JPH0859962A - Lining composition for inner surface of pipe and treating of inner surface of pipe using the same - Google Patents

Abstract

PURPOSE: To obtain the subject low-viscosity composition, comprising a bisphenol A type and F type epoxy resins, a higher alcohol-based diluent, a thixotropic agent and a curing agent, having high thixotropy, excellent in operating efficiency, etc., and useful for pipes such as water line pipes or gas pipes. CONSTITUTION: This composition comprises (A) preferably 100 pts.wt. mixture comprising preferably 100 pts.wt. bisphenol A type epoxy resin and preferably 10-60 pts.wt. bisphenol F type epoxy resin, (B) preferably 10-40 pts.wt. higher alcohol-based diluent (preferably a hydroxy compound prepared by substituting a part of a >=6C chain or alicyclic hydrocarbon with hydroxyl groups), (C) preferably 5-30 pts.wt. thixotropic agent comprising organic bentonite and finely divided silica powder at a mixing ratio of preferably 100 pts.wt. bentonite to 10-60 pts.wt. finely divided silica powder and (D) a curing agent (preferably an aliphatic or an alicyclic polyamine). The viscosity of the composition just after mixing the components is 1000-50000cP and the thixotropy index is 2.0-8.0.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a form in which a supply pipe for drawing gas or water to a demand destination is branched by a conduit of a main pipeline laid under a road such as a gas pipe or a water pipe. The present invention relates to a composition for lining an inner surface of a pipe, in which a liquid resin is introduced into the pipe for lining the existing pipe for the purpose of rehabilitating the inside of the pipe of the supply pipe, and a lining method using the same.

[0002]

2. Description of the Related Art In recent years, due to the overcrowding of cities, the cost required for the maintenance and management of gas pipes has been increasing, and the reduction of cost has become a major need for technological development.

[0003] At present, in order to meet the above-mentioned needs, development is underway in order to utilize the function of a conduit already buried and to realize efficient maintenance of the conduit.

Conventionally, a repairing method has been known in which a liquid resin is introduced into the pipe of the existing pipe as described above and a lining is applied thereto. For example, in JP-A-63-175677, a lining resin is put in a housing pipe, which is connected to a supply pipe having a repair, and then a pressurized gas by a compressor is supplied to the housing pipe, and the lining resin in the housing pipe is supplied. Has been described, in which a long tube including a branch tube is rapidly lined by moving the tube at a constant speed.

In addition to this, JP-A 1-230688 and JP-A-63
Various lining methods and lining agents have been proposed in JP-A-302068 and JP-A-3-52919.

[0006]

However, even if a resin having a low viscosity and thixotropic property is obtained by simply blending a filler or a thixotropic agent with a base resin, such as the above-mentioned lining agent, a lining material is obtained. It has been difficult to obtain a lining resin that secures a constant film thickness later and forms a smooth lining film without film breakage.

The present invention solves the above problems, has a relatively low viscosity, a high thixotropic property, is extremely workable at the time of lining, and secures a constant film thickness, and a film. The purpose is to form a smooth and smooth lining film.

[0008]

The present inventors have made diligent efforts to solve the above-mentioned problems, and as a result, a composition for lining the inner surface of pipes such as water pipes and gas pipes, wherein the composition is A) bisphenol A type epoxy resin and bisphenol F type epoxy resin b) higher alcohol diluent c) thixotropic agent consisting of organic bentonite and finely powdered silica d) a) sufficient amount of curing agent to cure The viscosity immediately after mixing when the above components are mixed and used is 1,000 to 50,000 cp, and the thixotropic index range is 2.0 to 8.0. By using the composition for lining the inner surface of the pipe, Solved.

Further, the compounding ratio of the composition is a) 100 parts by weight of bisphenol A type epoxy resin and bisphenol F type epoxy resin, b) higher alcohol diluent 10 to 10 parts by weight.
40 parts by weight, c) 5 to 30 parts by weight of a thixotropic agent consisting of organic bentonite and finely divided silica, and d) an amount sufficient to cure a) are preferable.

