JP2007138462A - Joint treatment material for substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint treatment material for a substrate which enhances working efficiency by eliminating the problem of reduction in thickness, and enables a worker to perform work in a safe environment. <P>SOLUTION: In this joint treatment material for the substrate, at least one among a filler, an adhesiveness-imparting agent, a viscosity modifier, a setting modifier and a coloring agent is mixed into gypsum, and an inorganic hollow balloon with a grain size of 50-150 μm, and an organic hollow balloon with a grain size of 5-30 μm are also mixed therein. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is for groundwork for filling joints formed between adjacent base materials and processing the joints to the same height as the surface of the base material in interior work such as an inner wall or ceiling of a building. The present invention relates to a joint treatment material.

  Conventionally, in interior construction of buildings, a plurality of base materials such as gypsum board, veneer plywood, calcium silicate board, etc. are arranged on the part that forms the wall or ceiling, and the joint part formed between these base materials Fill with joint material. Then, it is known that after curing and drying the foundation joint treatment material, the joint part is polished and smoothed with sandpaper, and a wall is pasted thereon to finish a wall or ceiling.

  As the joint treatment material, a paste obtained by mixing a filler such as gypsum or calcium carbonate with an adhesion-imparting agent such as an emulsion resin and other additives and water, and kneading them into a paste is widely used.

  However, in the case of such joint treatment materials, meat thinning occurs at the time of drying.After drying, the joint treatment material is again placed on the thinned portion of the meat, cured, and dried repeatedly. Since it had to be the same height as the surface of the base material, it took time and labor, and there was a problem in terms of workability.

  For this reason, a joint treatment material with less flesh has been proposed, in which a lightweight aggregate containing air such as a hollow balloon or pearlite is mixed in the joint treatment material. -40277) as a main component, inorganic fillers such as gypsum and calcium carbonate, lightweight fillers selected from the group including hollow balloons, perlites, hiruishi, and water-soluble emulsion resins. Background preparation agents are known in which water is mixed into a liquid fixing agent and kneaded.

JP2001-40277

The substrate conditioner disclosed in Patent Document 1 is used for filling the joint portion of the base material in the same manner as in the present invention so that the joint portion becomes a smooth surface having the same height as the base material.
It is said that the inorganic filler mixed in the base preparation agent is selected from the group including gypsum and calcium carbonate, but in this case, a material that hardly reacts with water such as calcium carbonate may be used. This means that this base conditioner is not intended to reduce the thinness of the meat by utilizing the growth of crystals due to the hydration reaction of gypsum and the like.

  And when the water which intervenes between the particle | grains of a filler evaporates at the time of drying with respect to the volume of the said calcium carbonate which knead | mixed by adding water, the clearance gap between particles will be clogged and a bulk will reduce. Therefore, a filler such as calcium carbonate is one of the causes of meat thinning.

  In addition, a light filler having a particle size of 10 to 150 μm selected from the group including a hollow balloon, pearlite, and leechite is mixed in the base preparation agent. Among these light fillers, an example of a hollow balloon is included. The shirasu balloons mentioned above are made by burning and foaming volcanic ash at a high temperature to form a hollow shape. In the production process of this shirasu balloon, the most common ones have a particle size of around 80-100 μm, and fine particles of 50 μm or less There are few things with a small particle size. This is because when a firing temperature suitable for manufacturing a hollow balloon of around 80 to 100 μm is set, the shirasu with a fine particle size bursts due to the firing temperature being too high, and the proportion formed as a hollow balloon is high. Because there are few.

  Then, for example, when a shirasu balloon mainly composed of particles of about 80 to 100 μm is used as the base conditioner, the gaps between the particles become larger overall, and the moisture intervening in the gaps evaporates. The gap is clogged and the bulk is reduced. Therefore, even in the case of a lightweight filler, if a hollow balloon in the range of 10 to 150 μm is randomly mixed, it may cause thinning of the meat.

  On the other hand, since the adhesion-imparting agent is in a liquid state, moisture evaporates and condenses during the drying process, which is one of the causes of thinning of the meat. In addition, since the viscosity-imparting agent increases in viscosity with the evaporation of moisture and tends to attract other fillers when condensed, it may accelerate skin thinning in some cases.

  From the above, the inorganic filler, the hollow balloon, and the emulsion resin in the ground preparation of Patent Document 1 can cause thinning of the meat, respectively. Even though it was said that there was less meat thinning, it could not be denied that meat thinning occurred.

  Therefore, even in the case of this base preparation agent, after filling the joint portion, curing and drying, the base preparation agent is again placed on the thinned portion of the meat to make the joint portion a smooth surface having the same height as the base material. Since the work has to be performed, it takes time and labor to smooth the thinned portion, and the work efficiency is not good.

