JP3062537B2 - Polymer for fiber sheath material - Google Patents
Polymer for fiber sheath materialInfo
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- JP3062537B2 JP3062537B2 JP63193441A JP19344188A JP3062537B2 JP 3062537 B2 JP3062537 B2 JP 3062537B2 JP 63193441 A JP63193441 A JP 63193441A JP 19344188 A JP19344188 A JP 19344188A JP 3062537 B2 JP3062537 B2 JP 3062537B2
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は光フアイバの鞘として有用に使用される新規
な共重合体に関するものであり、とくに、着色度が少な
く透明性に優れた光フアイバ用鞘用重合体に関するもの
である。Description: TECHNICAL FIELD The present invention relates to a novel copolymer useful as a sheath of an optical fiber, and in particular, to an optical fiber having a low degree of coloring and excellent transparency. The present invention relates to a sheath polymer.
光フアイバの鞘材として要求される特性は、芯成分の
屈折率よりも低い屈折率を備えていること、高い透明性
を有すること、高い耐熱性を備えていること、芯成分に
対する高い接着性を備えていること、高い機械的強度を
有すること、熱成形時に熱分解を起しにくいことなどが
挙げられる。The characteristics required for the sheath material of the optical fiber are that it has a refractive index lower than that of the core component, has high transparency, has high heat resistance, and has high adhesiveness to the core component. , High mechanical strength, and low thermal decomposition during thermoforming.
従来より、これらの特性を備えた鞘用ポリマーの開発
が進められており例えば特公昭43−8979号公報、特開昭
49−107780号公報、特開昭61−66706号公報、特開昭62
−265606号公報などに示されるフルオロアルキルメタク
リレートの単独重合体や共重合体が知られている。Hitherto, the development of a sheath polymer having these properties has been promoted. For example, Japanese Patent Publication No. 43-8979,
49-107780, JP-A-61-66706, JP-A-62
Homopolymers and copolymers of fluoroalkyl methacrylates described in, for example, JP-A-265606 are known.
しかし、これらの発明により得られる鞘材用重合体は
重合体自体が着色を有していることであり、このような
着色を帯びた重合体を鞘材とした光フアイバの伝送損失
を小さなものとすることはできず、光伝送損失の少ない
光フアイバとするには更に着色度の少ない鞘用重合体の
開発が望まれている。However, the polymer for the sheath material obtained by these inventions is that the polymer itself has coloring, and the transmission loss of the optical fiber using such a colored polymer as the sheath material is small. However, in order to obtain an optical fiber having a small optical transmission loss, it is desired to develop a sheath polymer having a lower degree of coloring.
そこで本発明者等は上記目的を達成し得た着色度の少
ない鞘用重合体を得ることを検討した結果、フルオロア
ルキルメタクリレート40〜99.9重量％とその他の共重合
可能な単量体１〜60重量％からなる単量体混合物中の重
合禁止剤含有量が20ppm以下、溶存酸素含有量が20ppm以
下である単量体成分を重合して得たフツ素化アルキルメ
タクリレート重合体よりなる光フアイバ鞘材用重合体が
その目的を達成しうるものであることを見出し本発明を
完成した。Therefore, the present inventors have studied to obtain a sheath polymer having a low degree of coloration that has achieved the above object, and as a result, it has been found that 40 to 99.9% by weight of fluoroalkyl methacrylate and other copolymerizable monomers 1 to 60 An optical fiber sheath comprising a fluorinated alkyl methacrylate polymer obtained by polymerizing a monomer component having a polymerization inhibitor content of 20 ppm or less and a dissolved oxygen content of 20 ppm or less in a monomer mixture consisting of 100% by weight. The present inventors have found that a material polymer can achieve the object and completed the present invention.
本発明で鞘材用重合体を作るに際して用いる単量体中
には重合禁止剤としてはラジカル重合禁止剤例えばベン
ゾキノン、クロラニル、ｐ−ｔ−ブチルカテコール、ヒ
ドロキノン、ｍ−ジニトロベンゼン、ハイドロキノンモ
ノメチルエーテル等が配合されており、そのいずれも単
量体の重合反応中あるいは重合体の鞘材としての溶融押
出中に着色物質に変わり重合体を着色させる。またこれ
ら単量体中に酸素が溶存されているとその重合体に着色
がさらに著しくなる。Among the monomers used in producing the polymer for the sheath material in the present invention, the polymerization inhibitors include radical polymerization inhibitors such as benzoquinone, chloranil, pt-butylcatechol, hydroquinone, m-dinitrobenzene, and hydroquinone monomethyl ether. Are converted into coloring substances during the polymerization reaction of the monomer or during the melt extrusion as a sheath material of the polymer, thereby coloring the polymer. Further, when oxygen is dissolved in these monomers, the polymer becomes more markedly colored.
