JP2004107606A - Method for producing high molecular weight aromatic polyether - Google Patents

Method for producing high molecular weight aromatic polyether Download PDF

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JP2004107606A
JP2004107606A JP2002280678A JP2002280678A JP2004107606A JP 2004107606 A JP2004107606 A JP 2004107606A JP 2002280678 A JP2002280678 A JP 2002280678A JP 2002280678 A JP2002280678 A JP 2002280678A JP 2004107606 A JP2004107606 A JP 2004107606A
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Prior art keywords
alkali metal
aromatic polyether
biphenol
molecular weight
mol
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Japanese (ja)
Inventor
Kazunari Okamoto
岡本 一成
Kunihisa Sato
佐藤 邦久
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an aromatic polyether by polymerizing biphenol and a dihalogenodiphenylsulfone in the presence of an alkali metal carbonate salt and/or alkali metal bicarbonate to produce the aromatic polyether having a high molecular weight and also a small molecular weight dispersion. <P>SOLUTION: This method for producing the aromatic polyether expressed by formula (1) [wherein, X<SP>1</SP>, X<SP>2</SP>are each independently a halogen atom; and (n) is ≥1 integer] is provided by polymerizing 4, 4'-biphenol and >1 mol and ≤1.05 mol folds 4, 4'-dihalogenodiphenylsulfone expressed by formula (2) [wherein, X<SP>1</SP>, X<SP>2</SP>are the same as above] in the presence of the alkali metal carbonate and/or alkali metal bicarbonate in diphenylsulfone at 240-270°C. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、ビフェノールとジハロゲノジフェニルスルホンとをアルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩存在下、ジフェニルスルホン中にて重合させて得られる芳香族ポリエーテルの製造方法に関する。
【0002】
【従来の技術】
式(1−1)

Figure 2004107606
で示される繰返し単位を有する芳香族ポリエーテルは、耐熱性、耐衝撃性などに優れた高分子化合物として有用であり、その製造方法としては、例えば、ジフェニルスルホン中にて、4,4’−ビフェノールと式(2)
Figure 2004107606
〔式中、XおよびXはそれぞれ独立にハロゲン原子を示す。〕
で示される4,4’−ジハロゲノジフェニルスルホン類とを、炭酸カリウムの存在下、ジフェニルスルホン中にて重合させて、下記式(1)
Figure 2004107606
〔式中、XおよびXは前記と同じ意味を示し、nは1以上の整数を示す。〕で示される芳香族ポリエーテルを製造する方法が特許文献1に報告されている。
【0003】
【特許文献1】特開平3−84032号公報(第11頁右下欄下から1行目〜第12頁左上欄8行目、実施例G)。
