JPH0442635Y2 - - Google Patents
Info
- Publication number
- JPH0442635Y2 JPH0442635Y2 JP1985009183U JP918385U JPH0442635Y2 JP H0442635 Y2 JPH0442635 Y2 JP H0442635Y2 JP 1985009183 U JP1985009183 U JP 1985009183U JP 918385 U JP918385 U JP 918385U JP H0442635 Y2 JPH0442635 Y2 JP H0442635Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- pipe
- group
- swellable
- oxyalkylene
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000000314 lubricant Substances 0.000 claims description 23
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 11
- 229920000570 polyether Polymers 0.000 claims description 11
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 8
- 125000005702 oxyalkylene group Chemical group 0.000 claims description 8
- 125000006353 oxyethylene group Chemical group 0.000 claims description 7
- 229920001228 polyisocyanate Polymers 0.000 claims description 7
- 239000005056 polyisocyanate Substances 0.000 claims description 7
- 125000002947 alkylene group Chemical group 0.000 claims description 6
- 229920005862 polyol Polymers 0.000 claims description 6
- 150000003077 polyols Chemical class 0.000 claims description 6
- 150000005846 sugar alcohols Polymers 0.000 claims description 6
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 235000011837 pasties Nutrition 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 150000001298 alcohols Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 4
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 4
- 235000011187 glycerol Nutrition 0.000 description 4
- 229920005749 polyurethane resin Polymers 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- JXCHMDATRWUOAP-UHFFFAOYSA-N diisocyanatomethylbenzene Chemical compound O=C=NC(N=C=O)C1=CC=CC=C1 JXCHMDATRWUOAP-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- HEBKCHPVOIAQTA-QWWZWVQMSA-N D-arabinitol Chemical compound OC[C@@H](O)C(O)[C@H](O)CO HEBKCHPVOIAQTA-QWWZWVQMSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004386 Erythritol Substances 0.000 description 1
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は管継手部の止水構造に、詳しくは、本
管の管壁の一部に枝管の端部を嵌入してそれらを
接合した管継手部の止水構造に関する。[Detailed description of the invention] [Field of industrial application] The present invention is a water-stop structure for pipe joints, specifically, the end of a branch pipe is fitted into a part of the wall of the main pipe to join them. This invention relates to a water-stop structure for pipe joints.
［従来の技術とその問題点］
従来より、ヒユーム管等の管継手部の止水に
は、止水滑材が使用されてきた。このような止水
滑材には、一液型で水と反応して発泡硬化するポ
リウレタン系、タールとウレタンを混合したター
ルウレタン型、二液性のエポキシ系、ゴム溶液系
等がある。[Prior art and its problems] Water-stop lubricants have conventionally been used to stop water at pipe joints such as humid pipes. Examples of such waterproof lubricants include one-component polyurethane types that foam and harden by reacting with water, tar-urethane types that are a mixture of tar and urethane, two-component epoxy types, and rubber solution types.
しかしながら、このような従来の止水滑材は、
低粘度であるため塗布後たれが生じたり、強度が
低いため１mm以上のすきまの止水を行なうことが
できなかつた。 However, such conventional waterproof lubricants,
The low viscosity caused dripping after application, and the low strength made it impossible to seal water in gaps of 1 mm or more.
このため、止水硬化が高く、塗布時にたれの生
じない、しかも強度が大きい止水滑材が要求され
ていた。 For this reason, there has been a demand for a water-stop lubricant that has high water-stop curing properties, does not cause dripping during application, and has high strength.
［問題点を解決するための手段］
本考案はこのような問題点を解決するもので、
水膨潤性樹脂を用いて止水効化を高めるととも
に、上記の要求をも満足させる新規な止水滑材を
使用した、管継手部の止水構造を提供することを
目的とする。[Means for solving the problems] This invention solves these problems,
It is an object of the present invention to provide a water-stopping structure for a pipe joint using a new water-stopping lubricant that uses a water-swellable resin to enhance the waterstopping effect and also satisfies the above requirements.
