JPS5844823B2 - Joint treatment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating gaps, so-called joints, when panel materials such as decorative boards and base boards are stretched on walls and other surfaces of buildings.

Traditionally, this type of joint treatment method uses a joint material made of open-cell foam impregnated with asphalt, etc.
A method is known in which this material is press-fitted into the joint gaps of panel materials, but this method requires compression and insertion, is time-consuming, and has the disadvantage that it is difficult to bond to concrete surfaces. Another drawback is that the asphalt oozes out because the joint material is pressed in to achieve airtightness.

It is also known to use a paste-like material such as -4-kf Ocol, butyl rubber, or silicone as a joint material, but in this case, the material deteriorates over time and has the disadvantage of causing cracks.

Furthermore, as another joint treatment method, a hard urethane-based foamable resin stock solution is injected or applied with a brush into the joint gaps of the panel material, and the resin is foamed and cured.

However, when carrying out an injection treatment method using a two-component mixture of polyol and diisocyanate, which is cheaper than a liquid-based resin solution, as the resin stock solution, a cylinder button and an injection device are required to store the stock solution. Moreover, the high pressure inside the cylinder makes it difficult to work with, and once the cylinder is opened, it must be used up, and special pulp is required to eliminate this.

Particularly in the case of vertical joints, after injection of the resin stock solution into the joint gap, foaming occurs and the resin solution drips for several minutes until it hardens.
The amount of foam filling is insufficient or the filling density is different between the upper and lower parts of the joint.

Furthermore, when applying the resin stock solution with a brush, it does not enter the joint gaps well, resulting in poor workability and a large amount of waste, and the resin stock solution also sag.

The present invention was invented to eliminate the drawbacks of the conventional joint treatment methods described above.In particular, when two components of polyol and diisocyanate are mixed, foaming and curing begin in a relatively short period of time. In view of the fact that it is difficult to perform joint treatment using a foaming resin stock solution, polyol and diincyanate are impregnated into separate string-like materials, and both are charged into the joint gap and the two liquids are By being able to carry out contact mixing and filtration, joint treatment can be carried out easily and efficiently without waste.

Next, embodiments of the present invention will be described with reference to the drawings.

To obtain a rigid polyurethane foam using a two-component mixing method, two portions of undiluted polyol and diincyanate are prepared in separate porous and flexible string-like materials 1a and 1b, respectively.
Keep it impregnated.

If an ethylenediamine-based or diethylenetriamine-based polyol is used, the reaction time will be longer than usual, which is convenient for the construction work described below.

This impregnation work may be carried out at the construction site by immersing the string-like material in the stock solution, but it is also possible to impregnate the string-like material with the stock solution in advance and then transporting the string-like material to the construction site.

Additionally, additives such as catalysts and blowing agents are mixed into the polyol solution in advance.

Further, as a blowing agent, trichloromonofluoromethane or the like is used.

Then, as described above, both the polyol-impregnated string material Ia and the diisocyanate-impregnated string material Ib are inserted into the joint gap 3 of the panel materials 2, 2 stretched over wall reinforcements or the like.

At this time, both string-like objects IapIbffi may be placed in a connected state and charged at once, or they may be placed side by side or placed in order from one side, as long as they can be brought into close contact with each other within the joint gap 3. .

By bringing the strings Ia and Ibk into close contact with each other in this way, the polyol and diisocyanate impregnated in each of them are brought into contact and mixed, foaming and curing, and the joint gap 3 is formed into a rigid polyurethane that is integrated with the strings. It is filled with foam 4.

In particular, when inserting both strings Ia and Ib into the joint gap 3, by twisting them appropriately, the contact area between the two is increased (and the respective impregnating liquids seep out to the surface, and both liquids are twisted together). It is desirable to improve contact mixing of (polyol, diisocyanate).

However, in the case of vertical joints, if the amount of liquid that oozes increases, there is a risk of sagging, so consider the timing of charging into the joint gap 3, the number of times of twisting, etc.

During the above construction, if the temperature is low, after the string-like material has been inserted, it may be heated with a dryer or the like to promote foaming and curing.

In addition, if there is a risk that the polyurethane foam will expand excessively from the joint gap to the surface side due to excessive foaming, place a plate material on the surface side of the joint gap after inserting the string to press down the polyurethane foam. It's good to do that.