【0004】
【発明が解決しようとする課題】
本発明者らは、4,4’−ビフェノール 1モルに対して1〜1.05モル倍の4,4’−ジハロゲノジフェニルスルホンを用い、炭酸カリウムの存在下、ジフェニルスルホン中にて重合させて、式(1)で示された芳香族ポリエーテルを製造する方法について検討したところ、重量平均分子量35000以上の高分子量の芳香族ポリエーテルは得られるものの、該芳香族ポリエーテルの分子量分散が大きくなり、結果として、該芳香族ポリエーテルを射出成形物の耐衝撃性が低下することが明らかになった。
【0005】
本発明の目的は、ビフェノールとジハロゲノジフェニルスルホン類とをアルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩存在下、ジフェニルスルホン中にて重合させて得られる芳香族ポリエーテルの製造方法において、高分子量で、かつ、分子量分散の小さい芳香族ポリエーテルを製造する方法を提供することである。
【0006】
【課題を解決するための手段】
このような状況下、本発明者らは、鋭意検討した結果、特定の温度で重合することにより、かかる課題を解決し得ることを見出すとともに、該製造方法において、次亜リン酸及び/又は次亜リン酸塩を用いることによって、透明性が一層、向上した芳香族ポリエーテルを与えることも見出し、本発明を完成した。
【0007】
すなわち、本発明は、4,4’−ビフェノールと、該4,4’−ビフェノールに対して1モル倍を超え1.05モル倍以下の式(2)
Figure 2004107606
〔式中、XおよびXはそれぞれ独立にハロゲン原子を示す。〕
で示される4,4’−ジハロゲノジフェニルスルホン類とをアルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩の存在下、ジフェニルスルホン中にて、240℃〜270℃にて重合させることを特徴とする式(1)
Figure 2004107606
〔式中、XおよびXは前記と同じ意味を示し、nは1以上の整数を示す。〕で示される芳香族ポリエーテルの製造方法;
および、該製造方法において、4,4’−ビフェノール1モルに対して、さらに、次亜リン酸及び/又は次亜リン酸塩0.001〜0.006モル倍の存在下に重合させることを特徴とする製造方法である。
【0008】
【発明の実施の形態】
以下、本発明について詳細に説明する。
本発明に用いられる4,4’−ビフェノールは、式(3)
Figure 2004107606
で示される化合物である。
【0009】
次に、式(2)で示される4,4’−ジハロゲノジフェニルスルホン類について説明する。式(2)中、XおよびXで示されるハロゲン原子としては、例えば、フッ素原子、塩素原子、臭素原子が挙げられ、かかる4,4’−ジハロゲノジフェニルスルホン類としては、例えば4,4’−ジフルオロジフェニルスルホン、4,4’−ジクロロジフェニルスルホン、4,4’−ジブロモジフェニルスルホンなどが挙げられる。
4,4’−ジハロゲノジフェニルスルホン類の使用量としては、4,4’−ビフェノール1モルに対して、通常、1.01〜1.05モル倍、好ましくは1.02〜1.04モル倍程度である。1.05モル倍以下であると、得られる芳香族ポリエーテルの分子量が高くなる傾向にあることから好ましい。
【0010】
本発明で用いられるジフェニルスルホンの使用量としては、4,4’−ビフェノールおよび4,4’−ジハロゲノジフェニルスルホン類の合計量に対し、通常、0.1〜10質量倍程度、好ましくは0.5〜3質量倍程度である。
【0011】
本発明で用いられるアルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩としては、例えば、炭酸カリウム、炭酸ナトリウムなどが挙げられ、通常は炭酸カリウムが用いられる。アルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩の使用量は、4,4’−ビフェノール1モルに対し、通常、1モル倍以上1.2モル倍以下であるが、得られる芳香族ポリエーテルの透明性の点で、1.05モル倍以上、とりわけ好ましくは、1.08モル倍以上が好ましい。
アルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩としては、通常、粉末が使用され、粉末のものを用いると、透明性に優れることから好ましい。具体的には、FG−10、FG−20などの旭硝子製の粉末炭酸カリウムや、日本曹達製の粉末炭酸カリウムなどが例示される。
【0012】
