JPS6177687A - High refractory properties composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a composition with excellent fire resistance.

Substances with excellent fire resistance have been widely used in various fields where fire resistance is required.

In particular, when used for architectural purposes, the following properties are required as a fireproof coating material.

10 Must be nonflammable.

(2) It has heat insulation properties when heated, and the temperature of the back surface of the applied composition is kept below a certain standard.

(3) It must be heat resistant.

(4) It must be flame resistant.

(5) Must be resistant to hot water.

(6) Must have impact resistance.

etc. Furthermore, additional factors include reducing the thickness or weight of the fire-resistant coating, ensuring that the hardened coating layer has good weather resistance so that it can withstand harsh outdoor climatic conditions when used as a coating for plants, etc., and that it has good adhesion to the target substrate. It is required to be good and have a certain degree of cosmetic properties. However,
The inventors of the present invention have repeatedly stated that conventional spray-on fire-resistant V1 covering materials made of rock wool fibers and spray-on fire-resistant coating materials made of vermiculite do not meet this objective.

The present inventors have been researching compositions with excellent fire-resistant performance, including fire-resistant coating materials with the above-mentioned properties, for quite some time, and have already completed several useful inventions. Most of them have water-soluble alkali metal silicate, its hardening agent, foaming agent, and foaming stabilizer as essential components, and these component systems may be used alone or in addition to silica dust, gypsum, or substances with a high degree of hydration. After blending or adding special fine powder to form a paste, a coating layer is formed by any coating method. On the other hand, the present inventor continued to study the above-mentioned component system without using a self-foaming agent, and also succeeded in inventing some useful compositions. However, even if a strong cured coating layer can be formed with the above-mentioned composition having excellent fire resistance, some problems still remain. [III,
Problems with workability due to the use of water-soluble alkali gold silicates with high alkalinity, problems with weather resistance that make it difficult to use externally, and poor cosmetic properties because the coating layer is quite alkaline. There were problems, such as the problem that the weight of the covering layer becomes considerably large, the problem that the thickness of the covering layer becomes considerably large in the case of a foamed covering layer, and the risk of non-uniformity of foaming due to poor workmanship.

An object of the present invention is to provide a composition with excellent fire performance, which meets all the requirements particularly for a fire-resistant coating.

Another object of the present invention is to provide a composition with excellent fire resistance, which allows for safer workability, improved cosmetic properties, improved weather resistance, and reduced weight of hardened ff1P.

Another object of the present invention is to provide a composition that is nonflammable, has extremely good heat insulation properties under high temperatures, and has excellent fire resistance.

Another feature of the present invention is to provide a composition with excellent fire resistance properties such as heat resistance, flame resistance, impact resistance, and hot water resistance.

The above object of the present invention is to achieve a composition containing hydraulic cement, lightweight aggregate, and a highly hydrated substance as active ingredients in a specific range, especially when used for fireproof coating of buildings. It exhibits extremely excellent fire resistance performance1).

The research conducted by the present inventors has revealed the following. In other words, by blending a considerable amount of a material with a high degree of hydration into hydraulic cement, it exhibits considerable fire resistance, and by further blending a specific amount of lightweight aggregate with this, the fire resistance is further improved. This means that it has become possible to meet almost all the requirements for a fire-resistant coating material.

The substance with a high degree of hydration used in the present invention is a substance that has never been used in a considerably large amount in a composition with excellent fire resistance, except for the present inventors (i.e.,
This substance has been used as a component of this type of composition (approximately 20% when using a water-soluble alkali metal silicate as a binder, and approximately 30% when using hydraulic cement as a binder). One of the major features of the present invention lies in its use with lightweight aggregate. Therefore, the degree of hydration refers to the extent to which an object heated at 100°C releases a larger amount of water when heated to a higher temperature, and the substance with a high degree of hydration in the present invention What is 10
1 part of 100ff is set at constant temperature of 0℃, heated to 600℃~
Approximately 15 jr 1 copy or more of them! ++IB2 water,
IX SMALL 'J' LE IM IT LIE').

