JPH0638125B2 - Method for producing light-focusing plastic - Google Patents
Method for producing light-focusing plasticInfo
- Publication number
- JPH0638125B2 JPH0638125B2 JP60165323A JP16532385A JPH0638125B2 JP H0638125 B2 JPH0638125 B2 JP H0638125B2 JP 60165323 A JP60165323 A JP 60165323A JP 16532385 A JP16532385 A JP 16532385A JP H0638125 B2 JPH0638125 B2 JP H0638125B2
- Authority
- JP
- Japan
- Prior art keywords
- vinyl monomer
- light
- plastic
- focusing
- bifunctional
- 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
- Optical Couplings Of Light Guides (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Polymerisation Methods In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は例えば光フアイバーを半導体レーザとの結合
に使用する光集束性プラスチツクの製造方法に関する。Description: FIELD OF THE INVENTION The present invention relates to a method for manufacturing a light-focusing plastic using, for example, an optical fiber for coupling with a semiconductor laser.
多重通信，テレビ電話などには，現在光通信が最有力視
されており，屈折率分布を持つた光集束性プラスチツク
は，半導体レーザと光フアイバーの結合のために開発を
急がれている。つまり，普通の光学レンズでは高価す
ぎ，又機械的結合性を考えると平面レンズが望ましいか
らである。しかも，プラスチツク製品には同一仕様のも
のを大量に生産することができるという利点がある。Optical communication is currently considered to be the most promising for multiplex communication and videophone, and a light-focusing plastic with a refractive index distribution is urgently developed for coupling a semiconductor laser and an optical fiber. That is, a normal optical lens is too expensive, and a flat lens is desirable in view of mechanical coupling. Moreover, plastic products have the advantage that they can be mass-produced with the same specifications.
既に，大塚，中本らは，アプライド・フイジカル・レタ
ーズ第29巻第559頁（1976年発行）に，内径3.2mmのガラ
ス管中に反応性比（r1,r2）の異なる２種のビニルモノ
マー（r1＞１，r2＜１）の混合液を超高圧水銀灯により
光共重合することにより下式で示される屈折率分布を有
する光集束性プラスチツクを製造できることを報告して
いる。Already, Otsuka and Nakamoto et al. Reported in Applied Physical Letters Vol. 29, p. 559 (published in 1976) that two types of glass having an inner diameter of 3.2 mm have different reactivity ratios (r 1 , r 2 ). It has been reported that a light-focusing plastic having a refractive index distribution represented by the following formula can be produced by photocopolymerizing a mixed solution of vinyl monomers (r 1 > 1, r 2 <1) with an ultrahigh pressure mercury lamp.
〔発明が解決しようとする問題点〕 上記のような従来の光集束性プラスチツクの製造方法で
は，ビニルモノマーに通常の単官能モノマーを使用する
と，得られる光集束性プラスチツクの機械強度が弱くか
つ，上記Ａ値も比較的低いものしか得られないという問
題点があつた。 [Problems to be Solved by the Invention] In the conventional method for producing a light-focusing plastic as described above, when an ordinary monofunctional monomer is used as the vinyl monomer, the mechanical strength of the obtained light-focusing plastic is weak and There is a problem that only the above A value is relatively low.
この発明はかかる問題点を解決するためになされたもの
で，機械的強度が向上し，屈折率分布定数（Ａ）が増大
し、製造時間の短縮された光集束性プラスチツクの製造
方法を得ることを目的とする。The present invention has been made to solve the above problems, and provides a method for manufacturing a light-focusing plastic with improved mechanical strength, increased refractive index distribution constant (A), and reduced manufacturing time. With the goal.
この発明の光集束性プラスチツクの製造方法は，屈折率
および反応性比の異なる２種以上のビニルモノマーの内
で、反応性が一番大きいビニルモノマーが２官能性のも
の並びに光重合開始剤を含有するものを容器に入れて光
照射して上記ビニルモノマーを光重合するものである。The method for producing a light-focusing plastic of the present invention is a method in which, of two or more vinyl monomers having different refractive indexes and reactivity ratios, the vinyl monomer having the highest reactivity is a bifunctional one and a photopolymerization initiator. The vinyl monomer is contained in a container and irradiated with light to photopolymerize the vinyl monomer.