Among the components constituting the lining resin of the present invention, as the epoxy resin of a), a conventionally known epoxy resin can be used, and the viscosity after adjusting the lining agent is 1,000 to 50,000 cp. Those having a relatively low viscosity are preferable.

More preferably, the mixture of the bisphenol A type epoxy resin and the bisphenol F type epoxy resin is 10 to 60 parts by weight of the bisphenol F type epoxy resin to 100 parts by weight of the bisphenol A type epoxy resin.

Next, as the thixotropic agent of c) used in the present invention, a combination of organic bentonite and fine powder silica is preferable.

The organic bentonite is a powdery substance obtained by finely crushing montmorillonite ore, which is surface-treated with various organic substances.

On the other hand, the finely powdered silica refers to ultrafine particulate anhydrous silica produced by reacting a volatile compound containing silicon in a gas phase.

The mixing ratio of the former organic bentonite and finely divided silica is 10 to 60 parts by weight, preferably 20 to 40 parts by weight, with respect to 100 parts by weight of the former. If denaturation cannot be obtained and too much, thixotropy becomes too high.

The addition amount of the total thixotropic agent of c) to the whole composition is 5 based on 100 parts by weight of the component of a).
Amounts of up to 25 parts by weight are appropriate. If this amount is too small, thixotropy is low, and if too large, thixotropy is too high.

Specific examples of the organic bentonites include Orben D, NeWD Orben, Takuya Kaolin Hard Sill, Burgess Pigmwnt Clay # 30 and Southern Clay Clay # 33 manufactured by Shiraishi Kogyo Co., Ltd. Fine powder silica is manufactured by Nippon Aerosil Co., Ltd. under the trade name Erosir # 200, R972, R202, and R202.
974, the same R805, the same R812 and the like.

As the d) epoxy resin curing agent used in the present invention, generally known curing agents can be used. For example, aliphatic polyamines, alicyclic polyamines, modified polyamidoamines, aromatic polyamines, polymercaptans, etc. And preferably aliphatic polyamines and alicyclic polyamines. The reason why these curing agents are preferable is that they are suitable for imparting low viscosity and high thixotropic properties to the composition after mixing the respective components.

The above components are mixed when the pipe is lined. The mixing procedure is not specifically decided,
After mixing the epoxy resin of a), the higher alcoholic diluent of b) and the thixotropic agent of c), it is preferable to add and knead the epoxy resin curing agent of d), more preferably a).
It is also possible to store the respective components (1) to (d) in a two-liquid state and mix and stir them before use.

More specifically, a thixotropic agent containing a) an epoxy resin, b) a higher alcohol diluent and c-1) an organic bentonite as main components and / or c-2).
A main agent composition comprising a thixotropic agent containing finely divided silica as a main component, an epoxy resin curing agent of d), and a thixotropic agent mainly containing finely divided silica of c-2) and / or c-1). C-1) and c in the mixing system when separating and mixing into a two-component system of an assistant consisting of a thixotropic agent whose main component is organic bentonite
-2) and the main agent composition and the auxiliary agent are blended so as to be always present, and the viscosity immediately after mixing the main agent composition and the auxiliary agent is 1,000 to 50,000 cp, and the thixotropic index range is 2.0 to 8.0 when used. Adjust as in.

