JPH02261834A - Water-absorptive resin composition - Google Patents
Water-absorptive resin compositionInfo
- Publication number
- JPH02261834A JPH02261834A JP1082084A JP8208489A JPH02261834A JP H02261834 A JPH02261834 A JP H02261834A JP 1082084 A JP1082084 A JP 1082084A JP 8208489 A JP8208489 A JP 8208489A JP H02261834 A JPH02261834 A JP H02261834A
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing
- component
- resin composition
- parts
- 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.)
- Granted
Links
- 239000011342 resin composition Substances 0.000 title claims description 26
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000004088 foaming agent Substances 0.000 claims abstract description 6
- 239000002250 absorbent Substances 0.000 claims description 11
- 230000002745 absorbent Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 52
- 238000010521 absorption reaction Methods 0.000 abstract description 17
- 230000008961 swelling Effects 0.000 abstract description 15
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 abstract description 6
- 229920002943 EPDM rubber Polymers 0.000 abstract description 4
- 239000002202 Polyethylene glycol Substances 0.000 abstract description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 abstract description 4
- 235000019399 azodicarbonamide Nutrition 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 229920001223 polyethylene glycol Polymers 0.000 abstract description 4
- 230000002522 swelling effect Effects 0.000 abstract description 4
- 238000004073 vulcanization Methods 0.000 abstract description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 abstract description 3
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 238000004132 cross linking Methods 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 239000000049 pigment Substances 0.000 abstract description 2
- 239000004156 Azodicarbonamide Substances 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 26
- 239000013307 optical fiber Substances 0.000 description 18
- 238000007654 immersion Methods 0.000 description 13
- 238000005187 foaming Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000654 additive Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 239000004604 Blowing Agent Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- UOYIYWCAYFTQLH-UHFFFAOYSA-N 3,7-dinitro-1,3,5,7-tetrazabicyclo[3.3.1]nonane Chemical compound C1N2CN([N+](=O)[O-])CN1CN([N+]([O-])=O)C2 UOYIYWCAYFTQLH-UHFFFAOYSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- VJRITMATACIYAF-UHFFFAOYSA-N benzenesulfonohydrazide Chemical compound NNS(=O)(=O)C1=CC=CC=C1 VJRITMATACIYAF-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- -1 polyoxyethylene chain Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、光フアイバーケーブルの接続部を被覆する
クロージヤー内の浸水を検出する浸水センサー等に用い
られる吸水性樹脂組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water-absorbing resin composition used in a water immersion sensor, etc. that detects water intrusion in a closure that covers a connecting portion of an optical fiber cable.
一般に吸水性樹脂組成物は、天然ゴム、合成ゴム、熱可
塑性エラストマーなどのゴム状物質に、澱粉−ポリアク
リル酸ナトリウムグラフト化物。Generally, a water absorbent resin composition is a starch-sodium polyacrylate grafted product on a rubbery substance such as natural rubber, synthetic rubber, or thermoplastic elastomer.
セルロース−ポリアクリル酸ナトリウム等の高吸水性樹
脂を充填剤などの添加物とともに、配合することによっ
て構成されており、水を吸水して膨張する性質を有して
いるため、管路等の止水剤として使用されている。It is made by blending super absorbent resin such as cellulose-sodium polyacrylate with additives such as fillers, and has the property of absorbing water and expanding, so it can be used as a stopper for pipes, etc. It is used as a water agent.
