JPH062862B2 - Aromatic polyester resin composition - Google Patents
Aromatic polyester resin compositionInfo
- Publication number
- JPH062862B2 JPH062862B2 JP60200246A JP20024685A JPH062862B2 JP H062862 B2 JPH062862 B2 JP H062862B2 JP 60200246 A JP60200246 A JP 60200246A JP 20024685 A JP20024685 A JP 20024685A JP H062862 B2 JPH062862 B2 JP H062862B2
- Authority
- JP
- Japan
- Prior art keywords
- aromatic polyester
- resin composition
- polyester resin
- weight
- mol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は芳香族ポリエステル樹脂組成物に関し、さらに
詳しくは、転移温度前後で線膨張係数が急激に変動する
ことがなく、とくに光ファイバーの被覆材として好適な
芳香族ポリエステル樹脂組成物に関する。Description: TECHNICAL FIELD The present invention relates to an aromatic polyester resin composition, and more specifically, to a coating material for an optical fiber, in which the linear expansion coefficient does not suddenly change around the transition temperature. And an aromatic polyester resin composition suitable as.
［従来技術および発明が解決しようとする問題点］ サーモトロピック液晶ポリマーは優れた流動性を有する
とともに配向性が高いことから、線膨張率が小さくかつ
弾性率が大きい成形品の製造に好適であるため、例えば
光ファイバー用の被覆材としての用途が提案されている
（特開昭59-107943号、特開昭59-206803号および特開昭
60-58829号の各公報）。[Problems to be Solved by Prior Art and Invention] Thermotropic liquid crystal polymers have excellent fluidity and high orientation, and thus are suitable for producing molded products having a small linear expansion coefficient and a large elastic modulus. Therefore, for example, applications as a coating material for optical fibers have been proposed (Japanese Patent Laid-Open Nos. 59-107943, 59-206803 and 59-206803).
60-58829 publications).
具体的には、かかる液晶ポリマーのうち、例えば、ポリ
エチレンテレフタレートを変性せしめて得られる液晶ポ
リマーの場合、５０℃付近に転移点が存在し、この転移
温度（Tc）より低い温度では線膨張係数が10-6 deg-1の
オーダーであり、これはガラス繊維の線膨張係数（10-7
deg-1）と極めて近接しているため、光ファイバー用被
覆材として優れたものとなる。Specifically, among such liquid crystal polymers, for example, in the case of a liquid crystal polymer obtained by modifying polyethylene terephthalate, there is a transition point near 50 ° C., and the linear expansion coefficient is lower than this transition temperature (Tc). It is on the order of 10 -6 deg -1 , which is the coefficient of linear expansion of glass fiber (10 -7
Since it is very close to deg -1 ), it is an excellent coating material for optical fibers.
ところが、このものは、転移温度以上の温度では、線膨
張係数が急激に増大して、10-4 deg-1のオーダー、すな
わち前述したTc以下のときの値に比べ約100倍となって
しまう。そのため、ガラス繊維との線膨張係数の差が極
めて大きくなり、結果として、光ファイバーが湾曲する
などの不都合が生ずる。However, in the case of this, at a temperature above the transition temperature, the linear expansion coefficient sharply increases and becomes about 100 times the value at the order of 10 -4 deg -1 , that is, below Tc described above. . Therefore, the difference in coefficient of linear expansion from the glass fiber becomes extremely large, resulting in inconvenience such as bending of the optical fiber.
本発明は、従来のかかる問題を解消し、転移温度前後で
線膨張係数が変化することなく常にガラス繊維との線膨
張係数と近似した値を保持し、光ファイバーの被覆材と
して好適な液晶ポリマーとしての芳香族ポリエステル樹
脂組成物の提供を目的とする。The present invention solves such a problem of the prior art, and always maintains a value close to the linear expansion coefficient with glass fibers without changing the linear expansion coefficient before and after the transition temperature, and as a liquid crystal polymer suitable as a coating material for optical fibers. An object of the present invention is to provide the aromatic polyester resin composition.
［問題点を解決するための手段］ 本発明者らは、上記の目的を達成すべく鋭意研究を重ね
た結果、特定の繰返し単位を有する芳香族ポリエステル
と、ポリスチレンとを所定の割合で混合してなる芳香族
ポリエステル樹脂組成物が優れた効果を示すことを見出
して本発明を完成するに到つた。[Means for Solving the Problems] As a result of intensive studies to achieve the above object, the present inventors have mixed an aromatic polyester having a specific repeating unit and polystyrene at a predetermined ratio. The present invention has been completed by finding that the aromatic polyester resin composition obtained from the above shows an excellent effect.
