65-
75% by weight, acrylonitrile 25-35% by weight, α-
If the amount of methylstyrene is less than 65% by weight, it is difficult to improve the heat resistance, and if it exceeds 75% by weight in the usual polymerization method, the amount of residual α-methylstyrene is increased, which is not preferable.
一方、アクリロニトリルの量が25重量％未満では共重
合が困難となり、満足な収率で共重合体を得ることが出
来ないし、35重量％を超えると著しく耐熱性の低下と色
調を悪化をまねき好ましくない。On the other hand, if the amount of acrylonitrile is less than 25% by weight, copolymerization becomes difficult, and a copolymer cannot be obtained in a satisfactory yield, and if it exceeds 35% by weight, heat resistance is significantly lowered and color tone is deteriorated, which is preferable Absent.
次に（Ｂ）成分である芳香族ビニル−シアン化ビニル
共重合体の連鎖長は、ポリスチレンを基準とした数平均
連鎖長が1000〜4000Åの範囲である、数平均連鎖長が10
00Åより短い共重合体を用いると、成形性は向上する
か、強度や耐熱性が低下し、又数平均連鎖長が4000Åよ
り長い共重合体を用いると、実際に成形した成形品の残
留歪が大きくなり、成形品の耐熱性の低下をもたらす結
果となり、本発明の目的を達することができない。又芳
香族ビニル−シアン化ビニル共重合体の重量平均連鎖長
（▲▼）と数平均連鎖長（▲▼）の比（▲
▼／▲▼）は1.5〜3.0の範囲である。Next, the chain length of the aromatic vinyl-vinyl cyanide copolymer which is the component (B) is such that the number average chain length is in the range of 1000 to 4000Å based on polystyrene, and the number average chain length is 10
If a copolymer shorter than 00Å is used, the moldability will be improved, or the strength and heat resistance will decrease, and if a copolymer with a number average chain length longer than 4000Å is used, the residual strain of the actually molded product will be reduced. Results in a decrease in heat resistance of the molded product, and the object of the present invention cannot be achieved. Further, the ratio of the weight average chain length (▲ ▼) to the number average chain length (▲ ▼) of the aromatic vinyl-vinyl cyanide copolymer (▲ ▼
▼ / ▲ ▼) is in the range of 1.5 to 3.0.
▲▼／▲▼が1.5より小さくても又3.0より大
きくても耐熱性と成形性の両方に優れた性質を有せしめ
ることは出来ない。Even if ▲ ▼ / ▲ ▼ is smaller than 1.5 or larger than 3.0, it is not possible to have excellent properties in both heat resistance and moldability.
本発明に使用する芳香族ビニル化合物とは、α−メチ
ルスチレン以外のスチレン系単量体である例えばスチレ
ン、ｏ−メチルスチレン、ｍ−メチルスチレン、ｐ−メ
チルスチレン等があげられるがこれに限られるものでは
ない。またシアン化ビニル化合物は例えばアクリロニト
リルおよびメタクリロニトリル等で好ましくはアクリロ
ニトリルで、又市販の重合に適したものであれば特に制
限はない。Examples of the aromatic vinyl compound used in the present invention include styrene-based monomers other than α-methylstyrene, such as styrene, o-methylstyrene, m-methylstyrene and p-methylstyrene, but are not limited thereto. It is not something that can be done. The vinyl cyanide compound is, for example, acrylonitrile or methacrylonitrile, preferably acrylonitrile, and is not particularly limited as long as it is suitable for commercial polymerization.
芳香族ビニル−シアン化ビニル共重合体の組成は、芳
香族ビニル化合物65〜80重量％、シアン化ビニル化合物
20〜35重量％であり、シアン化ビニル化合物の量が20重
量％未満では、強度の低下をもたらし、35重量％を超え
ると得られた共重合体の色相の低下が大きい。The composition of the aromatic vinyl-vinyl cyanide copolymer is 65 to 80% by weight of the aromatic vinyl compound and the vinyl cyanide compound.
When the amount of the vinyl cyanide compound is less than 20% by weight, the strength is lowered, and when it exceeds 35% by weight, the hue of the obtained copolymer is largely reduced.