本考案の管継手部の止水構造は、本管の管壁の
一部に枝管の端部を嵌入してそれらを接合した管
継手部の止水構造において、上記本管と上記枝管
との接合面に、止水滑材として、一般式
Ｒ〔（OR1）oOH〕p
（ここにＲは多価アルコール残基：（OR1）は
オキシエチレン基と炭素数３〜４のアルキレン基
を有するオキシアルキレン基とからなるポリオキ
シアルキレン鎖、但し、オキシエチレン基の割合
は分子量の50〜90％を占める。：ｎはオキシアル
キレン基の重合度を示す数で水酸基当量が50〜
4000となるに相当する数：ｐは２〜８の数）で示
されるポリエーテルポリオールの一種又は二種以
上の混合物とポリイソシアネートとから得た末端
イソシアネート基含量1.5〜10％の水膨潤性ウレ
タンプレポリマー１と、
一般式
R2〔（OR3）nOH〕q
（ここにR2は多価アルコール残基：（OR3）は
炭素数３〜４のアルキレン基を有するオキシアル
キレン鎖、：ｍはオキシアルキレン基の重合度を
示す数で水酸基当量が500〜4000となるに相当す
る数：ｑは２〜８の数）で示されるポリエーテル
ポリオールの一種又は二種以上の混合物とポリイ
ソシアネートとから得た末端イソシアネート基含
有非水膨潤性ウレタンプレポリマー２と、充填剤
３とを、上記成分２100部に対し、上記成分１20
〜100部、上記成分３２〜100部の割合で混合して
なるペースト状湿気硬化型水膨潤性ポリウレタン
未硬化物が塗布されていることを特徴とするもの
である。 The water stop structure of the pipe joint of the present invention is such that the end of the branch pipe is fitted into a part of the pipe wall of the main pipe and the ends of the branch pipe are joined. The general formula R[(OR 1 ) o OH] p (where R is a polyhydric alcohol residue; (OR 1 ) is an oxyethylene group and a carbon number 3-4 A polyoxyalkylene chain consisting of an oxyalkylene group having an alkylene group, provided that the proportion of oxyethylene groups accounts for 50 to 90% of the molecular weight: n is a number indicating the degree of polymerization of the oxyalkylene group, and the hydroxyl equivalent is 50 to 90%.
A water-swellable urethane with a terminal isocyanate group content of 1.5 to 10% obtained from one or a mixture of two or more polyether polyols represented by the number corresponding to 4000 (p is a number from 2 to 8) and a polyisocyanate. Prepolymer 1 and the general formula R 2 [(OR 3 ) n OH] q (where R 2 is a polyhydric alcohol residue: (OR 3 ) is an oxyalkylene chain having an alkylene group having 3 to 4 carbon atoms: m is a number indicating the degree of polymerization of the oxyalkylene group and corresponds to a hydroxyl equivalent of 500 to 4000; q is a number from 2 to 8); or a mixture of two or more polyether polyols and polyisocyanate. Non-water swellable urethane prepolymer 2 containing terminal isocyanate groups obtained from
It is characterized by being coated with an uncured paste-like moisture-curable water-swellable polyurethane product prepared by mixing 100 parts to 100 parts of the above-mentioned components.
上記多価アルコールとしては、例えば二価アル
コール（エチレングリコール、プロピレングリコ
ール等）、三価アルコール（グリセリン、トリメ
チロールプロパン等）、四価アルコール（エリト
ツト、ペンタエリトツト等）、五価アルコール
（アラビツト、キシリツト等）、六価アルコール
（ソルビツト、マンニツト等）等がある。 Examples of the polyhydric alcohols include dihydric alcohols (ethylene glycol, propylene glycol, etc.), trihydric alcohols (glycerin, trimethylolpropane, etc.), tetrahydric alcohols (erythritol, pentaerythritol, etc.), pentahydric alcohols (arabitol, xylitol, etc.). ), hexahydric alcohols (sorbit, mannitol, etc.), etc.
