JPH03290501A - Composite for filling embedded plug collar - Google Patents

Abstract

PURPOSE:To enable composing economically a composite of stable performance for filling an embedded plug collar by adding a water absorption material to one or more types selected from a group of a base oil, a thickening agent and an additive. CONSTITUTION:1.0 to 20.0 weight parts of a water absorption material are added to one or more types selected from a group of 88.0 to 30.0 weight parts of a base oil, 10.0 to 40.0 weight parts of a thickening agent and 1.0 to 10.0 weight parts of an additive, thereby composing a composite 1 for filling an embedded plug collar 2. According to the aforesaid construction, workability can be improved, and stable plug performance can be ensured all in respect of resin resistance, water stopping, corrosion resistance, non-water leakage and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composition for filling an embedding color (hereinafter simply referred to as a composition). More specifically, in order to prevent rust and corrosion, T-bolts and T-bolt holders are used to fix tie plates (fastening devices f) that fix rails on slab tracks such as Shinkansen trains to slabs. The present invention relates to a composition for filling an embedding collar that has a water-stopping effect and is injected into the body.

[Prior Art] As a fastening device for fixing a rail on a slab track, there is a tie plate equipped with parts for holding the rail, and a tie plate of this type, as described in Japanese Patent Application Laid-Open No. 54-113787. A commonly used configuration consists of a recessed collar, T-bolts, T-bolt receivers, etc. that secure the plate to the concrete slab.

FIG. 1 is a schematic sectional view showing a portion of the embedded collar of the fastening device. It also functions as a container for accommodating the embedded collar (2 is T-bolt C3) and T-bolt receiver (4) embedded in the slab. Non-embedded color (2)
A tie plate (6) is attached above the insulating collar (5) by T-bolts C3).

Conventionally, the remaining space other than the T-bolt (3) and T-bolt receiver (4) in the recessed collar (2) has been filled with, for example, a phthalate-based synthetic oil as a main component, and a rust preventive.
It is filled with a liquid water-stopping oil that has a higher density than water (for example, a density of 1.08 or more) containing additives such as antioxidants, thereby preventing rainwater etc. from entering the recessed collar (2). Invasion is eliminated by density difference, and the T-bolt (3) and T-bolt receiver (4) are rust-proofed.

As a specific example of the water stop oil, the former Japanese National Railway Standard JR
864099-7A-13BR2B, and is a known type of water stop oil containing additives and base oils such as phthalate esters, as described in JP-A-54-1137137 mentioned above. Waterproof oil can be used.

However, it has been experienced that the conventional water stop oil may cause the following problems when used in actual equipment.The first problem is that the conventional water stop oil has a low Because it is a viscous liquid, scales easily flow out from gaps that occur at the joint between the recessed collar and the bottom plate, or cracks that occur in the recessed collar itself. the result,
The water-stop oil fill level in the flush collar decreases, allowing water to accumulate in the upper part of the collar, which can lead to bolt corrosion.

The second problem is that the main component of the conventional water stop oil is phthalate ester, so when it comes into contact with the insulating collar made of polycarbonate resin attached to the T-port head, it cannot be easily washed away. It is to invade. As a result, there is a risk that the insulating collar will crack and the insulation effect will deteriorate, causing the signal current flowing through the rail to flow irregularly.Furthermore, the tightening strength of the T-bolts will decrease, causing the rail to remain fixed. There is also the risk of making the situation uncertain. Both of these are factors that impede safe train operation and may even cause major accidents.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems with the conventional water-stopping oil. ), the property that it does not flow out from gaps or cracks in the embedded collar (hereinafter referred to as non-runoff), and the property that rainwater that enters does not become emulsified or collect as a free liquid at the bottom of the embedded collar (hereinafter referred to as non-runoff). properties that prevent corrosion of T-bolts, etc. (hereinafter referred to as "corrosion resistance"), and properties that allow easy filling into the embedded collar (hereinafter referred to as "workability").
The purpose of the present invention is to provide a water-stopping filler that is excellent in both cases.