α−メチルスチレン−アクリロニトリル共重合体
（Ａ）と芳香族ビニル−シアン化ビニル共重合体（Ｂ）
の組成はα−メチルスチレン−アクリロニトリル共重合
体（Ａ）55-95重量％、芳香族ビニル−シアン化ビニル
化合物（Ｂ）５〜45重量％である。α−メチルスチレン
−アクリロニトリル共重合体（Ａ）の量が55重量％未満
では、耐熱性を向上させることは困難であり、又95重量
％を超えると強度の低下が大きい。α-Methylstyrene-acrylonitrile copolymer (A) and aromatic vinyl-vinyl cyanide copolymer (B)
The composition is α-methylstyrene-acrylonitrile copolymer (A) 55-95% by weight, and aromatic vinyl-vinyl cyanide compound (B) 5-45% by weight. If the amount of the α-methylstyrene-acrylonitrile copolymer (A) is less than 55% by weight, it is difficult to improve the heat resistance, and if it exceeds 95% by weight, the strength is largely reduced.
本発明の樹脂組成物は全光線透過率が85％以上、曇り
価２％以下が好ましく、この範囲以外では、透明性が低
下するので好ましくない。The resin composition of the present invention preferably has a total light transmittance of 85% or more and a haze value of 2% or less. If it is outside this range, the transparency is lowered, which is not preferable.
本発明のα−メチルスチレン−アクリロニトリル共重
合体の製造方法は、通常知られている懸濁安定剤を使用
して水性媒体中で行なわれる。また重合して得られたα
−メチルスチレン−アクリロニトリル共重合体に通常使
用される添加剤、例えば可塑剤、安定剤、着色剤を添加
しても差し支えない。The method for producing the α-methylstyrene-acrylonitrile copolymer of the present invention is carried out in an aqueous medium using a generally known suspension stabilizer. Α obtained by polymerization
Additives that are commonly used in methylstyrene-acrylonitrile copolymers such as plasticizers, stabilizers, and colorants may be added.
（実施例） 以下実施例により本発明を詳細に説明する。(Example) Hereinafter, the present invention will be described in detail with reference to Examples.
実施例および比較例 〔α−メチルスチレン−アクリロニトリル共重合体の製
造〕 撹拌機付き5lオートクレーブに純水2kgと第三リン酸
カルシウム20gを添加し、窒素ガスを吹き込みながら充
分撹拌した。次にα−メチルスチレン1.4kg、アクリロ
ニトリル0.6kgおよび過硫酸カリウム0.2gとｔ−ブチル
パーオキシイソブチレートを16g添加した後、系内を窒
素ガス雰囲気とした。オートクレーブを加熱し、内容物
を84℃まで昇温し、20時間重合反応を行ない重合を完結
した。この様にして得られたスラリ液を15％の塩酸にて
中和、脱水した後、80℃にて乾燥し粒状重合物A-1を得
た。Examples and Comparative Examples [Production of α-methylstyrene-acrylonitrile copolymer] 2 kg of pure water and 20 g of tricalcium phosphate were added to a 5 l autoclave equipped with a stirrer, and the mixture was sufficiently stirred while blowing nitrogen gas. Next, after adding 1.4 kg of α-methylstyrene, 0.6 kg of acrylonitrile, 0.2 g of potassium persulfate and 16 g of t-butylperoxyisobutyrate, the system was made into a nitrogen gas atmosphere. The autoclave was heated, the content was heated to 84 ° C., and the polymerization reaction was carried out for 20 hours to complete the polymerization. The slurry liquid thus obtained was neutralized with 15% hydrochloric acid, dehydrated, and then dried at 80 ° C. to obtain a granular polymer A-1.
得られた粒状重合物A-1の数平均連鎖長1130Å、▲
▼／▲▼＝2.20、アクリロニトリル含量は29.5％
（ケルダール法）であつた。The number average chain length of the obtained granular polymer A-1 was 1130Å, ▲
▼ / ▲ ▼ ＝ 2.20, acrylonitrile content is 29.5%
(Kjeldahl method).
さらに、上記粒状重合物A-1の製造においてα−メチ
ルスチレン、アクリロニトリル、過硫酸カリウム、ｔ−
ブチルパーオキシイソブチレートを同量にし、ｔ−ドデ
シルメルカプタン4gを添加した以外はA-1と同じ製造条
件で製造し、粒状重合物A-2を得た。Further, in the production of the granular polymer A-1, α-methylstyrene, acrylonitrile, potassium persulfate, t-
A granular polymer A-2 was obtained by the same production conditions as A-1 except that 4 g of t-dodecyl mercaptan was added in the same amount as butyl peroxyisobutyrate.