本発明は、4,4’−ビフェノール(3)と、ジハロゲノジフェニルスルホン類(2)とをアルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩の存在下、ジフェニルスルホン中にて、240℃〜270℃にて重合させることを特徴とする芳香族ポリエーテルの製造方法である。該重合温度は、得られる芳香族ポリエーテルの透明性の点では、255℃以下で重合させることが好ましい。240℃以上では、重合の反応速度が向上する傾向にあることから好ましく、また、270℃以下であると得られる芳香族ポリエーテルの分子量分散が低下する傾向にあることから好ましい。
【0013】
該重合温度が255℃以下である場合には、アルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩の使用量が4,4’−ビフェノール1モルに対し、1.06モル倍以上であると、得られる芳香族ポリエーテルの透明性の点で、好ましい。
重合の所要時間としては、通常、3〜20時間程度である。
【0014】
本発明で得られる芳香族ポリエーテルの透明性を一層、向上させるために、本発明の製造方法において、例えば、次亜リン酸、次亜リン酸ナトリウム、次亜リン酸カリウムなどの次亜リン酸及び/又は次亜リン酸塩存在下に重合することが好ましく、中でも、次亜リン酸存在下に重合することが好適である。
次亜リン酸及び/又は次亜リン酸塩の使用量としては、4,4’−ビフェノール1モルに対して、通常、0.001〜0.006モル倍程度、好ましくは0.0015〜0.004モル倍程度である。次亜リン酸及び/又は次亜リン酸塩が上記範囲で存在すると、得られる芳香族ポリエーテルの透明性が向上する傾向にあることから好ましい。
【0015】
次亜リン酸及び/又は次亜リン酸塩は、重合の際に存在していればよく、その添加方法としては、例えば、4,4’−ビフェノールと混合する方法;ジハロゲノジフェニルスルホンと混合する方法;ジフェニルスルホンと混合する方法;重合反応中に混合する方法などが挙げられる。
【0016】
かくして芳香族ポリエーテルが生成するが、反応後の反応混合物から芳香族ポリエーテルを得るには、例えば反応後の反応混合物を固化し、粉末としたのち、溶媒で洗浄すればよい。反応後の反応混合物を固化するには、冷却すればよく、室温程度まで冷却することで固化することができる。固化した反応混合物を粉末とするには、反応混合物を粉砕すればよい。溶媒としては、芳香族ポリエーテルを溶解することなく、重合にて生成するアルカリ金属ハロゲン物などのアルカリ金属塩、及びジフェニルスルホンを溶解し得る溶媒が用いられ、例えば水や、アセトン、メチルエチルケトンなどの脂肪族ケトン、メタノール、エタノール、イソプロパノールなどの脂肪族アルコールおよびこれらの混合溶媒などを用いることができる。
【0017】
【実施例】
以下、実施例によって本発明をより詳細に説明するが、本発明はかかる実施例によって限定されるものではない。
特に断りがない限り、部は質量部を表す。
【0018】
(実施例1)
攪拌機、窒素ガス導入管、温度計、コンデンサーを備えた反応容器に、4,4’−ビフェノール(粉末状)81.93部(1モル比)、4,4’−ジクロロジフェニルスルホン(粉末状)130.65部(1.034モル比)およびジフェニルスルホン(粉末状)193.12部を投入し、窒素ガスを流通させながら170℃に昇温した。同温度で内容物はスラリー状態となっていた。次いで同温度で窒素ガスを流通させると共にスラリーを攪拌しながら、炭酸カリウム67.5部(1.11モル比、粒度≦150μmの割合が97.3〜99.6%、粒度150〜75μmの割合が1.2〜8.4%、粒度75〜45μmの割合が3.9〜55.7%、粒度≦45μmの割合が38.0〜92.9%、日本曹達社製)を投入し、2.5時間をかけて248℃まで昇温したのち、窒素ガスを流通させながら同温度で攪拌を10時間続けた。その後、室温まで冷却し、固化した反応混合物を粉砕し、水、アセトンおよびメタノールの混合溶媒で繰返し洗浄したのち、150℃で乾燥して、芳香族ポリエーテルを得た。
【0019】
〔評価〕
得られた芳香族ポリエーテルを以下の方法で評価した。結果を表1にまとめた。
(1)分子量
ゲルパーミエーションクロマトグラフィーによって重量平均分子量(Mw)を求めた。
ゲルパーミエーションクロマトグラフィーの装置は、「150_C plus」(Waters社製)を用いた。
分離カラムは、「TSKgel GMHHR−Hカラム」(東ソー社製)を2本直列に接続して使用した。
溶離液は、ジメチルホルムアミドを流量1cm/分で用いた。
検出器は、RI検出器(屈折率計)を用いた。
標準物質は、単分散標準ポリスチレンを用いた。
【0020】
(2)分子量分散
上記と同様にしてゲルパーミエーションクロマトグラフィーによって数平均分子量(Mn)を求め、重量平均分子量(Mw)との比(Mw/Mn)として分子量分散を求めた。この比(Mw/Mn)が小さいほど、分子量の分布が狭いことを示す。
【0021】
(3)溶液カラーファクター(S.C.F.)
