JP2017536423A - 熱可塑性樹脂組成物及びこれを適用した成形品 - Google Patents
熱可塑性樹脂組成物及びこれを適用した成形品 Download PDFInfo
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- JP2017536423A JP2017536423A JP2016566230A JP2016566230A JP2017536423A JP 2017536423 A JP2017536423 A JP 2017536423A JP 2016566230 A JP2016566230 A JP 2016566230A JP 2016566230 A JP2016566230 A JP 2016566230A JP 2017536423 A JP2017536423 A JP 2017536423A
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- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08L2201/02—Flame or fire retardant/resistant
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
1−1.構成
本発明のグラフト共重合体樹脂は、ゴム状重合体に芳香族ビニル化合物及びシアン化ビニル化合物がグラフトされた共重合体である。
(i)ゴム状重合体の含量
ブロー成形用熱可塑性樹脂として適合した流動性、成形後塗装工程のための耐化学性及び成形完成品としての耐衝撃性を全部満たすためのゴム状重合体の含量は、グラフト共重合体樹脂総重量基準30〜75重量%、好ましくは、40〜60重量%である。前記範囲で樹脂の流動性が低下されなく、衝撃補強効果もまた優れ、最終製造されるグラフト共重合体成形品の衝撃強度及び耐化学性も優れる。
耐衝撃性と加工性に優れた熱可塑性樹脂を得るためには、粒子径の大きなゴム状重合体を使用しなければならなく、表面光沢性に優れた熱可塑性樹脂を得るためには粒子径の小さなゴム状重合体を使用しなければならない。
ゴム状重合体のゲル含有率は、特に限定されないが、ゲル含量が低いほどゴム状重合体内部の単量体が多く膨潤され、重合が起こるので、見かけ粒子径が増加して衝撃強度が向上される反面、ゲル含量が高いほど見かけ粒子径が減少して表面光沢性に優れる。
グラフトABS樹脂製造時、グラフト率は物性に大きく影響を及ぼす。従って、本発明に用いられるABSのグラフト率は、25〜55%の樹脂を用いるのが好ましい。グラフト率が25%未満のとき、フラフトされず、露出するゴムラテックスが多く存在するようになるので、ゴム粒子同士が衝突して凝集ゴムを形成し、耐候性と透明性が低下しており、グラフト率が55%を超えると、熱安定性が低下し、衝撃効率で利益がない。
グラフトABS樹脂の製造方法は、乳化重合法、懸濁重合法、溶液重合法、塊状重合法、懸濁重合と塊状重合とを共に用いる方法及び乳化重合と塊状重合とを共に用いる方法などが知られている。このような方法のうち、生産現場では、通常、乳化重合法(Emulsion Polymerization)と塊状重合法(Bulk Polymerization)とが用いられる。
2−1.種類
ABS樹脂に耐熱性を与える一般的な方法には、耐熱性に優れたα−メチルスチレン系又はマレイミド系単量体をABS重合過程で添加する方法と、前記耐熱性に優れた単量体が含まれた耐熱性共重合体をABS樹脂と混合する方法がある。このとき、耐熱性に優れた共重合体は、通常α−メチルスチレン系又はマレイミド系単量体をアクリロニトリルなどのビニルシアン化合物及び/又はスチレンなどの芳香族ビニル化合物単量体と共重合、又は三元共重合させて製造する。
本発明の耐熱性共重合体としてAMS系重合体は、下記式(2)で示されるAMSとアクリロニトリル(AN)との共重合体である。
本発明の耐熱性樹脂としてPMI系重合体は、N−(置換)マレイミド、ビニル系単量体及び不飽和ジカルボン酸の共重合体であってもよい。通常、PMI系重合体は、下記式(3)で示されるN−フェニルマレイミド−スチレン−無水マレイン酸(PMI-Styrene-Maleic Anhydride)の三元共重合体として示される。
(i)ガラス転移温度
ガラス転移温度は125℃を基準に、耐熱性樹脂のガラス転移温度が基準温度以上のとき樹脂の耐熱性に優れるが、流動性が低下されることになる。従って、ブロー成形用熱可塑性樹脂に含まれる耐熱性樹脂として耐熱性に優れた長所があるが、流動性が低下して、生産性が落ちる短所がある。
本発明の耐熱性樹脂は、重量平均分子量が80,000以上250,000以下のものを用いる。80,000未満のとき、耐化学性及び耐熱度低下の問題があり、250,000を超えると、耐化学性は向上されるが、流動性が低下し、加工が容易ではなく、生産性が低下する。
前述したABS樹脂の製造方法と同様に、耐熱性樹脂の製造方法も様々であるが、該方法のうち生産現場では、通常、乳化重合法(Emulsion Polymerization)と塊状重合法(Bulk Polymerization)とが使用されている。
A.ABS基本樹脂
共役ジエン系ゴム状重合体に、芳香族ビニル化合物及びシアン化ビニル化合物がグラフトされた共重合体として、乳化重合で製造されたゴム状重合体の含量が60%のABS(SR172、LG化学社製)を用いた。
B−1.乳化重合で製造されたガラス転移温度が130℃であり、重量平均分子量が170,000のAMS耐熱性樹脂(PW635、LG化学社製)を用いた。
ガラス転移温度が201℃で重量平均分子量が150,000であるPMI耐熱性樹脂(MS−NB、Denka社製)を使った。
以下の実施例1〜3及び比較例1、2は、ABS樹脂(A)の含量を固定し、ガラス転移温度と重量平均分子量が異なるAMS系耐熱性樹脂(B−1、B−2)及びPMI系耐熱性樹脂(C)を下記表1に示された成分比により組成物を製造したものである。表1において、A、B−1、B−2、Cは、前記用意された熱可塑性樹脂である。