すなわち、本発明の芳香族ポリエステル樹脂組成物は、 次式： で示される繰り返し単位(A) 10〜35モル％、 次式： -O-CH2-CH2-O- (2) で示される繰り返し単位(B) 10〜35モル％、および 次式： で示される繰り返し単位（Ｃ）30〜80モル％を有する芳
香族ポリエステル90〜55重量％：並びにポリスチレン10
〜45重量％からなることを特徴とする。That is, the aromatic polyester resin composition of the present invention has the following formula: A repeating unit (A) of 10 to 35 mol% represented by the following formula: -O-CH 2 -CH 2 -O- (2) a repeating unit (B) of 10 to 35 mol% and the following formula: 90 to 55% by weight of an aromatic polyester having 30 to 80 mol% of the repeating unit (C) represented by:
It is characterized in that it consists of ~ 45% by weight.
［具体的説明］ 本発明の芳香族ポリエステル樹脂組成物は、前述したよ
うに、式(1)〜(3)で示される繰返し単位を有する芳香族
ポリエステル樹脂とポリスチレンとの２成分よりなる。[Specific Description] As described above, the aromatic polyester resin composition of the present invention comprises two components, an aromatic polyester resin having repeating units represented by the formulas (1) to (3) and polystyrene.
まず、第１の成分である芳香族ポリエステルにおいて、
各繰り返し単位(A)、(B)および(C)の含有量はそれぞれ1
0〜35モル％、10〜35モル％および30〜80モル％で、か
つ合計で100モル％となるように設定する。このうち、
とくに重要なものは繰り返し単位(C)の含有量であっ
て、これが30モル％未満である場合には、該芳香族ポリ
エステルが液晶を形成せず、逆に80モル％を超えると液
晶は形成するものの、成形性が低下するので好ましくな
い。さらに、この芳香族ポリエステルは、このものを例
えばフェノールとテトラクロロエタンの混合溶液（体積
比３：２）100mlに0.5g溶解せしめて得られる溶液につ
いて30℃で測定した対数粘度数が0.4〜3.0の範囲である
ことが好ましい。なお、かかる芳香族ポリエステルは、
通常の方法を適用して調製しても、また、市販品、例え
ばイーストマンコダック社製のX7Gなどを使用してもよ
い。First, in the aromatic polyester which is the first component,
The content of each repeating unit (A), (B) and (C) is 1
It is set to 0 to 35 mol%, 10 to 35 mol%, and 30 to 80 mol%, and the total amount is 100 mol%. this house,
Particularly important is the content of the repeating unit (C). When the content is less than 30 mol%, the aromatic polyester does not form a liquid crystal, and when it exceeds 80 mol%, a liquid crystal is formed. However, this is not preferable because the moldability is lowered. Further, this aromatic polyester has a logarithmic viscosity number of 0.4 to 3.0 measured at 30 ° C. with respect to a solution obtained by dissolving 0.5 g of this aromatic polyester in 100 ml of a mixed solution of phenol and tetrachloroethane (volume ratio 3: 2). It is preferably in the range. The aromatic polyester is
It may be prepared by applying a usual method, or a commercially available product such as X7G manufactured by Eastman Kodak Company may be used.
ついで、第２の成分としてはポリスチレンを使用する
が、その好ましい重量平均分子量の範囲は２００，００
０〜４００，０００である。Then, polystyrene is used as the second component, and the preferable range of the weight average molecular weight is 200,00.
It is 0 to 400,000.
本発明の芳香族ポリエステル樹脂組成物は、前述した第
１および第２の成分を混合して得られるものである。こ
のとき、第１の成分である芳香族ポリエステルの配合量
を90〜55重量％、第２の成分であるポリスチレンの配合
量を10〜45重量％とし、合計で100重量％とする必要が
ある。第１の成分が90重量％を超える場合、すなわち、
第２の成分が10重量％未満であると得られた樹脂組成物
の転移温度（Tc）以上での線膨張係数（α）の絶対値が
増大してしまう。一方、第１の成分が55重量％未満であ
る場合、すなわち、第２の成分が45重量％を超えるとα
の絶対値が増加するとともに剛性が低下してしまうので
好ましくない。好ましくは第１の成分が80〜60重量％、
第２の成分が20〜40重量％である。The aromatic polyester resin composition of the present invention is obtained by mixing the above-mentioned first and second components. At this time, the blending amount of the aromatic polyester as the first component is 90 to 55% by weight, and the blending amount of polystyrene as the second component is 10 to 45% by weight, and it is necessary to make a total of 100% by weight. . When the first component exceeds 90% by weight, that is,
If the second component is less than 10% by weight, the absolute value of the linear expansion coefficient (α) at the transition temperature (Tc) or higher of the obtained resin composition will increase. On the other hand, when the first component is less than 55% by weight, that is, when the second component exceeds 45% by weight, α
Is not preferable because the rigidity decreases as the absolute value of increases. Preferably the first component is 80-60% by weight,
The second component is 20-40% by weight.
