JP4081905B2 - Method for producing fluorine-containing diene compound - Google Patents

Method for producing fluorine-containing diene compound Download PDF

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JP4081905B2
JP4081905B2 JP04549799A JP4549799A JP4081905B2 JP 4081905 B2 JP4081905 B2 JP 4081905B2 JP 04549799 A JP04549799 A JP 04549799A JP 4549799 A JP4549799 A JP 4549799A JP 4081905 B2 JP4081905 B2 JP 4081905B2
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polymer
polymerization
fluorine
formula
diene
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JP2000247914A (en
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浩樹 神谷
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AGC Inc
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Asahi Glass Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は新規な含フッ素共役系ジエン化合物の製造方法に関する。
【0002】
【従来の技術】
分子の両末端に二重結合を有するパーフルオロジエン化合物は重合反応性が低く、特殊な条件で重合して環化重合体または一部三次元化した重合体が得られることが知られている(L.A.Wall,Fluoro Polymer,Wiley−Interscience,4,High Pressure Polymerization,p.127)。また、反応性の異なる2種の二重結合を有するフッ素系化合物は環化重合し、非晶質のフッ素重合体が得られることが知られている(特開昭63−238115、特開昭63−238111)。
【0003】
含フッ素ブタジエンについては多く報告されており、例えば、パーフルオロブタジエンについては、アニオン重合でのみ分子量の比較的低い重合体が低収率で得られる。
また、ブタジエンの水素原子を数個フッ素原子に置換した化合物も多く知られており、その重合体も公知である(USP2915508など)。この含フッ素ブタジエンの重合体はエラストマーとして利用できるが、フッ素原子の含有量が低いため、耐熱性、耐油性、撥水性などが充分でなかった。
【0004】
しかし、炭素数の比較的多い置換基を有する共役系ブタジエン化合物は知られてなく、特にフッ素含有置換基を有するブタジエン化合物は知られていない。また、これらの重合体も知られていない。
また、フルオロアルキル基、特に炭素数が比較的多いフルオロアルキル基を側鎖に有する重合体としては、フルオロアルキル基含有アクリレート重合体、フルオロアルキル基含有シリコーン重合体などが知られているのみで、いわゆる炭素数が多い含フッ素置換基を含有するオレフィン系重合体は知られていない。
【0005】
【発明が解決しようとする課題】
本発明はフルオロアルキル基を置換基として有する新規な含フッ素共役系ジエン化合物とその製造方法、ならびに含フッ素共役系ジエン化合物の重合体とその製造方法の提供を目的とする。本発明の重合体は、置換基としてフルオロアルキル基を有するため、重合体中のフッ素含有量が高くなり、耐熱性、耐油性、撥水性などに優れる。
【0006】
【課題を解決するための手段】
本発明は、式2で表される含フッ素オレフィン(以下、含フッ素オレフィン(式2)という)または式3で表される含フッ素オレフィン(以下、含フッ素オレフィン(式3)という)を塩基性化合物存在下に脱HF反応させることを特徴とする、式1で表わされる含フッ素ジエン化合物の製造方法を提供する。
CF=CHCH=CH ・・・式1
CFCHCH=CH ・・・式2
CFCH=CHCH ・・・式3
【0007
【0008
【0009】
【発明の実施の形態】
本発明の含フッ素ジエン化合物(式1)は共役系化合物であり、1位および3位に二重結合を有する。
式1〜式5におけるRは炭素数1〜11のポリフルオロアルキル基である。ポリフルオロアルキル基の炭素数が12以上では、含フッ素ジエン化合物の有機溶剤への溶解性が低下するため合成が困難となり、また重合における含フッ素ジエン化合物の反応活性が低下しやすい。
【0010】
ポリフルオロアルキル基としては、対応するアルキル基における水素原子の数にして60〜100%、好ましくは80〜100%がフッ素原子に置換されたポリフルオロアルキル基が好ましい。さらに、残余の水素原子の一部または全部は、塩素原子などのフッ素原子以外のハロゲン原子に置換されていてもよい。
【0011】
ポリフルオロアルキル基の炭素数が3以上の場合、ポリフルオロアルキル基は分岐状であっても直鎖状であってもよい。より好ましいポリフルオロアルキル基は、直鎖状ポリフルオロアルキル基である。
重合体中のフッ素含有量が高くなり、重合体の耐熱性、耐油性、撥水性などが向上するため、ポリフルオロアルキル基としては炭素数3〜9のパーフルオロアルキル基が好ましい。また、直鎖状パーフルオロアルキル基が好ましい。
【0012】
本発明の含フッ素ジエン化合物(式1)は、たとえば、含フッ素オレフィン(式2)または含フッ素オレフィン(式3)を塩基性化合物存在下に脱HF反応させることにより製造できる。
【0013】
含フッ素オレフィン(式2)は、RCFIに塩化アリルなどのハロゲン化アリルまたは酢酸アリルをラジカル的に付加した後、亜鉛などで処理することにより得られる。酢酸アリルの代わりに、アリルアルコールを付加し、次いでアセチル化した後、亜鉛で処理しても得られる。また、RCFCH=CHにメタノールをラジカル的に付加し、次いでアセチル化した後、脱酢酸しても得られる。
含フッ素オレフィン(式3)は、RCFIにプロピレンを付加し、塩基性化合物で脱HIさせることにより得られる。
【0014】
含フッ素オレフィン(式2)または含フッ素オレフィン(式3)と塩基性化合物との反応は、イソプロピルアルコール(以下、IPAという)などを溶媒とする均一系、または水、メタノールなどを溶媒とする不均一系で進行する。不均一系の反応では、アルキルアンモニウム塩などの相関移動触媒が用いられる。一般に、均一系の反応では高い転化率、選択性が得られる。特に溶媒としてIPAを用いることが好ましい。
【0015】
塩基性化合物としては、水酸化カリウム(以下、KOHという)、水酸化ナトリウムなどのアルカリ金属水酸化物、水酸化カルシウム、水酸化マグネシウムなどのアルカリ土類金属水酸化物、tert−ブトキシカリウム(以下、t−BuOKという)などのアルカリ金属アルコキシド、トリエチルアミン、ピリジンなどの有機アミン化合物が用いられる。
【0016】
反応物の転化率、生成物の選択性の点から、含フッ素オレフィン(式2)との反応にはKOH、水酸化ナトリウムが好ましく用いられる。含フッ素オレフィン(式3)との反応には、含フッ素オレフィン(式3)は若干反応性が低いため比較的塩基性の強力なt−BuOKが好ましく用いられる。
反応温度は、含フッ素オレフィン(式2)の場合、通常40〜100℃の範囲が好ましい。含フッ素オレフィン(式3)の場合、40〜150℃の範囲が好ましい。
【0017】
さらに、本発明の含フッ素ジエン化合物(式1)は、RCFIにアリルアルコールを付加し、次いで付加物のヨウ素を還元した後、臭化水素などで水酸基をハロゲン化した後、塩基性化合物と反応させ、一段階反応で脱フッ化水素、脱臭化水素などの脱ハロゲン化することにより得られる。