In the above case, the composition ratio is a) 100 parts by weight of bisphenol A type epoxy resin and bisphenol F type epoxy resin, b) higher alcohol diluent.
10 to 40 parts by weight, c-1) thixotropic agent containing organic bentonite as a main component 5.0 to 25 parts by weight, c-2) thixotropic agent containing finely divided silica as a main component 0.5 to 10 parts by weight, d) a It is preferred that the amount of curing agent is sufficient to cure

As a mixing method in this case, for example, 100 parts by weight of the a) epoxy resin (a mixture of a bisphenol A type epoxy resin and a bisphenol F type epoxy resin in a weight ratio of 1: 1) is used as an organic compound. Bentonite 10 to 25 parts by weight, fine powdered silica 0.5 to 10 parts by weight and higher alcohol-based diluent 10 to 40 parts by weight are mixed, and the viscous material is kneaded with a roll to obtain a uniform liquid material. . Further, a part of the above-mentioned fine powder silica is kneaded with the curing agent of d) to prepare a viscous material, which is used as an auxiliary agent.

In this way, the workability is greatly improved by preliminarily dividing and storing the main agent and the auxiliary agent. Further, the workability during use is further improved by imparting the same degree of viscosity thixotropic property to facilitate the mixing of the two.

In the present invention, various conventionally known additives can be added to such an extent that the object of the present invention is not impaired. For example,
Additives other than organic bentonite and fine powder silica can be added for the purpose of adjusting the viscosity, and pigments, dyes, etc. can be added for the purpose of coloring the lining agent. Further, an antifoaming agent or a surfactant can be added to prevent foaming of the lining agent.

[0025]

EXAMPLES The present invention will be described in detail below based on examples.
First, Examples 1 to 4 are prepared with the following composition. <Compounding example 1> Bisphenol A type epoxy resin 70.0 parts by weight (Epicoat 828 manufactured by Yuka Shell Epoxy Co., Ltd.) Bisphenol F type epoxy resin 30.0 parts by weight (Epicoat 807 manufactured by Yuka Shell Epoxy Co., Ltd.) Higher alcohol diluent 19.0 parts by weight Cyclo Hexanol Curing agent Modified alicyclic amine 15.0 parts by weight (Vermisan C-30 Henkel Hakusui Co., Ltd.) Curing agent Aromatic polyamine 35.0 parts by weight (Ankamine LV ACI Japan Co., Ltd.) Thixotropic agent Organic bentonite 8.5 parts by weight (Hardsil Tsuchiya Kaolin Industry) Thixotropic agent 2.5 parts by weight of finely divided silica (Aerosil # 200, manufactured by Nippon Aerosil Co., Ltd.)

<Formulation Example 2> Bisphenol A type epoxy resin 75.0 parts by weight (Epicoat 828 manufactured by Yuka Shell Epoxy Co., Ltd.) 25.0 parts by weight bisphenol F type epoxy resin (Epicoat 806 manufactured by Yuka Shell Epoxy Co.) Higher alcohol diluent 23.0 Parts by weight Amino alcohol curing agent modified aliphatic amine 27.0 parts by weight (Fujicure 5003D Fuji Kasei Kogyo Co., Ltd.) curing agent modified alicyclic polyamine 23.0 parts by weight (Epicure 113 Yuka Shell Epoxy Co., Ltd.) thixotropic agent modified organic bentonite 10.5 parts by weight Parts (Clay # 30 Burgess Pigment) thixotropic agent finely divided silica 3.0 parts by weight (Aerosil R202 Nippon Aerosil Co., Ltd.)

<Compounding Example 3> * Base compound * Bisphenol A type epoxy resin 73.0 parts by weight (Epicote 828 manufactured by Yuka Shell Epoxy Co., Ltd.) Bisphenol F type epoxy resin 27.0 parts by weight (Adeka Resin EP4900 manufactured by Asahi Denka Kogyo Co., Ltd.) Agent 17.0 parts by weight Decyl Alcohol Thixotropic agent Organic Bentonite 12.5 parts by weight (Clay # 33 Southern Clay) Thickening agent Fine powder silica 0.7 parts by weight (Aerosil R974 Nippon Aerosil Co., Ltd.) White pigment 2.5 parts by weight (Titanium oxide A- 150 Shiraishi Kogyo Co., Ltd. * Auxiliary agent * Curing agent Modified aliphatic amine 14.6 parts by weight (Vermisan SA-28 Henkel Hakusui Co., Ltd.) Curing agent Modified alicyclic polyamine 47.0 parts by weight (Ankamin 1882 ACI Japan Co.) Thixotropic agent 4.5 parts by weight of finely divided silica (Aerosil R972 manufactured by Nippon Aerosil Co., Ltd.) green Fee 0.3 parts by weight (manufactured by VT6510 Dainichiseika Color & Chemicals Mfg. Co., Ltd.)