[Means for Solving the Three Problems] In order to overcome the two major drawbacks of conventional water stop oil, it is securely held within the embedded collar, completely protects the T-bolt from corrosion and rust, and prevents precipitation, We went back to the basics and considered ways to find a water-stopping filler that does not cause problems even when flooded, is more workable at a lower cost, and changed our way of thinking.As a result, we discovered that the solution could be solved by the following means.

That is, the present invention relates to a composition for filling an embedding color, which comprises one or more selected from the group consisting of a base oil, a thickener, and an additive, and a water-absorbing material.

In the composition of the present invention, as water-absorbing materials, base oils, thickeners, and additives, materials that are not likely to attack insulating collars or embedded collars, such as hydrophilic acrylic polymers, purified mineral oil, bentonite, etc. , metal soap, etc.
Each is used.

Therefore, the composition of the present invention has excellent resin resistance to insulating collars, embedded collars, and the like.

Furthermore, when the composition of the present invention is filled with water into an embedding collar, it swells and maintains a grease-like or jelly-like state rather than a liquid, and has the property of not flowing out through gaps or cracks in the embedding collar. . Therefore, it has no leakage property.

Furthermore, even when water infiltrates, such as rainwater or flooding, it is uniformly incorporated into the composition, and the non-spillability does not change.

Furthermore, it maintains sufficient anti-corrosion and anti-corrosion properties for a long time even when rainwater and water are absorbed.

Therefore, it has anti-corrosion properties.

Further, the composition of the present invention becomes fluid when mixed with water, and can be easily filled into an embeddable collar. Therefore, it has good workability.

[Example] Specific examples of water-absorbing materials used in the present invention include hydrophilic acrylic polymers (including acrylic acid-vinyl alcohol copolymers, etc.), cross-linked polyvinyl alcohol, cross-linked polyoxyethylene, and starch-based water-absorbing resins. , cellulose-based water absorbent resins, valves, and absorbent paper moulds. Among these, acrylic acid vinyl alcohol copolymer is preferred because it has extremely high water absorption capacity, is stable, and has good compatibility with base oil, thickener, and additives.

Specific examples of base oils used in the present invention include refined mineral oils, synthetic oils, animal and vegetable oils, and the like.

Among these, refined mineral oils and synthetic oils are preferred because they do not attack insulating collars, are compatible with water-absorbing materials, thickeners, and additives, and have good retention properties. Further, the viscosity of the base oil is preferably about 10 to 150 m1/s at 40°C.

Specific examples of the thickener used in the present invention include inorganic thickeners and organic thickeners. Among these, inorganic thickeners are preferred because they do not attack insulation collars, etc., do not reduce the water absorption ability of water-absorbing materials, are compatible with the water-absorbing material base oil and additives, and have good retention properties. .

The composition of the present invention contains a rust preventive agent, an antioxidant, etc. as additives. The composition of the present invention may further contain a suspending agent, a surfactant, and the like.

The preferred blending ratio in the composition of the present invention varies depending on the material used, but water-absorbing material = 1.0 to 20.0
Parts by weight, base oil: 8B, 0 to 30.0 parts by weight, thickener:
10.0 to 40.0 parts by weight, additive = 1.0 to 10.
0 parts by weight, and a more preferable blending ratio is 5.0 to 7.0 parts by weight of water-absorbing material, 54.0 to 30.0 parts by weight of base oil, and 27.0 to 33.0 parts by weight of thickener. ,Additive:
It is 5.0 to 6.0 parts by weight.

If it deviates from the above range, the water absorption capacity, workability, stability, and rust prevention properties of the product tend to decrease (specifically, the non-spillability, corrosion resistance, and workability decrease).

Such a composition is in a fluid state to a soft grease state in a state in which it absorbs almost no water.