【0018】
本発明の製造方法で得られる含フッ素ジエン化合物(式1)は高い重合性を有し、含フッ素ジエン化合物(式1)に基づく重合単位を有する重合体が得られる。
上記重合体としては、少なくとも繰り返し単位(式4)および/または繰り返し単位(式5)を有するものが挙げられる。繰り返し単位(式4)は、含フッ素ジエン化合物(式1)が、1,4−重合様式で重合した構造であり、繰り返し単位(式5)は1,2−重合様式で重合した構造である。
化1

Figure 0004081905
【0019】
上記重合体の分子量は5×10〜1×10である。1×10より大きいと重合体の製造が困難となり、5×10より小さいと重合体は熱安定性が低く、分解しやすい。
また、本発明の製造方法で得られる重合体は、繰り返し単位(式4)と繰り返し単位(式5)以外に、他の単量体に基づく繰り返し単位を含んでもよい。
【0020】
他の単量体としては、テトラフルオロエチレン(以下、TFEという)、クロロトリフルオロエチレン、フッ化ビニリデン、フッ化ビニル、ヘキサフルオロプロピレンなどの含フッ素オレフィン、エチレン、プロピレンなどの炭化水素系オレフィン、メチル(メタ)アクリレート、フルオロアルキル(メタ)アクリレートなどの(メタ)アクリレートや(メタ)アクリロニトリルなどのアクリル系化合物、スチレンとその誘導体、などが挙げられる。好ましい他の単量体は含フッ素オレフィンである。また、重合体中の他の単量体に基づく繰り返し単位の割合は、全繰り返し単位に対して50モル%以下が好ましい。
【0021】
上記重合体は、イオン重合、ラジカル重合など各種の重合方法で得られる。ラジカル開始剤を用いて特に穏和な条件で重合できるラジカル重合法により重合体を得ることが好ましい。重合は、バルク重合、溶液重合、懸濁重合、乳化重合などの重合様式を採用できる。
【0022】
ラジカル開始剤として、水溶性開始剤または油溶性開始剤が重合様式に従って選択して使用される。本発明の重合体は、一般的なラジカル開始剤を用いて重合できる。たとえば、乳化重合においては、過硫酸カリウム、過硫酸アンモニウム、ジコハク酸パーオキシドなどの水溶性過酸化物が用いられる。また、懸濁重合、溶液重合、または塊状重合においては、ジイソプロピルパーオキシジカーボネート(以下、IPPという)、ベンゾイルパーオキシドなどの非フッ素系過酸化物、パーフルオロブタン酸パーオキシドなどのフッ素系過酸化物、アゾビスイソブチロニトリル(以下、AIBNという)などのアゾ化合物などが用いられる。
【0023】
溶液重合においては、溶剤として、CClFCFCHClF(以下、HCFC225cbという)、F(CFF、H(CFFなどのフッ素系溶剤が好ましく用いられる。
重合温度は、ラジカル重合では50〜100℃が好ましい。
【0024】
上記重合体は、柔軟性を有し、ポリフルオロアルキル基を有することにより耐熱性、撥水性、耐油性に優れる。フッ素系溶剤に可溶であるため、耐候性、撥水性、非粘着性に優れた塗料やコーティング材として有用である。また高いフッ素含有量を有するため、誘電率が低く、低誘電率被膜として有用である。
【0025】
また、重合体中に二重結合を有しており、架橋反応、官能基導入などを容易に行えるため、ポリブタジエン、ニトリルゴム、スチレン・ブタジエン共重合体などの汎用樹脂の改質用の共重合単量体としても有用であり、ポリフルオロアルキル基を重合体に容易に導入できる。
【0026】
【実施例】
[例1(参考例)]3−(パーフルオロオクチル)プロペンの合成
撹拌機、ジムロート、滴下ロート付き2Lの三つ口フラスコに、パーフルオロオクチルヨージド2kg、AIBN20gを入れ、70℃にて窒素下にて酢酸アリル440gを6時間かけて滴下した。滴下開始から5、10時間目にAIBN各20gを追加添加し、15時間反応させ酢酸アリル付加物を得た。
【0027】
亜鉛粉末300gとメタノール500mLを入れた別のフラスコに酢酸アリル付加物をメタノール還流温度を維持しながら滴下し、滴下終了後1時間反応を継続した。反応後、相分離した下層の反応生成物を減圧蒸留して、3−(パーフルオロオクチル)プロペン[C17CHCH=CH、沸点68.5℃/20torr]1340gを得た。収率は79.5%であった。
【0028】
[例2]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンの合成
撹拌機、ジムロート、滴下ロート付きの2Lの三つ口フラスコに、KOH165gとIPA500mlを入れ、撹拌下に3−(パーフルオロオクチル)プロペン920gを滴下した。反応により発熱するため、約1時間かけてゆっくり滴下し、その後70℃にて2時間反応を継続した。
【0029】
その後、反応生成物からIPAを水で抽出除去し、減圧蒸留して、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン[C15CF=CHCH=CH、沸点65.5℃/20torr]677.8gを得た。収率は77.0%であった。
19F−NMRによれば、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンはシス体、トランス体の混合物であり、シス体/トランス体比は約1/9であった。
【0030】
19F−NMR(溶媒:CDCOCD)δ(ppm):−81(3F、CF−)、−115.5(0.1F、−CF=CH−(cis))、−118(2F、CF−CF−)、−122〜124(8F、−CF−)、−126.5(2F、−CF−CF=)、−130.5(0.9F、−CF=CH−(trans))、
1H−NMR(溶媒:CDCOCD)δ(ppm):5.48〜5.76(2H、CH=)、6.43〜6.81(2H、=CH−CH=)。
【0031】
[例3(参考例)]1−(パーフルオロオクチル)プロペンの合成
2Lのステンレスオートクレーブにパーフルオロオクチルヨージド1kg、AIBN30gを入れ窒素置換後、プロピレンを0.5kg圧入し、80℃に昇温した。70℃になった時点で5kg/cmGまでプロピレンを加えた。反応の進行に伴い、圧力を一定に維持するためにプロピレンを後添加した。反応は圧力低下がほぼなくなるまで継続した。その後、冷却し、未反応のプロピレンをパージし、プロピレン付加物を得た。
【0032】
撹拌機、ジムロート、滴下ロート付きの2Lの三つ口フラスコに、KOH200gとメタノール500mLを入れ、得られたプロピレン付加物を撹拌下滴下した。相分離した下層の反応生成物を蒸留し、1−(パーフルオロオクチル)プロペン[C17CH=CHCH、沸点91.7℃/50torr]756gを得た。収率は89.7%であった。
【0033】
[例4]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンの合成
撹拌機、ジムロート、滴下ロート付きの500mLの三つ口フラスコに、t−BuOK40gとtert−ブチルアルコール(以下、t−BuOHという)500mL、1−(パーフルオロオクチル)プロペン92gを加え、150℃にて2時間撹拌し、その後、反応生成物からt−BuOHを水で抽出、除去し、減圧蒸留することによって、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン[C15CF=CHCH=CH]53gを得た。収率は60.2%であった。
【0034】
[例5(参考例)]3−(パーフルオロヘキシル)プロペンの合成
撹拌機、ジムロート、滴下ロート付きの2Lの三つ口フラスコに、パーフルオロヘキシルヨージド1870g、AIBN20gを入れ、70℃にて窒素下にて酢酸アリル545gを6時間かけて滴下した。滴下開始から5、10時間目にAIBN各20gを追加添加し、15時間反応させ酢酸アリル付加物を得た。
【0035】
亜鉛粉末352gとメタノール800mLを入れた別のフラスコに得られた酢酸アリル付加物をメタノール還流温度で滴下し、滴下終了後1時間反応を継続した。反応後、相分離した下層の反応生成物を減圧蒸留して、3−(パーフルオロヘキシル)プロペン[C13CHCH=CH、沸点74℃/125torr]1058.3gを得た。収率は70.1%であった。