<Formulation Example 4> * Base compound * Bisphenol A type epoxy resin 73.2 parts by weight (Epicoat 828 manufactured by Yuka Shell Epoxy Co., Ltd.) Bisphenol F type epoxy resin 26.8 parts by weight (Epicoat 806L manufactured by Yuka Shell Epoxy Co., Ltd.) Higher alcohol type Diluent 22.0 parts by weight Benzyl alcohol thixotropic agent Bentonite 14.5 parts by weight (NewD Olben Shiraishi Industry Co., Ltd.) thixotropic agent fine powder silica 1.3 parts by weight (CABOJIR TS-720 Tomoe Industry Co., Ltd.) white pigment 3.0 parts by weight (titanium oxide) A-150 Shiraishi Kogyo Co., Ltd.) Antifoaming agent 0.3 parts by weight (Disparlon 1925N Kusumoto Kasei Kogyo Co., Ltd.) * Auxiliary agent * Curing agent Modified aliphatic amine 11.0 parts by weight (Vermisan I-376 Henkel Hakusui Co.) Curing agent Modified fat Cyclic polyamine 55.0 parts by weight (Fujicure FXD-821 manufactured by Fuji Kasei Kogyo Co., Ltd.) Modifier Fine powder silica 4.2 parts by weight (Cabozilla TS-720 manufactured by Tomoe Kogyo Co., Ltd.) Green pigment 0.3 parts by weight (VT6510 manufactured by Dainichiseika Kogyo Co., Ltd.) Defoaming agent 0.04 parts by weight (Disparlon 1925N Kusumoto Kasei Kogyo Co., Ltd.) Examples 1 to 4 were prepared with the following composition.

<Formulation Example 5> Bisphenol A type epoxy resin 70.0 parts by weight (Epicoat 828 manufactured by Yuka Shell Epoxy Co., Ltd.) Bisphenol F type epoxy resin 30.0 parts by weight (Epicoat 807 manufactured by Yuka Shell Epoxy Co., Ltd.) Diluent 28.4 parts by weight ( Alkyl monoglycidyl ether) Curing agent Modified alicyclic amine 4.6 parts by weight (Ancamine 1618 ACI Japan) Curing agent Aromatic polyamine 40.0 parts by weight (Epicure Z Yuka Shell Epoxy Co., Ltd.) Thixotropic agent Organic bentonite 11.6 parts by weight ( Orben D Shiraishi Kogyo Co., Ltd.) Thixotropic agent Fine powdered silica 1.5 parts by weight (Aerosil # 200 manufactured by Nippon Aerosil Co., Ltd.)

<Formulation Example 6> Bisphenol F type epoxy resin 100.0 parts by weight (Epicote 807 manufactured by Yuka Shell Epoxy Co., Ltd.) Higher alcohol diluent 28.0 parts by weight (cyclohexanol) Curing agent Modified polyamidoamine 50.0 parts by weight (Tomede 245HS Fuji Kasei Kogyo Co., Ltd.) Thixotropic organic bentonite 27.4 parts by weight (Hardsil Tatsuya Kaolin Kogyo Co., Ltd.) Thixotropic agent 10.3 parts by weight of finely divided silica (Aerosil R202 Nippon Aerosil Co., Ltd.)

