JP7324582B2 - 熱可塑性樹脂組成物およびこれから成形された成形品 - Google Patents
熱可塑性樹脂組成物およびこれから成形された成形品 Download PDFInfo
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- JP7324582B2 JP7324582B2 JP2018246801A JP2018246801A JP7324582B2 JP 7324582 B2 JP7324582 B2 JP 7324582B2 JP 2018246801 A JP2018246801 A JP 2018246801A JP 2018246801 A JP2018246801 A JP 2018246801A JP 7324582 B2 JP7324582 B2 JP 7324582B2
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- CKXVSWMYIMDMPY-UHFFFAOYSA-N tris(2,4,6-trimethylphenyl) phosphate Chemical compound CC1=CC(C)=CC(C)=C1OP(=O)(OC=1C(=CC(C)=CC=1C)C)OC1=C(C)C=C(C)C=C1C CKXVSWMYIMDMPY-UHFFFAOYSA-N 0.000 description 1
- AZSKHRTUXHLAHS-UHFFFAOYSA-N tris(2,4-di-tert-butylphenyl) phosphate Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(=O)(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C AZSKHRTUXHLAHS-UHFFFAOYSA-N 0.000 description 1
- KOWVWXQNQNCRRS-UHFFFAOYSA-N tris(2,4-dimethylphenyl) phosphate Chemical compound CC1=CC(C)=CC=C1OP(=O)(OC=1C(=CC(C)=CC=1)C)OC1=CC=C(C)C=C1C KOWVWXQNQNCRRS-UHFFFAOYSA-N 0.000 description 1
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Description
本発明のポリカーボネート樹脂は、熱可塑性樹脂組成物の化学的耐性、難燃性、流動性などを向上させるために、重量平均分子量が異なる2種のポリカーボネート樹脂を混合したものであって、GPC(ゲル浸透クロマトグラフィー)で測定した重量平均分子量が10,000g/mol~30,000g/mol、好ましくは15,000g/mol~29,000g/molである第1のポリカーボネート樹脂と、GPCで測定した重量平均分子量が35,000g/mol~60,000g/mol、好ましくは36,000g/mol~50,000g/molである第2のポリカーボネート樹脂と、を含むものである。
本発明で用いられるコア-シェル構造を有するゴム変性ビニルグラフト共重合体は、熱可塑性樹脂組成物の化学的耐性(耐油性)、耐衝撃性、外観特性などを向上させるものであって、ゴム質重合体にアルキル(メタ)アクリレート単量体、またはアルキル(メタ)アクリレート単量体および芳香族ビニル単量体を含む単量体混合物がグラフト重合されてなるものであってもよい。例えば、前記コア-シェル構造を有するゴム変性ビニルグラフト共重合体は、ゴム質重合体にアルキル(メタ)アクリレート単量体、またはアルキル(メタ)アクリレート単量体および芳香族ビニル単量体を含む単量体混合物をグラフト重合することによって得ることができる。重合は、乳化重合、懸濁重合などの公知の重合方法によって行われてもよい。また、前記コア-シェル構造を有するゴム変性ビニルグラフト共重合体は、コア(ゴム質重合体)-シェル(アルキル(メタ)アクリレート単量体由来の構成単位または単量体混合物に含まれる単量体由来の構成単位を有する重合体)の構造を有する。
本発明の一具体例に係る芳香族ビニル共重合体樹脂は、芳香族ビニル単量体由来の構成単位およびシアン化ビニル単量体由来の構成単位を含む重合体であってもよい。例えば、前記芳香族ビニル共重合体樹脂は、芳香族ビニル単量体およびシアン化ビニル単量体を混合した後、これを重合することによって得ることができる。重合は、乳化重合、懸濁重合、塊状重合などの公知の重合方法によって行われてもよい。
本発明の一具体例に係るリン系難燃剤は、通常の熱可塑性樹脂組成物に使用されるリン系難燃剤であってもよい。例えば、ホスフェート化合物、ホスホネート化合物、ホスフィネート化合物、ホスフィンオキシド化合物、ホスファゼン化合物、またはこれらの金属塩などのリン系難燃剤を使用してもよい。これらは、単独で使用してもよく、2種以上を混合して使用してもよい。
(A1)重量平均分子量(Mw)が25,000g/molであるビスフェノールA型ポリカーボネート樹脂(製造会社:Lotte Advanced Materials Co.,Ltd.)を使用した。
(B1)ブタジエン/エチルアクリレートゴム(コア、平均粒子径:310nm)に、メチルメタクリレートをグラフト重合することによってシェルを形成したコア-シェル構造を有するゴム変性ビニルグラフト共重合体(製造会社:呉羽化学工業株式会社、製品名:EXL-2602)を使用した。