【0036】
[例6]1−フルオロ−1−(パーフルオロペンチル)ブタ−1,3−ジエンの合成
撹拌機、ジムロート、滴下ロート付きの500mL三つ口フラスコに、KOH84gとIPA80mLを入れ、撹拌下で3−(パーフルオロヘキシル)プロペン360gを滴下した。反応により発熱するため、約1時間かけてゆっくり滴下し、その後70℃で2時間反応を継続した。
【0037】
その後、反応生成物からIPAを水で抽出除去し、減圧蒸留し、1−フルオロ−1−(パーフルオロペンチル)ブタ−1,3−ジエン[C11CF=CHCH=CH、沸点59.3℃/70torr]294.8gを得た。収率は86.7%であった。
19F−NMRによれば、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンはシス体、トランス体の混合物であり、シス体/トランス体比は約1/9であった。
【0038】
19F−NMR(溶媒:CDCOCD)δ(ppm):−81(3F、CF−)、−114.5(0.1F、−CF=CH−(cis))、−117(2F、CF−CF−)、−123(4F、−CF−)、−126(2F、−CF−CF=)、−130.5(0.9F、−CF=CH−(trans))、
1H−NMR(溶媒:CDCOCD)δ(ppm):5.4〜5.9(2H、CH=)、6.2〜7.0(2H、=CH−CH=)。
【0039】
[例7(参考例)]3−(パーフルオロブチル)プロペンの合成
撹拌機、ジムロート、滴下ロート付きの2Lの三つ口フラスコに、パーフルオロブチルヨージド1962g、AIBN20gを入れ、70℃にて窒素下にて酢酸アリル681gを6時間かけて滴下した。滴下開始から5、10時間目にAIBN各20gを追加添加し、15時間反応させ酢酸アリル付加物を得た。
【0040】
亜鉛粉末415gとメタノール800mLを入れた別のフラスコに、得られた酢酸アリル付加物をメタノール還流温度で滴下し、その後1時間反応を継続した。反応後、相分離した下層の反応生成物を減圧蒸留して、3−(パーフルオロブチル)プロペン[CCHCH=CH、沸点81.8℃]998gを得た。収率は97.6%であった。
【0041】
[例8]1−フルオロ−1−(パーフルオロプロピル)ブタ−1,3−ジエンの合成
撹拌機、ジムロート、滴下ロート付きの500mLの三つ口フラスコに、KOH126gとIPA80mLを入れ、撹拌下に3−(パーフルオロブチル)プロペン390gを滴下した。反応により発熱するため、約1時間かけてゆっくり滴下した後、70℃にて2時間反応を継続した。
【0042】
その後、反応生成物からIPAを水で抽出除去し、減圧蒸留することによって、1−フルオロ−1−(パーフルオロプロピル)ブタ−1,3−ジエン[CCF=CHCH=CH、沸点81.2℃]238.5gを得た。収率は66.2%であった。
19F−NMRによれば、1−フルオロ−1−(パーフルオロプロピル)ブタ−1,3−ジエンはシス体、トランス体の混合物であり、シス体/トランス体比は約1/9であった。
【0043】
19F−NMR(溶媒:CDCOCD)δ(ppm):−81(3F、CF−)、−115.5(0.1F、−CF=CH−(cis))、−118(2F、CF−CF−)、−127.5(2F、−CF−CF=)、−130.5(0.9F、−CF=CH−(trans))、
1H−NMR(溶媒:CDCOCD)δ(ppm):5.4〜5.9(2H、CH=)、6.2〜7.0(2H、=CH−CH=)。
【0044】
[例9]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンの重合
50mLフラスコ中に1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン20gとIPP0.3gを加え、窒素気流下50℃にて24時間重合を行った。重合後、未反応単量体を減圧留去し、HCFC225cbに溶解し、IPAを加え沈殿させて精製した後、60℃で12時間減圧乾燥して重合体9.6gを得た。重合収率は48%であった。
【0045】
重合体はガム状でフッ素系溶剤に可溶であり、アセトンなどのケトン系溶剤に膨潤した。フッ素系溶剤に可溶であり、ゲル分がないことから、重合中に三次元架橋が起きていないことがわかった。得られた重合体はガラス転移温度8℃の非晶質重合体であり、空気中での10重量%熱減量温度は294℃であった。
【0046】
HCFC225cbを溶媒としたGPCによるポリメチルメタクリレート換算分子量(以下、Mnという)は約19500であった。また、19F−NMRにて、=CF−に由来するピークが消失していたこと、>CF−に由来する−174ppmのピークが観察されること、13C−NMRにて、>CH−に由来するピークが観察されないことから、1,4−重合様式のみからなる重合体であることがわかった。得られた重合体をガラス板上にキャストし、水に対する接触角を測定したところ、104度であり高い撥水性を示した。
【0047】
19F−NMR(溶媒:CClFCClF/CDCOCD=1/1(重量比)混合溶媒)δ(ppm):−81(3F、CF−)、−118(2F、CF−CF−)、−122〜−127(10F、−CF−、および>CF−CF−)、−174(1F、>CF−)。
【0048】
[例10]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンの重合
50mLフラスコ中に1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン20gとAIBN0.3gを加え、窒素気流下80℃にて24時間重合を行った。重合後、未反応単量体を減圧留去し、HCFC225cbに溶解し、IPAを加え沈殿させて精製した後、60℃で12時間減圧乾燥して重合体15.8gを得た。重合収率は79%であった。HCFC225cbを溶媒としたGPCによるMnは約77900であった。
【0049】
[例11]1−フルオロ−1−(パーフルオロペンチル)ブタ−1,3−ジエンの重合
50mLフラスコ中に1−フルオロ−1−(パーフルオロペンチル)ブタ−1,3−ジエン20gとIPP0.3gを加え、窒素気流下50℃にて24時間重合を行った。重合後、未反応単量体を減圧留去し、HCFC225cbに溶解し、IPAを加え沈殿させて精製した後、60℃で12時間減圧乾燥して、重合体13.3gを得た。重合収率は66.6%であった。重合体は水飴状で、フッ素系溶剤に可溶であり、アセトンなどのケトン系溶剤に膨潤した。
【0050】
フッ素系溶剤に溶剤に可溶であり、ゲル分がないことから、重合中に三次元架橋が起きていないことがわかった。得られた重合体はガラス転移温度8℃の非晶質重合体であり、空気中での10重量%熱減量温度は304℃であり、Mnは約9800であった。
【0051】
また、19F−NMRにて、=CF−に由来するピークが消失していたこと、>CF−に由来する−174ppmのピークが観察されること、13C−NMRにて、>CH−に由来するピークが観察されないことから、1,4−重合様式のみからなる重合体であることがわかった。得られた重合体をガラス板上にキャストし、水に対する接触角を測定したところ、102度であり高い撥水性を示した。
【0052】
19F−NMR(溶媒:CClFCClF/CDCOCD=1/1(重量比)混合溶媒)δ(ppm):−81(3F、CF−)、−117(2F、CF−CF−)、−123〜126(6F、−CF−、および>CF−CF−)、−174(1F、>CF−)。
【0053】
[例12]1−フルオロ−1−(パーフルオロプロピル)ブタ−1,3−ジエンの重合
50mLフラスコ中に1−フルオロ−1−(パーフルオロプロピル)ブタ−1,3−ジエン20gとIPP0.3gを加え、窒素気流下50℃にて24時間重合を行った。重合後、未反応単量体を減圧留去し、HCFC225cbに溶解し、IPAを加え沈殿させて精製した後、60℃で12時間減圧乾燥して重合体8.8gを得た。重合収率は44%であった。重合体は水飴状で、フッ素系溶剤に可溶であり、アセトンなどのケトン系溶剤に膨潤した。
【0054】