〔発明が解決しようとする問題点］
しかしながら、この種の吸水性樹脂組成物は、吸水膨張
速度が遅く、また、吸水膨脂倍率も低く、この改善が大
きな問題となっている。とくに最近では、吸水性樹脂組
成物の吸水時の膨潤性を利用し、光フアイバーケーブル
の接合部を被覆するクロージヤー内の浸水を早期に検出
する浸水センサーの吸水膨張材として利用することが提
案され注目されている。すなわち光フアイバーケーブル
の接合は、第４図に示すように、接合すべき光フアイバ
ーケーブル１の端部からそれぞれ光フアイバー心線２を
引き出して接続しその外周をテープ３で被覆し、これら
全体を水密性円筒状クロージヤー４に収容することによ
り行われている。５はテンションメンバーである。そし
て、光通信に利用されない最下段の光フアイバー心線１
の接続部に、浸水センサー６が取り付けられ、クロージ
ヤー４内に対する浸水の検出を行うようになっている。[Problems to be Solved by the Invention] However, this type of water-absorbing resin composition has a slow water-absorbing expansion rate and a low water-absorbing fat swelling ratio, which poses a major problem for improvement. In particular, recently, it has been proposed to utilize the swelling properties of water-absorbing resin compositions when they absorb water to use them as water-absorbing and expanding materials for water-absorbing sensors that detect water intrusion early in closures that cover the joints of optical fiber cables. Attention has been paid. That is, in joining optical fiber cables, as shown in FIG. 4, the optical fiber cores 2 are pulled out from the ends of the optical fiber cables 1 to be joined and connected, and the outer periphery is covered with a tape 3, and the whole is connected. This is done by housing it in a watertight cylindrical closure 4. 5 is a tension member. And the lowest optical fiber core 1 which is not used for optical communication.
A water intrusion sensor 6 is attached to the connection part of the closure 4 to detect water intrusion into the closure 4.
この浸水センサー６は、第５図に示すように、底面透孔
付きの箱形のケーシング７と、この中に入れられ矢印Ａ
で示す光フアイバー心線１を挟んで対峙する一対の吸水
膨張材８とで構成されている。すなわち、上記一対の吸
水膨張材８は、吸水性樹脂組成物からなっており、クロ
ージヤー４内に浸水した時に、ケーシング７の底面透孔
から内部に入った水を吸水して膨張し、それによって、
光フアイバー心線ｌを鎖線Ａで示す直線状態から鎖線Ｂ
で示すように屈曲させる。これによって光の伝送損失が
大きくなるため、これを検出することによってクロージ
ヤー４内に対する浸水を検出することが可能になる。こ
のような光フアイバーケーブル１の接続部における浸水
センサー６の吸水膨張材８に対しては、クロージヤー４
内に対する浸水を迅速かつ正確に検出するという見地か
ら吸水膨脹速度が速く、かつ吸水膨脹倍率も高く、その
うえ一部が水と接触しても全体が均一に膨潤するという
ことが求められている。より詳しく述べると、上記浸水
センサー６用の吸水膨張材８に対しては、第６図に示す
ように、水９と接触した部分８ａだけが部分的に膨潤す
るのではなく、一部分が水と接触しても全体が膨潤する
という特性が強く求められる。さらに、光フアイバー心
線１に対して永久歪みを生じさせないような強さで屈曲
させる必要があり、その屈曲度合は心線１によって差が
あるため、膨脹倍率の制御が可能ということも大きな要
素となる。しかしながら、従来の吸水性樹脂組成物では
、このような特性を充分備え、しかも吸水膨脹速度９倍
率も良好なものがないのが実情である。As shown in FIG. 5, this water immersion sensor 6 consists of a box-shaped casing 7 with a through hole at the bottom, and a box-shaped casing 7 placed inside the box-shaped casing 7 shown by the arrow A.
It is composed of a pair of water-absorbing and expanding materials 8 facing each other with the optical fiber core 1 in between. That is, the pair of water-absorbing and expanding materials 8 are made of a water-absorbing resin composition, and when water enters the closure 4, they absorb water that enters the interior through the bottom hole of the casing 7 and expand. ,
From the straight line state where the optical fiber core line l is shown by the chain line A, to the chain line B
Bend it as shown. This increases the transmission loss of light, and by detecting this, it becomes possible to detect water intrusion into the closure 4. For the water-absorbing and expanding material 8 of the water immersion sensor 6 at the connection part of the optical fiber cable 1, the closure 4
From the standpoint of quickly and accurately detecting water intrusion into the interior, it is required that the water absorption expansion rate is high, the water absorption expansion ratio is high, and the entire body swells uniformly even if a portion comes into contact with water. To explain in more detail, as shown in FIG. 6, the water-absorbing and expanding material 8 for the water immersion sensor 6 does not swell only in the portion 8a that comes into contact with the water 9, but partially in contact with the water. There is a strong demand for the property that the entire body swells even when it comes into contact with it. Furthermore, it is necessary to bend the optical fiber core 1 with a strength that does not cause permanent distortion, and the degree of bending varies depending on the core wire 1, so being able to control the expansion magnification is also an important factor. becomes. However, the reality is that there is no conventional water-absorbing resin composition that sufficiently has such properties and also has a good water absorption expansion rate of 9 times.
