JP3587418B2 - Method for producing vinyl polymer - Google Patents
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- JP3587418B2 JP3587418B2 JP00390097A JP390097A JP3587418B2 JP 3587418 B2 JP3587418 B2 JP 3587418B2 JP 00390097 A JP00390097 A JP 00390097A JP 390097 A JP390097 A JP 390097A JP 3587418 B2 JP3587418 B2 JP 3587418B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、制御された分子量と狭い分子量分布とを有するビニル系重合体の製造方法に関する。
【０００２】
【従来の技術】
重合体の分子量及び分子量分布は、重合体の流動特性等の諸特性に大きな影響を及ぼす。従って、制御された分子量と狭い分子量分布とを有する重合体を得ることは得られた重合体及びその重合体を用いて得られる組成物の諸特性をコントロールするうえで重要な技術である。
【０００３】
制御された分子量と狭い分子量分布とを有するビニル系重合体を簡便に得る方法としては、例えば、Ｊ．Ａｍ．Ｃｈｅｍ．Ｓｏｃ．、１１７、５６１４〜５６１５（１９９５）；Ｍａｃｒｏｍｏｌｅｃｕｌｅｓ、２８、７９０１〜７９１０（１９９５）等には、有機ハロゲン化物を開始剤とし、１価のハロゲン化銅と２，２′−ビピリジル化合物等の電子供与性物質とから得られる１価の銅錯体を触媒として使用してビニル系単量体をリビングラジカル重合させる方法が開示されている。この方法は、スチレン、アクリル酸メチル等に対しては制御された分子量と狭い分子量分布とを有する重合体を与える。
【０００４】
【発明が解決しようとする課題】
しかしながら、この方法により得られるビニル系重合体の分子量分布は充分に狭いものとはいえない。特にアクリル酸ブチル、アクリル酸ヘキシル、アクリル酸−２−エチルヘキシル等のアクリル酸エステル類、又は、メタクリル酸メチル、メタクリル酸エチル等のメタクリル酸エステル類に適用した場合には、得られるビニル系重合体の分子量分布はやや広くなってしまう。従って、更に狭い分子量分布を有するビニル系重合体を得る方法が望まれている。
【０００５】
本発明は、上記に鑑み、制御された分子量と狭い分子量分布とを有するビニル系重合体の製造方法を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
本発明は、有機ハロゲン化物を重合開始剤とし、１価の銅化合物を触媒としてビニル系単量体を重合させるビニル系重合体の製造方法であって、上記重合の際に、２５℃における比誘電率が１０以上の有機化合物を溶媒として用いるビニル系重合体の製造方法である。
【０００７】
以下に本発明を詳述する。
【０００８】
本発明においては、重合開始剤として有機ハロゲン化物を用いる。上記有機ハロゲン化物としては特に限定されず、例えば、四塩化炭素、四臭化炭素、塩化アリル、臭化アリル、ヨウ化アリル、α，α′−ジクロロ−ｏ−キシレン、α，α′−ジクロロ−ｍ−キシレン、α，α′−ジクロロ−ｐ−キシレン、α，α′−ジブロモ−ｏ−キシレン、α，α′−ジブロモ−ｍ−キシレン、α，α′−ジブロモ−ｐ−キシレン等のキシレン誘導体；ｏ−ビス（α−クロロエチル）ベンゼン、ｍ−ビス（α−クロロエチル）ベンゼン、ｐ−ビス（α−クロロエチル）ベンゼン、ｏ−ビス（α−ブロモエチル）ベンゼン、ｍ−ビス（α−ブロモエチル）ベンゼン、ｐ−ビス（α−ブロモエチル）ベンゼン等のベンゼン誘導体；α−クロロ酢酸メチル、α−クロロ酢酸エチル等のα−クロロ酢酸エステル；α，α−ジクロロ酢酸メチル、α，α−ジクロロ酢酸エチル等のα，α−ジクロロ酢酸エステル；α，α，α−トリクロロ酢酸メチル、α，α，α−トリクロロ酢酸エチル等のα，α，α−トリクロロ酢酸エステル；α−クロロプロピオン酸メチル、α−クロロプロピオン酸エチル等のα−クロロプロピオン酸エステル；α−クロロイソ酪酸メチル、α−クロロイソ酪酸エチル等のα−クロロイソ酪酸エステル；α−ブロモ酢酸メチル、α−ブロモ酢酸エチル等のα−ブロモ酢酸エステル；α，α−ジブロモ酢酸メチル、α，α−ジブロモ酢酸エチル等のα，α−ジブロモ酢酸エステル；α，α，α−トリブロモ酢酸メチル、α，α，α−トリブロモ酢酸エチル等のα，α，α−トリブロモ酢酸エステル；α−ブロモプロピオン酸メチル、α−ブロモプロピオン酸エチル等のα−ブロモプロピオン酸エステル；α−ブロモイソ酪酸メチル、α−ブロモイソ酪酸エチル等のα−ブロモイソ酪酸エステル等が挙げられる。これらは単独で用いてもよく、２種以上を併用してもよい。
【０００９】
本発明においては、触媒として１価の銅化合物を用いる。上記銅化合物としては特に限定されず、例えば、塩化第一銅、臭化第一銅、ヨウ化第一銅、シアン化第一銅等が挙げられる。
【００１０】
上記銅化合物は、電子供与性物質と併用することが好ましい。上記電子供与性物質としては特に限定されず、例えば、２，２′−ビピリジル、４，４′−ジメチル−２，２′−ビピリジル等のビピリジル化合物；１，１０−フェナントロリン、４，７−ジメチル−１，１０−フェナントロリン、５，６−ジメチル−１，１０−フェナントロリン、３，４，７，８−テトラメチル−１，１０−フェナントロリン等のフェナントロリン化合物等の窒素原子含有複素環化合物等が挙げられる。
【００１１】
本発明において用いられるビニル系単量体としては特に限定されず、各種のものを用いることができ、例えば、（メタ）アクリル酸メチル、（メタ）アクリル酸エチル、（メタ）アクリル酸−ｎ−プロピル、（メタ）アクリル酸イソプロピル、（メタ）アクリル酸−ｎ−ブチル、（メタ）アクリル酸イソブチル、（メタ）アクリル酸−ｔ−ブチル、（メタ）アクリル酸−ｎ−ペンチル、（メタ）アクリル酸−ｎ−ヘキシル、（メタ）アクリル酸シクロヘキシル、（メタ）アクリル酸−ｎ−ヘプチル、（メタ）アクリル酸−ｎ−オクチル、（メタ）アクリル酸−２−エチルヘキシル、（メタ）アクリル酸ノニル、（メタ）アクリル酸デシル、（メタ）アクリル酸ドデシル、（メタ）アクリル酸フェニル等の（メタ）アクリル酸エステル類；スチレン、２−メチルスチレン、３−メチルスチレン、４−メチルスチレン、２−クロロスチレン、３−クロロスチレン、４−クロロスチレン、２−（クロロメチル）スチレン、３−（クロロメチル）スチレン、４−（クロロメチル）スチレン、２−メトキシスチレン、３−メトキシスチレン、４−メトキシスチレン、２−（メトキシカルボニル）スチレン、３−（メトキシカルボニル）スチレン、４−（メトキシカルボニル）スチレン、α−メチルスチレン等のスチレン誘導体；無水マレイン酸等が挙げられる。これらは単独で用いてもよく、２種以上を併用してもよい。