フッ素系溶剤に可溶で、ゲル分がないことから、重合中に三次元架橋が起きてていないことがわかった。得られた重合体はガラス転移温度8℃の非晶質重合体であり、空気中での10重量%熱減量温度は296℃であり、Mnは約7700であった。
【0055】
また、19F−NMRにて、=CF−に由来するピークが消失していたこと、>CF−に由来する−174ppmのピークが観察されること、13C−NMRにて、>CH−に由来するピークが観察されないことから、1,4−重合様式のみからなる重合体であることがわかった。得られた重合体をガラス板上にキャストし、水に対する接触角を測定したところ、97度であり高い撥水性を示した。
【0056】
19F−NMR(溶媒:CClFCClF/CDCOCD=1/1(重量比)混合溶媒)δ(ppm):−81(3F、CF−)、−118(2F、CF−CF−)、−128(2F、−CF−、および−CF−CF<)、−174(1F、>CF−)。
【0057】
[例13]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンとTFEとの共重合
200mLのステンレス製オートクレーブに1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン20gとH(CFF20g、および開始剤(パーロイルIB、日本油脂製)0.4gを仕込み、TFEで反応器内を置換した後、80℃のTFEによる圧力が8kg/cmGとなるようにTFEを圧入し、撹拌下に24時間重合を行った。その後、TFEをパージし、IPAを加え沈殿させて精製した後、60℃で12時間減圧乾燥して、重合体7.6gを得た。
【0058】
この重合体は、全フッ素分析により求めた組成が、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンに基づく繰り返し単位/TFEに基づく繰り返し単位=96/4(モル比)であり、Mnは約17100であった。
【0059】
[例14]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンとメチルアクリレートとの共重合
50mLフラスコ中に1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン15g、メチルアクリレート3.1gおよびIPP0.3gを加え、窒素気流下50℃にて24時間重合を行った。重合後、未反応単量体を減圧留去し、HCFC225cbに溶解し、IPA/メタノールが1/1(重量比)の混合溶媒を加え沈殿させて精製した後、60℃で12時間減圧乾燥して重合体12.8gを得た。重合収率は70.7%であった。
【0060】
重合体は水飴状で、フッ素系溶剤に可溶であり、アセトンなどのケトン系溶剤に膨潤した。また、含フッ素ジエン化合物の単独重合体に対して溶解性を有さないIPAに対して膨潤し、共重合が進行したことがわかった。
【0061】
この重合体は、全フッ素分析により求めた組成が、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンに基づく繰り返し単位/メチルアクリレートに基づく繰り返し単位=58/42(モル比)であり、Mnは約11100であった。
【0062】
[例15]1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンとスチレンとの共重合
50mLフラスコ中に1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエン37g、スチレン8.8g、HCFC225cbの25g、およびIPP0.3gを加え、窒素気流下50℃にて5時間重合を行った。重合後、未反応単量体を減圧留去し、HCFC225cbに溶解し、IPA/メタノールが1/1(重量比)の混合溶媒を加え沈殿させて精製した後、60℃で12時間減圧乾燥して重合体11.5gを得た。重合収率は25.1%であった。重合体は固体状であった。
【0063】
この重合体は、全フッ素分析により求めた組成が、1−フルオロ−1−(パーフルオロヘプチル)ブタ−1,3−ジエンに基づく繰り返し単位/スチレンに基づく繰り返し単位=60/40(モル比)であり、Mnは約11100であった。
【0064】
【発明の効果】
置換基としてポリフルオロアルキル基を有する含フッ素ジエン化合物の重合体は、フッ素含有量が高く、耐熱性、耐油性、撥水性などが優れる。[0001]
BACKGROUND OF THE INVENTION
  The present invention is a novel fluorine-containing conjugated diene compound.ThingManufacturing methodTo the lawRelated.
[0002]
[Prior art]
  It is known that perfluorodiene compounds having double bonds at both ends of the molecule have low polymerization reactivity and can be polymerized under special conditions to obtain cyclized polymers or partially three-dimensional polymers. (LA Wall, Fluoro Polymer, Wiley-Interscience, 4, High Pressure Polymerization, p. 127). In addition, it is known that a fluorine-based compound having two types of double bonds having different reactivities undergoes cyclopolymerization to obtain an amorphous fluorine polymer (Japanese Patent Laid-Open Nos. 63-238115 and 63). 63-238111).
[0003]
  There have been many reports on fluorine-containing butadiene. For example, for perfluorobutadiene, a polymer having a relatively low molecular weight can be obtained in a low yield only by anionic polymerization.
  Many compounds in which several hydrogen atoms of butadiene are substituted with fluorine atoms are also known, and polymers thereof are also known (USP 2915508 and the like). Although this fluorine-containing butadiene polymer can be used as an elastomer, since the fluorine atom content is low, heat resistance, oil resistance, water repellency and the like are not sufficient.
[0004]
  However, a conjugated butadiene compound having a substituent having a relatively large number of carbon atoms is not known, and in particular, a butadiene compound having a fluorine-containing substituent is not known. Also, these polymers are not known.