<Formulation Example 7> Bisphenol A type epoxy resin 65.0 parts by weight (ELA-128 manufactured by Sumitomo Chemical Co., Ltd.) Bisphenol F type epoxy resin 35.0 parts by weight (Epototo YDF-165 manufactured by Tohto Kasei Co., Ltd.) Higher alcohol diluent 29.0 Parts by weight (decyl alcohol) thixotropic agent mica flakes 21.7 parts by weight (Szolite Mica 40S manufactured by Kuraray Co., Ltd.) thixotropic agent 2.9 parts by weight finely divided silica (Aerosil R974 manufactured by Nippon Aerological) white pigment 0.3 parts by weight (titanium oxide A- 150 Shiraishi Kogyo Co., Ltd.) * Auxiliary agent * Curing agent Modified polyamidoamine 54.0 parts by weight (Tomide 280B made by Fuji Kasei Kogyo Co., Ltd.) Curing agent Modified alicyclic polyamine 21.0 parts by weight (Epicure 113 Yuka Shell Epoxy Co., Ltd.) Thixotropic agent 5.0 parts by weight of finely powdered silica (Aerosil R974 manufactured by Nippon Aerosil Co., Ltd.) Color pigment 0.1 parts by weight (manufactured by VT6510 Dainichiseika Color & Chemicals Mfg. Co., Ltd.)

<Formulation Example 8> * Base compound * Bisphenol A type epoxy resin 74.0 parts by weight (Epototo YD-116 Toto Kasei Co., Ltd.) Bisphenol F type epoxy resin 26.0 parts by weight (Adeka Resin EP4900 Asahi Denka Co., Ltd.) Higher alcohol type diluent 21.0 parts by weight (cyclohexanol) thixotropic agent fibrous thixotropic agent 2.2 parts by weight (Sepiolite PGS Gunze) thixotropic agent plastic balloon 10.3 parts by weight (Microsphere MFL-80CA manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.) white pigment 0.2 parts by weight Part (Epoxy white 1003 manufactured by Toyo Ink Mfg. Co., Ltd.) 0.5 part by weight antifoaming agent (Tysparon 1925N manufactured by Kusumoto Kasei Kogyo Co., Ltd.) * Auxiliary agent * Curing agent modified aliphatic amine 45.0 parts by weight (Epicure DX-148 manufactured by Yuka Shell Epoxy Co., Ltd.) ) Curing agent Modified alicyclic polyamine 19.0 parts by weight (Fujicure 42 33 Fuji Kasei Kogyo Co., Ltd. Thixotropic fine powder silica 3.4 parts by weight (Aerosil # 200 Nippon Aerosil Co., Ltd.) Green pigment 0.1 parts by weight (VT6510 Dainichiseika Kogyo Co., Ltd.) Defoamer 0.1 parts by weight (Disparlon 1925N Kusumoto Kasei) (Industrial company)

Each of the formulations 1-8 shown above (Examples 1-
4, Comparative Examples 1 to 4) were introduced into the pipe by the following procedure, and the quality of the lining was judged. In addition, formulation example 1,
For Nos. 2, 5, and 6, the respective components were mixed immediately before the lining to adjust the lining agent. In addition, formulation examples 3, 4, 7, and 8 are
The main agent and auxiliary agent were prepared in advance, and both were mixed and used immediately before lining.

The lining repairing method for the inner surface of the pipe using the composition for lining according to the present invention will be explained. It is an existing pipe in a form in which a supply pipe as a branch pipe is branched from a main pipe (conduit). An opening is provided on the distal end side of the pipe, and the inside of the pipe extending from the opening to the branch on the main pipe line side is lined.

First, in the first step, a water-absorbing agent having a required amount of water-absorption capability that does not compressively deform behind the introduced resin plug is provided in series through an opening provided at the end portion on the supply pipe side, and a shielding pig. And the pump is used to pressurize water from behind the pig to transfer the resin plug to the branch position on the main pipeline side.

This will be specifically described with reference to FIGS. 1 to 4. In FIG. 1, reference numeral 1 indicates a main pipe, and 2 indicates a supply pipe branched from the main pipe. First, the lining pig 4 is inserted into the opening 3 provided at the end portion on the supply pipe 2 side.