上記ポリエーテルポリオールはかかる多価アル
コールにアルキレンオキサイドを所望の分子量と
なるように付加せしめることにより製造できる。
付加はランダムでもブロツクでもよいがランダム
が好ましい。オキシエチレン基の割合が50％未満
では膨潤性が不十分となり、止水性能が低下する
ので好ましくない。また90％を超えるとイソシア
ネートを反応せしめて得られるイソシアネート基
含有プレポリマーが常温で結晶化するため作業性
が悪化する。 The above polyether polyol can be produced by adding alkylene oxide to the polyhydric alcohol so as to have a desired molecular weight.
The addition may be random or in blocks, but random is preferred. If the proportion of oxyethylene groups is less than 50%, the swelling property will be insufficient and the water-stopping performance will deteriorate, which is not preferable. Moreover, if it exceeds 90%, the isocyanate group-containing prepolymer obtained by reacting isocyanate will crystallize at room temperature, resulting in poor workability.
本考案に用いられるポリイソシアネートとして
は任意のものが使用できる。本考案の水膨潤性ポ
リウレタンプレポリマー１は上記ポリエーテルポ
リオールとポリイソシアネートとを、末端NCO
基含量が1.5−10％、好ましくは1.5−５％となる
ように、常法によつて反応せしめて得ることがで
きる。 Any polyisocyanate can be used in the present invention. The water-swellable polyurethane prepolymer 1 of the present invention combines the above polyether polyol and polyisocyanate with terminal NCO
It can be obtained by reaction in a conventional manner such that the group content is 1.5-10%, preferably 1.5-5%.
本考案の非水膨潤性ポリウレタンプレポリマー
２において、R2としては前述のＲの説明で述べ
た種々のアルコールを同様に挙げることができ
る。かかるアルコールに、炭素数３−４のアルキ
レンオキシド（好ましくはプロピレンオキシド）
を付加せしめてポリイソシアネートを反応せしめ
て、非水膨潤性ポリウレタンプレポリマー２を得
る。 In the non-water swellable polyurethane prepolymer 2 of the present invention, examples of R 2 include the various alcohols mentioned in the explanation of R above. An alkylene oxide having 3 to 4 carbon atoms (preferably propylene oxide) is added to the alcohol.
is added to react the polyisocyanate to obtain a non-water swellable polyurethane prepolymer 2.
本考案の充填剤３としては、例えば、炭酸カル
シウム、パーライト、カーボンブラツク、ガラ
ス、酸化珪素、滑石、ひる石、酸化チタン、水酸
化カルシウム、ケイ灰石等が挙られる。 Examples of the filler 3 of the present invention include calcium carbonate, pearlite, carbon black, glass, silicon oxide, talc, vermiculite, titanium oxide, calcium hydroxide, wollastonite, and the like.
こうして得られるペースト状湿気硬化型水膨潤
性ポリウレタン樹脂は、大気中の湿気によつて硬
化するが、この未硬化物を接合面に塗布すること
によつて、本考案の管継手部の止水構造が得られ
るのである。 The paste-like moisture-curing water-swellable polyurethane resin thus obtained is cured by atmospheric moisture, but by applying this uncured material to the joint surface, the water-tightening of the pipe joint of the present invention can be achieved. This gives us structure.
第１図は本考案の止水構造の一実施例を示す要
部の断面図で、本実施例においては、本管１の管
壁の一部に枝管２の端部を嵌入してあり、それら
の接合面に前記の止水滑材３が塗布されている。
この種の枝管接合部は接合面がかなり凹凸状とな
つており、従来の止水滑材では充分満足できる止
水ができなかつたが、本考案の止水滑材を用いる
ことにより、高度の止水効果を得ることができ
る。 FIG. 1 is a cross-sectional view of the main part showing one embodiment of the water stop structure of the present invention. In this embodiment, the end of the branch pipe 2 is fitted into a part of the pipe wall of the main pipe 1. , the above-mentioned waterproof lubricant 3 is applied to their joint surfaces.