  Further, as a polymer having a fluoroalkyl group, particularly a fluoroalkyl group having a relatively large number of carbon atoms in the side chain, only a fluoroalkyl group-containing acrylate polymer, a fluoroalkyl group-containing silicone polymer, etc. are known. So-called olefin polymers containing a fluorine-containing substituent having a large number of carbon atoms are not known.
[0005]
[Problems to be solved by the invention]
  An object of the present invention is to provide a novel fluorine-containing conjugated diene compound having a fluoroalkyl group as a substituent and a method for producing the same, and a polymer of the fluorine-containing conjugated diene compound and a method for producing the same. Since the polymer of the present invention has a fluoroalkyl group as a substituent, the fluorine content in the polymer is high, and is excellent in heat resistance, oil resistance, water repellency and the like.
[0006]
[Means for Solving the Problems]
  The present invention,formulaThe fluorine-containing olefin represented by 2 (hereinafter referred to as fluorine-containing olefin (formula 2)) or the fluorine-containing olefin represented by formula 3 (hereinafter referred to as fluorine-containing olefin (formula 3)) is removed in the presence of a basic compound. HF reaction, Represented by Equation 1Fluorine-containing diene compoundThingA manufacturing method is provided.
  R f CF = CHCH = CH 2 ... Formula 1
  RfCF2CH2CH = CH2      ... Formula 2
  RfCF2CH = CHCH3       ... Formula 3
0007]
0008]
[0009]
DETAILED DESCRIPTION OF THE INVENTION
  The fluorine-containing diene compound (Formula 1) of the present invention is a conjugated compound and has double bonds at the 1-position and 3-position.
  R in Formula 1 to Formula 5fIs a C1-C11 polyfluoroalkyl group. When the carbon number of the polyfluoroalkyl group is 12 or more, the solubility of the fluorinated diene compound in an organic solvent is lowered, so that the synthesis becomes difficult, and the reaction activity of the fluorinated diene compound in polymerization tends to be lowered.
[0010]
  The polyfluoroalkyl group is preferably a polyfluoroalkyl group in which 60 to 100%, preferably 80 to 100%, of the hydrogen atoms in the corresponding alkyl group are substituted with fluorine atoms. Furthermore, some or all of the remaining hydrogen atoms may be substituted with halogen atoms other than fluorine atoms such as chlorine atoms.
[0011]
  When the carbon number of the polyfluoroalkyl group is 3 or more, the polyfluoroalkyl group may be branched or linear. A more preferred polyfluoroalkyl group is a linear polyfluoroalkyl group.
  The polyfluoroalkyl group is preferably a perfluoroalkyl group having 3 to 9 carbon atoms because the fluorine content in the polymer becomes high and the heat resistance, oil resistance, water repellency and the like of the polymer are improved. Moreover, a linear perfluoroalkyl group is preferable.
[0012]
  The fluorinated diene compound (Formula 1) of the present invention can be produced, for example, by subjecting a fluorinated olefin (Formula 2) or a fluorinated olefin (Formula 3) to a deHF reaction in the presence of a basic compound.
[0013]
  Fluorine-containing olefin (Formula 2) is RfCF2It is obtained by radically adding allyl halide such as allyl chloride or allyl acetate to I and then treating with zinc or the like. Alternatively, allyl alcohol can be added instead of allyl acetate, followed by acetylation and treatment with zinc. RfCF2CH = CH2It can also be obtained by radically adding methanol to acetylation followed by acetylation followed by deacetic acid.
  Fluorine-containing olefin (Formula 3) is RfCF2It is obtained by adding propylene to I and de-HI with a basic compound.
[0014]
  The reaction between the fluorinated olefin (Formula 2) or the fluorinated olefin (Formula 3) and the basic compound is a homogeneous system using isopropyl alcohol (hereinafter referred to as IPA) or the like, or water or methanol as the solvent. Progress in a homogeneous system. In a heterogeneous reaction, a phase transfer catalyst such as an alkyl ammonium salt is used. In general, high conversion and selectivity can be obtained in a homogeneous reaction. In particular, it is preferable to use IPA as a solvent.
[0015]
  Examples of the basic compound include potassium hydroxide (hereinafter referred to as KOH), alkali metal hydroxide such as sodium hydroxide, alkaline earth metal hydroxide such as calcium hydroxide and magnesium hydroxide, tert-butoxy potassium (hereinafter referred to as potassium hydroxide). , T-BuOK), and other organic amine compounds such as triethylamine and pyridine.
[0016]
  From the viewpoint of the conversion rate of the reaction product and the selectivity of the product, KOH and sodium hydroxide are preferably used for the reaction with the fluorinated olefin (formula 2). For the reaction with the fluorinated olefin (formula 3), the fluorinated olefin (formula 3) has a slightly low reactivity, so that relatively basic and strong t-BuOK is preferably used.
  In the case of a fluorine-containing olefin (Formula 2), the reaction temperature is preferably in the range of 40 to 100 ° C. In the case of a fluorine-containing olefin (Formula 3), the range of 40 to 150 ° C is preferable.
[0017]
  Furthermore, the fluorine-containing diene compound (Formula 1) of the present invention is RfCF2After allyl alcohol is added to I, and then iodine in the adduct is reduced, the hydroxyl group is halogenated with hydrogen bromide, etc., then reacted with a basic compound, and dehydrofluorination, dehydrobromide, etc. in a one-step reaction Can be obtained by dehalogenation.
[0018]
  Of the present inventionObtained by manufacturing methodThe fluorinated diene compound (Formula 1) has high polymerizability, and a polymer having polymer units based on the fluorinated diene compound (Formula 1) is obtained.
  the abovePolymerAsHas at least repeating units (formula 4) and / or repeating units (formula 5)Things can be mentioned. The repeating unit (Formula 4) has a structure in which the fluorine-containing diene compound (Formula 1) is polymerized in a 1,4-polymerization mode, and the repeating unit (Formula 5) has a structure in which the polymer is polymerized in a 1,2-polymerization mode. .
[1]
Figure 0004081905
[0019]
  the aboveThe molecular weight of the polymer is 5 × 103~ 1x107It is. 1 × 107If it is larger, the production of the polymer becomes difficult, and 5 × 103If it is smaller, the polymer has low thermal stability and tends to decompose.
  In addition, the present inventionObtained by manufacturing methodThe polymer may contain a repeating unit based on another monomer in addition to the repeating unit (Formula 4) and the repeating unit (Formula 5).
[0020]
  Other monomers include tetrafluoroethylene (hereinafter referred to as TFE), chlorotrifluoroethylene, vinylidene fluoride, vinyl fluoride, hexafluoropropylene and other fluorinated olefins, ethylene, propylene and other hydrocarbon olefins, Examples include (meth) acrylates such as methyl (meth) acrylate and fluoroalkyl (meth) acrylate, acrylic compounds such as (meth) acrylonitrile, styrene and its derivatives, and the like. Another preferred monomer is a fluorine-containing olefin. In addition, the proportion of repeating units based on other monomers in the polymer is preferably 50 mol% or less with respect to all repeating units.