【００１２】
本発明においては、上記ビニル系単量体を重合させる際に、溶媒として２５℃で測定した比誘電率が１０以上の有機化合物を用いる。
上記２５℃で測定した比誘電率が１０以上の有機化合物としては特に限定されないが、本発明においては、下記一般式（１）で表されるカルボニル化合物を好適に用いることができる。
【００１３】
【化２】
式中、Ｒ１ 、Ｒ２ は、同一又は異なって、水素、炭素数１〜１０のアルキル基、炭素数１〜１０のアリール基又は炭素数１〜１０のアラルキル基である。
このようなカルボニル化合物の具体例としては特に限定されず、例えば、アセトン、２−ブタノン、２−ペンタノン、３−ペンタノン、２−ヘキサノン、２−ヘプタノン、４−メチル−２−ペンタノン等の非環状脂肪族ケトン類；シクロヘキサノン、２−メチルシクロヘキサノン、３−メチルシクロヘキサノン、４−メチルシクロヘキサノン等の環状脂肪族ケトン類；アセトフェノン、２−メチルアセトフェノン、３−メチルアセトフェノン、４−メチルアセトフェノン等の芳香族ケトン類等を挙げることができる。
【００１５】
また、上記２５℃で測定した比誘電率が１０以上の有機化合物としては、下記一般式（２）で表されるニトロ化合物を好適に用いることができる。
Ｒ３ −ＮＯ２ （２）
式中、Ｒ３ は、炭素数１〜１０のアルキル基、炭素数１〜１０のアリール基又は炭素数１〜１０のアラルキル基である。
【００１６】
このようなニトロ化合物の具体例としては特に限定されず、例えば、ニトロメタン、ニトロエタン、ニトロプロパン、ニトロベンゼン等が挙げられる。
【００１７】
また、上記２５℃で測定した比誘電率が１０以上の有機化合物としては、下記一般式（３）で表されるニトリル化合物を好適に用いることができる。
Ｒ３ −ＣＮ （３）
式中、Ｒ３ は、上記一般式（２）における場合と同じ。
このようなニトリル化合物の具体例としては特に限定されず、例えば、アセトニトリル、プロピオニトリル、ベンゾニトリル等が挙げられる。
【００１８】
また、上記２５℃で測定した比誘電率が１０以上の有機化合物としては、下記一般式（４）で表されるアルコール化合物を好適に用いることができる。
Ｒ３ −ＯＨ （４）
式中、Ｒ３ は、上記一般式（２）における場合と同じ。
このようなアルコール化合物の具体例としては特に限定されず、例えば、メタノール、エタノール、１−プロパノール、２−プロパノール、１−ブタノール、シクロヘキシルアルコール、ベンジルアルコール等が挙げられる。
【００１９】
本発明においては、上記一般式（１）で表されるカルボニル化合物、上記一般式（２）で表されるニトロ化合物、上記一般式（３）で表されるニトリル化合物、及び、上記一般式（４）で表されるアルコール化合物を単独で用いてもよいし、２種以上を併用してもよい。
【００２０】
また、上記２５℃で測定した比誘電率が１０以上の有機化合物以外の他の溶媒を併用してもよい。上記他の溶媒としては特に限定されず、例えば、ヘキサン、トルエン、酢酸エチル、テトラヒドロフラン等の有機化合物等が挙げられる。
上記他の溶媒を用いる場合においては、上記２５℃で測定した比誘電率が１０以上の有機化合物は、全溶媒量の１０〜１００体積％含有されることが好ましい。１０体積％未満であると、得られるビニル系重合体の分子量分布が広くなる。
【００２１】
本発明においては、上記ビニル系単量体を重合させる際に用いられる全溶媒量は特に限定されないが、適度な反応速度を達成するために、上記ビニル系単量体の体積の０．５〜１０倍量が好ましい。
【００２２】
上記ビニル系単量体を重合させる際において、上記重合の温度は、上記ビニル系単量体の種類等に応じて適宜に設定することができるが、一般には、６０〜１５０℃が好ましい。
【００２３】
【実施例】
以下に実施例を掲げて本発明を更に詳しく説明するが、本発明はこれら実施例にのみ限定されるものではない。
【００２４】
実施例１
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（１０ｍＬ、９．９４ｇ、６９．８ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（３７０ｍｇ、１．４ｍｍｏｌ）、臭化第一銅（２００ｍｇ、１．４ｍｍｏｌ）、２，２′−ビピリジル（６５２ｍｇ、４．２ｍｍｏｌ）、及び、アセトン（比誘電率２０．７０、１０ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、３時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）４．２６ｇを得た（重合収率４７．６％）。
【００２５】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は３９００、分散度（Ｍｗ／Ｍｎ）は１．１７であった。
【００２６】
実施例２
３０ｍＬの耐圧ガラス反応容器に、アクリル酸メチル（３．１ｍＬ、３．０ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、４−メチル−２−ペンタノン（２０℃における比誘電率１３．１１、３．１４ｍＬ）を仕込み、窒素ガスを１０分間吹き込んで溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、０．５時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸メチル）２．０７ｇを得た（重合収率６８．８％）。
【００２７】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は３９００、分散度は１．３１であった。
実施例３
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、及び、アセトニトリル（比誘電率３６．０、５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１５０℃に加熱し、９時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）１．４１ｇを得た（重合収率３１．５％）。
