JP6878689B2 - コア‐シェル共重合体の製造方法、これによって製造されたコア‐シェル共重合体及びこれを含む樹脂組成物 - Google Patents
コア‐シェル共重合体の製造方法、これによって製造されたコア‐シェル共重合体及びこれを含む樹脂組成物 Download PDFInfo
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- JP6878689B2 JP6878689B2 JP2020513301A JP2020513301A JP6878689B2 JP 6878689 B2 JP6878689 B2 JP 6878689B2 JP 2020513301 A JP2020513301 A JP 2020513301A JP 2020513301 A JP2020513301 A JP 2020513301A JP 6878689 B2 JP6878689 B2 JP 6878689B2
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Classifications
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
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Description
実施例1
コア重合:1段階
攪拌機、温度計、窒素投入口及び循環コンデンサーが備えられた4口フラスコ反応器を準備し、イオン水(deionizedwater;DDIwater)100重量部、硫酸第一鉄(ferrous sulfate)0.002重量部及びエチレンジアミン四酢酸二ナトリウム(disodium ethylenediaminetetraacetate)0.04重量部を投入した後、窒素雰囲気下で上記反応器の内部温度を40℃に維持させた。
上記反応開始後、重合転換率が90%である時点で、多官能性アクリル系架橋剤でジペンタエリトリトールヘキサアクリレート(dipentaerythritol hexaacrylate、DPHA)0.05重量部及びメチルメタクリレート(MMA)5重量部を一気に投入し、開始剤でt‐ブチルヒドロパーオキシド(tert‐butyl hydroperoxide)0.003重量部及びホルムアルデヒドスルホキシラートナトリウム(sodium formaldehyde sulfoxylate)0.03重量部を一気に投入して3時間反応させた。
次いで、上記コア重合完了後、メチルメタクリレート(MMA)5重量部、スチレン(styrene、SM)5重量部を一気に投入し、開始剤でt‐ブチルヒドロパーオキシド(tert‐butyl hydroperoxide)0.001重量部及びホルムアルデヒドスルホキシラートナトリウム(sodium formaldehyde sulfoxylate)0.03重量部を一気に投入して1時間反応させた。
次いで、コア‐シェル共重合体を粉体の形態で収得するために、上記収得されたコア‐シェル共重合体ラテックスを、イオン水(deionizedwater)を利用して固形分を基準にして総固形分含量の15重量%に希釈し、コア‐シェル共重合体ラテックスの温度を80℃ ないし85℃に上昇させた。ここで、コア‐シェル共重合体ラテックス100重量部を基準にして硫酸マグネシウム水溶液(濃度10重量%)6重量部を一気に投入し、凝集してスラリーを得た後、収得したスラリーをイオン交換水で2回ないし3回洗浄(washing)して副産物を洗い出した後、ろ過(filtration)を通じて洗浄水を取り除き、小型の流動層乾燥器(fluidized‐bed dryer)を利用して80℃で3時間乾燥させ、コア‐シェル共重合体の粉体試料を収得した。
上記実施例1において、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに0.5重量部で投入したことを除いて、上記実施例1と同様の方法で行った。
上記実施例1において、コア重合1段階の重合時、メチルメタクリレート(MMA)を75重量部の代わりに80重量部で、ブチルアクリレート(BA)を10重量部の代わりに5重量部で投入したことを除いて、上記実施例1と同様の方法で行った。
上記実施例3において、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに0.25重量部で投入したことを除いて、上記実施例3と同様の方法で行った。
上記実施例3において、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに0.5重量部で投入したことを除いて、上記実施例3と同様の方法で行った。
上記実施例1において、コア重合2段階の重合時に用いられたジペンタエリトリトールヘキサアクリレート(DPHA)の代わりにジペンタエリトリトールペンタアクリレート(dipentaerythritol pentaacrylate、DPPA)を投入したことを除いて、上記実施例1と同様の方法で行った。
上記実施例1において、コア重合1段階の重合時、メチルメタクリレート(MMA)を75重量部の代わりに40重量部で、ブチルアクリレート(BA)を10重量部の代わりに45重量部で投入したことを除いて、上記実施例1と同様の方法で行った。
上記実施例1において、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を投入していないことを除いて、上記実施例1と同様の方法で行った。
上記実施例1において、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに0.01重量部で投入したことを除いて、上記実施例1と同様の方法で行った。