本発明者らが種々検討した結果、これら単量体中の重
合禁止剤含有量が20ppmを越えたものを重合して得た重
合体を鞘材として光フアイバはその光伝送損失が顕著と
なる。とくに、単量体中の重合禁止剤含量が10ppm以下
としたものを用いて得た重合体はその着色が顕著に小さ
く光フアイバ用鞘材として優れた特性を備えている。As a result of various studies by the present inventors, an optical fiber having a polymerization inhibitor content of more than 20 ppm in these monomers as a sheath material has an optical fiber having a remarkable optical transmission loss. . In particular, a polymer obtained by using a polymer having a polymerization inhibitor content of 10 ppm or less in a monomer has remarkably small coloring and has excellent properties as a sheath material for an optical fiber.
本発明で用いる鞘用重合体原料として用いるフルオロ
アルキルメタクリレート単量体はメタクリル酸メチル等
の分子中にフツ素を含まない単量体に比べ飽和溶存酸素
含有量が大きく例えば室温にて空気を飽和させると では110ppm、メタクリル酸メチルでは60ppmの飽和溶存
酸素含有量となり、このような溶存酸素含有量の多いフ
ルオロアルキルメタクリレートを重合して得た重合体は
着色度の大きなものとなる。そこで、フルオロアルキル
メタクリレート単量体は重合反応中も酸素の溶解を防く
方策をとることが特に好ましい。単量体中に溶存酸素含
有量が20ppmを越えたフルオロアルキルメタクリレート
を重合して得た重合体は着色度が大きく、この重合体を
鞘とした光フアイバの光伝送損失の増加が顕著となるの
で鞘材を作るに際して用いるフツ化アルキルメタクリレ
ート中の溶存酸素含有量は5ppm以下とするのがさらに好
しい。The fluoroalkyl methacrylate monomer used as a raw material for the sheath polymer used in the present invention has a higher saturated dissolved oxygen content than a monomer containing no fluorine in a molecule such as methyl methacrylate, and saturates air at room temperature, for example. Let me , And methyl methacrylate has a saturated dissolved oxygen content of 60 ppm, and a polymer obtained by polymerizing such a fluoroalkyl methacrylate having a large dissolved oxygen content has a high degree of coloring. Therefore, it is particularly preferable to take measures to prevent the fluoroalkyl methacrylate monomer from dissolving oxygen even during the polymerization reaction. A polymer obtained by polymerizing a fluoroalkyl methacrylate having a dissolved oxygen content exceeding 20 ppm in the monomer has a high degree of coloring, and the increase in light transmission loss of an optical fiber sheathed with this polymer becomes remarkable. Therefore, the content of dissolved oxygen in the fluorinated alkyl methacrylate used for producing the sheath material is more preferably 5 ppm or less.
本発明において使用する単量体より重合禁止剤を除去
する方法としては（イ）化学的処理により取除く方法
（ロ）蒸留により取除く方法を取り得るが重合禁止剤は
一般に常温で固体であり蒸気圧が極めて低いので単量体
を蒸留精製する方法を用いるのがよい。また使用する単
量体中より溶存酸素を取除く方法としては（ｉ）還元剤
を用いて安定な化合物に変化させる方法（ii）不活性気
体と接触せしめ同伴除去する方法を取り得るが、当該溶
存酸素除去工程の簡便性からこれら単量体を不活性気体
を吹込んで接触せしめ同伴除去する方法をとるのが特に
好しい。The method of removing the polymerization inhibitor from the monomer used in the present invention may be (a) a method of removing by a chemical treatment, or (b) a method of removing by distillation, but the polymerization inhibitor is generally a solid at ordinary temperature. Since the vapor pressure is extremely low, a method of purifying the monomer by distillation is preferably used. As a method for removing dissolved oxygen from the monomer to be used, (i) a method of converting the compound into a stable compound using a reducing agent, and (ii) a method of bringing the monomer into contact with an inert gas and removing it by entrainment can be employed. In view of the simplicity of the dissolved oxygen removing step, it is particularly preferable to employ a method of bringing these monomers into contact with each other by blowing an inert gas to remove them together.