【００２８】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は２８００、分散度は１．２１であった。
【００２９】
実施例４
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α−ブロモプロピオン酸エチル（０．０９０ｍＬ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、及び、アセトニトリル（５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、５時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）２．９５ｇを得た（重合収率６６．０％）。
【００３０】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は３６００、分散度は１．１３であった。
【００３１】
実施例５
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、アセトニトリル（２．５ｍＬ）、及び、酢酸エチル（比誘電率６．０２、２．５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、６時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）１．４１ｇを得た（重合収率３１．５％）。
【００３２】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は５１００、分散度は１．１５であった。
【００３３】
実施例６
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、アセトニトリル（１ｍＬ）、及び、酢酸エチル（４ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、２時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）３．７９ｇを得た（重合収率８４．８％）。
【００３４】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は５７００、分散度は１．２６であった。
【００３５】
実施例７
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α−ブロモプロピオン酸エチル（０．０９０ｍＬ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、及び、ベンゾニトリル（比誘電率２５．２０、５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、２時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）２．４８ｇを得た（重合収率５５．５％）。
【００３６】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は３６００、分散度は１．１６であった。
【００３７】
実施例８
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α−ブロモプロピオン酸エチル（０．０９０ｍＬ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、及び、ニトロエタン（３０℃における比誘電率２８．０６、５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、６時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）１．９７ｇを得た（重合収率４４．１％）。
【００３８】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は２０００、分散度は１．２３であった。
【００３９】
実施例９
３０ｍＬの耐圧ガラス反応容器に、アクリル酸メチル（３．１ｍＬ、３．０ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、アセトニトリル（０．６３ｍＬ）、及び、酢酸エチル（２．５１ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、２時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸メチル）２．０９ｇを得た（重合収率７０．０％）。
【００４０】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は４３００、分散度は１．１８であった。
【００４１】
実施例１０
３０ｍＬの耐圧ガラス反応容器に、アクリル酸メチル（３．１ｍＬ、３．０ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、エタノール（比誘電率２４．５５、０．６３ｍＬ）、及び、酢酸エチル（２．５１ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、２時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸メチル）２．０１ｇを得た（重合収率６７．０％）。
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は３６００、分散度は１．３７であった。
【００４２】
比較例１
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、１時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）４．４５ｇを得た（重合収率９９．６％）。
【００４３】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は６３００、分散度は１．７５であった。
【００４４】
比較例２