As shown in FIG. 1, the composition (1) of the present invention is filled into an embedding collar ('2J) with water.

As mentioned above, in Figure 1, (3) is the T-bolt, (4) is the T-bolt receiver, and (5) is the insulating collar (6).
is a tie plate, (7) is a washer, and (8) is a pad.

After the composition (1) is filled with water into the embedding collar (2), it absorbs water and swells into a grease-like or jelly-like form, filling the space inside the embedding collar (2). As it fills up, the T-bolt (3) and T-bolt receiver (
4) Perform corrosion protection such as.

The composition of the present invention can be filled into an embeddable collar by, for example, mixing the composition with water at a ratio of about 1:10 and then injecting the composition into an embeddable collar. A method is used in which water is injected to about 1/10 of the volume of the space inside the embedding collar, and then additional water is injected to the top of the embedding collar.

In addition, as mentioned above, the composition of the present invention has, for example, about 10
After dilution with twice as much water, there is almost no increase in viscosity for a while, and the condition becomes greasy or jelly-like after about 3 hours of dilution, for example. Furthermore, even if the composition is placed in an embedding collar and then water is poured up to the top, the composition becomes grease-like or jelly-like after about 24 hours.

Furthermore, even if a cavity is created in the implantable collar for some reason, the composition of the present invention swells by absorbing rainwater, etc., and fills the cavity, so there is no need to replenish it. . In this way, the composition of the present invention has good workability and is easy to fill into an embedding collar, and after filling it has excellent resin resistance, non-spillability, water-stopping properties,
Stably exhibits anti-corrosion properties.

It was confirmed that these effects could be maintained up to a composition:water ratio of 1:20.

Example 1 10.0 parts by weight of acrylic acid-vinyl alcohol copolymer as a water-absorbing material and a viscosity of about 10 at 40°C as a base oil
Composed by mixing 58.0 parts by weight of 0+i/s refined mineral oil, 30.0 parts by weight of bentonite as a thickener, and 2.0 parts by weight of petroleum sulfonate metal salt as an additive for rust prevention effect. I got something.

The resulting composition was injected into an embedding collar together with about 10 times as much water, and its resin resistance, water-stopping properties, corrosion resistance, workability, and non-spillability were evaluated. The results are shown in Table 1.

Each of the above evaluations was performed as follows.

(2) Resin Resistance The extent to which the insulating collar was corroded was evaluated using the solvent stress cracking test method of the former Japanese National Railway Standard JR864099, 8A-13BR5Br water stop oil (prototype). The evaluation was based on the following two-level evaluation.

○: Pass (does not attack the insulating collar) ×: Fail (attacks the insulating collar) ■Water stop property The composition of the present invention absorbs water and stops water, whereas the conventional composition excludes water. The two have completely different water stopping mechanisms.Therefore, the water stopping properties are evaluated as shown below:
In the case of a comparative example (water stop property evaluation (2)) to be described later, different methods were used.

Water-stopping property evaluation (1) 10 ml of the sample solution was placed in a 100-ml cylinder with a stopper, 90 ml of tap water was poured onto it, the stopper was put on the cylinder, the cylinder was vigorously shaken up and down 10 times, and the water-stopping property was observed.

The criteria for water stop evaluation (1) are as follows.

○: Good (absorbs water and expands in volume, and does not suspend excess water) ×: Poor (not good if water separates or precipitates) Water stop property evaluation ('2J sample solution 50ml with a cap of ffi100ml) After pouring 50 ml of tap water onto the cylinder and sealing it with a stopper, the mixture was shaken vigorously up and down 10 times, and water-stopping properties were observed.

The criteria for water stop evaluation fsI2J are as follows.

○: Good (water always floats on the sample liquid due to density difference) ×: Poor (good if emulsification occurs or water does not separate) ■Corrosion resistance Regarding zinc and steel JIS K 224B, 5. It was evaluated using 28 methods.The evaluation was made in two stages: high and high.