この発明は、このような事情に塔みなされたもので、吸
水膨脹速度が速くて吸水膨脹倍率も高く、かつ一部が水
と接触しても全体が膨潤し、しかも膨脹倍率の制御が可
能な吸水性樹脂組成物の提供をその目的とする。This invention was developed in light of these circumstances; it has a high water absorption expansion rate and a high water absorption expansion ratio, and even if a part of it comes into contact with water, the entire product swells, and the expansion ratio can be controlled. The purpose of the present invention is to provide a water-absorbing resin composition.
［問題点を解決するための手段〕
上記の目的を達成するため、この発明の吸水性樹脂組成
物は、下記の（Ａ）成分１００重量部に対して、（Ｂ）
成分５０〜５００重量部、（Ｃ）成分５〜５０重量部、
（Ｄ）成分５〜５０重量部の割合で配合されているとい
う構成をとる。[Means for Solving the Problems] In order to achieve the above object, the water absorbent resin composition of the present invention contains (B) for 100 parts by weight of the following component (A).
50 to 500 parts by weight of component, 5 to 50 parts by weight of component (C),
Component (D) is blended in a proportion of 5 to 50 parts by weight.
（Ａ）ゴム状物質。(A) Rubbery substance.
（Ｂ）高吸水性樹脂。(B) Super absorbent resin.
（Ｃ，）ｅａ水性樹脂。(C,)ea aqueous resin.
（Ｄ）発泡剤。(D) Foaming agent.
すなわち、この発明者らは、吸水性樹脂組成物、特に光
フアイバーケーブルの接続部の浸水センサー用の吸水膨
張材になしうる吸水性樹脂組成物の開発を目的とし、組
成物の基材となるゴム状物質に配合する添加剤を中心に
研究を進めた。その結果、上記ゴム状物質に対して、高
吸水性樹脂を配合するだけではなく、それ以外に、ポリ
エチレングリコールのような親水性樹脂を配合し、さら
にアゾジカルボアミドのような発泡剤を配合すると、良
好な成績が得られることを見出した。そして、これを中
心にさらに研究を進めた結果、上記４種類の化合物を特
定の割合で配合すると、光フアイバーケーブルの浸水セ
ンサーに用いられる吸水膨張材用吸水性樹脂組成物とし
て要求される４種類の特性をすべて備えた吸水性樹脂組
成物が得られることを見出し、この発明に到達した。That is, the present inventors aimed to develop a water-absorbing resin composition, particularly a water-absorbing resin composition that can be used as a water-absorbing and expanding material for a water-absorbing sensor for a connection part of an optical fiber cable. Research focused on additives to be added to rubber-like substances. As a result, in addition to blending a highly water-absorbent resin into the rubber-like material, we also blended a hydrophilic resin such as polyethylene glycol and a blowing agent such as azodicarboxamide. They found that good results could be obtained. As a result of further research focusing on this, we found that when the above four types of compounds are blended in a specific ratio, four types of water absorbent resin compositions are required for water absorbing and expanding materials used in optical fiber cable immersion sensors. The inventors have discovered that a water-absorbing resin composition having all of the above characteristics can be obtained, and have arrived at the present invention.
この発明の吸水性樹脂組成物は、ゴム状物質（Ａ成分）
と高吸水性樹脂（Ｂ成分）と親水性樹脂（Ｃ）成分と発
泡剤（Ｄ成分）とを用いて得られる。The water-absorbing resin composition of this invention has a rubbery substance (component A).
It is obtained using a super absorbent resin (component B), a hydrophilic resin (component C), and a foaming agent (component D).