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、及び、酢酸エチル（比誘電率６．０２、５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、６時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）４．３１ｇを得た（重合収率９６．４％）。
【００４５】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は６３００、分散度は１．７７であった。
【００４６】
比較例３
３０ｍＬの耐圧ガラス反応容器に、アクリル酸ブチル（５ｍＬ、４．４７ｇ、３４．９ｍｍｏｌ）、α，α′−ジブロモ−ｐ−キシレン（１８５ｍｇ、０．７０ｍｍｏｌ）、臭化第一銅（１００ｍｇ、０．７０ｍｍｏｌ）、２，２′−ビピリジル（３２６ｍｇ、２．１ｍｍｏｌ）、及び、トルエン（比誘電率２．３８、５ｍＬ）を仕込み、真空脱気を３回行って溶存酸素を除去した後、封管した。混合物を１３０℃に加熱し、４時間反応させた。混合物を酢酸エチルで希釈し、１０％塩酸で３回、ブラインで１回洗浄した。有機層を無水硫酸ナトリウムで乾燥した後、溶媒を減圧下留去し、ポリ（アクリル酸ブチル）４．４１ｇを得た（重合収率９８．７％）。
【００４７】
ＧＰＣ測定（ポリスチレン換算）により求めた重合体の数平均分子量は５８００、分散度は１．９２であった。
【００４８】
結果をまとめたものを表１に示す。なお、表１中、ＢＡはアクリル酸ブチル、ＭＡはアクリル酸メチル、ブロムキシレンはα，α′−ジブロモ−ｐ−キシレン、ブロム酸はα−ブロモプロピオン酸エチル、ビピリジルは２，２′−ビピリジルを示す。
【００４９】
【表１】
【発明の効果】
本発明のビニル系重合体の製造方法は、上述の通りであるので、スチレン、（メタ）アクリル酸エステル等のビニル系単量体から制御された分子量と狭い分子量分布とを有する重合体を簡便に得ることができる。更に、本発明により得られるビニル系重合体は分子量分布が狭いので、従来の方法により得られる同じ骨格と分子量とを有する分散度の大きなビニル系重合体よりも粘度が小さくなる。従って、本発明により得られるビニル系重合体は、作業性の優れた樹脂組成物の原料となり得る。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a vinyl polymer having a controlled molecular weight and a narrow molecular weight distribution.
[0002]
[Prior art]
The molecular weight and molecular weight distribution of a polymer greatly affect various properties of the polymer such as flow characteristics. Therefore, obtaining a polymer having a controlled molecular weight and a narrow molecular weight distribution is an important technique for controlling various properties of the obtained polymer and a composition obtained by using the polymer.
[0003]
A method for easily obtaining a vinyl polymer having a controlled molecular weight and a narrow molecular weight distribution is described in, for example, J. Am. Am. Chem. Soc. Macromolecules, 28, 7901-7910 (1995), etc., in which an organic halide is used as an initiator and monovalent copper halide and an electron donor such as a 2,2′-bipyridyl compound are disclosed. There is disclosed a method of subjecting a vinyl monomer to living radical polymerization using a monovalent copper complex obtained from an acidic substance as a catalyst. This method gives polymers having a controlled molecular weight and a narrow molecular weight distribution for styrene, methyl acrylate and the like.
[0004]
[Problems to be solved by the invention]
However, the molecular weight distribution of the vinyl polymer obtained by this method cannot be said to be sufficiently narrow. Especially when applied to acrylates such as butyl acrylate, hexyl acrylate, and 2-ethylhexyl acrylate, or methacrylates such as methyl methacrylate and ethyl methacrylate, the obtained vinyl polymer is obtained. Has a slightly broader molecular weight distribution. Therefore, a method for obtaining a vinyl polymer having a narrower molecular weight distribution is desired.