○: Good (JR964099-8A-13BR5B
Must pass the standard value of ``Water stop oil'') ×: Defective (JR984099-8A-13BR5B
(failure to meet the standard value of ``Water stop oil'') ■ Workability Visually confirmed whether or not it flows sufficiently at room temperature. The evaluation was made in the following two stages.

○: Good (filling into the embedded collar is easy and can be done in a short time) X: Poor (filling into the embedded collar is difficult and takes a long time, or does not flow well unless heated) It was visually confirmed whether the mixture became grease-like or jelly-like after mixing with water.Evaluation was carried out in the following two stages.

○: Good (does not flow out from gaps in the embedded collar, etc.) ×: Poor (flows out from gaps in the embedded collar, etc.) Comparative Examples 1 to 4 For comparison, when refined mineral oil was used (Comparative Example 1),
In the case of a conventional water stop oil mainly composed of phthalate ester (Comparative Example 2), in the case of an improved type of water stop oil (high viscosity one mainly composed of bisphenol) (Comparative Example 3), and Water-stop grease (high-density synthetic oil hardened with a thickener)
The above-mentioned evaluation was also carried out for the case where (Comparative Example 4) was used. The results are shown in Table 1.

As is clear from Table 1, Example 1 according to the present invention
The composition shows excellent performance in all aspects of resin resistance, water stoppage, corrosion resistance, workability, and non-spillability.

On the other hand, Comparative Example 1 is a composition of refined mineral oil and has good resin resistance, but has insufficient performance in terms of non-spillability, water-stopping properties, and anti-corrosion properties.

Comparative Examples 2 and 3 are synthetic oil-based compositions with water-stopping properties,
Although the corrosion resistance is good, the performance is insufficient in resin resistance and non-spillability.

Comparative Example 4 is a grease composition that has good resin resistance, water-stopping properties, anti-corrosion properties, and non-spill properties, but is unsatisfactory in terms of workability.

[Effects of the Invention] The composition of the present invention has good workability either alone or in the form of a diluted solution with water. In addition, after being filled with water into an embedded collar, it swells into a grease-like or jelly-like state, and has resin resistance against insulating collars, waterproof performance against rainwater, corrosion resistance against T-bolts and T-bolt receivers, etc. It stably shows excellent performance in all respects, including resistance to spillage, such as cracks in the impregnated collar. Furthermore, the compositions of the present invention are economically produced. That is, the present invention provides a composition that has excellent performance, is easy to handle, and is economical.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing the embedded collar portion of the rail fastening device for slab track. (Drawing codes) (1): Filling composition (3: embedding collar f3): T-bolt (4): T-bolt receiver (5): Insulating collar (6), tie plate (sword: washer (8) : Bad

Claims (1)

[Scope of Claims] 1. A composition for filling an embedding collar, which comprises one or more selected from the group consisting of a base oil, a thickener, and an additive, and a water-absorbing material. 2. A claim in which the water-absorbing material is one or more selected from the group consisting of hydrophilic acrylic polymer, cross-linked polyvinyl alcohol, cross-linked polyoxyethylene, starch-based, water-based resin, cellulose-based water-absorbing resin, valve, and blotting paper. Item 1. The composition according to item 1. 3. The composition according to claim 1 or 2, wherein the base oil is one or more selected from the group consisting of refined mineral oil, synthetic oil, and animal and vegetable oil. 4. The composition according to claim 1, 2 or 3, wherein the thickener is an inorganic thickener. 5. The composition according to claim 1, 2, 3 or 4, wherein the additive comprises a rust inhibitor. 6 1.0 to 20.0 parts by weight of water-absorbing material and 88.0 parts by weight of base oil.
6. The composition according to claim 1, comprising 0 to 30.0 parts by weight, 10.0 to 40.0 parts by weight of a thickener, and 1.0 to 10.0 parts by weight of an additive. Composition.