本発明の鞘用重合体を製造するに際して用いる単量体
中のフルオロアルキルメタクリレートの使用量は得られ
る重合体の屈折率を充分低く保つため40重量％以上とす
ることが必要である。また当該重合体の機械的強度、芯
材との密着性等の諸特性を満足させ得るためにはフルオ
ロアルキルメタクリレートが （式中ｂは１〜３の整数、ＸはH,F又はClを示す） で示される単量体10−70重量％と （式中ｄは６〜13の整数、Ｘは前記に同じ） で示される単量体30−90重量％で構成されることが特に
好ましい。The amount of the fluoroalkyl methacrylate used in the monomer used for producing the sheath polymer of the present invention must be 40% by weight or more in order to keep the refractive index of the obtained polymer sufficiently low. Further, in order to satisfy various properties such as mechanical strength of the polymer and adhesion to a core material, a fluoroalkyl methacrylate is used. (Where b is an integer of 1 to 3, and X represents H, F or Cl). (Wherein d is an integer of 6 to 13 and X is the same as described above).
これらフルオロアルキルメタクリレートと共重合可能
な単量体成分としてはメタクリル酸メチル等のメタクリ
ル酸エステル誘導体、アクリル酸エステル誘導体、メタ
クリル酸、アクリル酸等の酸成分、α−フルオロアクリ
ル酸及びそのエステル誘導体、マレイミド及びその誘導
体、ビニルエステル誘導体などが挙げられる。As the monomer components copolymerizable with these fluoroalkyl methacrylates, methacrylate derivatives such as methyl methacrylate, acrylate derivatives, methacrylic acid, acid components such as acrylic acid, α-fluoroacrylic acid and its ester derivatives, Maleimide and its derivatives, vinyl ester derivatives and the like can be mentioned.
本発明の鞘用重合体は上述した条件を満足した単量体
を酸素ガスの影響を受けない状態として溶液重合法、塊
状重合法とを採用して作ることができる。The polymer for a sheath of the present invention can be prepared by employing a solution polymerization method and a bulk polymerization method in which a monomer satisfying the above conditions is not affected by oxygen gas.
本発明は上述したようにフルオロアルキルメタクリレ
ートとその他の共重合可能な単量体との単量体混合物中
の重合禁止剤含有量及び溶存酸素含有量を特定量以下に
同時に満足するように規定し、重合してなるものである
ことを最も大きな特徴とするものである。As described above, the present invention specifies that the polymerization inhibitor content and the dissolved oxygen content in a monomer mixture of a fluoroalkyl methacrylate and another copolymerizable monomer are simultaneously satisfied to a specific amount or less. The most characteristic feature is that it is obtained by polymerization.
本発明の鞘用重合体はこの結果、黄色の着色度が極め
て少なく、かつ透明性に優れたものであり、この重合体
を鞘とした光フアイバは鞘による光の吸収や乱反射によ
る光伝送損失の増大を極力少なくしたものとすることが
できるため、光伝送特性の良好な光フアイバとなるので
ある。As a result, the sheath polymer of the present invention has a very low degree of yellow coloring and excellent transparency, and an optical fiber sheathed with this polymer has a light transmission loss due to light absorption and irregular reflection by the sheath. Therefore, the optical fiber having good optical transmission characteristics can be obtained.
以下、実施例により本発明を更に詳しく説明する。 Hereinafter, the present invention will be described in more detail with reference to examples.
実施例１ 市販の下記構造のフルオロアルキルメタクリレート （以下17FM、称す）をガスクロマトグラフ法にて分析を
行なうと重合禁止剤としてハイドロキノン（以下HQと称
す）が100ppm含まれていた。17FMを留出温度94℃、真空
度5mm Hgにて単蒸留を行なつたところHQ含有量は5ppmと
なつた。Example 1 Commercially available fluoroalkyl methacrylate of the following structure (17FM) was analyzed by gas chromatography to find that 100 ppm of hydroquinone (HQ) was contained as a polymerization inhibitor. When 17FM was subjected to simple distillation at a distillation temperature of 94 ° C. and a degree of vacuum of 5 mm Hg, the HQ content was 5 ppm.
