JP4216682B2 - (メタ)アクリル系重合体の製造装置および(メタ)アクリル系重合体の製造方法 - Google Patents
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- 229920000058 polyacrylate Polymers 0.000 title claims description 72
- 238000004519 manufacturing process Methods 0.000 title claims description 37
- 238000006116 polymerization reaction Methods 0.000 claims description 60
- 239000011541 reaction mixture Substances 0.000 claims description 41
- 239000000178 monomer Substances 0.000 claims description 34
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 33
- 229920000642 polymer Polymers 0.000 claims description 22
- 238000001125 extrusion Methods 0.000 claims description 20
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- 239000000203 mixture Substances 0.000 claims description 14
- 239000007870 radical polymerization initiator Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 10
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- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 10
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- 238000012662 bulk polymerization Methods 0.000 description 6
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- LXUNZSDDXMPKLP-UHFFFAOYSA-N 2-Methylbenzenethiol Chemical compound CC1=CC=CC=C1S LXUNZSDDXMPKLP-UHFFFAOYSA-N 0.000 description 1
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- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
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- 150000001298 alcohols Chemical class 0.000 description 1
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- 125000004432 carbon atom Chemical group C* 0.000 description 1
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- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
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- UROXMPKAGAWKPP-UHFFFAOYSA-N dodecane-2-thiol Chemical compound CCCCCCCCCCC(C)S UROXMPKAGAWKPP-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- NUKZAGXMHTUAFE-UHFFFAOYSA-N hexanoic acid methyl ester Natural products CCCCCC(=O)OC NUKZAGXMHTUAFE-UHFFFAOYSA-N 0.000 description 1
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- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- QYZFTMMPKCOTAN-UHFFFAOYSA-N n-[2-(2-hydroxyethylamino)ethyl]-2-[[1-[2-(2-hydroxyethylamino)ethylamino]-2-methyl-1-oxopropan-2-yl]diazenyl]-2-methylpropanamide Chemical compound OCCNCCNC(=O)C(C)(C)N=NC(C)(C)C(=O)NCCNCCO QYZFTMMPKCOTAN-UHFFFAOYSA-N 0.000 description 1
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
重合釜と、脱揮押出装置と、該重合釜と該脱揮押出装置を連結する連結部とを有する(メタ)アクリル系重合体の製造装置において、