上記（Ａ）成分のゴム状物質としては、エチレンプロピ
レンジエンゴム（ＥＰＤＭ）クロロブレンゴム（ＣＲ）
、スチレン−ブタジェン共重合体（ＳＢＲ）、ブチルゴ
ム（ＩＩＲ）、天然ゴム等があげられる。この発明の吸
水性樹脂組成物は、吸水膨張材等として使用される時に
は、加熱加硫されて発泡状態になり、その状態で冷却さ
れ使用に供される。したがって、上記（Ａ）成分のゴム
状物質は、発泡に適応できるように、可塑剤等の油剤等
により適度に粘度調節して用いられる。上記例示したゴ
ム状物質のなかでも、ＥＰＤＭを使用すると、より好結
果が得られるようになる。As the rubbery substance of the above component (A), ethylene propylene diene rubber (EPDM), chloroprene rubber (CR)
, styrene-butadiene copolymer (SBR), butyl rubber (IIR), natural rubber, and the like. When the water-absorbing resin composition of the present invention is used as a water-absorbing and expanding material, it is heated and vulcanized into a foamed state, and then cooled in that state for use. Therefore, the rubbery substance of component (A) is used after adjusting its viscosity appropriately with an oil agent such as a plasticizer so that it can be adapted to foaming. Among the rubber-like substances exemplified above, better results can be obtained by using EPDM.
（Ｂ）成分の高吸水性樹脂としては、架橋ポリアクリル
酸ナトリウム、架橋ポリエチレンオキシド、架橋カルボ
キシメチルセルロースナトリウム塩、澱粉−ポリアクリ
ル酸ナトリウムグラフト化物、澱粉−ポリアクリロニト
リルグラフト化物の添加物、セルロース−ポリアクリル
酸ナトリウムビニルアルコール−（メタ）アクリル酸ナ
トリウム−（メタ）アクリル酸共重合体、架橋ポリ（メ
タ）アクリル酸ナトリウム、架橋イソブチレン無水マレ
イン酸共重合体のアルカリ中和物ポリオキシエチレン鎖
含有ポリウレタン等があげられる。これら高吸水性樹脂
の中でも、架橋ポリアクリル酸ナトリウムを使用するこ
とが好適である。Component (B) superabsorbent resins include crosslinked sodium polyacrylate, crosslinked polyethylene oxide, crosslinked carboxymethyl cellulose sodium salt, starch-sodium polyacrylate grafted product, starch-polyacrylonitrile grafted additive, cellulose-polyacrylate Sodium acrylate vinyl alcohol-sodium (meth)acrylate-(meth)acrylic acid copolymer, crosslinked sodium poly(meth)acrylate, alkali neutralized product of crosslinked isobutylene maleic anhydride copolymer polyoxyethylene chain-containing polyurethane etc. can be mentioned. Among these super absorbent resins, crosslinked sodium polyacrylate is preferably used.
上記（Ａ）成分、（Ｂ）成分とともに用いられる（Ｃ）
成分の親水性樹脂は、特に制限するものではなく、ポリ
エチレングリコール、ポリプロピレングリコール、ポリ
ビニルアルコール等の水に対する溶解性を有する高分子
化合物が用いられる。これらの中でも、ポリエチレング
リコール、ポリプロピレングリコール等を用いることが
好適であり、特に分子量が１０００〜１００００の範囲
内のものを用いることが好ましい。(C) used with the above (A) component and (B) component
The component hydrophilic resin is not particularly limited, and polymer compounds having water solubility such as polyethylene glycol, polypropylene glycol, and polyvinyl alcohol are used. Among these, it is preferable to use polyethylene glycol, polypropylene glycol, etc., and it is particularly preferable to use those having a molecular weight in the range of 1,000 to 10,000.
（Ｄ）成分の発泡剤も特に限定するものではなく、アゾ
ジカルボアミド、ジニトロペンタメチレンテトラミン、
ｐ、ｐ′−ビス（ベンゼンスルホニルヒドラジド）エー
テル、ｐ、ｐ′−トルエンスルホニルヒドラジド、アブ
ビスブチロニトリルないしはこれらの誘導体があげられ
る。これらの中でも、アゾジカルボアミドを用いること
が好結果をもたらす。The blowing agent of component (D) is also not particularly limited, and includes azodicarboxamide, dinitropentamethylenetetramine,
Examples include p,p'-bis(benzenesulfonylhydrazide) ether, p,p'-toluenesulfonylhydrazide, abisbutyronitrile, and derivatives thereof. Among these, the use of azodicarboxamide gives good results.