この発明において、反応性が一番大きいビニルモノマー
を、２官能性ビニルモノマーとしているので、先に重合
し始めるビニルモノマーの重合反応点が２倍であり、そ
の光重合速度が他のビニルモノマーに比べて極度に大き
く速い速度で多くの２官能性ビニルモノマーが重合す
る。一方、２官能性モノマーが上記のように重合して
も、共重合体を形成する他のビニルモノマーの供給が追
いつかず、屈折率分布定数が増大し、製造時間も短縮さ
れる。又、２官能性ビニルモノマーは，光照射されるこ
とにより，モノマー間に立体的な橋かけ構造を作り，三
次元ポリマーとして光集束性プラスチツクの機械強度を
向上させる。In the present invention, since the vinyl monomer having the highest reactivity is a bifunctional vinyl monomer, the polymerization reaction point of the vinyl monomer which starts to be polymerized first is doubled, and its photopolymerization rate is higher than that of other vinyl monomers. In comparison, many difunctional vinyl monomers polymerize at extremely large and fast rates. On the other hand, even if the bifunctional monomer is polymerized as described above, the supply of the other vinyl monomer forming the copolymer cannot be kept up, the refractive index distribution constant is increased, and the manufacturing time is shortened. When the bifunctional vinyl monomer is irradiated with light, it forms a three-dimensional bridge structure between the monomers and improves the mechanical strength of the light-focusing plastic as a three-dimensional polymer.
この発明の実施例による光集束性プラスチツクは以下の
ようにして製造される。即ち，ガラス管に，屈折率と反
応性比が異なり、反応性の一番大きいビニルモノマーが
２官能性ビニルモノマーである２種以上のビニルモノマ
ーと光重合開始剤の混合物をつめ，上記ガラス管を回転
させて均一に紫外線を照射することにより重合固化し屈
折率分布を形成するのである。この場合，ガラス管につ
めた混合液に紫外線を照射すると初期段階には屈折率が
低く，かつ反応性が一番大きいビニルモノマーが優先的
に共重合する。ここで、屈折率が低くかつ反応性が一番
大きいモノマーが２官能性モノマーであるので、出来上
つた光集束性プラスチツクの機械強度は著るしく向上す
る。次いで共重合が進むと屈折率が高く，反応性が２官
能性ビニルモノマーより低いビニルモノマーが後期に多
く共重合するようになる。共重合体は重合した直後に管
壁から固まつてくるので，この共重合において，屈折率
の高いビニルモノマーは光集束性プラスチツクの半径方
向に，中心部に進むに従つてより多く共重合するように
なる。この時，２官能性ビニルモノマーは重合反応点が
２倍になるので重合速度が極端に速いので，速い速度で
管壁に沈着し，モノマーの供給速度が共重合速度に追い
つかないため，高い屈折率分布をもつようになる。The light-focusing plastic according to the embodiment of the present invention is manufactured as follows. That is, the glass tube is filled with a mixture of two or more kinds of vinyl monomers having different refractive indexes and reactivity ratios, and the vinyl monomer having the highest reactivity is a bifunctional vinyl monomer, and a photopolymerization initiator. By rotating and rotating and uniformly irradiating with ultraviolet rays, they are polymerized and solidified to form a refractive index distribution. In this case, when the mixed solution filled in the glass tube is irradiated with ultraviolet rays, the vinyl monomer having a low refractive index and the highest reactivity is preferentially copolymerized in the initial stage. Here, since the monomer having a low refractive index and the highest reactivity is a bifunctional monomer, the mechanical strength of the finished light-focusing plastic is remarkably improved. Next, when the copolymerization proceeds, a large amount of a vinyl monomer having a high refractive index and a reactivity lower than that of the bifunctional vinyl monomer is copolymerized in the latter stage. Since the copolymer is solidified from the tube wall immediately after the polymerization, the vinyl monomer having a high refractive index is copolymerized more in the radial direction of the light-focusing plastic as it goes to the center in the copolymerization. Like At this time, since the polymerization reaction point of the bifunctional vinyl monomer is doubled, the polymerization rate is extremely fast, so that it deposits on the pipe wall at a high rate and the monomer supply rate cannot keep up with the copolymerization rate, resulting in a high refractive index. It has a rate distribution.