得られた芳香族ポリエーテル 5.56gをN−メチルピロリジノン 100cmに溶解し(0.0556 g/ml)、懸濁物を孔径0.45μmフィルターで濾過した濾液を、分光光度計 UV−2400PC(島津製作所製、セル長100mm、3.937 inch)を用いて、xとyの色度座標、並びに400nmにおける透過率(T400)を求めた。溶液色調は黄色味を下記式で表される溶液カラーファクター(S.C.F.)で表現した。
(S.C.F.)=[{(x+y)−0.6275}×270]/(3.937×0.0556)
【0022】
(4)耐衝撃性試験
射出成形機を用いて、得られた芳香族ポリエーテルを長さ64mm、幅12.7mm、厚み3.2mm、中央部に先端半径0.25mm、深さ1.3mmのノッチを有する試験片に成形し、ASTM  D256に準拠して測定した。
【0023】
(実施例2〜12および比較例1)
4,4’−ジクロロジフェニルスルホン、炭酸カリウムを表1に記載の質量比率で用い、内容物の温度が表1に記載の重合温度に達するまで昇温する以外は実施例1と同様にして芳香族ポリエーテルを得、評価も実施例1と同様に実施した。結果を表1にまとめた。
【0024】
(実施例13)
反応容器に、4,4’−ビフェノール(粉末状)81.93部(1モル比)に対し、次亜リン酸(30重量%水溶液)を0.002モル比投入し、表1に記載の条件で、実施する以外は、実施例1と同様にして芳香族ポリエーテルを得、評価も実施例1と同様に実施した。結果を表1にまとめた。
【0025】
【表1】
Figure 2004107606
【0026】
【発明の効果】
本発明の製造方法によって得られる芳香族ポリエーテルは、式(1)で示されるものであるが、その分子量は、例えば重量平均分子量(Mw)で35000以上と高く、かつ、分子量分散が小さい。
芳香族ポリエーテルは透明性に優れ、また、その射出成形物は、透明性、耐熱性および耐衝撃性に優れる。
さらに、本発明の製造方法を次亜リン酸及び/又は次亜リン酸塩の存在下に重合せしめることにより、一層、透明性に優れた芳香族ポリエーテルを得ることができる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing an aromatic polyether obtained by polymerizing biphenol and dihalogenodiphenyl sulfone in diphenyl sulfone in the presence of an alkali metal carbonate and / or an alkali metal bicarbonate.
[0002]
[Prior art]
Formula (1-1)
Figure 2004107606
The aromatic polyether having a repeating unit represented by is useful as a polymer compound having excellent heat resistance, impact resistance, and the like. Biphenol and formula (2)
Figure 2004107606
[Wherein X 1 and X 2 each independently represent a halogen atom. ]
Is polymerized in diphenyl sulfone in the presence of potassium carbonate to give a compound represented by the following formula (1):
Figure 2004107606
[Wherein, X 1 and X 2 have the same meaning as described above, and n represents an integer of 1 or more. Patent Document 1 discloses a method for producing an aromatic polyether represented by the following formula:
[0003]
[Patent Document 1] JP-A-3-84032 (first line from the lower right column on page 11 to line 8 on the upper left column on page 12; Example G).
[0004]
[Problems to be solved by the invention]
The present inventors used 1,4 to 1.05 mole times 4,4'-dihalogenodiphenylsulfone with respect to 1 mole of 4,4'-biphenol, and polymerized in diphenylsulfone in the presence of potassium carbonate. Then, when a method for producing the aromatic polyether represented by the formula (1) was examined, a high-molecular weight aromatic polyether having a weight average molecular weight of 35,000 or more was obtained, but the molecular weight dispersion of the aromatic polyether was low. It became clear that the impact resistance of the injection molded article of the aromatic polyether was reduced as a result.
[0005]
An object of the present invention is to provide a method for producing an aromatic polyether obtained by polymerizing biphenol and dihalogenodiphenyl sulfones in diphenyl sulfone in the presence of an alkali metal carbonate and / or an alkali metal bicarbonate. An object of the present invention is to provide a method for producing an aromatic polyether having a low molecular weight and a low molecular weight dispersion.
[0006]
[Means for Solving the Problems]
Under such circumstances, the present inventors have conducted intensive studies and found that such a problem can be solved by polymerizing at a specific temperature, and in the production method, hypophosphorous acid and / or It has also been found that the use of a phosphite gives an aromatic polyether with further improved transparency, and the present invention has been completed.
[0007]
That is, the present invention relates to 4,4′-biphenol and a compound represented by the formula (2) having a molar ratio of more than 1 mole to 1.05 mole of the 4,4′-biphenol.