前記で用意された共重合体、樹脂などを用いており、(A)ABS基本樹脂(SR172、LG化学社製)を38重量%に固定した。但し、これらのうちの一部含量を(B−1)AMS系耐熱性樹脂(PW635、LG化学社製)を62重量%で製造した。
前記で用意された共重合体、樹脂などを用いており、(A)ABS基本樹脂(SR172、LG化学社製)を38重量%に固定した。但し、これらのうちの一部含量を(B−1)AMS系耐熱性樹脂(PW635、LG化学社製)を51重量%、(B−2)AMS系耐熱性樹脂(98UHM、LG化学社製)を10重量%、(C)PMI系耐熱性樹脂(MS−NB、Denka社製)を1重量%で製造した。
前記で用意された共重合体、樹脂などを用いており、(A)ABS基本樹脂(SR172、LG化学社製)を38重量%に固定した。但し、これらのうちの一部含量を(B−1)AMS系耐熱性樹脂(PW635、LG化学社製)を40重量%、(B−2)AMS系耐熱性樹脂(98UHM、LG化学社製)を20重量%、(C)PMI系耐熱性樹脂(MS−NB、Denka社製)を2重量%で製造した。
前記で用意された共重合体、樹脂などを用いており、(A)ABS基本樹脂(SR172、LG化学社製)を38重量%に固定した。但し、これらのうちの一部含量を(B−1)AMS系耐熱性樹脂(PW635、LG化学社製)を28重量%、(B−2)AMS系耐熱性樹脂(98UHM、LG化学社製)を31重量%、(C)PMI系耐熱性樹脂(MS−NB、Denka社製)を3重量%で製造した。
前記で用意された共重合体、樹脂などを用いており、(A)ABS基本樹脂(SR172、LG化学社製)を38重量%に固定した。但し、これらのうちの一部含量を(B−2)AMS系耐熱性樹脂(PW635、LG化学社製)を62重量%で製造した。
下記表2は、前記実施例1〜3及び比較例1、2の組成物を二軸押出機(Twin-Screw Extruder)で、240で混練した後、射出を通して測定用試片を作製し、流動指数(g/10分)、衝撃強度(kg・cm/cm)、熱変形温度(HDT、℃)及び伸率維持率(%)の物性を測定した結果を示したものである。
Claims (12)
- シアン化ビニル化合物−ゴム状重合体−芳香族ビニル化合物のグラフト共重合体樹脂25〜50重量%;及び
ガラス転移温度(Tg)が125℃以上であり、重量平均分子量(Mw)が150,000〜250,000であるα−メチルスチレン(AMS:α-methylstyrene)系耐熱性樹脂30〜75重量%;
を含むブロー成形のための熱可塑性樹脂組成物。 - 前記グラフト共重合体樹脂は、ブタジエンゴム状重合体にアクリロニトリル及びスチレンがグラフトされたABS樹脂であることを特徴とする請求項1に記載のブロー成形のための熱可塑性樹脂組成物。
- 前記グラフト共重合体樹脂は、ゴム状重合体の含量が40〜60重量%であることを特徴とする請求項1に記載のブロー成形のための熱可塑性樹脂組成物。
- 前記耐熱性樹脂は、乳化重合で製造されることを特徴とする請求項1に記載のブロー成形のための熱可塑性樹脂組成物。
- 前記熱可塑性樹脂組成物は、ガラス転移温度が125℃未満であり、重量平均分子量が80,000以上150,000未満であるα−メチルスチレン系耐熱性樹脂を0〜30重量%さらに含むことを特徴とする請求項1に記載のブロー成形のための熱可塑性樹脂組成物。
- 前記α−メチルスチレン系耐熱性樹脂は、塊状重合で製造されることを特徴とする請求項5に記載のブロー成形のための熱可塑性樹脂組成物。
- 前記熱可塑性樹脂組成物は、N−フェニルマレイミド(PMI:Phenyl Maleimide)系耐熱性樹脂を0〜10重量%をさらに含むことを特徴とする請求項1に記載のブロー成形のための熱可塑性樹脂組成物。
- 請求項1に記載の熱可塑性樹脂組成物を用いて、ブロー成形工程で成形した成形品。
- 前記成形品は、ASTM D638−10による伸率維持率が40%以上であることを特徴とする請求項8に記載の成形品。
[但し、前記伸率維持率(%)=(シンナー適用後の伸率/シンナー適用前の伸率)×100] - 前記成形品は、ASTM D1238による流動指数が、0.5〜3.0g/10分であることを特徴とする請求項8に記載の成形品。
[但し、220℃、10kg荷重で10分当たりの押出量(g)を測定] - 前記成形品は、ASTM D256による衝撃強度が、20〜35kg・cm/cmであることを特徴とする請求項8に記載の成形品。
[但し、ノッチ(notch)が形成された1/4’’(6.35mm)厚さの試片を適用] - 前記成形品は、ASTM D648−07による熱変形温度が、100以上120℃以下であることを特徴とする請求項8に記載の成形品。
[但し、18.6kgf/cm2荷重、120/hr条件で、1/4’’(6.35mm)厚さの試片を適用]
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EP3127962B1 (en) | 2019-07-10 |
EP3127962A1 (en) | 2017-02-08 |
EP3127962A4 (en) | 2017-10-18 |
WO2016085222A1 (ko) | 2016-06-02 |
KR20160064864A (ko) | 2016-06-08 |
CN106459542B (zh) | 2019-02-22 |
JP6503374B2 (ja) | 2019-04-17 |
KR101811485B1 (ko) | 2017-12-21 |
CN106459542A (zh) | 2017-02-22 |
US10106677B2 (en) | 2018-10-23 |
US20170260382A1 (en) | 2017-09-14 |
WO2016085222A8 (ko) | 2016-09-29 |
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