[0005]
In view of the above, an object of the present invention is to provide a method for producing a vinyl polymer having a controlled molecular weight and a narrow molecular weight distribution.
[0006]
[Means for Solving the Problems]
The present invention relates to a method for producing a vinyl polymer in which a vinyl monomer is polymerized using an organic halide as a polymerization initiator and a monovalent copper compound as a catalyst. This is a method for producing a vinyl polymer using an organic compound having a dielectric constant of 10 or more as a solvent.
[0007]
Hereinafter, the present invention will be described in detail.
[0008]
In the present invention, an organic halide is used as a polymerization initiator. The organic halide is not particularly limited and includes, for example, carbon tetrachloride, carbon tetrabromide, allyl chloride, allyl bromide, allyl iodide, α, α′-dichloro-o-xylene, α, α′-dichloro -M-xylene, α, α'-dichloro-p-xylene, α, α'-dibromo-o-xylene, α, α'-dibromo-m-xylene, α, α'-dibromo-p-xylene, etc. Xylene derivatives; o-bis (α-chloroethyl) benzene, m-bis (α-chloroethyl) benzene, p-bis (α-chloroethyl) benzene, o-bis (α-bromoethyl) benzene, m-bis (α-bromoethyl) ) Benzene derivatives such as benzene and p-bis (α-bromoethyl) benzene; α-chloroacetates such as α-methyl methyl acetate and α-ethyl ethyl acetate; methyl α, α-dichloroacetate; α, α-dichloroacetate such as ethyl α-dichloroacetate; α, α, α-trichloroacetate such as methyl α, α, α-trichloroacetate and ethyl α, α, α-trichloroacetate; α-chloropropion Α-chloropropionate such as methyl acrylate and ethyl α-chloropropionate; α-chloroisobutyrate such as methyl α-chloroisobutyrate and ethyl α-chloroisobutyrate; methyl α-bromoacetate and ethyl α-bromoacetate α, α-bromoacetate; α, α-dibromoacetate, such as methyl α, α-dibromoacetate, α, α-dibromoacetate; methyl α, α, α-tribromoacetate, α, α, α-tribromoacetate Α, α, α-tribromoacetic acid ester such as methyl α-bromopropionate, ethyl α-bromopropionate, etc. Le; alpha-bromoisobutyrate methyl, alpha-bromoisobutyrate such as alpha-bromoisobutyrate ethyl. These may be used alone or in combination of two or more.
[0009]
In the present invention, a monovalent copper compound is used as a catalyst. The copper compound is not particularly limited, and examples thereof include cuprous chloride, cuprous bromide, cuprous iodide, cuprous cyanide, and the like.
[0010]
The copper compound is preferably used in combination with an electron donating substance. The electron donating substance is not particularly limited, and examples thereof include bipyridyl compounds such as 2,2'-bipyridyl and 4,4'-dimethyl-2,2'-bipyridyl; 1,10-phenanthroline, and 4,7-dimethyl Heterocyclic compounds containing nitrogen atoms such as phenanthroline compounds such as -1,10-phenanthroline, 5,6-dimethyl-1,10-phenanthroline and 3,4,7,8-tetramethyl-1,10-phenanthroline. Can be
[0011]
The vinyl monomer used in the present invention is not particularly limited, and various types can be used. For example, methyl (meth) acrylate, ethyl (meth) acrylate, -n- (meth) acrylate Propyl, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, (meth) acryl Acid-n-hexyl, cyclohexyl (meth) acrylate, n-heptyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, (Meth) acrylates such as decyl (meth) acrylate, dodecyl (meth) acrylate, and phenyl (meth) acrylate; styrene 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2-chlorostyrene, 3-chlorostyrene, 4-chlorostyrene, 2- (chloromethyl) styrene, 3- (chloromethyl) styrene, 4- (Chloromethyl) styrene, 2-methoxystyrene, 3-methoxystyrene, 4-methoxystyrene, 2- (methoxycarbonyl) styrene, 3- (methoxycarbonyl) styrene, 4- (methoxycarbonyl) styrene, α-methylstyrene, etc. Styrene derivatives; maleic anhydride and the like. These may be used alone or in combination of two or more.
[0012]
In the present invention, when polymerizing the vinyl-based monomer, an organic compound having a relative dielectric constant of 10 or more measured at 25 ° C. is used as a solvent.
The organic compound having a relative dielectric constant of 10 or more measured at 25 ° C. is not particularly limited, but in the present invention, a carbonyl compound represented by the following general formula (1) can be suitably used.
[0013]
Embedded image
In the formula, R 1 and R 2 are the same or different and are hydrogen, an alkyl group having 1 to 10 carbon atoms, an aryl group having 1 to 10 carbon atoms, or an aralkyl group having 1 to 10 carbon atoms.