  In addition, assuming the amount to be thinned in advance, if the base preparation agent is placed higher than the surface of the base material, and after drying the base preparation agent, the joints are polished with sandpaper to the same height as the base material. In this case, since the base conditioner filled in the joint becomes thicker, the drying time becomes longer. In addition, the amount of polishing work with sandpaper increases by the amount of the sheet placed high, and the base preparation agent is wasted, so that there is a problem that work efficiency and economy are not good.

  Furthermore, if the surface of the dried base preparation agent is polished with sandpaper, the filler and emulsion powder mixed in the base preparation agent will be scattered in the air, which may impair the health of the operator. There was a problem that there was.

  The present invention relates to a base joint treatment material for filling a joint portion of a base material for forming an inner wall, a ceiling, and the like, and smoothing the joint portion, in order to solve the above-described problems. In addition, the object of the present invention is to provide a ground joint treatment material that enables the worker to work in a safe environment while solving the problem of skin thinning and improving work efficiency.

  The ground joint treatment material according to the present invention includes, as a specific means for that purpose, gypsum mixed with one or more of a filler, an adhesion-imparting agent, a viscosity modifier, a setting modifier, and a colorant, Furthermore, an inorganic hollow balloon having a particle size of 50 to 150 μm and an organic hollow balloon having a particle size of 5 to 30 μm are mixed.

  The gypsum is preferably α-type hemihydrate gypsum having a particle size of 297 μm or less.

  The mixing amount of the inorganic hollow balloon is preferably 10 to 15% by weight, and the mixing amount of the organic hollow balloon is preferably 5 to 10% by weight.

  The joint material for groundwork of the present invention is made by mixing a filler, an inorganic hollow balloon having a particle size of 50 to 150 μm, and an organic hollow balloon having a particle size of 5 to 30 μm, and further adhering to this mixture. By adding an imparting agent and water and kneading, an organic hollow balloon having a particle diameter smaller than that of the filler and the inorganic hollow balloon enters the gap between the filler and the inorganic hollow balloon. In addition, gypsum in the hydration process enters between the hollow balloons to grow needle-like crystals and become intertwined with the filler and the hollow balloon.

  The filler, the inorganic hollow balloon, the organic hollow balloon, and the gypsum are intertwined to support each other, so that even if moisture evaporates, the flesh thinning that causes a problem in operation does not occur. Therefore, the work for filling the joint portion with the joint treatment material can be performed only once, and the work efficiency is extremely good.

  In addition, since there is no problem of skin thinning, if the joint treatment material for the base is cured to the extent that it does not leave a mark when pressed with a finger, the protruding portion of the joint treatment material is scraped off with a hammer or the like before drying. Since the surface can be smoothed by squeezing, the working time can be greatly shortened compared to the work of drying and then smoothing by sandpaper.

  Further, since the pieces of joint treatment material that have been scraped off contain moisture, they fall without being scattered in the air, so that the worker can work in a safe environment.

  The ground joint treatment material of the present invention is mixed with one or more of filler, adhesion-imparting agent, viscosity modifier, setting modifier, and colorant in gypsum, and further has a particle size of 50 to 150 μm. An inorganic hollow balloon and an organic hollow balloon having a particle size of 5 to 30 μm are mixed.

  The gypsum is preferably α-type hemihydrate gypsum with a particle size of 297 μm or less, and α-type hemihydrate gypsum has a crystal structure that is smaller than β-type hemihydrate gypsum, so that the amount of mixed water is small. Therefore, it will be harder to lose weight. Note that when the particle size of the gypsum exceeds 297 μm, the kneading width becomes narrower, and the surface hardness and adhesiveness decrease.

Examples of inorganic hollow balloons include shirasu balloons, silica balloons, and glass balloons, which are obtained by firing volcanic ash, fly ash, and glass fine particles at high temperatures, respectively. And these inorganic type hollow balloons with a particle size of 50-150 micrometers are mixed in the range of 10-15 weight%.
It should be noted that this inorganic hollow balloon tends to be thin when the particle size is out of the range of 50 to 150 μm, and when the mixing amount exceeds 15% by weight, the amount of mixed water increases and the strength increases. descend.

The organic hollow balloon is a hollow balloon formed by applying heat while dispersing industrially produced acrylic resin powder in the air, and a particle size of 5-30 μm is 5-10. It is mixed in the range of wt%.
In the case of this organic hollow balloon, when the mixing amount exceeds 10% by weight, a decrease in strength is observed.

  The filler is calcium carbonate or stone powder having a particle size of 150 μm or less. By mixing this filler, the mass of the joint treatment material is increased and the kneadability and elongation at the time of filling are improved. The surface properties after smoothing are also improved.