[0021]
  the aboveThe polymer can be obtained by various polymerization methods such as ionic polymerization and radical polymerization. It is preferable to obtain a polymer by a radical polymerization method that can be polymerized under a particularly mild condition using a radical initiator. For the polymerization, polymerization modes such as bulk polymerization, solution polymerization, suspension polymerization, and emulsion polymerization can be adopted.
[0022]
  As the radical initiator, a water-soluble initiator or an oil-soluble initiator is selected and used according to the polymerization mode. The polymer of the present invention can be polymerized using a general radical initiator. For example, in emulsion polymerization, water-soluble peroxides such as potassium persulfate, ammonium persulfate, and disuccinic acid peroxide are used. In suspension polymerization, solution polymerization, or bulk polymerization, non-fluorine peroxides such as diisopropyl peroxydicarbonate (hereinafter referred to as IPP), benzoyl peroxide, and fluorine-based peroxides such as perfluorobutanoic acid peroxide. And azo compounds such as azobisisobutyronitrile (hereinafter referred to as AIBN).
[0023]
  In solution polymerization, as a solvent, CClF2CF2CHClF (hereinafter referred to as HCFC225cb), F (CF2)8F, H (CF2)6A fluorine-based solvent such as F is preferably used.
  The polymerization temperature is preferably 50 to 100 ° C. in radical polymerization.
[0024]
  the aboveThe polymer has flexibility and is excellent in heat resistance, water repellency and oil resistance by having a polyfluoroalkyl group. Since it is soluble in fluorine-based solvents, it is useful as a paint or coating material excellent in weather resistance, water repellency, and non-adhesiveness. Further, since it has a high fluorine content, it has a low dielectric constant and is useful as a low dielectric constant film.
[0025]
  Copolymers for modifying general-purpose resins such as polybutadiene, nitrile rubber, styrene / butadiene copolymer, etc., because they have double bonds in the polymer and can easily perform cross-linking reactions and functional group introductions. It is also useful as a monomer, and a polyfluoroalkyl group can be easily introduced into a polymer.
[0026]
【Example】
Example 1 (Reference Example) Synthesis of 3- (perfluorooctyl) propene
  2 kg of perfluorooctyl iodide and 20 g of AIBN were placed in a 2 L three-necked flask equipped with a stirrer, Dimroth, and dropping funnel, and 440 g of allyl acetate was added dropwise at 70 ° C. over 6 hours under nitrogen. At 5 and 10 hours from the start of the addition, 20 g of AIBN was additionally added and reacted for 15 hours to obtain an allyl acetate adduct.
[0027]
  The allyl acetate adduct was added dropwise to another flask containing 300 g of zinc powder and 500 mL of methanol while maintaining the methanol reflux temperature, and the reaction was continued for 1 hour after completion of the addition. After the reaction, the phase-separated lower layer reaction product was distilled under reduced pressure to give 3- (perfluorooctyl) propene [C8F17CH2CH = CH2, Boiling point 68.5 ° C./20 torr], 1340 g. The yield was 79.5%.
[0028]
[Example 2] Synthesis of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene
  To a 2 L three-necked flask equipped with a stirrer, a Dimroth and a dropping funnel, 165 g of KOH and 500 ml of IPA were added, and 920 g of 3- (perfluorooctyl) propene was added dropwise with stirring. Since the reaction generated heat, the solution was slowly added dropwise over about 1 hour, and then the reaction was continued at 70 ° C. for 2 hours.
[0029]
  Thereafter, IPA is extracted and removed from the reaction product with water and distilled under reduced pressure to give 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene [C7F15CF = CHCH = CH2, Boiling point 65.5 ° C./20 torr], 677.8 g. The yield was 77.0%.
  19According to F-NMR, 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene was a mixture of cis isomer and trans isomer, and the cis / trans isomer ratio was about 1/9. .
[0030]
  19F-NMR (solvent: CD3COCD3) Δ (ppm): -81 (3F, CF3-), -115.5 (0.1F, -CF = CH- (cis)), -118 (2F, CF3-CF2-), -122 to 124 (8F, -CF2-), -126.5 (2F, -CF2-CF =), -130.5 (0.9F, -CF = CH- (trans)),
  1H-NMR (solvent: CD3COCD3) Δ (ppm): 5.48-5.76 (2H, CH2=), 6.43-6.81 (2H, = CH-CH =).
[0031]
Example 3 (Reference Example) Synthesis of 1- (perfluorooctyl) propene
  A 2 L stainless steel autoclave was charged with 1 kg of perfluorooctyl iodide and 30 g of AIBN, purged with nitrogen, then 0.5 kg of propylene was injected, and the temperature was raised to 80 ° C. When the temperature reaches 70 ° C., 5 kg / cm2Propylene was added up to G. As the reaction progressed, propylene was post-added to keep the pressure constant. The reaction continued until there was almost no pressure drop. Then, it cooled and purged the unreacted propylene, and the propylene adduct was obtained.
[0032]
  200 g of KOH and 500 mL of methanol were placed in a 2 L three-necked flask equipped with a stirrer, a Dim funnel and a dropping funnel, and the resulting propylene adduct was added dropwise with stirring. The phase-separated lower layer reaction product was distilled to give 1- (perfluorooctyl) propene [C8F17CH = CHCH3, Boiling point 91.7 ° C./50 torr], 756 g. The yield was 89.7%.
[0033]
Example 4 Synthesis of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene
  To a 500 mL three-necked flask equipped with a stirrer, a Dimroth, and a dropping funnel, add 40 g of t-BuOK, 500 mL of tert-butyl alcohol (hereinafter referred to as t-BuOH), and 92 g of 1- (perfluorooctyl) propene. Then, t-BuOH is extracted from the reaction product with water, removed, and distilled under reduced pressure to give 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene [C7F15CF = CHCH = CH2] 53 g were obtained. The yield was 60.2%.
[0034]
Example 5 (Reference Example) Synthesis of 3- (perfluorohexyl) propene
  1870 g of perfluorohexyl iodide and 20 g of AIBN were placed in a 2 L three-necked flask equipped with a stirrer, a Dim funnel and a dropping funnel, and 545 g of allyl acetate was added dropwise at 70 ° C. over 6 hours under nitrogen. At 5 and 10 hours from the start of the addition, 20 g of AIBN was additionally added and reacted for 15 hours to obtain an allyl acetate adduct.
[0035]
  The allyl acetate adduct obtained in another flask containing 352 g of zinc powder and 800 mL of methanol was added dropwise at the methanol reflux temperature, and the reaction was continued for 1 hour after completion of the addition. After the reaction, the phase-separated lower layer reaction product was distilled under reduced pressure to give 3- (perfluorohexyl) propene [C6F13CH2CH = CH2, Boiling point 74 ° C./125 torr] 1058.3 g. The yield was 70.1%.
[0036]
Example 6 Synthesis of 1-fluoro-1- (perfluoropentyl) buta-1,3-diene
  In a 500 mL three-necked flask equipped with a stirrer, a Dimroth, and a dropping funnel, 84 g of KOH and 80 mL of IPA were added, and 360 g of 3- (perfluorohexyl) propene was added dropwise with stirring. Since the reaction generated heat, the solution was slowly added dropwise over about 1 hour, and then the reaction was continued at 70 ° C. for 2 hours.