このような本発明の芳香族ポリエステル樹脂組成物は、
各成分を上述の配合量で配合したのち、混合混練するこ
とによって容易に製造することができる。この混練工程
には、乾混法、融混併用法、多段溶融混合法、単純溶融
混合法などを適用することができ、必要に応じて、一軸
押出機、二軸混練機、コニーダー、バンバリミキサー、
ヘンシェルミキサーなどを使用することができる。Such an aromatic polyester resin composition of the present invention,
It can be easily produced by blending the respective components in the above blending amounts and then mixing and kneading. In this kneading step, a dry blending method, a fusion blending method, a multi-stage melt blending method, a simple melt blending method or the like can be applied, and if necessary, a single screw extruder, a twin screw kneader, a cokneader, a Banbury mixer. ,
A Henschel mixer or the like can be used.
なお、こうして得られた樹脂組成物を、50℃〜融点以下
の温度で5秒間〜50時間熱処理すると線膨張係数の変動
をより小さく抑えることができるため更に効果的であ
る。It is more effective to heat the resin composition thus obtained at a temperature of 50 ° C. to the melting point for 5 seconds to 50 hours because the variation of the linear expansion coefficient can be suppressed to a smaller level.
［実施例］ 表中に符号で示した芳香族ポリエステルとポリスチレン
とを表示の配合量で混合し、二軸混練機を使用して、26
0℃において溶融混練したのちペレット化した。[Examples] Aromatic polyesters and polystyrenes indicated by symbols in the table were mixed in the indicated compounding amounts, and were mixed using a twin-screw kneader.
The mixture was melt-kneaded at 0 ° C and then pelletized.
ついで、メルトテンションテスター（東洋精機製）を使
用して、上記により得られたペレットから直径0.8mmの
ファイバーを作製した。このときの条件は、成形温度26
0℃、押出速度20cm3／分、ダイス径2mmφ、L/D=10にそ
れぞれ設定した。Then, using a melt tension tester (manufactured by Toyo Seiki), fibers having a diameter of 0.8 mm were prepared from the pellets obtained as described above. The conditions at this time are molding temperature 26
The setting was 0 ° C., the extrusion rate was 20 cm 3 / min, the die diameter was 2 mmφ, and L / D = 10.
得られたファイバーを170℃、真空恒温槽中で30分間熱
処理したのち、熱分析装置（セイコー電子社製）により
-100℃〜TcおよびTc〜100℃における線膨張係数を、ま
た、粘弾性スペクトロメーター（岩本製作所製）を用い
てヤング率をそれぞれ測定して結果を表に示した。な
お、各樹脂組成物のTc（℃）も表中に併せて示した。After heat-treating the obtained fiber at 170 ° C in a vacuum thermostat for 30 minutes, use a thermal analyzer (manufactured by Seiko Denshi KK)
The linear expansion coefficient at −100 ° C. to Tc and Tc to 100 ° C. and the Young's modulus were measured using a viscoelasticity spectrometer (manufactured by Iwamoto Seisakusho), and the results are shown in the table. The Tc (° C) of each resin composition is also shown in the table.
また、表中に符号で示した芳香族ポリエステルおよびポ
リスチレンは以下のようなものである。The aromatic polyesters and polystyrenes indicated by the symbols in the table are as follows.