この発明に係わるビニルモノマーとしては，例えばケイ
皮酸，ケイ皮酸エチル，インデンケイ皮酸メチルおよび
メタクリル酸メチルなどが，２官能性ビニルモノマーと
してジビニルベンゼンおよびトリエチレングリコールジ
メタクリル酸メチルなどが適宜組合せて用いられる。Examples of the vinyl monomer according to the present invention include cinnamic acid, ethyl cinnamate, methyl indene cinnamate and methyl methacrylate, and bifunctional vinyl monomers such as divinylbenzene and triethylene glycol dimethacrylate. Used.
この発明に係わる共重合開始剤としては，例えばベンゾ
イン，ベンゾインエチルエーテル，ベンゾインメチルエ
ーテル，ベンゾフエノン，過酸化ベンゾイルおよびアゾ
ビスブチロニトリルなどが用いられる。Examples of the copolymerization initiator according to the present invention include benzoin, benzoin ethyl ether, benzoin methyl ether, benzophenone, benzoyl peroxide and azobisbutyronitrile.
以下実施例によりこの発明をより具体的に説明する。The present invention will be described more specifically with reference to the following examples.
実施例１ ケイ皮酸メチル１重量部，トリエチレングリコールジメ
タクリル酸メチル（反応性が一番大きい２官能性ビニル
モノマー）４重量部およびベンゾイレエチルエーテル0.
5重量部を内径3mmφのガラス管に満たし，１Hzで回転し
ながら超高圧水銀灯光を照射し，固化後ガラス管を割つ
てこの発明の一実施例による光集束性プラスチツクを取
り出す。このもののＡは2.5×１０-2mm-2であり，引張
り強度は10kg/mm2以上であつた。Example 1 1 part by weight of methyl cinnamate, 4 parts by weight of methyl triethylene glycol dimethacrylate (a bifunctional vinyl monomer having the highest reactivity) and benzoyl ethyl ether.
5 parts by weight is filled in a glass tube having an inner diameter of 3 mmφ, irradiated with ultrahigh pressure mercury lamp light while rotating at 1 Hz, and after solidification, the glass tube is broken to take out the light-focusing plastic according to one embodiment of the present invention. This product had an A of 2.5 × 10 -2 mm -2 and a tensile strength of 10 kg / mm 2 or more.
比較例 実施例１におけるトリエチレングリコールジメタクリル
酸メチルの代りにメタクリル酸メチルを用いる以外は実
施例１と同様にして光集束性プラスチツクを製造した。
Ａは1.1×10-2mm-2引張り強度は1kg／mm2以下であつ
た。Comparative Example A light-focusing plastic was manufactured in the same manner as in Example 1 except that methyl methacrylate was used instead of triethylene glycol dimethacrylate in Example 1.
A had 1.1 × 10 -2 mm -2 tensile strength of 1 kg / mm 2 or less.
この発明は以上説明したとおり，屈折率および反応性比
の異なる２種以上のビニルモノマーの内で、反応性が一
番大きいビニルモノマーが２官能性のもの並びに光重合
開始剤を含有するものを容器に入れて光照射して上記ビ
ニルモノマーを光重合することにより，機械的強度が向
上し，屈折率分布定数（Ａ）が増大し、製造時間の短縮
された光集束性プラスチツクの製造方法を得ることがで
きる。As described above, according to the present invention, of the two or more kinds of vinyl monomers having different refractive indexes and reactivity ratios, the vinyl monomer having the highest reactivity is a bifunctional one and the one containing a photopolymerization initiator. A method for producing a light-focusing plastic in which the mechanical strength is improved, the refractive index distribution constant (A) is increased, and the production time is shortened by putting the vinyl monomer in a container and irradiating it with light to photopolymerize the vinyl monomer. Obtainable.