The joint surface of this type of branch pipe joint is quite uneven, and conventional water-stop lubricants were not able to provide a satisfactory water stop.However, by using the water-stop lubricant of this invention, a highly You can get the water stopping effect.
また本考案の止水構造は、管の種類等に制限さ
れず、ヒユーム管の他、鉄管、プラスチツク管等
接着性の悪いパイプ類の継手部にも適用できる。 Furthermore, the water-stopping structure of the present invention is not limited to the type of pipe, and can be applied to joints of pipes with poor adhesion, such as fume pipes, iron pipes, and plastic pipes.
次に、本考案の止水構造による止水効果を試験
例及び比較試験例を挙げて説明する。 Next, the water-stopping effect of the water-stopping structure of the present invention will be explained with reference to test examples and comparative test examples.
（試験例）
グリセリンにプロピレンオキサイドを付加して
えられた分子量4500のポリエーテル1500部と、ト
ルイレンジイソシアネート174部とを混合し、常
法により90℃で３時間反応せしめて、NCO基含
有量2.5％の、末端NCO基を有する非水膨潤性ウ
レタンプレポリマーＡを得た。(Test example) 1500 parts of polyether with a molecular weight of 4500 obtained by adding propylene oxide to glycerin and 174 parts of toluylene diisocyanate were mixed and reacted at 90°C for 3 hours using a conventional method to determine the NCO group content. 2.5% of non-water swellable urethane prepolymer A having terminal NCO groups was obtained.
別に、グリセリンにプロピレンオキサイドとエ
チレンオキサイドをランダムに付加して得られた
分子量7000、オキシエチレン基含有率80％の３官
能性ポリエーテル20部と、プロピレンオキサイド
とエチレンオキサイドをランダムに付加して得ら
れる分子量5000、オキシエチレン基含有率70％の
２官能性ポリエーテル80部とを混合した。この混
合ポリエーテル1000部と、トルイレンジイソシア
ネート71部とを混合し、常法により90℃で３時間
反応せしめて、NCO基含有量1.6％の、末端NCO
基を有する水膨潤性ウレタンプレポリマーＢを得
た。 Separately, 20 parts of a trifunctional polyether with a molecular weight of 7000 and an oxyethylene group content of 80% obtained by randomly adding propylene oxide and ethylene oxide to glycerin, and a trifunctional polyether obtained by randomly adding propylene oxide and ethylene oxide to glycerin. 80 parts of bifunctional polyether having a molecular weight of 5,000 and an oxyethylene group content of 70% were mixed. 1,000 parts of this mixed polyether and 71 parts of toluylene diisocyanate were mixed and reacted at 90°C for 3 hours by a conventional method to form a terminal NCO with an NCO group content of 1.6%.
A water-swellable urethane prepolymer B having groups was obtained.
上記プレポリマーA100部、上記プレポリマー
B30部、炭酸カルシウム25部、酸化チタン10部及
びカーボンブラツク３部を配合して、本考案に係
るペースト状湿気硬化型水膨潤性ウレタンプレポ
リマー（止水滑材Ａ）を得た。 100 parts of the above prepolymer A, the above prepolymer
By blending 30 parts of B, 25 parts of calcium carbonate, 10 parts of titanium oxide, and 3 parts of carbon black, a paste-like moisture-curable water-swellable urethane prepolymer (waterproof lubricant A) according to the present invention was obtained.
上記止水滑材Ａは、窒素封止中、室温で約６ケ
月安定であり、通常の使用において充分な保存安
定性を有することが確認された。 It was confirmed that the waterproof lubricant A was stable for about 6 months at room temperature under nitrogen sealing, and had sufficient storage stability in normal use.