(1)芳香族ポリエステル： （イ）X7G(イーストマンコダック社製；対数粘度数：
0.80、p-アセトキシ安息香酸量：60モル％） （ロ）X7G(イーストマンコダック社製；対数粘度数：
0.54、p-アセトキシ安息香酸量：50モル％） （ハ）X7G(イーストマンコダック社製；対数粘度数：
0.80、p-アセトキシ安息香酸量：70モル％） (2)ポリスチレン ポリスチレン（出光石油化学（株）製；出光ポリスチレ
ンNF20、重量平均分子量：200,000） ［発明の効果］ 以上の説明から明らかなように、本発明の芳香族ポリエ
ステル樹脂組成物は、その転移温度(Tc)前後における線
膨張係数の変化が従来の光ファイバー用被覆材に比べて
小さく、しかも、充分な弾性率を有するため、光ファイ
バー用の被覆材として使用した場合に、線膨張係数の差
異に起因するファイバーの湾曲などが発生することがな
い。したがって、その工業的価値は極めて大である。(1) Aromatic polyester: (ii) X7G (manufactured by Eastman Kodak Co .; logarithmic viscosity number:
0.80, p-acetoxybenzoic acid amount: 60 mol%) (b) X7G (manufactured by Eastman Kodak Co .; logarithmic viscosity number:
0.54, p-acetoxybenzoic acid amount: 50 mol%) (c) X7G (manufactured by Eastman Kodak Co .; logarithmic viscosity number:
0.80, p-acetoxybenzoic acid amount: 70 mol%) (2) Polystyrene Polystyrene (manufactured by Idemitsu Petrochemical Co., Ltd .; Idemitsu polystyrene NF20, weight average molecular weight: 200,000) [Effects of the Invention] As is clear from the above description, the aromatic polyester resin composition of the present invention has a smaller change in the linear expansion coefficient before and after its transition temperature (Tc) as compared with the conventional coating material for an optical fiber, Moreover, since it has a sufficient elastic modulus, when it is used as a coating material for an optical fiber, the bending of the fiber due to the difference in the coefficient of linear expansion does not occur. Therefore, its industrial value is extremely large.
Claims (1)
び 次式： で示される繰り返し単位（Ｃ）３０〜８０モル％を有す
る芳香族ポリエステル９０〜５５重量％；並びにポリス
チレン１０〜４５重量％からなることを特徴とする芳香
族ポリエステル樹脂組成物。1. The following formula: 10 to 35 mol% of a repeating unit (A) represented by the following formula: 10 to 35 mol% of a repeating unit (B) represented by the following formula: —O—CH 2 —CH 2 —O— (2), and the following formula: An aromatic polyester resin composition comprising 90 to 55% by weight of an aromatic polyester having a repeating unit (C) of 30 to 80% by weight; and 10 to 45% by weight of polystyrene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60200246A JPH062862B2 (en) | 1985-09-10 | 1985-09-10 | Aromatic polyester resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60200246A JPH062862B2 (en) | 1985-09-10 | 1985-09-10 | Aromatic polyester resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6259662A JPS6259662A (en) | 1987-03-16 |
| JPH062862B2 true JPH062862B2 (en) | 1994-01-12 |
Family
ID=16421212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60200246A Expired - Lifetime JPH062862B2 (en) | 1985-09-10 | 1985-09-10 | Aromatic polyester resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062862B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS636046A (en) * | 1986-06-26 | 1988-01-12 | Idemitsu Petrochem Co Ltd | Aromatic polyester resin composition |
| JPH01182360A (en) * | 1988-01-14 | 1989-07-20 | Asahi Chem Ind Co Ltd | Polyester composition with liquid crystal nature |
| JPH0618937B2 (en) * | 1988-06-01 | 1994-03-16 | チッソ株式会社 | Thermoplastic resin composition for small-diameter stick and small-diameter stick using the same |
| JP2702172B2 (en) * | 1988-09-16 | 1998-01-21 | 三井東圧化学株式会社 | Polypropylene resin composition |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56115357A (en) * | 1979-11-30 | 1981-09-10 | Ici Ltd | Melt workable polymer composition having improved workability |
| JPS58201850A (en) * | 1982-05-03 | 1983-11-24 | バイエル・アクチエンゲゼルシヤフト | Mixture of mesomorphous polycondensate and partially crystal thermoplast, manufacture and use |
| JPS5947229A (en) * | 1982-09-13 | 1984-03-16 | Mitsubishi Chem Ind Ltd | Resin composition |
| JPS6093407A (en) * | 1983-10-28 | 1985-05-25 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber core |
| JPS6093406A (en) * | 1983-10-28 | 1985-05-25 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber core |
| JPS6114616A (en) * | 1984-06-29 | 1986-01-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber core |
-
1985
- 1985-09-10 JP JP60200246A patent/JPH062862B2/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56115357A (en) * | 1979-11-30 | 1981-09-10 | Ici Ltd | Melt workable polymer composition having improved workability |
| JPS58201850A (en) * | 1982-05-03 | 1983-11-24 | バイエル・アクチエンゲゼルシヤフト | Mixture of mesomorphous polycondensate and partially crystal thermoplast, manufacture and use |
| JPS5947229A (en) * | 1982-09-13 | 1984-03-16 | Mitsubishi Chem Ind Ltd | Resin composition |
| JPS6093407A (en) * | 1983-10-28 | 1985-05-25 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber core |
| JPS6093406A (en) * | 1983-10-28 | 1985-05-25 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber core |
| JPS6114616A (en) * | 1984-06-29 | 1986-01-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6259662A (en) | 1987-03-16 |
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