Next, as shown in FIG. 2, the resin tank 5 is connected by the clamp metal fitting 6 and the pump portion 7 is pushed to inject a required amount of the composition 8 into the supply pipe 2 through the opening 3.

Thereafter, as shown in FIG. 3, a cassette 11 in which a water-absorbing agent 9 having a required amount of water-absorption ability that does not compressively deform and a water-impermeable pig 10 are arranged in series is set in the opening 3 and the cassette is set. The composition 8 is transferred to the branch position on the main pipeline side by sending a required amount of water under pressure from the rear of the water shielding pig 10 of 11.

As shown in FIG. 4, after the injection of the present composition is completed, pressurized water is supplied by connecting a water meter 12 and operating the pump 13 to pump a required amount of water from the water tank 14.
Water is absorbed in 13 and sent.

In the second step, as shown in FIG. 5, the recovery tank 15 is connected via the clamp metal fitting 6, and the pump 13 is connected to the outlet side of the recovery tank 15.

By starting the water absorption operation by the pump 13 in this state, the water sent in the first step is sequentially collected in the tank 15. Further, due to the suction force of the pump 13, the present composition 8 injected to the branch end on the main pipeline side in the first step moves to the tank 15 side together with the water absorbing agent 9 with the water shielding pig 10 at the head.

In the transferring step of the composition 8 to the branch position on the main pipeline side in the first step and the withdrawal step in the second step, as shown in FIG. While the coating film is being formed, it is consumed at the same time, and the entire inside of the pipe including the supply pipe and the meter stand pipe is lined.

Criteria for evaluation 1) Maximum extension: The arrival time of the maximum extension is set by setting the target of the extension distance to 20 m and measuring the time to reach it, and if it is within 5 minutes, it is judged as passing. 2) Suction time: Measured from the time when suction is started after the maximum extension is reached-Beginning of the pig: The time until the lining pig at the tip starts to move is within 5 minutes and it is judged as passing.・ Completion of lining: 1 by measuring the time from the start of suction to the end of lining (collection of lining pig)
Pass within 0 minutes.

The above 1). The reason for the determination of 2) is that those having 5 minutes or more are determined to have a high viscosity and the like, which causes a great resistance when pulling out the pig, or makes it impossible to pull out the pig.

3) Pig advance distance: This is a measurement of the pig advance distance due to residual pressure. Moving distance: ± 5 cm or more …… ◎ Moving distance: ± 10 cm or less …… ○ Moving distance: ± 30 cm or less …… △ Moving distance: ± 50 cm or more …… ×

The reason for the above judgment is that the lining construction range is set exactly from the supply pipe to the branch pipe position, and if the pig is advanced by 5 cm or more due to residual pressure, the pig will fall from the supply pipe to the branch pipe. is there.

4) Lining property: The lining property was evaluated by directly observing the lining film by cutting the pipe after the lining agent was cured after the lining was applied. a) Vertical tube: ⊚: No film breakage, uniform film thickness ◯: Decrease in film thickness after curing due to sagging of lining agent. (Within 30%) Δ: The film thickness after curing is reduced due to sagging of the lining agent. (Within 50%) ×: Blockage of the pipe is observed due to sagging of the lining agent. b) Joint section: ◎: No coating left, uniform coating ○: No coating left, coating is uneven Δ: There is a small amount of coating left ×: There is a large amount of coating left c) Straight pipe …… ◎: Film breakage None, uniform film thickness ○: No film breakage, partial sagging in the lower part △: No film breakage, partial sagging in the lower part, and the inner diameter of the pipe is decreasing ×: Film breakage part Occurs a lot

5) Entanglement of air in the standing pipe: Entanglement of air in the standing pipe was evaluated by observing the entangled state of air when the lining agent passed through the standing pipe. (Meaning of evaluation: When predicting the reaching distance of the lining agent from the filling amount, an error of 10 cm or more due to air entanglement is a decisive obstacle in the construction method. .)