市販の下記構造のフルオロアルキルメタクリレート （以下3FMと称す）をガスクロマトグラフ法にて分析を
行なうとハイドロキノンモノメチルエーテル（以下MEHQ
と称す）が100ppm含まれていた。3FMを留出温度30℃、
真空度33mm Hgにて単蒸留を行なつたところMEHQ量含有
量は7ppmとなつた。蒸留した17FM50重量％、蒸留した3F
M30重量％精製された重合禁止剤を含まないメタクリル
酸メチル（以下MMAと称す）19重量％、メタクリル酸
（以下MAAと称す）１重量％からなる単量体混合物に対
しｎ−オクチルメルカプタン3000ppm、2,2′−アゾビス
イソブチロニトリル1000ppmを加え均一に攪拌混合し、
この混合物を孔径0.1μのメンブレンフイルターにて
過し精製窒素ガス（酸素濃度0.05ppm以下、CO2 0.2ppm
以下）で１時間バブリングしたところ溶存酸素含有量は
6ppmとなつた。引続き窒素ガス中にてこの混合物を300m
m×300mm×5mmのシリコン・ゴムの枠を用いたガラスセ
ルキヤスト板内に仕込み、70℃にて15HR、120℃にて２
時間重合反応後、重合率93％の重合体を得た。この重合
体を170℃の真空乾燥キ内にて10時間脱揮処理を行な
い、残存単量体0.3重量％、極限粘度〔η〕＝0.45dl/g
（MEK、25℃）の鞘材重合体を得た。Commercially available fluoroalkyl methacrylate of the following structure (Hereinafter referred to as 3FM) is analyzed by gas chromatography to obtain hydroquinone monomethyl ether (hereinafter MEHQ).
) Was contained in 100 ppm. 3FM distilling temperature 30 ℃,
When simple distillation was performed at a degree of vacuum of 33 mm Hg, the MEHQ content was 7 ppm. Distilled 17FM50% by weight, distilled 3F
N-octyl mercaptan 3000 ppm based on a monomer mixture consisting of M 30% by weight of a purified polymerization inhibitor-free methyl methacrylate (hereinafter, referred to as MMA) 19% by weight and methacrylic acid (hereinafter, referred to as MAA) 1% by weight, 1000 ppm of 2,2'-azobisisobutyronitrile was added and uniformly stirred and mixed.
This mixture was passed through a membrane filter having a pore size of 0.1 µ and purified nitrogen gas (oxygen concentration: 0.05 ppm or less, CO 2 0.2 ppm
After bubbling for 1 hour, the dissolved oxygen content becomes
6 ppm. Continue to mix this mixture in nitrogen gas for 300m
Prepared in a glass cell cast plate using a silicone rubber frame of mx 300mm x 5mm, 15HR at 70 ° C, 2 at 120 ° C
After the polymerization reaction for a period of time, a polymer having a conversion of 93% was obtained. The polymer was subjected to a devolatilization treatment in a vacuum drying oven at 170 ° C. for 10 hours to obtain a residual monomer of 0.3% by weight and an intrinsic viscosity [η] of 0.45 dl / g.
(MEK, 25 ° C.) to obtain a sheath polymer.
この重合体を鞘材としポリメタクリル酸メチルを芯と
するプラスチツク光フアイバを複合紡糸法によつて作つ
た。この光フアイバの光伝送性能は650nm、520nmにてそ
れぞれ188dB/Km、92dB/Kmと良好であつた。A plastic optical fiber using this polymer as a sheath material and polymethyl methacrylate as a core was prepared by a composite spinning method. The optical transmission performance of this optical fiber was as good as 188 dB / Km and 92 dB / Km at 650 nm and 520 nm, respectively.
比較例１ 実施例１で用いた市販の17FM（HQ含量100ppm）、3FM
（MEHQ含量100ppm）を単量体として用いる以外は実施例
１と同様の手法にて鞘材重合体を得た（残存単量体0.3
重量％、〔η〕＝0.47dl/g）。Comparative Example 1 Commercially available 17FM (HQ content: 100 ppm) and 3FM used in Example 1.
A sheath polymer was obtained in the same manner as in Example 1 except that (MEHQ content: 100 ppm) was used as a monomer (residual monomer 0.3).