  Adhesion-imparting agent is one or more of vinyl acetate, polyvinyl alcohol, vinyl acetate-modified copolymer, acrylic-modified copolymer, etc., which are set together with drying joint material, plaster, filling Reinforces the state in which the material and the hollow balloon are entangled and supported with each other.

  The viscosity modifier is carboxymethylcellulose or methylcellulose (MC), which makes the mixing state of gypsum and filler with relatively high specific gravity and a hollow balloon with relatively low specific gravity uniform and does not separate over time. It is for doing so.

  The setting modifier is a protein-based adjusting agent such as citrates or glue, gelatin, and the like, and is mixed in an appropriate amount according to the schedule of the work, etc., to delay the setting time of gypsum.

  Then, by adding water to the mixture of each material and kneading, a fine organic hollow balloon enters the gap formed between the filler and the inorganic hollow balloon, and the filler and the inorganic Supporting the hollow balloon, gypsum enters the gap between the filler and each hollow balloon while dissolving in water, and grows crystals in a needle shape between the filler, inorganic hollow balloon and organic hollow balloon, The filler, the inorganic hollow balloon, the organic hollow balloon and the gypsum are intertwined.

  When the joint material for base material thus obtained is filled in the joint part and cured, the water contained in the gypsum, the viscosity modifier and the coagulation regulator evaporates. At that time, the filler, the inorganic hollow balloon and the organic matter are evaporated. Since the gypsum crystallized in the needle shape is entangled with the system hollow balloon and supports each other, the skin thinning that causes a problem in work does not occur.

  Therefore, since the joint material for groundwork does not have a problem of skin thinning, the work for filling the joint portion is only required once, so that the work efficiency is extremely good. Also, if the joint treatment material for the base is cured to the extent that it does not leave a mark even when pressed with a finger, the protruding portion of the joint treatment material is scraped off with a metal spatula or the surface is smoothed before drying. Since so-called kelen can be applied to the surface, the working time can be greatly shortened compared to the operation of drying and then smoothing with sandpaper.

  Moreover, since the fragment of the joint treatment material scraped off by keren contains moisture, it falls without being scattered in the air, so that the worker can work in a safe environment.

Hereinafter, preferred embodiments of the present invention will be described. FIG. 1 is a table (Table-1) showing an example of a joint material for base.
In Examples A to I in Table 1, the mixing amount of the inorganic hollow balloon mixed in the joint material for base is 10, 12.5, 15 (% by weight), and mixing of the organic hollow balloon is performed. Nine blending ratios when the amount is 5, 7.5, and 10 (% by weight), and the numerical value of each material is the blending amount (g) when 200 g of the ground joint treatment material is adjusted. is there.

  The gypsum is α-type hemihydrate gypsum, and other materials include inorganic hollow balloons as shirasu balloons, organic hollow balloons as acrylic resin hollow balloons, fillers as calcium carbonate, and adhesion-imparting agents as acrylic-modified copolymers. The product (acrylic resin emulsion), the viscosity modifier was methylcellulose (MC), the setting modifier was citrates, and the colorant was iron oxide pigment.

  FIG. 2 is a chart (Table-2) showing a comparative example with respect to the examples of Table-1, and Comparative Examples J and K of Table-2 are conventionally known in which vermlite and granular pearlite are mixed as a lightweight filler. It is a mixing ratio of the joint treatment material. L and M are blending ratios when no organic hollow balloon is mixed, and N is a blending ratio when no inorganic hollow balloon is mixed.

  In Table 2, O to R indicate that the mixing amount of the inorganic hollow balloon and the organic hollow balloon is within the range of the mixing amount of the ground joint treatment material of the present invention (the inorganic hollow balloon is 10 to 15% by weight, organic The system hollow balloon is from 5 to 10% by weight).

  FIG. 3 is also a chart (Table-3) showing a comparative example with respect to the examples in Table-1, and S to X in Table-3 are the particle diameters of the inorganic hollow balloon and the organic hollow balloon of the present invention. It is a mixture ratio that is out of the range of the particle size of the hollow balloon of the joint treatment material for base (inorganic hollow balloon is 50 to 150 μm, organic hollow balloon is 5 to 30 μm).

  FIG. 4 is a table (Table 4) showing the test results of Examples A to I in Table 1. The amount of mixed water, workability, setting time, keren property, surface property, hardness is shown in Table 4. The results were listed for each item of skin thinness and adhesiveness.

  And as this Table-4 shows, as for Example A-I, as for all, the result that the frequency | count which fills the joint part with the joint material for base | substrate in a joint thinning part test | inspection is sufficient once. I came out. That is, there is no need for the filling operation to be performed multiple times because there is no flesh thinning that causes a problem in operation, and the ground joint treatment materials (Examples A to I) according to the present invention are It shows that the joint material for base is efficient.