上記（Ｂ）〜（Ｄ）成分は、それぞれ（Ａ）成分に対し
て、下記の割合で配合されていることが重要である。す
なわち、上記（Ａ）成分１００重量部（以下「部」と略
す）に対して（Ｂ）成分が５０〜５００部、（Ｃ）成分
が５〜５０部、 （Ｄ）成分が５〜５０部の割合で配
合されていることが必要であり、これらの範囲を外れる
と得られる吸水性樹脂組性物は、先に述べた４種類の特
性のいずれかが欠けたものとなるからである。特に上記
（Ｂ）〜（Ｄ）成分の（Ａ）成分に対する好適な割合は
、（Ａ）成分１００部に対して（Ｂ）成分が１００〜３
００部、（Ｃ）成分が１０〜２０部、（Ｄ）成分が１０
〜２０部である。また、上記のような（Ａ）〜（Ｄ）成
分の配合割合以外に、Ｂ成分の高吸水性樹脂の粒径も吸
水性に大きな影響を与える。好適なのは粒径が５〜２０
０ミクロンの微粒子であり、より好適には１０〜１００
ミクロンのものである。すなわち、粒径が上記範囲を下
まわると吸水膨脹材にしたときに全体が均一に膨潤せず
水と接触した部分だけが膨潤する傾向がみられ、逆に上
まわると、練り込みにくくなるうえ、比表面積が小さく
なりすぎ膨潤に時間がかかりすぎる傾向がみられるか、
らである。It is important that the above components (B) to (D) are respectively blended with respect to component (A) in the following proportions. That is, for 100 parts by weight of component (A) (hereinafter abbreviated as "parts"), component (B) is 50 to 500 parts, component (C) is 5 to 50 parts, and component (D) is 5 to 50 parts. It is necessary that the water-absorbing resin composition be blended in a ratio of 1 to 1, and if the ratio is outside these ranges, the resulting water-absorbent resin composition will lack any of the above-mentioned four types of properties. In particular, a preferred ratio of components (B) to (D) to component (A) is 100 to 3 parts of component (B) to 100 parts of component (A).
00 parts, 10 to 20 parts of component (C), 10 parts of component (D)
~20 copies. In addition to the blending ratios of components (A) to (D) as described above, the particle size of the super absorbent resin as component B also has a large effect on water absorbency. The preferred particle size is 5 to 20.
Fine particles of 0 microns, more preferably 10 to 100 microns.
It is micron. In other words, if the particle size is below the above range, when it is made into a water-absorbing expandable material, the entire part will not swell uniformly and only the part that comes into contact with water will tend to swell, while if it exceeds the above range, it will be difficult to knead and , Is there a tendency for the specific surface area to become too small and take too much time to swell?
It is et al.
なお、この発明の吸水性樹脂組成物は、加硫によって発
泡し、発泡状の吸水膨脹材となるのであることから、（
Ａ）〜（Ｄ）成分に加え、加硫用の硫黄、酸化マグネシ
ウム、亜鉛華等の公知の加硫剤が配合され、必要に応じ
て架橋促進剤も配合される。また、上記加硫剤以外に、
従来公知のゴム用添加剤、例えばカーボンブラック、各
種着色顔料、紫外線吸収剤、酸化防止剤、ワックス等を
任意に配合することができる。In addition, since the water-absorbing resin composition of the present invention foams upon vulcanization and becomes a foam-like water-absorbing and expanding material, (
In addition to components A) to (D), known vulcanizing agents such as sulfur, magnesium oxide, and zinc white are blended for vulcanization, and if necessary, a crosslinking accelerator is also blended. In addition to the above vulcanizing agents,
Conventionally known rubber additives such as carbon black, various coloring pigments, ultraviolet absorbers, antioxidants, waxes, etc. can be optionally blended.