得られた粒状重合物A-2の数平均連鎖長は600Å、▲
▼／▲▼＝2.2、アクリロニトリル含有は29.5％
（ケルダール法）であった。The number average chain length of the obtained granular polymer A-2 was 600Å, ▲
▼ / ▲ ▼ = 2.2, acrylonitrile content is 29.5%
(Kjeldahl method).
スチレン−アクリロニトリル共重合体としては、電気
化学（株）製商品名、デンカAS-S 〔数平均連鎖長2000Å、▲▼／▲▼＝1.96、ア
クリロニトリル含量23.0％（ケルダール法による）〕お
よびAS-U〔数平均連鎖長3080Å▲▼／▲▼＝1.
93アクリロニトリル含量23.2％〕 を用いた。As a styrene-acrylonitrile copolymer, Denka Chemical Co., Ltd. trade name, Denka AS-S [number average chain length 2000Å, ▲ ▼ / ▲ ▼ = 1.96, acrylonitrile content 23.0% (by Kjeldahl method)] and AS- U [number average chain length 3080 Å ▲ ▼ / ▲ ▼ = 1.
93 acrylonitrile content 23.2%] was used.
撹拌機付き5Lオートクレーブに純水2kgと第三リン酸
カルシウム20gを添加し、窒素ガスを吹き込みながら充
分撹拌した。次にスチレン1.52kg,アクリロニトリル0.4
kgおよび過硫酸カリウム0.2gとｔ−ブチルパーオキシイ
ソブチレートを6g、ｔ−ドデシルメルカプタンを10g添
加した後、系内を窒素ガス雰囲気とした。オートクレー
ブを加熱し、内容物を100℃まで昇温し、10時間重合反
応を行い重合を完結した。この様にして得られたスラリ
ー液を15％の塩酸にて中和、脱水した後、80℃にて乾燥
し粒状重合物B-1を得た。To a 5 L autoclave equipped with a stirrer, 2 kg of pure water and 20 g of tricalcium phosphate were added, and they were sufficiently stirred while blowing nitrogen gas. Next, 1.52 kg of styrene and 0.4 of acrylonitrile.
After adding kg and 0.2 g of potassium persulfate, 6 g of t-butylperoxyisobutyrate and 10 g of t-dodecyl mercaptan, the system was made into a nitrogen gas atmosphere. The autoclave was heated, the content was heated to 100 ° C., and a polymerization reaction was carried out for 10 hours to complete the polymerization. The slurry liquid thus obtained was neutralized with 15% hydrochloric acid, dehydrated and then dried at 80 ° C. to obtain a granular polymer B-1.
得られた粒状重合物B-1の数平均連鎖長は800Å、▲
▼／▲▼＝1.98、アクリロニトリル含有は23.1％
（ケルダール法）であった。The number average chain length of the obtained granular polymer B-1 was 800Å, ▲
▼ / ▲ ▼ = 1.98, acrylonitrile content is 23.1%
(Kjeldahl method).
さらに、上記粒状重合物B-1の製造においてｔ−ドデ
シルメルカプタン15gに変更した以外は、B-1と同じ製造
条件で製造し、粒状重合物B-2を得た。Further, a granular polymer B-2 was obtained by the same production conditions as B-1 except that 15 g of t-dodecyl mercaptan was used in the production of the granular polymer B-1.
得られた粒状重合物B-2の数平均連鎖長は600Å、▲
▼／▲▼＝2,2、アクリロニトリル含有は23.2％
（ケルダール法）であった。The number average chain length of the obtained granular polymer B-2 is 600Å, ▲
▼ / ▲ ▼ ＝ 2,2, acrylonitrile content is 23.2%
(Kjeldahl method).
α−メチルスチレン−アクリロニトリル共重合体とス
チレン−アクリロニトリル共重合体を表に示した割合で
ブレンドし、押出機を用いてペレツト化した。このペレ
ツトから試験片を作成し物性を測定し表に示した。The α-methylstyrene-acrylonitrile copolymer and the styrene-acrylonitrile copolymer were blended in the proportions shown in the table and pelletized using an extruder. A test piece was prepared from this pellet and the physical properties were measured and shown in the table.