Specific examples of such a carbonyl compound are not particularly limited, and examples thereof include non-cyclic compounds such as acetone, 2-butanone, 2-pentanone, 3-pentanone, 2-hexanone, 2-heptanone, and 4-methyl-2-pentanone. Aliphatic ketones; cycloaliphatic ketones such as cyclohexanone, 2-methylcyclohexanone, 3-methylcyclohexanone, and 4-methylcyclohexanone; aromatic ketones such as acetophenone, 2-methylacetophenone, 3-methylacetophenone, and 4-methylacetophenone And the like.
[0015]
As the organic compound having a relative dielectric constant of 10 or more measured at 25 ° C., a nitro compound represented by the following general formula (2) can be suitably used.
R 3 -NO 2 (2)
In the formula, R 3 is an alkyl group having 1 to 10 carbon atoms, an aryl group having 1 to 10 carbon atoms, or an aralkyl group having 1 to 10 carbon atoms.
[0016]
Specific examples of such a nitro compound are not particularly limited, and include, for example, nitromethane, nitroethane, nitropropane, nitrobenzene and the like.
[0017]
Further, as the organic compound having a relative dielectric constant of 10 or more measured at 25 ° C., a nitrile compound represented by the following general formula (3) can be suitably used.
R 3 -CN (3)
In the formula, R 3 is the same as in the general formula (2).
Specific examples of such a nitrile compound are not particularly limited, and include, for example, acetonitrile, propionitrile, benzonitrile and the like.
[0018]
Further, as the organic compound having a relative dielectric constant of 10 or more measured at 25 ° C., an alcohol compound represented by the following general formula (4) can be suitably used.
R 3 -OH (4)
In the formula, R 3 is the same as in the general formula (2).
Specific examples of such alcohol compounds are not particularly limited, and include, for example, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, cyclohexyl alcohol, benzyl alcohol and the like.
[0019]
In the present invention, the carbonyl compound represented by the general formula (1), the nitro compound represented by the general formula (2), the nitrile compound represented by the general formula (3), The alcohol compound represented by 4) may be used alone or in combination of two or more.
[0020]
Further, a solvent other than the organic compound having a relative dielectric constant of 10 or more measured at 25 ° C. may be used in combination. The other solvent is not particularly limited, and examples thereof include organic compounds such as hexane, toluene, ethyl acetate, and tetrahydrofuran.
When the other solvent is used, the organic compound having a relative dielectric constant of 10 or more measured at 25 ° C. is preferably contained in an amount of 10 to 100% by volume based on the total amount of the solvent. When the content is less than 10% by volume, the molecular weight distribution of the obtained vinyl polymer becomes wide.
[0021]
In the present invention, the total amount of the solvent used when polymerizing the vinyl monomer is not particularly limited, but in order to achieve an appropriate reaction rate, the volume of the vinyl monomer is 0.5 to A 10-fold amount is preferred.
[0022]
When polymerizing the vinyl-based monomer, the polymerization temperature can be appropriately set according to the type of the vinyl-based monomer and the like. In general, the temperature is preferably from 60 to 150 ° C.
[0023]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
[0024]
Example 1
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (10 mL, 9.94 g, 69.8 mmol), α, α′-dibromo-p-xylene (370 mg, 1.4 mmol), cuprous bromide (200 mg, .4 mmol), 2,2'-bipyridyl (652 mg, 4.2 mmol), and acetone (dielectric constant: 20.70, 10 mL), vacuum degassing was performed three times to remove dissolved oxygen, and then sealed. Piped. The mixture was heated to 130 ° C. and reacted for 3 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 4.26 g of poly (butyl acrylate) (polymerization yield: 47.6%).
[0025]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 3,900, and the degree of dispersion (Mw / Mn) was 1.17.
[0026]
Example 2
In a 30 mL pressure-resistant glass reaction vessel, methyl acrylate (3.1 mL, 3.0 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg) , 0.70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), and 4-methyl-2-pentanone (relative dielectric constant at 20 ° C. 13.11, 3.14 mL), and nitrogen gas was supplied for 10 minutes. After removing dissolved oxygen by blowing, the tube was sealed. The mixture was heated to 130 ° C. and reacted for 0.5 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 2.07 g of poly (methyl acrylate) (polymerization yield: 68.8%).
[0027]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 3,900, and the degree of dispersion was 1.31.
Example 3
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg, 0 .70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), and acetonitrile (dielectric constant: 36.0, 5 mL), and vacuum degassing was performed three times to remove dissolved oxygen. Piped. The mixture was heated to 150 ° C. and reacted for 9 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 1.41 g of poly (butyl acrylate) (polymerization yield: 31.5%).
[0028]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 2,800, and the degree of dispersion was 1.21.
