JP2012001501A - ビニル化合物の重合防止剤組成物ならびにこれを用いたビニル化合物の重合防止方法 - Google Patents
ビニル化合物の重合防止剤組成物ならびにこれを用いたビニル化合物の重合防止方法 Download PDFInfo
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- JP2012001501A JP2012001501A JP2010138926A JP2010138926A JP2012001501A JP 2012001501 A JP2012001501 A JP 2012001501A JP 2010138926 A JP2010138926 A JP 2010138926A JP 2010138926 A JP2010138926 A JP 2010138926A JP 2012001501 A JP2012001501 A JP 2012001501A
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- compound
- oxyl
- polymerization
- aromatic
- solvent
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- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical group O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229960000790 thymol Drugs 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 229960004441 tyrosine Drugs 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
- C08F2/40—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation using retarding agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
- C07C39/04—Phenol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/92—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with a hetero atom directly attached to the ring nitrogen atom
- C07D211/94—Oxygen atom, e.g. piperidine N-oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Hydrogenated Pyridines (AREA)
- Polymerisation Methods In General (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
【解決手段】(A)N−オキシル化合物、(B)芳香族環上に少なくとも1つの水酸基を有する芳香族化合物および(C)N−オキシル化合物の溶剤を含有してなるビニル化合物の重合防止剤組成物、およびこの重合防止剤組成物を、ビニル化合物を含む流体に直接、あるいは、溶媒に希釈して添加することを特徴とするビニル化合物の重合防止方法。
【選択図】なし
Description
,6−テトラメチルピペリジノオキシルを用いることが記載されている。特許文献3には、3−オキソ−2,2,5,5−テトラメチルピロリジノオキシル、4−アセトキシ−2,2,6,6−テトラメチルピペリジノオキシルなどを用いる方法が記載されている。
しかしながら、N−オキシル化合物は融点が高く結晶化しやすいので、10℃以下の低温状態では、組成物中でN−オキシル化合物が結晶析出する場合がある。このように結晶が析出すると、ポンプの詰まりを生じ、注入不具合を起こすといった問題がある。また、プロセスへの送液ラインが低温に曝されることにより、送液ライン内で結晶化してラインが閉塞したり、N−オキシル化合物の組成物や溶液を貯蔵しておくタンク中で結晶が析出し、組成物中の溶液部分のN−オキシル化合物量が減少するという問題がある。これらトラブルによりN−オキシル化合物が対象とするプロセスへ適正に添加されないと、前述のように、ラジカル重合を完全に停止することができず、操業上大きな問題となる。これらの結晶化を防止するためには、組成物やその溶液中のN−オキシル化合物濃度を極めて低く維持するか、あるいは、該タンクやラインならびにポンプを電気あるいは、水蒸気により加温し、結晶化を防ぐなどの対策が必要であった。しかし、このような対策では、有効濃度のN−オキシル化合物をプロセスに添加するために併せて多量の不用な溶剤を添加する、また適切な加温状態を維持するために煩雑な管理が欠かせないなどの問題点があった。
(式中、R5は水素原子、水酸基、炭素数1〜3のアルキル基、炭素数1〜3のアルコキシ基、炭素数1〜3のカルボン酸または炭素数1〜3のアミドを示す)
