JP2022503504A - 熱可塑性樹脂組成物及び熱可塑性樹脂成形品 - Google Patents
熱可塑性樹脂組成物及び熱可塑性樹脂成形品 Download PDFInfo
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Abstract
Description
本発明は、2019年2月19に出願された韓国特許出願第10-2019-0019094号及び2020年2月6日に出願された韓国特許出願第10-2020-0014203号に基づいた優先権の利益を主張し、当該韓国特許出願の文献に開示されている全ての内容を本明細書の一部として含む。
本発明の一実施形態による熱可塑性樹脂組成物は、1)アクリル系グラフト共重合体を含む第1共重合体と、2)アルキル置換スチレン系単量体単位、シアン化ビニル系単量体単位及び(メタ)アクリレート系単量体単位を含む第2共重合体と、3)アルキル非置換スチレン系単量体単位、シアン化ビニル系単量体単位及び(メタ)アクリレート系単量体単位を含む第3共重合体とを含む。
第1共重合体は、熱可塑性樹脂組成物に優れた耐候性、耐衝撃性、伸率、着色性、耐化学性、加工性、表面光沢特性及び白化特性を付与することができる。
第2共重合体は、熱可塑性樹脂組成物に優れた耐熱性及び耐候性を付与することができる。また、後述した第3共重合体とのシナジー作用により熱可塑性樹脂組成物に優れた耐熱性、耐候性、耐スクラッチ性及び着色性を付与することができる。
第3共重合体は、熱可塑性樹脂組成物に優れた着色性及び加工性を付与することができる。また、前述した第2共重合体とのシナジー作用により熱可塑性樹脂組成物に優れた耐スクラッチ性を付与することができる。
(メタ)アクリレート系重合体は、熱可塑性樹脂組成物に優れた加工性、着色性、耐スクラッチ性及び耐候性を付与することができる。
添加剤は、シリコーン化合物を含んでよい。
本発明の他の一実施形態である熱可塑性樹脂成形品は、本発明の一実施形態による熱可塑性樹脂組成物で製造され、熱変形温度が90℃以上であり、L値が25.5以下であり、鉛筆硬度がF以上である。前記熱可塑性樹脂成形品は、熱変形温度が90から105℃であり、L値が24から25.5であり、鉛筆硬度がF以上のものが好ましく、熱変形温度が91から105℃であり、L値が24から25.2であり、鉛筆硬度がH以上のものがより好ましい。前記熱可塑性樹脂成形品は前述した条件を満たすため、優れた耐熱性、色相特性及び耐スクラッチ性を具現できる。
α-メチルスチレン40重量%、アクリロニトリル30重量%及びメチルメタクリレート30重量%を含む単量体混合物95重量部と、反応溶媒としてトルエン5重量部と、開始剤として1,1-ビス(t-ブチルペルオキシ)シクロヘキサン0.075重量部及びポリエーテルポリ-t-ブチルペルオキシカーボネート0.195重量部とを添加して重合溶液を製造した。前記重合溶液を110℃の温度条件の反応器に連続的に投入して重合反応を行った。製造された重合生成物を脱揮発槽に移送して235℃の温度及び20.6torrの圧力下で未反応単量体と反応溶媒を回収及び除去し、ペレット状の共重合体であるα-メチルスチレン/アクリロニトリル/メチルメタクリレート共重合体(重量平均分子量:95,000g/mol)を製造した。
下記実施例及び比較例で用いられた成分の仕様は次の通りである。
(A-1)第1アクリル系グラフト共重合体:LG化学社製のSA927(平均粒径が450nmのブチルアクリレートゴム質重合体にスチレン及びアクリロニトリルをグラフト重合したグラフト共重合体)を用いた。
(A-2)第2アクリル系グラフト共重合体:LG化学社製のSA100(平均粒径が100nmのブチルアクリレートゴム質重合体にスチレン及びアクリロニトリルをグラフト重合したグラフト共重合体)を用いた。
(B-1):前記製造例1で製造された共重合体を用いた。
(B-2):LG化学社製の200UH(α-メチルスチレン/アクリロニトリル共重合体)を用いた。