  In particular, Examples C, E, and G were satisfactory joint treatment materials for the ground, with satisfactory results obtained in all items. In addition, Examples A, B, D, F, H, and I did not reach Examples C, E, and G in terms of kelen property, surface property, and adhesiveness, respectively. There is no such thing.

FIG. 5 is a table (Table-5) showing the test results of Comparative Examples J to R in Table-2. Among Comparative Examples J to R in Table-5, P and Q are meat thinning properties. In this test, although the number of times of filling the ground joint treatment material was a good result, the workability and surface property were not as good as those of Examples C, E, and G.
Note that P and Q are blending ratios in which the mixing amount of the inorganic hollow balloon and the organic hollow balloon is out of the range of the mixing amount of the ground joint treatment material of the present invention. It was common to Examples C, E, and G in that the sum of the system hollow balloons was 40 g (20%).

  Further, L to N are not mixed with an inorganic hollow balloon or an organic hollow balloon, O is a mixed amount of both hollow balloons, and R is a mixed amount of both hollow balloons. In both cases, the result was that the skin was thinned and the joint material was filled twice.

  Furthermore, J and K are not hollow balloons but are mixed with vermlite and granular pearlite, but the meat is thin and the filling of the joint treatment material is performed three times. In addition, workability, keren and surface properties were poor.

  FIG. 6 is a table (Table-6) showing the test results of Comparative Examples S to X in Table-3. Comparative Examples S to U in Table-6 are the results of inorganic hollow balloons and organic hollow balloons. This is a case where the particle diameter is too small, and the thinning of the meat occurs and the joint material is filled twice. In addition, workability, keren and surface properties were not so good. In addition, Comparative Examples V to X are cases where the inorganic hollow organic balloon and the organic hollow balloon have too large particle diameters, and the workability, the swellability, and the surface property are very good. Is filled twice.

Each item was tested according to the following criteria.
The “mixed water amount” is the amount (%) of water used for kneading 200 g of the composition for ground joint material.

“Workability” represents the degree of difficulty when filling the joint material for base into the joint part of the bevel gypsum board.
◎ is very good ○ is good △ is slightly bad × is bad

  The “setting time” was in accordance with the setting test method for gypsum plaster of JIS A6904.

“Kellen” represents the degree of difficulty when filling a joint material for groundwork into a joint part of a bevel gypsum board and scraping with a spatula after 2 hours.
◎ is very easy ○ is easy △ is slightly heavy × is heavy

“Surface property” is the surface condition of the joint after keren.
◎ is very smooth ○ is smooth △ is slightly uneven × is more uneven

  “Hardness” was measured with a scratch hardness tester after applying a joint material for groundwork on a gypsum board to a thickness of 2 mm, drying.

  “Meat thinness” is a method of filling the joint part of the bevel gypsum board with the foundation joint treatment material, and performing the cleansing after 2 hours, and the joint joint treatment material for the foundation part is arranged until the joint part becomes smooth. Number of times.

  The “adhesive” “underlying material” was in accordance with the test method for joint treatment material for gypsum board of JIS A6914.

“Adhesive” putty for anti-finishing is to apply a joint material for foundation to a thickness of about 1 mm on a gypsum board and dry, and then apply a finishing putty to this to a thickness of 0.5 mm. After applying and drying, 30 minutes after pasting the wallpaper, the amount of the ground joint treatment material adhering to the back surface of the wallpaper when the wallpaper is peeled off is observed.
◎ is 0%
○ is less than 30% △ is 30 to 50%
X is 50% or more

It is a chart which shows the mixture ratio of the Example of this invention. It is a chart which shows the mixture ratio of a comparative example. It is a chart which shows the mixture ratio of a comparative example. It is a graph which shows the test result of the Example of this invention. It is a graph which shows the test result of a comparative example. It is a graph which shows the test result of a comparative example.

Claims (3)

  In the gypsum, one or more of a filler, an adhesion-imparting agent, a viscosity modifier, a coagulation modifier, and a colorant are mixed, an inorganic hollow balloon having a particle size of 50 to 150 μm, and a particle size of 5 A joint material for groundwork, which is mixed with an organic hollow balloon of ˜30 μm.   The joint material for base material according to claim 1, wherein the gypsum is α-type hemihydrate gypsum having a particle size of 297 μm or less.   The ground joint treatment material according to claim 1 or 2, wherein the mixing amount of the inorganic hollow balloon is 10 to 15% by weight and the mixing amount of the organic hollow balloon is 5 to 10% by weight.

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