請求項2に係る発明は、前記のA成分のN−オキシル化合物が、4−ヒドロキシ−2,2,6,6−テトラメチルピペリジン−1−オキシル、2,2,6,6−テトラメチルピペリジン−1−オキシル、4−オキソ−2,2,6,6−テトラメチルピペリジン−1−オキシルおよび4−メトキシ−2,2,6,6−テトラメチルピペリジン−1−オキシルのうちの少なくとも1種である請求項1記載の組成物であり、請求項3に係る発明は、前記のB成分の芳香族化合物が、フェノール、メトキシフェノール、ハイドロキノン、カテコールおよび4−t−ブチルカテコールのうちの少なくとも1種である請求項1記載の組成物であり、請求項4に係る発明は、前記のC成分のN−オキシル化合物の溶剤が、水、アルコール化合物、および脂肪族あるいは芳香族炭化水素のうちの少なくとも1種である請求項1記載の組成物であり、請求項5に係る発明は、請求項1〜4記載のいずれかの組成物を、ビニル化合物を含む流体に直接、あるいは、溶媒に希釈して添加することを特徴とするビニル化合物の重合防止方法である。
本発明の重合防止剤組成物におけるB成分の芳香族化合物の配合量が0.5重量%より低いと充分な低温安定化効果が得られず、また、50重量%より多く配合しても、結晶析出防止にはさほど寄与せず、経済的に不利である。
[N−オキシル化合物]
A−1:4−ヒドロキシ−2,2,6,6−テトラメチルピペリジン−1−オキシル
A−2:2,2,6,6−テトラメチルピペリジン−1−オキシル
A−3:4−オキソ−2,2,6,6−テトラメチルピペリジン−1−オキシル
A−4:4−メトキシ−2,2,6,6−テトラメチルピペリジン−1−オキシル
B−1:フェノール
B−2:ハイドロキノン
B−3:4−メトキシフェノール
B−4:カテコール
B−5:4−t−ブチルカテコール
C−1:水(軟化水)
C−2:エチレングリコールモノブチルエーテル
C−3:エチルベンゼン
B−5:ベンジルアルコール
B−6:シクロヘキサノール
(以上、水以外はすべて東京化成工業製試薬)
N−オキシル化合物、芳香族化合物、及び溶剤を表1〜3に示した重量%で混合調製した組成物を−5℃の恒温槽で7日間放置し結晶の析出の有無を目視で確認した。結果を表1〜3に示した。
C成分として芳香族炭化水素(エチルベンゼン)を選択した場合、B成分の水酸基を有する芳香族化合物を配合しないと、−5℃で結晶析出しないA成分のN−オキシル化合物の上限濃度は5%であり、C成分が水の場合(10%)やアルコール化合物の場合(20%)に比べて低いが、このような厳しい条件においても本発明の組成物ではN−オキシル化合物を10%以上配合できることを示している。
Claims (5)
- 前記のA成分のN−オキシル化合物が、4−ヒドロキシ−2,2,6,6−テトラメチルピペリジン−1−オキシル、2,2,6,6−テトラメチルピペリジン−1−オキシル、4−オキソ−2,2,6,6−テトラメチルピペリジン−1−オキシルおよび4−メトキシ−2,2,6,6−テトラメチルピペリジン−1−オキシルのうちの少なくとも1種である請求項1記載の組成物。
- 前記のB成分の芳香族化合物が、フェノール、メトキシフェノール、ハイドロキノン、カテコールおよび4−t−ブチルカテコールのうちの少なくとも1種である請求項1記載の組成物。
- 前記のC成分の溶剤が、水、アルコール化合物、および脂肪族あるいは芳香族炭化水素のうちの少なくとも1種である請求項1記載の組成物。
- 請求項1〜4記載のいずれかの組成物を、ビニル化合物を含む流体に直接、あるいは、溶媒に希釈して添加することを特徴とするビニル化合物の重合防止方法。
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KR1020127032787A KR101538836B1 (ko) | 2010-06-18 | 2011-06-15 | 비닐 화합물의 중합 방지제 조성물 및 이것을 이용한 비닐 화합물의 중합 방지 방법 |
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CN201180030003.4A CN102947260B (zh) | 2010-06-18 | 2011-06-15 | 乙烯基化合物的阻聚剂组合物及使用该阻聚剂组合物的乙烯基化合物的阻聚方法 |
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WO2013084443A1 (ja) * | 2011-12-09 | 2013-06-13 | 伯東株式会社 | 安定化された4-オキソ-2,2,6,6-テトラメチルピペリジン-1-オキシル含有組成物、ビニル化合物の重合禁止剤組成物、及びこれを用いたビニル化合物の重合禁止方法 |
JP2014148610A (ja) * | 2013-02-01 | 2014-08-21 | Nippon Shokubai Co Ltd | エーテルダイマー組成物および重合体 |
JP2016183133A (ja) * | 2015-03-26 | 2016-10-20 | 三菱化学株式会社 | アクリル酸及びそのエステルの重合防止方法 |
JP2020511571A (ja) * | 2017-03-09 | 2020-04-16 | エコラブ ユーエスエイ インク | 重合阻害剤組成物 |
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