[0029]
Example 4
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), ethyl α-bromopropionate (0.090 mL, 0.70 mmol), cuprous bromide (100 mg, 0.70 mmol) ), 2,2'-bipyridyl (326 mg, 2.1 mmol) and acetonitrile (5 mL) were charged, and the mixture was subjected to vacuum degassing three times to remove dissolved oxygen and then sealed. The mixture was heated to 130 ° C. and reacted for 5 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 2.95 g of poly (butyl acrylate) (polymerization yield: 66.0%).
[0030]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 3,600, and the degree of dispersion was 1.13.
[0031]
Example 5
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg, 0 .70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), acetonitrile (2.5 mL), and ethyl acetate (relative permittivity 6.02, 2.5 mL), and vacuum degassing was performed three times. After removing dissolved oxygen, the tube was sealed. The mixture was heated to 130 ° C. and reacted for 6 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 1.41 g of poly (butyl acrylate) (polymerization yield: 31.5%).
[0032]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 5,100, and the degree of dispersion was 1.15.
[0033]
Example 6
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg, 0 .70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), acetonitrile (1 mL), and ethyl acetate (4 mL), and vacuum degassing was performed three times to remove dissolved oxygen. did. The mixture was heated to 130 ° C. and reacted for 2 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 3.79 g of poly (butyl acrylate) (polymerization yield: 84.8%).
[0034]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 5,700, and the degree of dispersion was 1.26.
[0035]
Example 7
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), ethyl α-bromopropionate (0.090 mL, 0.70 mmol), cuprous bromide (100 mg, 0.70 mmol) ), 2,2'-bipyridyl (326 mg, 2.1 mmol) and benzonitrile (relative permittivity 25.20, 5 mL) were charged, vacuum degassing was performed three times to remove dissolved oxygen, and then sealed. did. The mixture was heated to 130 ° C. and reacted for 2 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 2.48 g of poly (butyl acrylate) (polymerization yield: 55.5%).
[0036]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 3,600, and the degree of dispersion was 1.16.
[0037]
Example 8
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), ethyl α-bromopropionate (0.090 mL, 0.70 mmol), cuprous bromide (100 mg, 0.70 mmol) ), 2,2'-bipyridyl (326 mg, 2.1 mmol), and nitroethane (dielectric constant of 28.06 at 30 ° C., 5 mL), and vacuum degassing was performed three times to remove dissolved oxygen. It was sealed. The mixture was heated to 130 ° C. and reacted for 6 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 1.97 g of poly (butyl acrylate) (polymerization yield: 44.1%).
[0038]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 2,000, and the degree of dispersion was 1.23.
[0039]
Example 9
In a 30 mL pressure-resistant glass reaction vessel, methyl acrylate (3.1 mL, 3.0 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg) , 0.70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), acetonitrile (0.63 mL), and ethyl acetate (2.51 mL), and vacuum degassing was performed three times to remove dissolved oxygen. After removal, the tube was sealed. The mixture was heated to 130 ° C. and reacted for 2 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 2.09 g of poly (methyl acrylate) (polymerization yield: 70.0%).
[0040]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 4,300, and the degree of dispersion was 1.18.
[0041]
Example 10
In a 30 mL pressure-resistant glass reaction vessel, methyl acrylate (3.1 mL, 3.0 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg) , 0.70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), ethanol (dielectric constant 24.55, 0.63 mL), and ethyl acetate (2.51 mL). After removing the dissolved oxygen by performing the reaction three times, the tube was sealed. The mixture was heated to 130 ° C. and reacted for 2 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 2.01 g of poly (methyl acrylate) (polymerization yield: 67.0%).
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 3,600, and the degree of dispersion was 1.37.
[0042]
Comparative Example 1
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg, 0 .70 mmol) and 2,2'-bipyridyl (326 mg, 2.1 mmol), vacuum degassing was performed three times to remove dissolved oxygen, and the tube was sealed. The mixture was heated to 130 ° C. and reacted for 1 hour. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 4.45 g of poly (butyl acrylate) (polymerization yield: 99.6%).
[0043]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 6,300, and the degree of dispersion was 1.75.
[0044]
Comparative Example 2
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg, 0 .70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), and ethyl acetate (relative permittivity 6.02, 5 mL), and vacuum degassing was performed three times to remove dissolved oxygen. It was sealed. The mixture was heated to 130 ° C. and reacted for 6 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 4.31 g of poly (butyl acrylate) (polymerization yield: 96.4%).
[0045]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 6,300, and the degree of dispersion was 1.77.