この発明の吸水性樹脂組成物を用い、例えば光フアイバ
ーケーブルの接続部の浸水センサーに用いられる吸水膨
脹材を製造する場合は、つぎのようにして行われる。す
なわち、上記原料を所定の割合で配合し、ロールやバン
バリーミキサ−等を用いて混練して均質化し、ついでこ
れを押し出し成形、プレス成形、カレンダー成形等によ
り所望の形状に成形し、ついで得られた成形物を加熱装
置を用い加熱する。この加熱の際、上記成形体が発泡剤
の作用によって発泡すると同時に、架橋剤の作用により
ゴム成分が架橋して吸水膨脹材が得られる。特に、この
発明の吸水性樹脂組成物は、第３図に示すように、加熱
容器１０内に入れて加硫する際、加熱容器の空間（発泡
空間となる）の大きさを変えて発泡倍率を制御すること
により膨脹倍率を制御できる。すなわち、この発明の吸
水性樹脂組成物は、発泡倍率と膨脹倍率とが比例してお
り、発泡倍率を上記のように制御することによって膨脹
倍率をも制御できるのであり、これが大きな特徴である
。この場合、発泡倍率は、１．５〜１０倍の範囲内であ
れば、膨脹倍率もそれに比例して変わるのであり、より
正確に比例するのは１．５〜６倍の範囲内である。When the water-absorbing resin composition of the present invention is used to produce, for example, a water-absorbing expandable material for use in a water immersion sensor for connecting portions of optical fiber cables, it is carried out as follows. That is, the above raw materials are mixed in a predetermined ratio, kneaded and homogenized using rolls, a Banbury mixer, etc., and then formed into a desired shape by extrusion molding, press molding, calendar molding, etc. The molded product is heated using a heating device. During this heating, the molded body is foamed by the action of the foaming agent, and at the same time, the rubber component is crosslinked by the action of the crosslinking agent to obtain a water-absorbing and expanding material. In particular, as shown in FIG. 3, when the water-absorbing resin composition of the present invention is placed in a heating container 10 and vulcanized, the foaming ratio is increased by changing the size of the space in the heating container (which becomes the foaming space). The expansion magnification can be controlled by controlling . That is, in the water-absorbing resin composition of the present invention, the foaming ratio and the expansion ratio are proportional, and by controlling the foaming ratio as described above, the expansion ratio can also be controlled, which is a major feature. In this case, if the foaming ratio is within the range of 1.5 to 10 times, the expansion ratio will also change proportionally, and the more accurate ratio is within the range of 1.5 to 6 times.
このようにして得られた吸水腫脹材は、吸水膨脹速度が
速くて、吸水膨脹倍率が高く、しかも−部が水に接触し
ても全体が膨潤し、また、発泡倍率の制御により膨脹倍
率が制御可能になっており、光フアイバーケーブルの接
続部の浸水センサーの吸水腫脹材として必要な４種類の
特性のすべてを備えている。したがって、第１図および
第２図に示すように、これを所定形状に形成して１組の
吸水腫脹材２６とし、これを底面透孔付きのプラスチッ
ク製ケーシング２０に入れて金属板２４゜２５を装着し
、その金属板２４．２５の間に鎖線Ａで示すように光フ
アイバー心線を通すことにより高精度の浸水センサー６
を形成することができる。２２はケーシングの蓋材であ
る。The water-absorbing swelling material obtained in this way has a high water-absorbing expansion rate and a high water-absorbing expansion ratio.Moreover, even if the negative part comes into contact with water, the entire part swells, and the expansion ratio can be adjusted by controlling the foaming ratio. It is controllable and has all four types of properties required as a water absorption swelling material for a water immersion sensor at the connection part of an optical fiber cable. Therefore, as shown in FIGS. 1 and 2, this is formed into a predetermined shape to form a set of water-absorbing swelling materials 26, and this is placed in a plastic casing 20 with a through-hole at the bottom and placed in a metal plate 24, 25. A high-precision water immersion sensor 6 is installed by attaching the immersion sensor 6 and passing an optical fiber core between the metal plates 24 and 25 as shown by the chain line A.
can be formed. 22 is a lid material for the casing.