上記実施例3において、コア重合2段階の重合時、メチルメタクリレート(MMA)を投入していないことを除いて、上記実施例1と同様の方法で行った。比較例4で投入された単量体の総含量は、実施例3の単量体の総含量100重量部を基準にして95重量部で投入した。
上記実施例3において、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに1.0重量部で投入したことを除いて、上記実施例3と同様の方法で行った。
上記実施例1において、コア重合1段階の重合時、メチルメタクリレート(MMA)を75重量部の代わりに85重量部で、ブチルアクリレート(BA)を10重量部の代わりに5重量部で投入し、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに0.5重量部で投入し、コア‐シェル共重合体の重合3段階の重合時、スチレン(SM)を投入していないことを除いて、上記実施例1と同様の方法で行った。
上記実施例1において、コア重合1段階の重合時、メチルメタクリレート(MMA)を75重量部の代わりに90重量部で、ブチルアクリレート(BA)を10重量部の代わりに5重量部で投入し、コア重合2段階の重合時、ジペンタエリトリトールヘキサアクリレート(DPHA)を0.05重量部の代わりに0.5重量部で投入し、コア‐シェル共重合体重合3段階の重合時、メチルメタクリレート(MMA)及びスチレン(SM)を投入していないことを除いて、上記実施例1と同様の方法で行った。
上記実施例4において、コア重合2段階の重合を重合転換率が40%の時点で行ったことを除いて、上記実施例4と同様の方法で行った。
上記実施例4において、コア重合2段階の重合を重合転換率が97%の時点で行ったことを除いて、上記実施例4と同様の方法で行った。
上記実施例4において、コア重合1段階の重合時、メチルメタクリレート(MMA)を80重量部の代わりに85重量部で投入し、ブチルアクリレート(BA)を投入していないことを除いて、上記実施例4と同様の方法で行った。
上記実施例4において、コア重合1段階の重合時、メチルメタクリレート(MMA)を投入せず、ブチルアクリレート(BA)を5重量部の代わりに85重量部で投入したことを除いて、上記実施例4と同様の方法で行った。
上記実施例1において、コア重合2段階の重合時に用いられたジペンタエリトリトールヘキサアクリレート(DPHA)の代わりにテトラエチレングリコールジアクリレート(tetraethylene glycol diacrylate、TTEGDA)を投入したことを除いて、上記実施例1と同様の方法で行った。
実験例1
上記実施例1ないし6及び比較例1ないし12のコア‐シェル共重合体の重合時、それぞれ1段階、2段階及び3段階で製造されたコア及びコア‐シェル共重合体の重量平均分子量を下記の方法で測定し、各段階別に投入された単量体及び多官能性アクリル系架橋剤の含量(重量部)とともに表1及び2に示す。
コア‐シェル共重合体を塩化ビニル樹脂の加工助剤で利用する時の発泡加工特性を評価するために、塩化ビニル樹脂(LG化学社製造、製品名LS080)100重量部に、複合安定剤(丹石産業社製造、製品名KD‐105)5重量部、充填剤で炭酸カルシウム(CaCO3)7重量部、二酸化チタン(TiO2)2重量部及びワックス型活剤(製品名AC316A)0.2重量部を添加した後、上記実施例1ないし6及び比較例1ないし12で製造されたコア‐シェル共重合体をそれぞれ5重量部及び発泡剤でアゾジカルボンアミド(azodicarbonamide)0.8重量部を添加し、ヘンセルミキサーを利用して110℃まで昇温しながら混練(mixing)させ、コア‐シェル共重合体を含む塩化ビニル系樹脂組成物を製造した後、発泡特性、加工性及び溶融圧力と関わる物性を下記方法で測定して表3及び4に示す。
コア‐シェル共重合体を塩化ビニル樹脂の加工助剤で利用する時の粘着性を評価するために、塩化ビニル樹脂(LG化学社製造、製品名LS080、重合度800)100重量部、スズ系安定化剤3重量部及びカルシウムステアレート0.9重量部を常温でヘンセルミキサーに投入し、115℃まで昇温させながら1,000rpmの撹拌速度で混練させた後、40℃まで冷却させてマスターバッチ(master batch)を製造した。上記マスターバッチに実施例1ないし6及び比較例1ないし12で製造されたコア‐シェル共重合体をそれぞれ3重量部添加した後、常温でまた混練した後、6インチの2‐ロールミルを使って粉体混合物100重量部をロール混練温度200℃、ロール回転数14×15rpm、ロール間隔0.3mmの条件下で4分間加工(milling)した後、ロール表面での粘着性が剥離されながら全く伸びない場合は5点、剥離されながらほとんど伸びない場合は4点、剥離されながら一部伸びる場合は3点、剥離されながら大概伸びる場合は2点、剥離されない場合は1点にして、粘着性を1点ないし5点で評価し、これを表5及び6に示す。
Claims (12)
- 単量体の総含量100重量部を基準にして、メチル(メタ)アクリレート単量体70重量部ないし90重量部及び炭素数2ないし12のアルキル(メタ)アクリレート単量体1重量部ないし20重量部を重合して、コアを重合する段階(S10);
上記(S10)段階のコア重合時、重合転換率が70%ないし90%である時点で、メチル(メタ)アクリレート単量体1重量部ないし10重量部及び多官能性アクリル系架橋剤0.04重量部ないし0.7重量部を投入して重合することでコアを重合する段階(S20);
上記(S20)段階で重合されたコアの存在下で、メチル(メタ)アクリレート単量体1重量部ないし10重量部及び芳香族ビニル単量体1重量部ないし10重量部を投入して重合することでコア‐シェル共重合体を重合する段階(S30)を含み、
前記単量体の総含量は、(S10)、(S20)および(S30)の段落で投入されるメチル(メタ)アクリレート単量体、炭素数2ないし12のアルキル(メタ)アクリレート単量体及び芳香族ビニル単量体の総含量であり、