(D-1):LG MMA社製のIH830(ポリ(メチルメタクリレート)、重量平均分子量:98,000g/mol)を用いた。
(D-2):LG MMA社製のBA611(ポリ(メチルメタクリレート)、重量平均分子量:45,000g/mol)を用いた。
(D-3):LG MMA社製のBN600(ポリ(メチルメタクリレート)、重量平均分子量:24,000g/mol)を用いた。
実施例及び比較例の熱可塑性樹脂組成物を押出混練機(シリンダー温度:240℃)に投入し押出してペレットを製造し、下記に記載された方法で物性を評価し、その結果を[表1]から[表3]に記載した。
(2)熱変形温度(℃):ASTM D648に基づいてAuto HDT Tester 6A-2(商品名、製造社:TOYOSEIKI)機器で熱変形温度を測定した。
実験例1で製造したペレットを射出して試料を製造し、下記に記載された方法で評価し、その結果を下記[表1]から[表3]に記載した。
(2)着色性:GRETAGMACBETH社製のColor-Eye 7000Aを用いてSCIモードでL値を測定した。
(3)鉛筆硬度:荷重0.5kg、角度45゜に鉛筆を固定した後、試料の表面を鉛筆硬度別に引っかき、目視で引っかきの可否を判断して耐スクラッチ性を測定した。
Claims (11)
- アクリル系グラフト共重合体を含む第1共重合体と、
アルキル置換スチレン系単量体単位、シアン化ビニル系単量体単位及び(メタ)アクリレート系単量体単位を含む第2共重合体と、
アルキル非置換スチレン系単量体単位、シアン化ビニル系単量体単位及び(メタ)アクリレート系単量体単位を含む第3共重合体とを含む、熱可塑性樹脂組成物。 - 前記第1共重合体は、
平均粒径が300から650nmのアクリル系ゴム質重合体にビニル系単量体をグラフト共重合した第1アクリル系グラフト共重合体と、
平均粒径が30から250nmのアクリル系ゴム質重合体にビニル系単量体をグラフト共重合した第2アクリル系グラフト共重合体を含む、請求項1に記載の熱可塑性樹脂組成物。 - 前記第1共重合体は、前記第1アクリル系グラフト共重合体及び第2アクリル系グラフト共重合体を5:95から25:75の重量比で含む、請求項2に記載の熱可塑性樹脂組成物。
- 前記第2共重合体は、アルキル置換スチレン系単量体30から50重量%、シアン化ビニル系単量体20から40重量%及び(メタ)アクリレート系単量体20から40重量%を含む単量体混合物の共重合物である、請求項1~3のいずれか一項に記載の熱可塑性樹脂組成物。
- 前記第1共重合体、第2共重合体及び第3共重合体の和100重量部に対して、
前記第1共重合体20から50重量部と、
前記第2共重合体20から45重量部と、
前記第3共重合体10から40重量部とを含む、請求項1~4のいずれか一項に記載の熱可塑性樹脂組成物。 - (メタ)アクリレート系重合体をさらに含む、請求項1~5のいずれか一項に記載の熱可塑性樹脂組成物。
- 前記(メタ)アクリレート系重合体は、ポリ(メチルメタクリレート)である、請求項6に記載の熱可塑性樹脂組成物。
- 前記第1共重合体、第2共重合体、第3共重合体及び(メタ)アクリレート系重合体の和100重量部に対して、
前記(メタ)アクリレート系重合体を1から20重量部で含むものである、請求項6又は7に記載の熱可塑性樹脂組成物。 - シリコーン化合物を含む添加剤をさらに含む、請求項1~8のいずれか一項に記載の熱可塑性樹脂組成物。
- 前記第1共重合体、第2共重合体及び第3共重合体の和100重量部に対して、
前記添加剤0.1から0.3重量部で含む、請求項9に記載の熱可塑性樹脂組成物。 - 請求項1~10のいずれか一項に記載の熱可塑性樹脂組成物で製造され、
熱変形温度が90℃以上であり、
L値が25.5以下であり、
鉛筆硬度がF以上である、熱可塑性樹脂成形品。
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