なお、この発明の吸水性樹脂組成物は、上記のような光
フアイバーケーブルの浸水センサーに用いられる吸水腫
脹材だけでなく、管路の止水剤や玩具の分野にも応用可
能である。The water-absorbing resin composition of the present invention can be applied not only to the water-absorbing swelling material used in the above-described water immersion sensor for optical fiber cables, but also to the fields of water-stopping agents for pipes and toys.
以上のように、この発明の吸水性樹脂組成物は、前記（
Ａ）〜（Ｄ）成分を組み合わせ、かつそれら相互の割合
を特定割合にしているため、それを加硫と同時に発泡さ
せて得られる吸水腫脹材は、吸水膨脹速度が速くて吸水
膨脹倍率が高く、しかも一部が水と接触しても全体が膨
潤し、さらに発泡倍率を任意に制御しうるという優れた
特性を有している。したがって、光フアイバーケーブル
の接触部の浸水センサーに用いられる吸水腫脹材として
最適である。As mentioned above, the water-absorbing resin composition of the present invention has the above-mentioned (
Since the components A) to (D) are combined and their mutual ratio is set to a specific ratio, the water-absorbing swelling material obtained by foaming them at the same time as vulcanization has a fast water-absorbing expansion rate and a high water-absorbing expansion ratio. Furthermore, it has excellent properties in that even if a part of it comes into contact with water, the whole part swells, and furthermore, the expansion ratio can be controlled arbitrarily. Therefore, it is most suitable as a water-absorbing swelling material for use in water immersion sensors for contact parts of optical fiber cables.
つぎに、実施例について比較例と合わせて説明する。Next, examples will be described together with comparative examples.
（Ａ）〜（Ｄ）成分として、後記の第１表に示す化合物
を準備し、これらを同表に示す割合で配合しロールで混
練したのち厚板状に押し出し成形した。つぎに、これを
加熱容器内に入れ、１０°Ｃ以上で５分間以上加熱加硫
し、全体の発泡および架橋を行って吸水腫脹材をつくっ
た。このようにして得られた吸水腫脹材に対して吸水膨
脹速度。Compounds shown in Table 1 below were prepared as components (A) to (D), and these were blended in the proportions shown in the same table, kneaded with rolls, and then extruded into a thick plate. Next, this was placed in a heating container and heated and vulcanized at 10° C. or higher for 5 minutes or more to foam and crosslink the entire product, thereby producing a water-absorbing swelling material. The water absorption and expansion rate of the water absorption and swelling material thus obtained.
全体均一膨潤性、吸水膨脹倍率および発泡倍率で示され
る、発泡倍率の制御による膨脹倍率の制御性を調べ、同
表に併せて示した。The controllability of the expansion ratio by controlling the expansion ratio, as shown by the overall uniform swelling property, the water absorption expansion ratio, and the foaming ratio, was investigated and is also shown in the same table.
（以下余白） なお、上記試験は次のように行った。(Margin below) The above test was conducted as follows.
吸水膨脂速度：吸水倍率５倍（検知倍率）に達する時間
（分）
全体均一膨潤性：３０分間吸水後の膨潤性吸水膨張倍率
：３０分間吸水後の体積変化率（ｃｆｆｌ／ｃｄ ）
上記の表において、（Ａ）成分１００部に対して（Ｂ）
成分が５０〜５００部、（Ｃ）成分が５〜５０部、（Ｄ
）成分が５〜５０部の範囲内であれば、吸水膨脹材に求
められる４種類の特性がすべて良好であることがわかる
。また、実施例と従来例との対比から明らかなように、
実施例から得られた吸水膨脹材は、従来例から得られた
ものよりも吸水膨張速度、吸水倍率が優れ、しかも全体
均一膨潤性等にも優れていることが分かる。Water absorption swelling rate: Time to reach 5x water absorption (detection magnification) (minutes) Overall uniform swelling: Swelling after 30 minutes of water absorption Water absorption expansion rate: Volume change rate after 30 minutes of water absorption (cffl/cd) In the table, (B) for 100 parts of component (A)
50 to 500 parts of component, 5 to 50 parts of component (C), (D
) It can be seen that all four types of properties required for a water-absorbing and expanding material are good if the amount of the component is within the range of 5 to 50 parts. Furthermore, as is clear from the comparison between the example and the conventional example,
It can be seen that the water-absorbing and swelling materials obtained from the examples have better water-absorbing expansion speed and water absorption capacity than those obtained from the conventional examples, and are also superior in overall uniform swelling properties.