前記連結部に機械式背圧弁を有することを特徴とする(メタ)アクリル系重合体の製造装置である。このような(メタ)アクリル系重合体の製造装置によれば、揮発成分含有量の少ない(メタ)アクリル系重合体を安定して製造可能となる。
(A)(メタ)アクリル系単量体と、ラジカル重合開始剤と、連鎖移動剤とを含有する原料組成物を重合釜へ連続的に供給する工程と、
(B)該重合釜で、前記(メタ)アクリル系単量体の少なくとも一部を重合させて、前記(メタ)アクリル系単量体の少なくとも一部が重合した(メタ)アクリル系重合体を含む反応混合物とする工程と、
(C)該反応混合物を前記重合釜から連続的に抜き出す工程と、
(D)前記重合釜から連続的に抜き出された前記反応混合物の圧力を、機械式背圧弁にて調整する工程と、
(E)圧力を調整された前記反応混合物を脱揮押出装置に導入し、脱揮処理して、前記(メタ)アクリル系重合体を得る工程と
を有することを特徴とする(メタ)アクリル系重合体の製造方法である。このような(メタ)アクリル系重合体の製造方法によれば、揮発成分含有量の少ない(メタ)アクリル系重合体を安定して製造可能となる。
(A)(メタ)アクリル系単量体と、ラジカル重合開始剤と、連鎖移動剤とを含有する原料組成物を重合釜へ連続的に供給する工程と、
(B)該重合釜で、前記(メタ)アクリル系単量体の少なくとも一部を重合させて、前記(メタ)アクリル系単量体の少なくとも一部が重合した(メタ)アクリル系重合体を含む反応混合物とする工程と、
(C)該反応混合物を前記重合釜から連続的に抜き出す工程と、
(D)前記重合釜から連続的に抜き出された前記反応混合物の圧力を、機械式背圧弁にて調整する工程と、
(E)圧力を調整された前記反応混合物を脱揮押出装置に導入し、脱揮処理して、前記(メタ)アクリル系重合体を得る工程と
を有することが特徴である。
図1に示した構成の、機械式背圧弁を具備する(メタ)アクリル系重合体の製造装置を用いて、(メタ)アクリル系重合体の製造を行った。
・メタクリル酸メチル(MMA) 98.0質量部
・アクリル酸メチル(MA) 2.0質量部
・n−オクチルメルカプタン 0.25質量部
・tert−ブチルパーオキシ−3,5,5−トリメチルヘキサノエート
(MMAとMAとの合計量に対して)70質量ppm
槽型反応装置から抜き出された反応混合物を、多管式の熱交換機からなる加熱機にて220℃に昇温して、単軸の脱揮押出装置(φ150mm、スクリュー:L/D28)に、機械式背圧弁30を介して導入し、脱揮処理(260℃、ベント42の圧力−0.02MPa、ベント43の圧力−0.097MPa)することで、(メタ)アクリル系重合体を製造した。なお、機械式背圧弁は、(株)岸川特殊バルブ製R−F−93703−3−1(商品名、高圧用40×40背圧弁)を使用し、機械式背圧弁の初期圧力設定は2.1MPaとした。また、重合反応が安定した初期に槽型反応装置から抜き出された反応混合物の重合体含有率は51質量%であり、得られた(メタ)アクリル系重合体中に残存する(メタ)アクリル系単量体は2400ppm、重量平均分子量(標準ポリスチレン換算値)は98000、MMA単位とMA単位の質量比は98.5:1.5であった。
機械式背圧弁30の代わりに、同じ位置に調圧バルブ(手動)を具備すること以外は図1に示した構成の(メタ)アクリル系重合体の製造装置を用いて、実施例1と同様の条件で(メタ)アクリル系重合体の製造を行った。なお、調圧バルブの初期出側圧力は2.1MPaとなるように調整した。また、重合反応が安定した初期に槽型反応装置から抜き出された反応混合物の重合体含有率は51質量%であり、得られた(メタ)アクリル系重合体中に残存する(メタ)アクリル系単量体は2400ppm、重量平均分子量(標準ポリスチレン換算値)は98000、MMA単位とMA単位の質量比は98.5:1.5であった。
11 撹拌装置
12 原料組成物投入口
13 反応混合物排出口
20 連結部
21 ポンプ
22 加熱機
23〜26 配管
30 機械式背圧弁
40 脱揮押出装置
41 反応混合物供給口
42、43 ベント
44 重合体排出口
51 弁座
52 弁体
53 バネ受け
54 弁棒
55 バネ押え
56 バネ
57 調整ボルト
58 キャップ
60 弁
71 導入口
72 排出口
Claims (6)
- 重合釜と、脱揮押出装置と、該重合釜と該脱揮押出装置を連結する連結部とを有する(メタ)アクリル系重合体の製造装置において、
前記連結部に機械式背圧弁を有することを特徴とする(メタ)アクリル系重合体の製造装置。 - 前記機械式背圧弁がバネ式である請求項1に記載の(メタ)アクリル系重合体の製造装置。
- 前記機械式背圧弁が、1〜3MPaの範囲の圧力に調整が可能なものである請求項1または2に記載の(メタ)アクリル系重合体の製造装置。
- (A)(メタ)アクリル系単量体と、ラジカル重合開始剤と、連鎖移動剤とを含有する原料組成物を重合釜へ連続的に供給する工程と、
(B)該重合釜で、前記(メタ)アクリル系単量体の少なくとも一部を重合させて、前記(メタ)アクリル系単量体の少なくとも一部が重合した(メタ)アクリル系重合体を含む反応混合物とする工程と、
(C)該反応混合物を前記重合釜から連続的に抜き出す工程と、
(D)前記重合釜から連続的に抜き出された前記反応混合物の圧力を、機械式背圧弁にて調整する工程と、
(E)圧力を調整された前記反応混合物を脱揮押出装置に導入し、脱揮処理して、前記(メタ)アクリル系重合体を得る工程と
を有することを特徴とする(メタ)アクリル系重合体の製造方法。 - 前記機械式背圧弁がバネ式である請求項4に記載の(メタ)アクリル系重合体の製造方法。
- 前記工程(D)にて、前記反応混合物の圧力を1〜3MPaに調整する請求項4または5に記載の(メタ)アクリル系重合体の製造方法。
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