前記多官能性アクリル系架橋剤が、ジペンタエリトリトールペンタアクリレート、ジペンタエリトリトールヘキサアクリレート、またはこれらの混合物である
コア‐シェル共重合体の製造方法。 - 上記多官能性アクリル系架橋剤は、ジペンタエリトリトールヘキサアクリレート(dipentaerythritol hexaacrylate)である請求項1に記載のコア‐シェル共重合体の製造方法。
- 上記多官能性アクリル系架橋剤の投入量は0.05重量部ないし0.5重量部である請求項1または2に記載のコア‐シェル共重合体の製造方法。
- 上記(S20)段階は、上記(S10)段階のコア重合時、重合転換率が80%ないし90%である時点で実施されることである請求項1〜3のいずれか一項に記載のコア‐シェル共重合体の製造方法。
- 上記(S20)段階で製造されたコアの重量平均分子量は15,000,000g/mol以上である請求項1〜4のいずれか一項に記載のコア‐シェル共重合体の製造方法。
- 上記(S20)段階で製造されたコアの重量平均分子量は16,000,000g/molないし17,000,000g/molである請求項1〜5のいずれか一項に記載のコア‐シェル共重合体の製造方法。
- 上記(S10)段階で、メチル(メタ)アクリレート単量体の投入量は75重量部ないし80重量部で、炭素数2ないし12のアルキル(メタ)アクリレート単量体の投入量は5重量部ないし10重量部である請求項1〜6のいずれか一項に記載のコア‐シェル共重合体の製造方法。
- 上記(S20)段階で、メチル(メタ)アクリレート単量体の投入量は4重量部ないし6重量部である請求項1〜7のいずれか一項に記載のコア‐シェル共重合体の製造方法。
- 上記(S30)段階で、メチル(メタ)アクリレート単量体の投入量は4重量部ないし6重量部で、芳香族ビニル単量体の投入量は4重量部ないし6重量部である請求項1〜8のいずれか一項に記載のコア‐シェル共重合体の製造方法。
- コア及び上記コアを包むシェルを含むコア‐シェル共重合体において、
上記コアは、前記コア‐シェル共重合体に含まれる単量体来由反復単位の総含量に対してメチル(メタ)アクリレート単量体来由反復単位70重量%ないし90重量%、炭素数2ないし12のアルキル(メタ)アクリレート単量体来由反復単位1重量%ないし20重量%及び多官能性アクリル系架橋剤来由架橋部を含み、
前記コアの前記メチル(メタ)アクリレート単量体来由反復単位は、メチル(メタ)アクリレート単量体が重合されて形成された反復単位であり、前記炭素数2ないし12のアルキル(メタ)アクリレート単量体来由反復単位は、炭素数2ないし12のアルキル(メタ)アクリレート単量体が重合されて形成された反復単位であり、前記多官能性アクリル系架橋剤来由架橋部は、多官能性アクリル系架橋剤が、メチル(メタ)アクリレート単量体と炭素数2ないし12のアルキル(メタ)アクリレート単量体が重合された複数個のコア成分を、または前記コアとシェルを架橋させた形態の架橋部であり、
上記シェルは、前記コア‐シェル共重合体に含まれる単量体来由反復単位の総含量に対してメチル(メタ)アクリレート単量体来由反復単位1重量%ないし10重量%及び芳香族ビニル単量体来由反復単位1重量%ないし10重量%を含み、
上記多官能性アクリル系架橋剤来由架橋部の含量は、前記コア−シェル共重合体に含まれる単量体来由反復単位の総含量100重量部を基準にして0.04重量部ないし0.7重量部で、
重量平均分子量が11,000,000g/mol以上であり、
前記多官能性アクリル系架橋剤が、ジペンタエリトリトールペンタアクリレート、ジペンタエリトリトールヘキサアクリレート、またはこれらの混合物であるコア‐シェル共重合体。 - 上記コア‐シェル共重合体は、重量平均分子量が12,000,000g/molないし13,500,000g/molである請求項10に記載のコア‐シェル共重合体。
- 請求項10または11に記載のコア‐シェル共重合体及び塩化ビニル樹脂を含む樹脂組成物。
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KR1020190082622A KR102248039B1 (ko) | 2018-07-13 | 2019-07-09 | 코어-쉘 공중합체 제조방법, 이로부터 제조된 코어-쉘 공중합체 및 이를 포함하는 수지 조성물 |
PCT/KR2019/008499 WO2020013605A1 (ko) | 2018-07-13 | 2019-07-10 | 코어-쉘 공중합체 제조방법, 이로부터 제조된 코어-쉘 공중합체 및 이를 포함하는 수지 조성물 |
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JPS57182310A (en) * | 1981-05-07 | 1982-11-10 | Asahi Chem Ind Co Ltd | Multi-layer structure acrylate polymer composition |
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US5212251A (en) | 1990-09-24 | 1993-05-18 | Rohm And Haas Company | Alkali-resistant core-shell polymers |
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JP2011195809A (ja) | 2010-02-26 | 2011-10-06 | Saiden Chemical Industry Co Ltd | 重合体組成物の製造方法 |
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