Claims (1)
ビニルモノマー並びに光重合開始剤を含有するものを容
器に入れて光照射して上記ビニルモノマーを光重合する
ものにおいて、上記ビニルモノマーの内で、反応性が一
番大きいビニルモノマーが２官能性ビニルモノマーであ
る光集束性プラスチックの製造方法。1. A vinyl monomer in which two or more kinds of vinyl monomers having different refractive indexes and reactivity ratios and those containing a photopolymerization initiator are placed in a container and irradiated with light to photopolymerize the vinyl monomer. Among them, the method for producing a light-focusing plastic in which the vinyl monomer having the highest reactivity is a bifunctional vinyl monomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60165323A JPH0638125B2 (en) | 1985-07-26 | 1985-07-26 | Method for producing light-focusing plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60165323A JPH0638125B2 (en) | 1985-07-26 | 1985-07-26 | Method for producing light-focusing plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6225705A JPS6225705A (en) | 1987-02-03 |
| JPH0638125B2 true JPH0638125B2 (en) | 1994-05-18 |
Family
ID=15810143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60165323A Expired - Lifetime JPH0638125B2 (en) | 1985-07-26 | 1985-07-26 | Method for producing light-focusing plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638125B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273869C (en) | 2000-08-29 | 2006-09-06 | 捷时雅株式会社 | Composition having refractive index sensitively changealbe by radiation and method for forming refractive index pattern |
| AU2258302A (en) | 2000-12-11 | 2002-06-24 | Jsr Corp | Radiation-sensitive composition changing in refractive index and method of changing refractive index |
| WO2002066561A1 (en) | 2001-02-19 | 2002-08-29 | Jsr Corporation | Radiation-sensitive composition capable of having refractive index distribution |
| RU2275401C2 (en) | 2001-03-13 | 2006-04-27 | Джей Эс Эр КОРПОРЕЙШН | Radiation sensitive compositions varying refractory index and use thereof |
| JP2003185820A (en) | 2001-12-21 | 2003-07-03 | Jsr Corp | Radiation-sensitive refractive index changing composition and refractive index changing method |
| JP4217886B2 (en) | 2003-06-25 | 2009-02-04 | Ｊｓｒ株式会社 | Radiation sensitive refractive index changing composition, pattern forming method and optical material |
| JP2005037668A (en) | 2003-07-14 | 2005-02-10 | Jsr Corp | Pattern forming method and optical element |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430301A (en) * | 1977-08-10 | 1979-03-06 | Hitachi Ltd | Drum level reduction preventive device of natural circulation boiler |
| JPS6030796B2 (en) * | 1980-07-29 | 1985-07-18 | 花王株式会社 | darkening agent |
-
1985
- 1985-07-26 JP JP60165323A patent/JPH0638125B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6225705A (en) | 1987-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3026680B2 (en) | Copolymer having photopolymerizable group, composition containing the copolymer, and method for forming cladding of optical fiber using the composition | |
| CA1086898A (en) | Hydrophilic gel polymer | |
| EP0496893B1 (en) | Method of manufacturing optical transmission medium from synthetic resin | |
| JPH0638125B2 (en) | Method for producing light-focusing plastic | |
| US4419463A (en) | Preparation of cross-linked hydrogel copolymers for contact lenses | |
| JP2003137938A (en) | Curable composition having excellent optical characteristic | |
| US5382448A (en) | Method of manufacturing optical transmission medium from synthetic resin | |
| EP0497984B1 (en) | Method of manufacturing optical transmission medium from synthetic resin | |
| JPS63307844A (en) | Adamantyl diacrylate or dimethacrylate derivative and polymer comprising said derivative as polymer component | |
| EP0454845B1 (en) | Photo-setting resin composition and plastic-clad optical fibers produced therefrom | |
| EP0108420A2 (en) | Image-transmitting synthetic resin rod and process for producing the same | |
| US5177167A (en) | Oxygen-permeable shaped articles and process for producing same | |
| JPH0791262B2 (en) | Novel sulfur-containing aliphatic (meth) acrylate | |
| JP2782742B2 (en) | Cladding material for optical fiber | |
| JPS54137031A (en) | Vinyl polymer emulsion for adhesives | |
| JPH01156306A (en) | Novel transparent resin and transparent optical resin having high refractive index | |
| EP0299565A2 (en) | Optical products made from a thermosetting copolymer having an index of refraction nD20 - 1,52 | |
| JPH0617922B2 (en) | Method for manufacturing synthetic resin optical transmitter | |
| JPS62208005A (en) | Optical fiber | |
| JPH0646243B2 (en) | Method for manufacturing plastic optical transmission body | |
| JP2844631B2 (en) | Optical resin | |
| JP3156260B2 (en) | Core material for optical fiber | |
| JPH05178980A (en) | Fluorine-containing polyether di (meth) acrylate and photocurable composition | |
| JPH0652323B2 (en) | Method for manufacturing synthetic resin ball lens | |
| JPH0614127B2 (en) | Method for manufacturing plastic optical transmission body |