[0037]
  Then, IPA is extracted and removed from the reaction product with water, distilled under reduced pressure, and 1-fluoro-1- (perfluoropentyl) buta-1,3-diene [C5F11CF = CHCH = CH2, Boiling point 59.3 ° C./70 torr], 294.8 g. The yield was 86.7%.
  19According to F-NMR, 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene was a mixture of cis isomer and trans isomer, and the cis / trans isomer ratio was about 1/9. .
[0038]
  19F-NMR (solvent: CD3COCD3) Δ (ppm): -81 (3F, CF3-), -114.5 (0.1F, -CF = CH- (cis)), -117 (2F, CF3-CF2-), -123 (4F, -CF2-), -126 (2F, -CF2-CF =), -130.5 (0.9F, -CF = CH- (trans)),
    1H-NMR (solvent: CD3COCD3) Δ (ppm): 5.4 to 5.9 (2H, CH2=), 6.2-7.0 (2H, = CH-CH =).
[0039]
[Example 7 (reference example)] Synthesis of 3- (perfluorobutyl) propene
  In a 2 L three-necked flask equipped with a stirrer, a Dimroth, and a dropping funnel were placed 1962 g of perfluorobutyl iodide and 20 g of AIBN, and 681 g of allyl acetate was added dropwise at 70 ° C. over 6 hours under nitrogen. At 5 and 10 hours from the start of the addition, 20 g of AIBN was additionally added and reacted for 15 hours to obtain an allyl acetate adduct.
[0040]
  The obtained allyl acetate adduct was added dropwise at a methanol reflux temperature to another flask containing 415 g of zinc powder and 800 mL of methanol, and then the reaction was continued for 1 hour. After the reaction, the phase-separated lower layer reaction product was distilled under reduced pressure to give 3- (perfluorobutyl) propene [C4F9CH2CH = CH2, Boiling point 81.8 ° C.], 998 g was obtained. The yield was 97.6%.
[0041]
Example 8 Synthesis of 1-fluoro-1- (perfluoropropyl) buta-1,3-diene
  In a 500 mL three-necked flask equipped with a stirrer, a Dimroth, and a dropping funnel, 126 g of KOH and 80 mL of IPA were added, and 390 g of 3- (perfluorobutyl) propene was added dropwise with stirring. Since the reaction generated heat, the solution was dropped slowly over about 1 hour, and then the reaction was continued at 70 ° C. for 2 hours.
[0042]
  Thereafter, IPA is extracted and removed from the reaction product with water and distilled under reduced pressure to give 1-fluoro-1- (perfluoropropyl) buta-1,3-diene [C3F7CF = CHCH = CH2, Boiling point 81.2 ° C.], 238.5 g. The yield was 66.2%.
  19According to F-NMR, 1-fluoro-1- (perfluoropropyl) buta-1,3-diene was a mixture of a cis isomer and a trans isomer, and the cis isomer / trans isomer ratio was about 1/9. .
[0043]
  19F-NMR (solvent: CD3COCD3) Δ (ppm): -81 (3F, CF3-), -115.5 (0.1F, -CF = CH- (cis)), -118 (2F, CF3-CF2-), -127.5 (2F, -CF2-CF =), -130.5 (0.9F, -CF = CH- (trans)),
  1H-NMR (solvent: CD3COCD3) Δ (ppm): 5.4 to 5.9 (2H, CH2=), 6.2-7.0 (2H, = CH-CH =).
[0044]
Example 9 Polymerization of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene
  In a 50 mL flask, 20 g of 1-fluoro-1- (perfluoroheptyl) but-1,3-diene and 0.3 g of IPP were added, and polymerization was performed at 50 ° C. for 24 hours under a nitrogen stream. After the polymerization, unreacted monomers were distilled off under reduced pressure, dissolved in HCFC225cb, purified by adding IPA, and then dried under reduced pressure at 60 ° C. for 12 hours to obtain 9.6 g of a polymer. The polymerization yield was 48%.
[0045]
  The polymer was gum-like and soluble in fluorine-based solvents, and swelled in ketone-based solvents such as acetone. Since it is soluble in a fluorine-based solvent and has no gel content, it was found that no three-dimensional crosslinking occurred during the polymerization. The obtained polymer was an amorphous polymer having a glass transition temperature of 8 ° C., and the 10 wt% heat loss temperature in air was 294 ° C.
[0046]
  The molecular weight in terms of polymethyl methacrylate (hereinafter referred to as Mn) by GPC using HCFC225cb as a solvent was about 19500. Also,19The peak derived from = CF- disappeared in F-NMR, the peak at -174 ppm derived from> CF- was observed, and the peak derived from> CH- in 13C-NMR. Since it was not observed, it turned out that it is a polymer which consists only of 1, 4- polymerization modes. When the obtained polymer was cast on a glass plate and the contact angle with water was measured, it was 104 degrees and showed high water repellency.
[0047]
  19F-NMR (solvent: CCl2FCClF2/ CD3COCD3= 1/1 (weight ratio) mixed solvent) δ (ppm): -81 (3F, CF3-), -118 (2F, CF3-CF2-), -122 to -127 (10F, -CF2-, And> CF-CF2-), -174 (1F,> CF-).
[0048]
Example 10 Polymerization of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene
  In a 50 mL flask, 20 g of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene and 0.3 g of AIBN were added, and polymerization was performed at 80 ° C. for 24 hours in a nitrogen stream. After the polymerization, unreacted monomers were distilled off under reduced pressure, dissolved in HCFC225cb, purified by adding IPA and then dried under reduced pressure at 60 ° C. for 12 hours to obtain 15.8 g of a polymer. The polymerization yield was 79%. Mn by GPC using HCFC225cb as a solvent was about 77,900.
[0049]
[Example 11] Polymerization of 1-fluoro-1- (perfluoropentyl) buta-1,3-diene
  In a 50 mL flask, 20 g of 1-fluoro-1- (perfluoropentyl) buta-1,3-diene and 0.3 g of IPP were added, and polymerization was performed at 50 ° C. for 24 hours in a nitrogen stream. After the polymerization, unreacted monomers were distilled off under reduced pressure, dissolved in HCFC225cb, purified by adding IPA and then dried under reduced pressure at 60 ° C. for 12 hours to obtain 13.3 g of a polymer. The polymerization yield was 66.6%. The polymer was syrupy, soluble in fluorine solvents, and swelled in ketone solvents such as acetone.
[0050]
  Since it is soluble in a fluorine-based solvent and has no gel content, it was found that no three-dimensional crosslinking occurred during the polymerization. The obtained polymer was an amorphous polymer having a glass transition temperature of 8 ° C., the 10 wt% heat loss temperature in air was 304 ° C., and Mn was about 9800.