Figure 2004107606
[Wherein X 1 and X 2 each independently represent a halogen atom. ]
And 4,4′-dihalogenodiphenylsulfone represented by the formula (I) is polymerized at 240 ° C. to 270 ° C. in diphenyl sulfone in the presence of an alkali metal carbonate and / or an alkali metal bicarbonate. Equation (1)
Figure 2004107606
[Wherein, X 1 and X 2 have the same meaning as described above, and n represents an integer of 1 or more. A method for producing an aromatic polyether represented by the formula:
And, in the production method, polymerizing in the presence of 0.001 to 0.006 mole times of hypophosphorous acid and / or hypophosphite with respect to 1 mole of 4,4′-biphenol. This is a characteristic manufacturing method.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
The 4,4′-biphenol used in the present invention has the formula (3)
Figure 2004107606
It is a compound shown by these.
[0009]
Next, the 4,4′-dihalogenodiphenyl sulfones represented by the formula (2) will be described. In the formula (2), examples of the halogen atom represented by X 1 and X 2 include a fluorine atom, a chlorine atom, and a bromine atom. Examples of the 4,4′-dihalogenodiphenyl sulfones include, for example, 4, 4'-difluorodiphenylsulfone, 4,4'-dichlorodiphenylsulfone, 4,4'-dibromodiphenylsulfone and the like.
The amount of the 4,4′-dihalogenodiphenylsulfone to be used is generally 1.01 to 1.05 mol, preferably 1.02 to 1.04 mol, per 1 mol of 4,4′-biphenol. It is about twice. When the molar ratio is 1.05 mol or less, the molecular weight of the obtained aromatic polyether tends to be high, which is preferable.
[0010]
The amount of diphenylsulfone used in the present invention is usually about 0.1 to 10 times by mass, preferably 0 to 10 times by mass relative to the total amount of 4,4′-biphenol and 4,4′-dihalogenodiphenylsulfones. It is about 0.5 to 3 times by mass.
[0011]
Examples of the alkali metal carbonate and / or alkali metal bicarbonate used in the present invention include potassium carbonate and sodium carbonate, and usually potassium carbonate is used. The amount of the alkali metal carbonate and / or the alkali metal bicarbonate to be used is usually 1 mol times or more and 1.2 mol times or less relative to 1 mol of 4,4′-biphenol, but the obtained aromatic polyether is used. In terms of transparency, the molar ratio is preferably 1.05 mol times or more, particularly preferably 1.08 mol times or more.
As the alkali metal carbonate and / or the alkali metal bicarbonate, a powder is usually used, and the use of a powder is preferred because of excellent transparency. Specifically, powdered potassium carbonate manufactured by Asahi Glass, such as FG-10 and FG-20, and powdered potassium carbonate manufactured by Nippon Soda are exemplified.
[0012]
The present invention relates to a method for preparing 4,4′-biphenol (3) and dihalogenodiphenylsulfones (2) in diphenylsulfone in the presence of an alkali metal carbonate and / or an alkali metal bicarbonate at a temperature of 240 ° C. A method for producing an aromatic polyether, which comprises polymerizing at 270 ° C. The polymerization temperature is preferably 255 ° C. or lower in terms of transparency of the obtained aromatic polyether. When the temperature is 240 ° C. or higher, the polymerization reaction rate tends to increase, and when it is 270 ° C. or lower, the molecular weight dispersion of the aromatic polyether obtained tends to decrease.
[0013]
When the polymerization temperature is 255 ° C. or less, when the amount of the alkali metal carbonate and / or the alkali metal bicarbonate is 1.06 mol times or more with respect to 1 mol of 4,4′-biphenol, It is preferable in terms of transparency of the obtained aromatic polyether.
The time required for the polymerization is usually about 3 to 20 hours.
[0014]
In order to further improve the transparency of the aromatic polyether obtained in the present invention, in the production method of the present invention, for example, hypophosphorous acid, sodium hypophosphite, hypophosphorous acid such as potassium hypophosphite It is preferable to polymerize in the presence of an acid and / or hypophosphite, and particularly preferable to polymerize in the presence of hypophosphorous acid.
The amount of hypophosphorous acid and / or hypophosphite used is usually about 0.001 to 0.006 mol times, preferably 0.0015 to 0 times mol per mol of 4,4'-biphenol. It is about 0.004 mole times. The presence of hypophosphorous acid and / or hypophosphite in the above range is preferable because the transparency of the obtained aromatic polyether tends to be improved.