なお、以下に記載する実施例及び比較例の測定値はい
ずれも下記の方法により求めたものである。The measured values of the examples and comparative examples described below are all obtained by the following method.
（１）落錘強度:50g錘を2m/m厚平板の上に落下させた時
の強度を測定した。(1) Drop weight strength: The strength when a 50 g weight was dropped on a 2 m / m thick flat plate was measured.
（２）ビカツト軟化点:JIS-K6870 （３）全光線透過率量価:ASTM-D-1003 （発明の効果） 以上説明したとおり、本発明は特定の連鎖長と分子量
を有する芳香族ビニル化合物とシアン化ビニル化合物と
の共重合体を２種類ある割合で配合した熱可塑性樹脂組
成物は、透明性があり、耐熱性にすぐれ、しかも流動
性、高強度のバランスにすぐれたものである。(2) Bicat softening point: JIS-K6870 (3) Total light transmittance value: ASTM-D-1003 (Effects of the Invention) As described above, the present invention provides a thermoplastic resin composition in which two kinds of copolymers of an aromatic vinyl compound having a specific chain length and a molecular weight and a vinyl cyanide compound are mixed in a certain ratio. It is transparent, has excellent heat resistance, and has an excellent balance of fluidity and high strength.
Claims (1)
リロニトリル25〜35重量％からなる共重合体で、かつポ
リスチレンを基準とした数平均連鎖長が800〜1600Å
で、重量平均連鎖長（▲▼）と数平均連鎖長（▲
▼）の比（▲▼／▲▼）が1.5〜3.0である共
重合体（Ａ）55〜95重量％と、芳香族ビニル化合物（α
−メチルスチレンを除く）65〜80重量％及びシアン化ビ
ニル化合物20〜35重量％からなる共重合体で、かつポリ
スチレンを基準とした数平均連鎖長が1000〜4000Åで、
重量平均連鎖長（▲▼）と数平均連鎖長（▲
▼）の比（▲▼／▲▼）が1.5〜3.0である共重
合体（Ｂ）45〜５重量％とからなる熱可塑性樹脂組成
物。1. A copolymer comprising 65-75% by weight of α-methylstyrene and 25-35% by weight of acrylonitrile and having a number average chain length of 800-1600Å based on polystyrene.
Then, the weight average chain length (▲ ▼) and the number average chain length (▲ ▼)
The ratio (▲ ▼ / ▲ ▼) of ▼) is 55-95% by weight of the copolymer (A) having a ratio of 1.5-3.0 and the aromatic vinyl compound (α).
-Excluding methylstyrene) a copolymer of 65 to 80% by weight and a vinyl cyanide compound 20 to 35% by weight, and having a number average chain length based on polystyrene of 1000 to 4000Å,
Weight average chain length (▲ ▼) and number average chain length (▲
A thermoplastic resin composition comprising 45 to 5% by weight of a copolymer (B) having a ratio (▲ ▼ / ▲ ▼) of ▼) of 1.5 to 3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177633A JPH08873B2 (en) | 1985-08-14 | 1985-08-14 | Thermoplastic resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177633A JPH08873B2 (en) | 1985-08-14 | 1985-08-14 | Thermoplastic resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6239649A JPS6239649A (en) | 1987-02-20 |
| JPH08873B2 true JPH08873B2 (en) | 1996-01-10 |
Family
ID=16034408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60177633A Expired - Fee Related JPH08873B2 (en) | 1985-08-14 | 1985-08-14 | Thermoplastic resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08873B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8003798A (en) * | 1980-07-01 | 1982-02-01 | Stamicarbon | COPOLYMER OF ALFA-METHYLSTYRENE AND ACRYLONITRIL. |
| JPS60208309A (en) * | 1984-03-31 | 1985-10-19 | Kanegafuchi Chem Ind Co Ltd | Production of alpha-alkylstyrene polymer |
| JPS60208347A (en) * | 1984-04-03 | 1985-10-19 | Kanegafuchi Chem Ind Co Ltd | Alpha-alkylstyrene resin composition |
-
1985
- 1985-08-14 JP JP60177633A patent/JPH08873B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6239649A (en) | 1987-02-20 |
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