さらに、上記止水滑材Ａを第２図に示す如く用
いた止水構造について止水圧試験を行つた。即
ち、ヒユーム管１０，１０の接合部に、止水滑材
Ａを塗布してカラー２０を被せ、止水滑材Ａを硬
化させ、管内部に水を仕込み、これを加圧した。
止水滑材Ａの膨潤前は2.5Kgｆ／cm2で漏水し、そ
の膨張後は10Kgｆ／cm2で漏水した。 Furthermore, a water stop pressure test was conducted on a water stop structure using the above water stop slip material A as shown in FIG. That is, the water-stop lubricant A was applied to the joint between the hume pipes 10, 10, and the collar 20 was placed on the water-stop lubricant A, the water-stop lubricant A was cured, and water was charged inside the pipes and pressurized.
Before swelling of waterproof lubricant A, water leaked at 2.5 kgf/cm 2 , and after expansion, water leaked at 10 kgf/cm 2 .
（比較試験例）
前記プレポリマーB130部、炭酸カルシウム25
部、酸化チタン10部及びカーボンブラツク３部を
配合して、ペースト状湿気硬化型水膨潤性ポリウ
レタンプレポリマー（止水滑材Ｂ）を得た。(Comparative test example) 130 parts of the above prepolymer B, 25 parts of calcium carbonate
10 parts of titanium oxide and 3 parts of carbon black to obtain a pasty moisture-curable water-swellable polyurethane prepolymer (waterproof lubricant B).
上記止水滑材Ｂは、窒素封止中、室温で５日間
で増粘開始し、10日間で半硬化するため、前記止
水滑材Ａと比較して、その保存安定性が著しく劣
ることが判明した。 The above-mentioned waterproof lubricant B starts to thicken in 5 days at room temperature under nitrogen sealing, and semi-cures in 10 days, so its storage stability is significantly inferior to that of the waterproof lubricant A. There was found.
さらに、試験例と同じ止水圧試験を行つたとこ
ろ、止水滑材Ｂの膨張前は1.5Kgｆ／cm2で漏水し、
その膨張後は3.5Kgｆ／cm2で漏水した。 Furthermore, when the same water stop pressure test as in the test example was conducted, water leaked at 1.5 kgf/cm 2 before the water stop lubricant B expanded.
After the expansion, water leaked at 3.5Kgf/cm 2 .
［考案の効果］ 本考案の効果は次のとうりである。[Effect of the idea] The effects of the present invention are as follows.
従来のポリウレタン系止水滑材は、水と反応
する親水性ではあるが水膨潤性ではないのに対
し、本考案で用いられるポリウレタン樹脂は水
膨潤性であるため、水と接触すると膨張してす
きまをふさぎ、大きいすきまでも高度の止水効
果が得られる。 Conventional polyurethane-based waterproof lubricants are hydrophilic and react with water, but are not water-swellable.However, the polyurethane resin used in this invention is water-swellable, so it expands when it comes into contact with water. It closes gaps and provides a high level of water-stopping effect even in large gaps.
従来のポリウレタン系を始めとする止水滑材
は溶液タイプで粘度が低く、したがつて塗布の
際たれが生じやすい欠点を有していたが、本考
案の止水構造ではペースト状ポリウレタン樹脂
のためたれが生じることがなく、塗布の作業性
が良い。 Conventional water-stop lubricants, including polyurethane-based ones, are solution-type and have low viscosity, which has the disadvantage that they tend to smear when applied.However, the water-stop structure of the present invention uses paste-like polyurethane resin. There is no dripping and the workability of application is good.
また本考案のペースト状ポリウレタン樹脂
は、強度や耐久性にも優れており、総合的にも
優秀な止水滑材である。 Furthermore, the paste-like polyurethane resin of the present invention has excellent strength and durability, and is an excellent waterproof lubricant overall.
第１図は本考案の止水構造の一実施例を示す要
部の断面図、第２図は止水圧試験に供した止水構
造の断面図である。
１……本管、２……枝管、３……止水滑材。
FIG. 1 is a sectional view of a main part of an embodiment of the water stop structure of the present invention, and FIG. 2 is a sectional view of the water stop structure subjected to a water stop pressure test. 1...Main pipe, 2...Branch pipe, 3...Waterstop lubricant.