Wt%, [η] = 0.47 dl / g).
この重合体を鞘材とし、ポリメタクリル酸メチルを芯
材とするプラスチツク光フアイバを得た。使用した単量
体中の総重合禁止剤含有量、溶存酸素含有量及び得られ
たフアイバの光伝送性能を表−１に示す。A plastic optical fiber using this polymer as a sheath material and polymethyl methacrylate as a core material was obtained. Table 1 shows the total polymerization inhibitor content, dissolved oxygen content, and optical transmission performance of the obtained fiber in the monomers used.
比較例２ 単量体として実施例１で用いたものと同じ市販の17F
M、3FMを用い、単量体混合物調合時窒素バブリング操作
を行なわない以外は実施例１と同様の手法にて鞘材重合
体を得た（残存単量体0.3重量％、〔η〕＝0.47dl/
g）。単量体中の溶存酸素含有量は95ppmであつた。Comparative Example 2 Same commercially available 17F as the monomer used in Example 1
Using M and 3FM, a sheath polymer was obtained in the same manner as in Example 1 except that the nitrogen bubbling operation was not performed during the preparation of the monomer mixture (residual monomer 0.3% by weight, [η] = 0.47). dl /
g). The dissolved oxygen content in the monomer was 95 ppm.
この重合体を鞘材としポリメタクリル酸メチルを芯材
とするプラスチツク光フアイバを得た。使用した単量体
中の総重合禁止剤含有量、溶存酸素含有量及び得られた
フアイバの光伝送性能を表−１に示す。A plastic optical fiber using this polymer as a sheath material and polymethyl methacrylate as a core material was obtained. Table 1 shows the total polymerization inhibitor content, dissolved oxygen content, and optical transmission performance of the obtained fiber in the monomers used.
実施例２ 市販の下記構造のフルオロアルキルメタクリレート混
合物 をガスクロマトグラフ法にて分析を行なうと重合禁止剤
としてHQが20ppm含まれていた。この混合物単量体を留
出温度75〜103℃、真空度5mm Hgにて単蒸留を行なつた
ところ含有HQは15ppmとなつた。Example 2 A commercially available fluoroalkyl methacrylate mixture having the following structure Was analyzed by gas chromatography to find that 20 ppm of HQ was contained as a polymerization inhibitor. The monomer mixture was subjected to simple distillation at a distillation temperature of 75 to 103 ° C. and a degree of vacuum of 5 mm Hg. As a result, the content of HQ was 15 ppm.
市販の下記構造のフルオロアルキルメタクリレート をガスクロマトグラフ法にて分析を行なうとMEHQが100p
pm含まれていた。この5FMを留出温度90℃、真空度20mm
Hgにて単蒸留を行なつたところ含有MEHQ量は5ppmとなつ
た。Commercially available fluoroalkyl methacrylate of the following structure Was analyzed by gas chromatography and MEHQ was 100p
PM was included. This 5FM is distilled at 90 ° C and vacuum degree is 20mm
When simple distillation was performed with Hg, the contained MEHQ amount was 5 ppm.
蒸留した長鎖フルオロアルキルメタクリレート単量体
混合物65重量％、蒸留した5FM15重量％、精製された重
合禁止剤を含まないメタクリル酸メチル17重量％、アク
リル酸（MA）３重量％からなる単量体混合物に対しｎ−
オクチルメルカプタン3000ppm、2,2′−アゾビスイソブ
チロニトリル1000ppmを加え均一に攪拌混合し、0.1μｍ
のテフロン・フイルターにてろ過し精製窒素ガスで１時
間バブリングし溶存酸素濃度10ppmとした。引続き窒素
ガス中にてこの単量体混合物を300mm×300mm×5mmのシ
リコン・ゴムの枠を用いたガラスセルキヤスト板内に仕
込み70℃にて15時間、120℃にて２時間重合反応後、重
合率91％の重合体を得た。この重合体を30mmφの２ベン
トタイプ２軸脱揮押出機に供給し、ベント部真空度5mm
Hg、ベント部温度230℃、ダイ部温度230℃にて3kg/時の
速度にて脱揮処理を行ない残存単量体0.2重量％、
〔η〕＝0.43dl/gの鞘材重合体を得た。Monomer consisting of distilled long chain fluoroalkyl methacrylate monomer mixture 65% by weight, distilled 5FM 15% by weight, purified methyl methacrylate without polymerization inhibitor 17% by weight, acrylic acid (MA) 3% by weight N- for the mixture
Add octyl mercaptan 3000ppm, 2,2'-azobisisobutyronitrile 1000ppm, stir and mix uniformly, 0.1μm
And filtered with a purified Teflon filter and bubbled with purified nitrogen gas for 1 hour to obtain a dissolved oxygen concentration of 10 ppm. Subsequently, in a nitrogen gas, the monomer mixture was charged into a glass cell cast plate using a silicon rubber frame of 300 mm × 300 mm × 5 mm, and the polymerization reaction was performed at 70 ° C. for 15 hours and at 120 ° C. for 2 hours. A polymer having a conversion of 91% was obtained. This polymer was fed to a 30 mmφ 2-vent type twin-screw devolatilizing extruder, and the degree of vacuum at the vent was 5 mm.