第１図はこの発明の吸水性樹脂組成物からなる吸水膨脹
材を用いた浸水センサー具の分解斜視図、第２図はその
平面図、第３図はこの発明の吸水性樹脂組成物を加熱発
泡させる場合の説明図、第４図は光フアイバーケーブル
の接続部のクロージヤーの断面図、第５図はそれに用い
られている浸水センサー具の斜視図、第６図は従来の吸
水膨脹材の膨潤状態を示す説明図である。
特許出願人 東海ゴム工業株式会社Fig. 1 is an exploded perspective view of a water immersion sensor device using a water-absorbing expandable material made of the water-absorbing resin composition of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is a heating of the water-absorbing resin composition of the present invention. An explanatory diagram of foaming, Fig. 4 is a cross-sectional view of the closure of the connection part of the optical fiber cable, Fig. 5 is a perspective view of the water immersion sensor used therein, and Fig. 6 is the swelling of a conventional water-absorbing and expanding material. It is an explanatory diagram showing a state. Patent applicant: Tokai Rubber Industries Co., Ltd.
Claims (1)
成分５０〜５００重量部、（Ｃ）成分５〜５０重量部、
（Ｄ）成分５〜５０重量部の割合で配合されてなる吸水
性樹脂組成物。 （Ａ）ゴム状物質。 （Ｂ）高吸水性樹脂。 （Ｃ）親水性樹脂。 （Ｄ）発泡剤。(1) For 100 parts by weight of component (A) below, (B)
50 to 500 parts by weight of component, 5 to 50 parts by weight of component (C),
A water-absorbing resin composition containing component (D) in a proportion of 5 to 50 parts by weight. (A) Rubbery substance. (B) Super absorbent resin. (C) Hydrophilic resin. (D) Foaming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082084A JPH02261834A (en) | 1989-03-31 | 1989-03-31 | Water-absorptive resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082084A JPH02261834A (en) | 1989-03-31 | 1989-03-31 | Water-absorptive resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02261834A true JPH02261834A (en) | 1990-10-24 |
| JPH0548775B2 JPH0548775B2 (en) | 1993-07-22 |
Family
ID=13764580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1082084A Granted JPH02261834A (en) | 1989-03-31 | 1989-03-31 | Water-absorptive resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02261834A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146312A (en) * | 1991-11-29 | 1993-06-15 | Nishikawa Rubber Co Ltd | Production of cell rubber |
| WO2008069013A1 (en) * | 2006-12-05 | 2008-06-12 | Kaneka Corporation | Resin foam suitable as energy absorption material |
| JP2009052009A (en) * | 2007-07-31 | 2009-03-12 | Sanyo Chem Ind Ltd | Method for producing water-absorbing resin |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9481146B2 (en) | 2011-03-09 | 2016-11-01 | Toray Industries, Inc. | Crosslinked polyolefin resin foam |
-
1989
- 1989-03-31 JP JP1082084A patent/JPH02261834A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146312A (en) * | 1991-11-29 | 1993-06-15 | Nishikawa Rubber Co Ltd | Production of cell rubber |
| FR2705100A1 (en) * | 1991-11-29 | 1994-11-18 | Nishikawa Rubber Co Ltd | Process for the manufacture of a cellular rubber, cellular rubber obtained by this process and cosmetics pad consisting thereof |
| WO2008069013A1 (en) * | 2006-12-05 | 2008-06-12 | Kaneka Corporation | Resin foam suitable as energy absorption material |
| JP2009052009A (en) * | 2007-07-31 | 2009-03-12 | Sanyo Chem Ind Ltd | Method for producing water-absorbing resin |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548775B2 (en) | 1993-07-22 |
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