Claims (1)
らを接合した管継手部の止水構造において、上記
本管と上記枝管との接合面に、止水滑材として、 一般式 Ｒ〔（OR1）oOH〕p （ここにＲは多価アルコール残基：（OR1）は
オキシエチレン基と炭素数３〜４のアルキレン基
を有するオキシアルキレン基とからなるポリオキ
シアルキレン鎖、但し、オキシエチレン基の割合
は分子量の50〜90％を占める。：ｎはオキシアル
キレン基の重合度を示す数で水酸基当量が50〜
4000となるに相当する数：ｐは２〜８の数）で示
されるポリエーテルポリオールの一種又は二種以
上の混合物とポリイソシアネートとから得た末端
イソシアネート基含量1.5〜10％の水膨潤性ウレ
タンプレポリマー１と、 一般式 R2〔（OR3）nOH〕q （ここにR2は多価アルコール残基：（OR3）は
炭素数３〜４のアルキレン基を有するオキシアル
キレン鎖、：ｍはオキシアルキレン基の重合度を
示す数で水酸基当量が500〜4000となるに相当す
る数：ｑは２〜８の数）で示されるポリエーテル
ポリオールの一種又は二種以上の混合物とポリイ
ソシアネートとから得た末端イソシアネート基含
有非水膨潤性ウレタンプレポリマー２と、充填剤
３とを、上記成分２100部に対し、上記成分１20
〜100部、上記成分３２〜100部の割合で混合して
なるペースト状湿気硬化型水膨潤性ポリウレタン
未硬化物が塗布されていることを特徴とする管継
手部の止水構造。[Claims for Utility Model Registration] In a water-stop structure of a pipe joint in which the end of a branch pipe is fitted into a part of the pipe wall of the main pipe and joined together, the joint surface of the main pipe and the branch pipe In addition, as a waterproof lubricant, a compound with the general formula R[(OR 1 ) o OH] p (where R is a polyhydric alcohol residue: (OR 1 ) has an oxyethylene group and an alkylene group having 3 to 4 carbon atoms) A polyoxyalkylene chain consisting of an oxyalkylene group, provided that the proportion of oxyethylene groups accounts for 50 to 90% of the molecular weight.: n is a number indicating the degree of polymerization of the oxyalkylene group, and the hydroxyl equivalent is 50 to 90%.
A water-swellable urethane with a terminal isocyanate group content of 1.5 to 10% obtained from one or a mixture of two or more polyether polyols represented by the number corresponding to 4000 (p is a number from 2 to 8) and a polyisocyanate. Prepolymer 1 and the general formula R 2 [(OR 3 ) n OH] q (where R 2 is a polyhydric alcohol residue: (OR 3 ) is an oxyalkylene chain having an alkylene group having 3 to 4 carbon atoms: m is a number indicating the degree of polymerization of the oxyalkylene group and corresponds to a hydroxyl equivalent of 500 to 4000; q is a number from 2 to 8); or a mixture of two or more polyether polyols and polyisocyanate. Non-water swellable urethane prepolymer 2 containing terminal isocyanate groups obtained from
A water-stopping structure for a pipe joint, characterized in that an uncured pasty moisture-curable water-swellable polyurethane is coated by mixing 32 to 100 parts of the above-mentioned components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985009183U JPH0442635Y2 (en) | 1985-01-28 | 1985-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985009183U JPH0442635Y2 (en) | 1985-01-28 | 1985-01-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61126175U JPS61126175U (en) | 1986-08-08 |
| JPH0442635Y2 true JPH0442635Y2 (en) | 1992-10-08 |
Family
ID=30489160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985009183U Expired JPH0442635Y2 (en) | 1985-01-28 | 1985-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442635Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58200887A (en) * | 1982-05-14 | 1983-11-22 | 株式会社ミツウマ | Cut-off method for joint of pipe |
-
1985
- 1985-01-28 JP JP1985009183U patent/JPH0442635Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58200887A (en) * | 1982-05-14 | 1983-11-22 | 株式会社ミツウマ | Cut-off method for joint of pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61126175U (en) | 1986-08-08 |
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