Hg, devolatilization at a rate of 3 kg / hour at a vent temperature of 230 ° C. and a die temperature of 230 ° C., 0.2% by weight of residual monomer,
A sheath polymer having [η] of 0.43 dl / g was obtained.
この重合体を石英ガラス母材（ダイヤジルSP三菱金属
社製）を溶融温度2200℃にて線引した芯材の上に溶融被
覆した光フアイバを得た。使用した単量体中の総重合禁
止剤含有量、溶存酸素含有量及び得られたフアイバの光
伝送性能を表−１に示す。An optical fiber in which this polymer was melt-coated on a core material obtained by drawing a quartz glass base material (Diasil SP Mitsubishi Metal Co., Ltd.) at a melting temperature of 2200 ° C. was obtained. Table 1 shows the total polymerization inhibitor content, dissolved oxygen content, and optical transmission performance of the obtained fiber in the monomers used.
比較例３ 実施例２で用いたHQ200ppmを含む市販の長鎖フルオロ
アルキルメタクリレート混合物単量体と5FM（MEHQ100pp
m含む）を単量体として用い、重合用単量体混合物調合
時窒素バブリング操作を行なわない以外は実施例２と同
様の手法にて重合並びに脱揮処理を行い、残存単量体0.
2重量％、［η］＝0.45dl/gの鞘材重合体を得た。Comparative Example 3 A commercially available long-chain fluoroalkyl methacrylate mixture monomer containing 200 ppm of HQ used in Example 2 and 5FM (MEHQ100pp
m) is used as a monomer, and polymerization and devolatilization treatment are carried out in the same manner as in Example 2 except that nitrogen bubbling operation is not carried out at the time of preparing a monomer mixture for polymerization, and the remaining monomer 0.1.
A sheath polymer of 2% by weight and [η] = 0.45 dl / g was obtained.
この重合体を実施例２で用いた石英ガラス母材を溶融
温度2200℃にて線引した芯材の上に溶融被覆し光フアイ
バを得た。使用した単量体中の総重合禁止剤含有量、溶
存酸素含有量及び得られたフアイバの光伝送性能を表−
１に示す。This polymer was melt-coated on a core material drawn at the melting temperature of 2200 ° C. with the quartz glass base material used in Example 2 to obtain an optical fiber. Table 1 shows the total polymerization inhibitor content, dissolved oxygen content, and optical transmission performance of the obtained fiber in the monomers used.