[0051]
  Also,19The peak derived from = CF- disappeared in F-NMR, the peak at -174 ppm derived from> CF- was observed, and the peak derived from> CH- in 13C-NMR. Since it was not observed, it turned out that it is a polymer which consists only of 1, 4- polymerization modes. When the obtained polymer was cast on a glass plate and the contact angle with water was measured, it was 102 degrees and high water repellency was exhibited.
[0052]
  19F-NMR (solvent: CCl2FCClF2/ CD3COCD3= 1/1 (weight ratio) mixed solvent) δ (ppm): -81 (3F, CF3-), -117 (2F, CF3-CF2-), -123 to 126 (6F, -CF2-, And> CF-CF2-), -174 (1F,> CF-).
[0053]
Example 12 Polymerization of 1-fluoro-1- (perfluoropropyl) buta-1,3-diene
  In a 50 mL flask, 20 g of 1-fluoro-1- (perfluoropropyl) but-1,3-diene and 0.3 g of IPP were added, and polymerization was performed at 50 ° C. for 24 hours under a nitrogen stream. After the polymerization, unreacted monomers were distilled off under reduced pressure, dissolved in HCFC225cb, purified by adding IPA, and then dried under reduced pressure at 60 ° C. for 12 hours to obtain 8.8 g of a polymer. The polymerization yield was 44%. The polymer was syrupy, soluble in fluorine solvents, and swelled in ketone solvents such as acetone.
[0054]
  It was found that no three-dimensional crosslinking occurred during the polymerization because it was soluble in a fluorine-based solvent and had no gel content. The obtained polymer was an amorphous polymer having a glass transition temperature of 8 ° C., the 10 wt% heat loss temperature in air was 296 ° C., and Mn was about 7700.
[0055]
  Also,19In F-NMR, the peak derived from = CF- had disappeared, the peak at -174 ppm derived from> CF- was observed,13In C-NMR, since a peak derived from> CH- was not observed, it was found that the polymer was composed only of 1,4-polymerization mode. When the obtained polymer was cast on a glass plate and the contact angle with water was measured, it was 97 ° C. and showed high water repellency.
[0056]
  19F-NMR (solvent: CCl2FCClF2/ CD3COCD3= 1/1 (weight ratio) mixed solvent) δ (ppm): -81 (3F, CF3-), -118 (2F, CF3-CF2-), -128 (2F, -CF2-And -CF2-CF <), -174 (1F,> CF-).
[0057]
Example 13 Copolymerization of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene with TFE
  In a 200 mL stainless steel autoclave, 20 g of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene and H (CF2)6F20 g and an initiator (Perroyl IB, manufactured by NOF Corporation) 0.4 g were charged, and the inside of the reactor was replaced with TFE. Then, the pressure by TFE at 80 ° C. was 8 kg / cm.2TFE was injected so as to be G, and polymerization was performed with stirring for 24 hours. Thereafter, TFE was purged, and IPA was added for precipitation and purification, followed by drying under reduced pressure at 60 ° C. for 12 hours to obtain 7.6 g of a polymer.
[0058]
  This polymer has a composition determined by total fluorine analysis, the repeating unit based on 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene / the repeating unit based on TFE = 96/4 (molar ratio). And Mn was about 17,100.
[0059]
Example 14 Copolymerization of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene and methyl acrylate
  In a 50 mL flask, 15 g of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene, 3.1 g of methyl acrylate and 0.3 g of IPP were added, and polymerization was carried out at 50 ° C. for 24 hours in a nitrogen stream. After the polymerization, unreacted monomers were distilled off under reduced pressure, dissolved in HCFC225cb, purified by adding a mixed solvent of IPA / methanol 1/1 (weight ratio), dried at 60 ° C. under reduced pressure for 12 hours. As a result, 12.8 g of a polymer was obtained. The polymerization yield was 70.7%.
[0060]
  The polymer was syrupy, soluble in fluorine solvents, and swelled in ketone solvents such as acetone. Further, it was found that the copolymer swelled due to swelling with IPA having no solubility in the homopolymer of the fluorine-containing diene compound.
[0061]
  This polymer has a composition determined by total fluorine analysis, the repeating unit based on 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene / the repeating unit based on methyl acrylate = 58/42 (molar ratio). ) And Mn was about 11100.
[0062]
Example 15 Copolymerization of 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene with styrene
  In a 50 mL flask, 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene (37 g), 8.8 g of styrene, 25 g of HCFC225cb, and 0.3 g of IPP were added, and polymerization was performed at 50 ° C. for 5 hours in a nitrogen stream. Went. After polymerization, unreacted monomers are distilled off under reduced pressure, dissolved in HCFC225cb, purified by adding a mixed solvent of IPA / methanol 1/1 (weight ratio), dried at 60 ° C. under reduced pressure for 12 hours. As a result, 11.5 g of a polymer was obtained. The polymerization yield was 25.1%. The polymer was solid.
[0063]
  This polymer has a composition determined by total fluorine analysis, the repeating unit based on 1-fluoro-1- (perfluoroheptyl) buta-1,3-diene / the repeating unit based on styrene = 60/40 (molar ratio). And Mn was about 11100.
[0064]
【The invention's effect】
  A polymer of a fluorinated diene compound having a polyfluoroalkyl group as a substituent has a high fluorine content and is excellent in heat resistance, oil resistance, water repellency and the like.

Claims (1)

式2で表される含フッ素オレフィンまたは式3で表される含フッ素オレフィンを塩基性化合物存在下に脱HF反応させることを特徴とする、式1で表わされる含フッ素ジエン化合物の製造方法(ただし、式1〜3において、R は炭素数1〜11のポリフルオロアルキル基を表す。)
CF=CHCH=CH ・・・式1
CFCHCH=CH ・・・式2
CFCH=CHCH ・・・式3
A process for producing a fluorinated diene compound represented by formula 1, wherein the fluorinated olefin represented by formula 2 or the fluorinated olefin represented by formula 3 is subjected to deHF reaction in the presence of a basic compound (however, In Formulas 1 to 3, R f represents a polyfluoroalkyl group having 1 to 11 carbon atoms.)
R f CF═CHCH═CH 2 Formula 1
R f CF 2 CH 2 CH═CH 2 Formula 2
R f CF 2 CH═CHCH 3 Formula 3
JP04549799A 1999-02-23 1999-02-23 Method for producing fluorine-containing diene compound Expired - Fee Related JP4081905B2 (en)

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JP2003221406A (en) 2002-01-31 2003-08-05 Asahi Glass Co Ltd Aqueous dispersion
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JP5257449B2 (en) * 2008-06-13 2013-08-07 ユニマテック株式会社 Polyfluoroalkadiene mixture and process for producing the same
RU2528334C1 (en) * 2013-05-27 2014-09-10 Закрытое акционерное общество научно-производственное Объединение "ПиМ-Инвест" (ЗАО НПО "Пим-Инвест") Method of synthesysing 6,6,7,7,8,8,8-heptafluoro-5,5-(trifluoromethyl)octadiene-1,3-prospective monomer for fluorine-containing polymers
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