In addition, the string-like material I a +I used for carrying out the above-mentioned present invention
b may be made of a flexible material that is porous and capable of impregnating and retaining the undiluted solution, such as a long piece of open-celled synthetic resin foam or a string made of fibers such as hemp or cotton;
Use a string-like material whose thickness corresponds to the width, depth, etc. of the joint gap 3.

As the synthetic resin foam used for the string 1, flexible polyurethane foam, polyvinyl chloride, rubber foam, etc. can be used.

In particular, when the string-like material itself is elastic, such as synthetic resin foam, when inserting both string-like materials impregnated with the stock solution into the joint gap, the width, depth, etc. of the joint gap must be adjusted. By adjusting the expansion and contraction of the string-like body accordingly, the amount of stock solution per unit length and the amount of foam filling can be adjusted.

A construction test example using the joint treatment method of the present invention as described above will be shown below.

[■] When treatment was carried out at a joint with a joint gap of 5m7IL using twine twine as two string-like materials,
The amount of resin stock solution used was 20 to 30 g/m, and the airtightness after construction was good.

[■] Using soft polyurethane foam as two string-like materials, treatment was carried out at vertical joints with a joint gap of 5rn7IL, and the amount of resin stock solution used was 25 to 3.
At 5 g/m, the airtightness after construction was good.

As described above, according to the method of the present invention, in order to obtain a rigid polyurethane foam using a two-component mixing method, two component stock solutions, that is, polyol and diincyanate, are impregnated into separate string-like materials. These two liquids are placed in the joint gap of the panel material, for example, by fitting them properly, and the two liquids are brought into contact and mixed to cause foaming and hardening. Therefore, when the two liquids are brought into contact and mixed, foaming is completed in 6 to 10 minutes. Until the above-mentioned liquids are charged into the joint gap, they are handled separately and there is no risk of reactions such as foaming and hardening occurring.

Therefore, strings impregnated with polyol or diisocyanate can be left for a long time to dry. For example, the number of strings required for joint treatment can be soaked in each solution in advance. It is possible to arbitrarily take out both string-like materials and insert them into the joint gap as described above.

In addition, the remaining stock solution can be used as long as the reaction does not start, so there is no waste, and there is no need to measure and mix the necessary amount for each processing operation, unlike when using a resin stock solution that is a mixture of the two liquids mentioned above. Efficiency of processing work is planned.

Moreover, since the two types of stock solutions are impregnated and held in string-like objects, even in vertical joints, the stock solutions may droop excessively after being charged into the joint gap and before foaming and curing are completed. It is possible to perform joint treatment with uniform filling density over the entire joint and sufficient airtightness without any sharpness.

Furthermore, since the present invention impregnates a shaped string-like object with two types of stock solutions, it is easy to handle and insert into the joint gap, and special cylinders and injection equipment as in the case of the injection method are not required. Not only is it unnecessary, but there is also less processing loss as in the case of the brush coating method.

Therefore, the present invention contributes to improving the workability and reducing the cost of joint treatment using a rigid polyurethane foam formed on-site.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a part in progress showing an implementation row of the present invention, FIG. 2 is a perspective view of a part in progress showing another embodiment,
FIG. 3 is a perspective view of a portion of the building upon completion of construction. 1a... String-like material impregnated with polyol, 1b.
...String material impregnated with diisocyanate, 2.2
... Panel material, 3 ... Joint gap, 4.
...Hard polyurethane foam.

Claims (1)

[Claims] 1. The method is characterized in that polyol and diisocyanate are impregnated into separate string-like materials and buttoned, and both are charged into the joint gap and the two liquids are brought into contact and mixed to foam and harden. Joint treatment method. 2. The joint treatment method according to claim 1, wherein the string-like material is made of a porous and flexible material. 3. The joint treatment method according to claim 1 or 2, wherein the string-like material is made of a synthetic resin foam having open cells. 4. The joint treatment method according to claim 1 or 2, wherein the string-like material is made of linen, cotton, or other fibers that have water absorption properties. 5 Claims 1 and 2, characterized in that when both string-like materials are inserted into the joint gap, they are completely twisted together.
The joint treatment method described in Section 3, Section 3, or Section 4.