It is shown in FIG.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 魚津 吉弘 広島県大竹市御幸町20番１号 三菱レイ ヨン株式会社内 (72)発明者 島田 勝彦 広島県大竹市御幸町20番１号 三菱レイ ヨン株式会社内 (72)発明者 羽原 英明 広島県大竹市御幸町20番１号 三菱レイ ヨン株式会社内 (72)発明者 久保 功 広島県大竹市御幸町20番１号 三菱レイ ヨン株式会社内 (72)発明者 山本 隆 広島県大竹市御幸町20番１号 三菱レイ ヨン株式会社内 (72)発明者 杉森 輝彦 広島県大竹市御幸町20番１号 三菱レイ ヨン株式会社内 (56)参考文献 特開 昭61−66706（ＪＰ，Ａ) 特開 昭62−265606（ＪＰ，Ａ) 特開 昭62−89908（ＪＰ，Ａ) 特開 昭62−171946（ＪＰ，Ａ) 特開 昭62−235906（ＪＰ，Ａ) 特開 昭61−272706（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshihiro Uozu 20-1, Miyukicho, Otake City, Hiroshima Prefecture Inside Mitsubishi Rayon Co., Ltd. (72) Katsuhiko Shimada 20-1, Miyukicho, Otake City, Hiroshima Prefecture Mitsubishi Rayon (72) Inventor Hideaki Hahara 20-1, Miyukicho, Otake City, Hiroshima Prefecture Inside Mitsubishi Rayon Co., Ltd. (72) Inventor Isao Kubo 20-1, Miyukicho, Otake City, Hiroshima Prefecture Mitsubishi Rayon Co., Ltd. 72) Inventor Takashi Yamamoto 20-1, Miyukicho, Otake City, Hiroshima Prefecture Inside Mitsubishi Rayon Co., Ltd. (72) Inventor Teruhiko Sugimori 20-1, Miyukicho, Otake City, Hiroshima Prefecture Inside Mitsubishi Rayon Co., Ltd. (56) References JP-A-61-66706 (JP, A) JP-A-62-265606 (JP, A) JP-A-62-89908 (JP, A) JP-A-62-171946 (JP, A) JP-A-62-235906 (JP, ) Patent Akira 61-272706 (JP, A)
Claims (2)
重量％とその他の共重合可能な単量体成分0.1〜60重量
％とよりなる単量体混合物中の重合禁止剤含有量が20pp
m以下、溶存酸素含有量が20ppm以下として重合した光フ
アイバ鞘材用重合体。1. A fluoroalkyl methacrylate of 40 to 99.9.
20% by weight of the polymerization inhibitor in the monomer mixture consisting of 0.1% by weight and 0.1 to 60% by weight of other copolymerizable monomer components
m and a dissolved oxygen content of 20 ppm or less.
とする特許請求の範囲第１項記載の光フアイバ鞘材用重
合体。2. The method of claim 2, wherein the fluoroalkyl methacrylate is (B is an integer of 1 to 3, X represents H, Cl or F) (Wherein d is an integer of 6 to 13 and X is the same group as described above). 30.90% by weight of a monomer represented by the following formula: Polymer for fiber sheath material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63193441A JP3062537B2 (en) | 1988-08-04 | 1988-08-04 | Polymer for fiber sheath material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63193441A JP3062537B2 (en) | 1988-08-04 | 1988-08-04 | Polymer for fiber sheath material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0243507A JPH0243507A (en) | 1990-02-14 |
| JP3062537B2 true JP3062537B2 (en) | 2000-07-10 |
Family
ID=16308041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63193441A Expired - Lifetime JP3062537B2 (en) | 1988-08-04 | 1988-08-04 | Polymer for fiber sheath material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3062537B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5034466A (en) * | 1990-04-30 | 1991-07-23 | Shell Oil Company | Polymer and process for making the same |
| JP3326796B2 (en) * | 1991-01-31 | 2002-09-24 | 大日本インキ化学工業株式会社 | Curable composition and curing method thereof |
| JP4933875B2 (en) * | 2006-10-31 | 2012-05-16 | 三菱レイヨン株式会社 | Method and apparatus for producing polymer for optical material |
| US9798043B2 (en) | 2014-01-23 | 2017-10-24 | Mitsubishi Chemical Corporation | Optical fiber, optical fiber cable and communication equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0711604B2 (en) * | 1984-09-10 | 1995-02-08 | 旭化成工業株式会社 | Optical fiber sheath material polymer |
| JPS6289908A (en) * | 1985-10-16 | 1987-04-24 | Sumitomo Electric Ind Ltd | Production of low-loss plastic optical fiber |
| JPS62171946A (en) * | 1986-01-27 | 1987-07-28 | Nippon Kayaku Co Ltd | Coating agent for optical glass fiber |
| JPS62235906A (en) * | 1986-04-07 | 1987-10-16 | Mitsubishi Rayon Co Ltd | Production of optical fiber |
| JPH0711605B2 (en) * | 1986-05-14 | 1995-02-08 | 旭化成工業株式会社 | Optical fiber sheath material polymer |
-
1988
- 1988-08-04 JP JP63193441A patent/JP3062537B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0243507A (en) | 1990-02-14 |
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