スチレン75質量%およびアクリロニトリル25質量%が重合されたSAN樹脂(重量平均分子量:130,000g/mol)を使用した。
ビスフェノールAジホスフェート(製造会社:Yoke Chemical、製品名:BDP)を使用した。
ポリエチレンテレフタレート(PET)樹脂(製造会社:Lotte Chemical Corporation、製品名:BCN76)を使用した。
上記の各成分を下記の表1および2に記載した含有量で添加した後、230℃で押出することによってペレットを製造した。押出は、L/D=36、直径45mmである二軸押出機を用いて行った。製造されたペレットを、80℃で2時間以上乾燥した後、6オンス射出成形機(成形温度:230℃、金型温度:60℃)で射出することによって試験片を製造した。製造された試験片に対して下記の方法で物性を評価し、その結果を下記の表1および表2に示した。
(1)耐衝撃性評価:ASTM D256に基づいて、厚さ1/8インチ試験片のノッチ付きアイゾット衝撃強度(単位:kgf・cm/cm)を測定した。
Claims (8)
- ポリカーボネート樹脂 100質量部と、
コア-シェル構造を有するゴム変性ビニルグラフト共重合体 1質量部~30質量部と、
芳香族ビニル共重合体樹脂 5質量部~50質量部と、
リン系難燃剤 5質量部~50質量部と、
ポリエステル樹脂 0.1~30質量部と、
を含み、
前記ポリカーボネート樹脂は、重量平均分子量が10,000g/mol~30,000g/molである第1のポリカーボネート樹脂と、重量平均分子量が35,000g/mol~60,000g/molである第2のポリカーボネート樹脂と、を含み、
前記コア-シェル構造を有するゴム変性ビニルグラフト共重合体は、ブタジエン/エチルアクリレートゴムに少なくともアルキル(メタ)アクリレート単量体がグラフト重合されてなる、熱可塑性樹脂組成物であって、
前記第1のポリカーボネート樹脂および前記第2のポリカーボネート樹脂は、芳香族ポリカーボネート樹脂であり、
前記ポリカーボネート樹脂は、ポリカーボネート樹脂全体の質量を100質量%として、前記第1のポリカーボネート樹脂 10質量%~90質量%と、前記第2のポリカーボネート樹脂 10質量%~90質量%と、を含み、
前記熱可塑性樹脂組成物は、ASTM D256に基づいて測定した厚さ1/8インチ試験片のノッチ付きアイゾット衝撃強度が60kgf・cm/cm~70kgf・cm/cmであり、
前記熱可塑性樹脂組成物は、成形温度300℃、金型温度80℃、射出圧1,500kgf/cm 2 、および射出速度120mm/sの条件で厚さ1.0mmのスパイラル形状の金型で射出成形して得られる試験片のスパイラルフロー長さが160mm~250mmである、熱可塑性樹脂組成物。 - 前記コア-シェル構造を有するゴム変性ビニルグラフト共重合体は、前記ブタジエン/エチルアクリレートゴムに前記アルキル(メタ)アクリレート単量体および芳香族ビニル単量体を含む単量体混合物がグラフト重合されてなる、請求項1に記載の熱可塑性樹脂組成物。
- 前記芳香族ビニル共重合体樹脂は、芳香族ビニル単量体由来の構成単位およびシアン化ビニル単量体由来の構成単位を含む重合体である、請求項1または2に記載の熱可塑性樹脂組成物。
- 前記芳香族ビニル共重合体樹脂は、重量平均分子量が10,000g/mol~300,000g/molである、請求項1~3のいずれか1項に記載の熱可塑性樹脂組成物。
- 前記リン系難燃剤は、ホスフェート化合物、ホスホネート化合物、ホスフィネート化合物、ホスフィンオキシド化合物、およびホスファゼン化合物からなる群より選択される少なくとも1種を含む、請求項1~4のいずれか1項に記載の熱可塑性樹脂組成物。
- 前記熱可塑性樹脂組成物は、UL-94垂直試験法により測定した1.5mm厚の試験片の難燃性が5VBである、請求項1~5のいずれか1項に記載の熱可塑性樹脂組成物。
- 前記熱可塑性樹脂組成物は、ISO R306に基づいて5kgの荷重、50℃/hrの条件で測定したビカット軟化温度が90℃~120℃である、請求項1~6のいずれか1項に記載の熱可塑性樹脂組成物。
- 請求項1~7のいずれか1項に記載の熱可塑性樹脂組成物から成形される、成形品。
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Also Published As
| Publication number | Publication date |
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| JP2019119887A (ja) | 2019-07-22 |
| KR102037585B1 (ko) | 2019-10-28 |
| CN109988406A (zh) | 2019-07-09 |
| US20190203040A1 (en) | 2019-07-04 |
| KR20190081868A (ko) | 2019-07-09 |
| US10822493B2 (en) | 2020-11-03 |
| CN109988406B (zh) | 2022-03-08 |
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