Evaluation ⊚: Air entanglement and air voids are not seen. ◯: Air entanglement and air voids are partially seen. Δ: Air entanglement and air voids are intermittently seen.
There is an error in the predicted reach. ×: Air entanglement and air gap are large, and it is impossible to predict the predicted reach. Table 1 shows the results.

[0050]

[Table 1]

The above-mentioned compounds 1 to 8 are filled in the socket plug 16 shown in FIG. 7 (A). Next, the socket plug 16 was turned upside down and the sag property of each compound (B) was observed and evaluated. The results are shown in Table 2.

[0052]

[Table 2]

[0053]

In summary, according to the present invention, it is possible to secure a constant film thickness and form a smooth lining layer film without film breakage, as compared with the conventional lining method.

Therefore, according to the present invention, the lining film can be formed more reliably as compared with the conventional lining method, and further, the formation of the lining film by the method of the present invention greatly improves the durability of the pipe. .

[Brief description of drawings]

FIG. 1 is a diagram showing a step of inserting a lining pig through an opening of a supply pipe in a lining repairing method for an inner surface of a pipe used in the present invention.

FIG. 2 is a view showing a step of injecting the present composition through an opening of a supply pipe in the above-mentioned construction method.

FIG. 3 is a diagram showing a step of setting a cassette, in which a water absorbing agent and a water blocking pig are arranged in series, in the opening of the supply pipe in the above construction method.

FIG. 4 is a diagram showing a step of moving the present composition to a branch position of a supply pipe in the above construction method.

FIG. 5 is a diagram showing a step of pulling back the composition moved to the branch position of the supply pipe in the above construction method.

FIG. 6 is a diagram showing completion of lining in the above construction method.

FIG. 7 is a diagram showing a test method of sagging property.

[Explanation of symbols]

Reference numeral 1 indicates a main pipe, and 2 indicates a supply pipe branched from the main pipe. First, the end portion 2 on the side of the supply pipe 2 is the supply pipe 3, the opening 4 is the lining pig 5, the resin tank 6 is the clamp metal fitting 7, the pump portion 8 is the present composition 9, the water absorbing agent 10 is the water shielding pig 11 Is cassette 12 is water meter 13 is pump 14 is water tank 15 is recovery tank 16 is socket plug

Claims (13)