[0015]
Hypophosphorous acid and / or hypophosphite may be present at the time of polymerization, and may be added, for example, by mixing with 4,4′-biphenol; by mixing with dihalogenodiphenylsulfone. A method of mixing with diphenylsulfone; a method of mixing during the polymerization reaction.
[0016]
Thus, an aromatic polyether is generated. To obtain an aromatic polyether from the reaction mixture after the reaction, for example, the reaction mixture after the reaction is solidified, powdered, and then washed with a solvent. The reaction mixture after the reaction may be solidified by cooling, and may be solidified by cooling to about room temperature. In order to make the solidified reaction mixture a powder, the reaction mixture may be ground. As the solvent, without dissolving the aromatic polyether, a solvent capable of dissolving an alkali metal salt such as an alkali metal halide generated by polymerization, and a solvent capable of dissolving diphenyl sulfone, for example, water, acetone, methyl ethyl ketone and the like Aliphatic ketones, aliphatic alcohols such as methanol, ethanol and isopropanol, and mixed solvents thereof can be used.
[0017]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the examples.
Parts represent parts by weight unless otherwise specified.
[0018]
(Example 1)
In a reaction vessel equipped with a stirrer, nitrogen gas inlet tube, thermometer, and condenser, 81.93 parts (1 mole ratio) of 4,4'-biphenol (powder) and 4,4'-dichlorodiphenyl sulfone (powder) 130.65 parts (1.034 mole ratio) and 193.12 parts of diphenylsulfone (powder) were added, and the temperature was raised to 170 ° C. while flowing nitrogen gas. At the same temperature, the contents were in a slurry state. Then, while flowing nitrogen gas at the same temperature and stirring the slurry, 67.5 parts of potassium carbonate (1.11 mol ratio, the ratio of particle size ≦ 150 μm is 97.3 to 99.6%, and the ratio of particle size is 150 to 75 μm) 1.2 to 8.4%, a ratio of particle size of 75 to 45 μm is 3.9 to 55.7%, and a particle size of ≦ 45 μm is 38.0 to 92.9%, manufactured by Nippon Soda Co., Ltd.) After the temperature was raised to 248 ° C. over 2.5 hours, stirring was continued for 10 hours at the same temperature while flowing nitrogen gas. Thereafter, the reaction mixture was cooled to room temperature, and the solidified reaction mixture was pulverized, washed repeatedly with a mixed solvent of water, acetone and methanol, and dried at 150 ° C. to obtain an aromatic polyether.
[0019]
[Evaluation]
The obtained aromatic polyether was evaluated by the following method. The results are summarized in Table 1.
(1) Molecular weight The weight average molecular weight (Mw) was determined by gel permeation chromatography.
As a device for gel permeation chromatography, "150_C plus" (manufactured by Waters) was used.
As the separation column, two “TSKgel GMHHR-H columns” (manufactured by Tosoh Corporation) were connected in series and used.
As an eluent, dimethylformamide was used at a flow rate of 1 cm 3 / min.
As the detector, an RI detector (refractometer) was used.
As the standard substance, monodispersed standard polystyrene was used.
[0020]
(2) Molecular weight dispersion The number average molecular weight (Mn) was determined by gel permeation chromatography in the same manner as described above, and the molecular weight dispersion was determined as a ratio (Mw / Mn) to the weight average molecular weight (Mw). The smaller the ratio (Mw / Mn), the narrower the molecular weight distribution.
[0021]
(3) Solution color factor (SCF)
5.56 g of the obtained aromatic polyether was dissolved in 100 cm 3 of N-methylpyrrolidinone (0.0556 g / ml), and the filtrate obtained by filtering the suspension with a 0.45 μm filter was used as a spectrophotometer UV-2400PC. Using (Shimadzu Corporation, cell length 100 mm, 3.937 inch), chromaticity coordinates of x and y and transmittance (T400) at 400 nm were obtained. In the solution color tone, the yellow color was represented by a solution color factor (SCF) represented by the following formula.