[0046]
Comparative Example 3
In a 30 mL pressure-resistant glass reaction vessel, butyl acrylate (5 mL, 4.47 g, 34.9 mmol), α, α′-dibromo-p-xylene (185 mg, 0.70 mmol), cuprous bromide (100 mg, 0 .70 mmol), 2,2'-bipyridyl (326 mg, 2.1 mmol), and toluene (relative dielectric constant 2.38, 5 mL), and vacuum degassing was performed three times to remove dissolved oxygen. Piped. The mixture was heated to 130 ° C. and reacted for 4 hours. The mixture was diluted with ethyl acetate and washed three times with 10% hydrochloric acid and once with brine. After the organic layer was dried over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure to obtain 4.41 g of poly (butyl acrylate) (polymerization yield: 98.7%).
[0047]
The number average molecular weight of the polymer determined by GPC measurement (in terms of polystyrene) was 5,800, and the degree of dispersion was 1.92.
[0048]
Table 1 summarizes the results. In Table 1, BA is butyl acrylate, MA is methyl acrylate, bromoxylene is α, α′-dibromo-p-xylene, bromoic acid is ethyl α-bromopropionate, and bipyridyl is 2,2′-bipyridyl. Is shown.
[0049]
[Table 1]
【The invention's effect】
Since the method for producing a vinyl polymer of the present invention is as described above, a polymer having a controlled molecular weight and a narrow molecular weight distribution from vinyl monomers such as styrene and (meth) acrylate can be easily prepared. Can be obtained. Further, since the vinyl polymer obtained by the present invention has a narrow molecular weight distribution, the viscosity is smaller than that of a vinyl polymer having the same skeleton and the same molecular weight, which is obtained by a conventional method and has a high degree of dispersion. Therefore, the vinyl polymer obtained by the present invention can be a raw material for a resin composition having excellent workability.
Claims (4)
前記重合の際に、２５℃における比誘電率が１０以上の有機化合物を溶媒として用いることを特徴とするビニル系重合体の製造方法。A method for producing a vinyl polymer in which an organic halide is used as a polymerization initiator and an acrylic acid ester or a methacrylic acid ester is polymerized using a monovalent copper compound as a catalyst,
A method for producing a vinyl polymer, wherein an organic compound having a relative dielectric constant at 25 ° C. of 10 or more is used as a solvent during the polymerization.
下記一般式（１）；
下記一般式（２）；
Ｒ3 −ＮＯ2 （２）
（式中、Ｒ3 は、炭素数１〜１０のアルキル基、炭素数１〜１０のアリール基又は炭素数１〜１０のアラルキル基を表す。）で表されるニトロ化合物、
下記一般式（３）；
Ｒ3 −ＣＮ （３）
（式中、Ｒ3 は、前記と同じ。）で表されるニトリル化合物、及び、
下記一般式（４）；
Ｒ3 −ＯＨ （４）
（式中、Ｒ3 は、前記と同じ。）で表されるアルコール化合物からなる群より選択される少なくとも１種である請求項１記載のビニル系重合体の製造方法。An organic compound having a relative dielectric constant of 10 or more at 25 ° C.
The following general formula (1);
The following general formula (2):
R 3 -NO 2 (2)
(Wherein, R 3 represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 1 to 10 carbon atoms or an aralkyl group having 1 to 10 carbon atoms),
The following general formula (3):
R 3 -CN (3)
(Wherein, R 3 is the same as described above); and
The following general formula (4);
R 3 -OH (4)
(Wherein, R 3 is the same.) At least one method for producing a vinyl polymer according to claim 1, wherein that is selected from the group consisting of alcohol compounds represented by.
前記重合の際に、アセトニトリルを溶媒として用いることを特徴とするビニル系重合体の製造方法。A method for producing a vinyl polymer, wherein acetonitrile is used as a solvent during the polymerization.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00390097A JP3587418B2 (en) | 1996-06-26 | 1997-01-13 | Method for producing vinyl polymer |
| DE69710130T DE69710130T2 (en) | 1996-06-26 | 1997-06-18 | Process for the production of vinyl polymers |
| EP97109952A EP0816385B1 (en) | 1996-06-26 | 1997-06-18 | Process for preparing vinyl polymer |
| CN97117110.6A CN1171405A (en) | 1996-06-26 | 1997-06-26 | Process for preparing vinyl polymer |
| US09/116,541 US6291612B1 (en) | 1996-06-26 | 1998-07-16 | Process for preparing vinyl polymer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18656796 | 1996-06-26 | ||
| JP8-186567 | 1996-06-26 | ||
| JP00390097A JP3587418B2 (en) | 1996-06-26 | 1997-01-13 | Method for producing vinyl polymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1072503A JPH1072503A (en) | 1998-03-17 |
| JP3587418B2 true JP3587418B2 (en) | 2004-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00390097A Expired - Lifetime JP3587418B2 (en) | 1996-06-26 | 1997-01-13 | Method for producing vinyl polymer |
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| JP (1) | JP3587418B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE69925121T2 (en) * | 1998-06-01 | 2006-01-19 | Kaneka Corp. | Polymerization |
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