[Claims] 1. A composition for lining an inner surface of a pipe such as a water pipe or a gas pipe, wherein the composition comprises a) a bisphenol A type epoxy resin and a bisphenol F type epoxy resin b) a higher alcohol diluent c ) A thixotropic agent consisting of organic bentonite and finely powdered silica d) A sufficient amount of a curing agent to cure a), and the viscosity immediately after mixing when the above components are mixed and used is 1,000 to 50,000. cp and a thixotropy index range of 2.0 to 8.0, a composition for lining an inner surface of a pipe. 2. A composition for lining an inner surface of a pipe such as a water pipe or a gas pipe, wherein the composition is a) bisphenol A type epoxy resin and bisphenol F type epoxy resin 100 parts by weight b) higher alcohol type Diluent 10-40 parts by weight c) Thixotropic agent consisting of organic bentonite and finely divided silica
The composition for lining the inner surface of a pipe according to claim 1, which comprises 5 to 30 parts by weight d) an amount of a curing agent sufficient to cure a). 3. The component a) of the composition, wherein the mixing ratio of the bisphenol A type epoxy resin and the bisphenol F type epoxy resin is 100 parts by weight of the former and 10 to 60 of the latter.
The composition for lining the inner surface of the pipe according to claim 2, which is part by weight. 4. The pipe inner surface according to claim 2, wherein the component b) in the composition is a hydroxy compound in which a chain or alicyclic hydrocarbon having 6 or more carbon atoms is partially substituted with a hydroxyl group. Lining composition. 5. In the composition, the thixotropic agent of c) is a mixture of organic bentonite and finely divided silica powder in a weight ratio of the former.
The composition for lining an inner surface of a pipe according to claim 2, which is 10 to 60 with respect to 100 parts by weight. 6. The composition for lining the inner surface of a pipe according to claim 2, wherein the curing agent d) in the composition is an aliphatic polyamine, an alicyclic polyamine, or both. 7. A composition for lining an inner surface of a pipe such as a water pipe or a gas pipe, wherein the composition is mainly a) bisphenol A type epoxy resin and bisphenol F type epoxy resin c-1) organic bentonite. A thixotropic agent as a component c-2) a thixotropic agent containing finely divided silica as a main component d) an a) which is composed of a sufficient amount of a curing agent to cure a) and is a) or b) among the above components. , C-1) and / or c-2), and a auxiliary consisting of d) and c-2) and / or c-1) are separated into a two-component system. When mixing the auxiliaries c-1) and c-
2) and the main agent and the auxiliary agent are blended so that they are always present in the mixed system, and the viscosity immediately after mixing the main agent and the auxiliary agent is
A composition for lining an inner surface of a pipe, which is 1,000 to 50,000 cp and has a thixotropy index range of 2.0 to 8.0. 8. A composition for lining the inner surface of a pipe such as a water pipe or a gas pipe, wherein the composition comprises a) 100 parts by weight of a bisphenol A type epoxy resin and a bisphenol F type epoxy resin b) a higher alcohol system Diluent 10-40 parts by weight c-1) Thixotropic agent whose main component is organic bentonite 5.0
~ 25 parts by weight c-2) Thixotropic agent containing finely divided silica as a main component 0.5 to 10
The composition for lining the inner surface of a pipe according to claim 7, which comprises a curing agent in an amount sufficient to cure part (d) a). 9. The component a) of the composition, wherein the mixing ratio of the bisphenol A type epoxy resin and the bisphenol F type epoxy resin is 100 parts by weight of the former and 10 to 60 of the latter.
The composition for lining the inner surface of the pipe according to claim 7, which is part by weight. 10. The pipe inner surface according to claim 7, wherein the component b) in the composition is a hydroxy compound in which a chain or alicyclic hydrocarbon having 6 or more carbon atoms is partially substituted with a hydroxyl group. Lining composition. 11. The mixing ratio of the thixotropic agent, c) of the composition, which is the main agent and auxiliary agent, of organic bentonite and finely divided silica powder, is 10 to 60 parts by weight based on 100 parts by weight of the former. The composition for lining an inner surface of a pipe according to claim 7. 12. The composition for lining an inner surface of a pipe according to claim 7, wherein the curing agent of d) in the composition is an aliphatic polyamine, an alicyclic polyamine, or both. 13. An existing pipe in which a supply pipe as a branch pipe is branched from a main pipe (conduit), wherein an opening is provided at a terminal side of the supply pipe, and a branch on the main pipe side from the opening. In order to line the inside of the pipe up to the section, the required amount of resin calculated from the relational conditions such as pipe length, pipe shape, and coating thickness to be formed is introduced into the pipe in the first step, and the total amount of resin is introduced. It is suitable for the repairing method in which the resin plug is transferred to a branching position on the side of the main pipeline and is applied to the inner surface of the pipe for lining while the resin plug is pulled back from the opening to the end side of the supply pipe by suction in the second step. A lining repairing method for a pipe inner surface, characterized in that a composition for lining the pipe inner surface comprises the following components. a) bisphenol A type epoxy resin and bisphenol F type epoxy resin b) higher alcohol diluent c) thixotropic agent consisting of organic bentonite and finely divided silica d) a) sufficient amount of a curing agent A composition for lining a pipe inner surface having a viscosity of 1,000 to 50,000 cp immediately after mixing and a thixotropic index range of 2.0 to 8.0 when the above components are mixed and used.