JPH0238529B2 - FUTEIKEIGAISOZAI - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an amorphous exterior material used for thermal insulation of chemical equipment, various types of piping, etc. Conventionally, when insulating chemical equipment and various types of piping, etc., it is usually done by pasting or wrapping an insulating material such as rock wool, and then wrapping it with a processed iron plate cover to protect it. However, sheet metal processing is expensive for the exterior steel plates of flanges, valves, pipe vents, heat exchanger plates, and other complex shapes.
After the exterior plate is damaged, it is often left unreplaced without being replenished. In addition, even though heat-retaining insulation is in place, there are cases where rainwater enters through the seams of the exterior panels, causing the insulation to become soaked and lose its heat-retaining effect. In order to cover such complex-shaped insulation construction areas, a castable type exterior material that is kneaded and formed by hand is considered. Conventional castable type exterior materials of this type contain large amounts of asbestos, which poses health problems when handled, and the molded material allows water to pass through, causing shrinkage cracks and flaking, resulting in poor handling and performance. There was a problem. In view of such conventional problems, the present inventors
As a result of various research, we succeeded in developing a material with good water resistance and no problems in handling. That is, the gist of the present invention is an amorphous exterior material characterized in that it is made by blending a thickener and a higher fatty acid metal salt into a compounding material mainly consisting of a hydraulic material and inorganic fibers. Hydraulic materials include Boltland cement,
A mixture of cement such as blast furnace cement and alumina cement, granulated cement slag powder, and gypsum is used. Rock wool, glass fiber, etc. are used as the inorganic fiber. In addition, it is also possible to add inert fillers such as silica sand and limestone sand, fibers such as pulp, synthetic fibers and natural fibers, and other pigments. Examples of thickeners include methylcellulose, carboxymethylcellulose, and polyethylene glycol. Examples of higher fatty acid metal salts include sodium stearate, potassium stearate, zinc stearate, sodium oleate, potassium oleate, and the like. The above-mentioned thickener has the effect of improving workability during troweling, increasing the adhesion of the material until it hardens, and preventing peeling. The amount is 0.5
A content of ~2% is preferable; if it is less than 0.5, the material will be dry, and if it exceeds 2%, the material will not be easily separated. In addition, higher fatty acid metal salts are effective in increasing the water repellency of the material after curing, but the amount is preferably 2 to 10%, less than 2% is less effective, and more than 10% reduces the strength after curing. This is not preferable because it reduces the In the present invention, by mixing the above materials and kneading them by adding an appropriate amount of water, it can be applied freely according to the shape of the object like a so-called plastering material, and after hardening, it is waterproof. It is possible to obtain a heat-insulating exterior material with good properties and no problems such as shrinkage cracks or peeling. If the area to be covered is large, spraying can be performed using a mortar lining gun or fireproof spraying machine. Furthermore, in the present invention, machine oil can be added in addition to the above-mentioned materials. Machine oil helps reduce water absorption, especially when co-existed with potassium stearate. This material does not contain any asbestos, so there are no health and hygiene problems, and it is sufficiently water resistant, so it can be used in areas where it is difficult to install sheet metal exterior panels, and in gaps and missing parts of exterior panels where water can enter and damage insulation. It can be used for repairing plumes. Furthermore, it has a low shrinkage rate, good adhesion to the base, and good water repellency, so it is an extremely useful material that can be applied freely as a building exterior material by troweling and spraying. Next, examples will be described. All percentages are by weight. Example 1 Rock wool 40%, Class A blast furnace cement 2.7%,
Granulated blast furnace slag powder 42.6%, anhydrous gypsum 10.7%,
A material consisting of 1% methyl cellulose and 3% zinc stearate was kneaded with 60% water and hardened. 2
After curing for a week, the cured product had a density of 0.97 g/cc, a bending strength of 25.9 Kg/cm ² , and a 1-hour water absorption rate of 35.8%. On the other hand, the material without zinc stearate had a high water absorption rate of 41%. In the above test, the 1-hour water absorption rate refers to the rate of water absorption after the cured product is immersed in water for 1 hour, and the bending strength refers to the bending strength of a cut piece of 4 x 16 cm and 1 cm thick. Example 2 Rock wool, Class A blast furnace cement, methyl cellulose, machine oil, and stearate were mixed in the proportions shown in Table 1, kneaded with 60% water, and troweled to form a 50 x 50 cm, 1 cm thick sheet. A board was made and cured indoors for two weeks. The density, bending strength, 1 hour water absorption rate, and water permeability of the cured product were measured. Water permeability was measured by spraying water at a rate of 2000 cm ² /day onto the specimen placed horizontally, and comparing the number of days until water penetrated the back surface and the specimen began to get wet. The test results are also shown in Table 1.

【table】

[Table] *Test number 6 indicates a comparative example.
As is clear from Table 1 above, the comparative example in which higher fatty acid metal salts were not added had a high water absorption rate, and
cm Under ² days of rainfall, water permeated to the back side in half a day. Furthermore, those containing zinc, potassium, and sodium salts of higher fatty acids showed water resistance that was sufficient for practical use, and took a long time to pass through the water. A combination of potassium stearate and machine oil was found to have a synergistic effect on water absorption. Example 3 Rock wool, Class A blast furnace cement, methyl cellulose, and potassium stearate were mixed in the proportions shown in Table 2, and water was added and kneaded to an appropriate consistency.
I made a board of 50 x 50 cm and 1 cm thick with a troweled finish.
It was cured indoors for two weeks. The density, bending strength, 1-hour water absorption rate, and water permeability of the cured product were measured. Water permeability was determined by the same method as in Example 2.

[Table] *Test number 3 indicates a comparative example.
As is clear from Table 2, when the amount of potassium stearate is replaced with rock wool, the water absorption rate decreases, but if it exceeds 10%, the strength decreases, which is not preferable. Example 4 The composition of Test No. 4 in Example 2 was sprayed with 100% water using a mortar lining gun onto a gypsum board measuring 3 by 6 meters to an average thickness of 7 cm, and cured indoors for 2 weeks. This cured product has a favorable surface pattern unique to sprayed materials, has good surface hardness, no shrinkage cracks, no peeling from the base material, and can be easily applied to the upper surface when placed diagonally.
Water was withdrawn at 2000mm/cm for ² days, but no water permeation to the back side of the base gypsum board was observed even after 30 days of continuous water repellency. In addition, the density of the hardened part excluding the gypsum board is 1 g/cc and the thermal conductivity is 0.18 Kcal/mhr.
℃, and some heat insulation function could be expected.

Claims (1)

[Scope of Claims] 1. An amorphous exterior material, characterized in that it is made by blending a thickener and a higher fatty acid metal salt into a compounding material mainly consisting of a hydraulic material and inorganic fibers. 2. The amorphous exterior material according to claim 1, wherein the amount of higher fatty acid metal salt is 2 to 10%. 3. The amorphous exterior material according to claim 1 or 2, wherein the amount of the thickener is 0.5 to 2%. 4. The amorphous exterior material according to claims 1 to 3, wherein the hydraulic material is cement. 5. The amorphous exterior material according to claims 1 to 3, wherein the hydraulic material is granulated slag powder, cement, or plaster.