(SCF) = [{(x + y) −0.6275} × 270] / (3.937 × 0.0556)
[0022]
(4) Impact resistance test Using an injection molding machine, the obtained aromatic polyether was 64 mm in length, 12.7 mm in width, 3.2 mm in thickness, 0.25 mm in tip radius at the center, and 1.3 mm in depth. Was formed into a test piece having a notch of, and measured in accordance with ASTM D256.
[0023]
(Examples 2 to 12 and Comparative Example 1)
Aroma was prepared in the same manner as in Example 1 except that 4,4′-dichlorodiphenyl sulfone and potassium carbonate were used at the mass ratios shown in Table 1 and the temperature of the contents was raised until the polymerization temperature shown in Table 1 was reached. A group III polyether was obtained and evaluated in the same manner as in Example 1. The results are summarized in Table 1.
[0024]
(Example 13)
Hypophosphorous acid (30% by weight aqueous solution) was added to a reaction vessel in an amount of 0.002 mol based on 81.93 parts (1 mol ratio) of 4,4′-biphenol (powder). An aromatic polyether was obtained in the same manner as in Example 1 except that the operation was performed under the same conditions, and the evaluation was performed in the same manner as in Example 1. The results are summarized in Table 1.
[0025]
[Table 1]
Figure 2004107606
[0026]
【The invention's effect】
The aromatic polyether obtained by the production method of the present invention is represented by the formula (1), and its molecular weight is as high as 35,000 or more in weight average molecular weight (Mw), for example, and its molecular weight dispersion is small.
Aromatic polyether is excellent in transparency, and its injection molded product is excellent in transparency, heat resistance and impact resistance.
Furthermore, by polymerizing the production method of the present invention in the presence of hypophosphorous acid and / or hypophosphite, an aromatic polyether having more excellent transparency can be obtained.

Claims (4)

4,4’−ビフェノールと、該4,4’−ビフェノールに対して1モル倍を超え1.05モル倍以下の式(2)
Figure 2004107606
〔式中、XおよびXはそれぞれ独立にハロゲン原子を示す。〕
で示される4,4’−ジハロゲノジフェニルスルホン類とをアルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩の存在下、ジフェニルスルホン中にて、240℃〜270℃にて重合させることを特徴とする式(1)
Figure 2004107606
〔式中、XおよびXは前記と同じ意味を示し、nは1以上の整数を示す。〕で示される芳香族ポリエーテルの製造方法。
4,4'-biphenol and a compound represented by the formula (2) having a molar ratio of more than 1 mole to 1.04 mole of the 4,4'-biphenol:
Figure 2004107606
[Wherein X 1 and X 2 each independently represent a halogen atom. ]
And 4,4′-dihalogenodiphenyl sulfones represented by the formula (I) are polymerized in diphenyl sulfone at 240 ° C. to 270 ° C. in the presence of an alkali metal carbonate and / or an alkali metal bicarbonate. Equation (1)
Figure 2004107606
[Wherein, X 1 and X 2 have the same meaning as described above, and n represents an integer of 1 or more. ] The method for producing an aromatic polyether represented by the formula:
4,4’−ビフェノール1モルに対し、アルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩を1.08モル倍以上の存在下に重合させることを特徴とする請求項1に記載の製造方法。The production method according to claim 1, wherein the polymerization is carried out in the presence of 1.08 mole times or more of an alkali metal carbonate and / or an alkali metal bicarbonate per mole of 4,4'-biphenol. 4,4’−ビフェノール1モルに対し、アルカリ金属炭酸塩及び/又はアルカリ金属重炭酸塩を1.06モル倍以上の存在下に、240〜255℃にて重合させることを特徴とする請求項1に記載の製造方法。The polymerization is carried out at 240 to 255 ° C in the presence of 1.06 mol times or more of an alkali metal carbonate and / or an alkali metal bicarbonate per 1 mol of 4,4′-biphenol. 2. The production method according to 1. 4,4’−ビフェノール1モルに対して、次亜リン酸及び/又は次亜リン酸塩0.001〜0.006モル倍の存在下に重合させることを特徴とする請求項1〜3のいずれかに記載の製造方法。The polymerization is carried out in the presence of 0.001 to 0.006 mole times of hypophosphorous acid and / or hypophosphite per mole of 4,4'-biphenol. The production method according to any one of the above.
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