The form of water contained in the substance includes adsorbed water as well as quartz water, and is also generally referred to as a hydrate of the substance.

Examples of substances with a high degree of hydration include the following substances.

(1) Specific examples of hydrated aluminum oxide substances: aluminum hydroxide, gibbsite mineral, boehmite, diaspore, etc. (2) Specific examples of zeolite substances: chabazite, hyurandite, mordenite, etc. (3) Specific examples of silica-alumina substances fF1: Allophane, halloysite, non-1M expanded vermiculite, etc. (4) Specific examples of magnenoir-based substances, such as nibblesite, attapulgite, etc. (5) Other specific examples: Sachin white, etlintuyaite, etc. can be exemplified.

Among these substances with a high degree of hydration, the hydrated substance of γruniuno oxide exhibits the best properties in various fire resistance I11' tests, although the reason for this is not clear, so it can be said to be desirable. . Alkaline earth metal hydroxides such as dolomite plaster and calcium hydroxide are also substances with a high degree of hydration; Since it is not sufficient in terms of sex, etc., it can only be used in small amounts as an auxiliary ingredient.

Next, the hydraulic cement used in the present invention includes single cement such as Portland cement and alumina cement,
Commonly known cements include mixed cements such as lime mixed cement, blast furnace cement, silica cement, flyfunoyu cement, masonry cement, and high sulfate slag cement.

Further, the light aggregate used in the present invention refers to expanded pearlite, expanded shale, which is a foamed or expanded natural mineral material.
In addition to expanded vermiculite, pumice, shirasu balloons, etc.
5 silica gel? ! Foamed products, foamed products made by granulating various types of slanog, foamed products made by granulating glass waste,
Contains artificial lightweight aggregates such as those made by granulating and foaming clay powder. Among these, it is preferable that the expanded or foamed substance has not undergone much "vitrification" in crystal terms and has a small bulk specific gravity, and pumice, expanded vermiculite, and clay foam are preferable. More preferred is expanded vermiculite because of its ease of availability and superior AM properties. Based on experimental results, it is preferable to use expanded perlite, plus balloons, etc. in combination with expanded vermiculite in a bulk-added form.

The composition with excellent fire resistance of the present invention contains the above-mentioned three essential components, and the proportions of these components are as follows.

Hydraulic cement 100 parts by weight lightweight aggregate
2O-300ff 1 part Material with high degree of hydration 50 to 600 parts by weight Here, if the amount of lightweight aggregate is less than 20 parts by weight, +r[l;[ of the hardened coating layer becomes larger, and the same fire resistance performance level Disadvantages include an increase in the amount of lightweight aggregate used per unit surface sheath compared to 300 parts by weight, and when the amount of lightweight aggregate exceeds 300 parts by weight, the AM strength of the hardened coating layer becomes brittle, resulting in poor adhesion and poor cosmetics. In addition, there are disadvantages such as a decrease in fire resistance, and if the amount of substances with a high degree of hydration is less than 50 parts by weight, it is difficult to obtain the desired fire resistance, the disadvantage of a decrease in flame resistance, and the amount of substances with a high degree of hydration. If the amount exceeds 600 parts by weight, typical problems include an increase in ill per unit area and a decrease in mechanical strength and adhesion.

In the present invention, in addition to the above three components, powders such as fire-resistant clay, fire-resistant oxide, silica sand, and lime are used as fillers, and asbestos is used as an agent to prevent cracks in the hardened coating layer and to adjust the viscosity of the composition. In addition to being able to incorporate appropriate amounts of fibrous substances such as glass fibers and rock wool fibers and surfactants, cellulose-based water-soluble resins and synthetic polymers can be used as sagging prevention agents for compositions, separation prevention agents for formulations, and viscosity adjusting agents. Dispersions (including liquids and powders) do not impede fire resistance and reduce mechanical strength and adhesion.
Form C suitable for improving stirrups by 1+'; L) ro.

Use the composition of the present invention with excellent fire resistance! When spraying on a river, it may be mixed with an appropriate amount of water and coated on the lower pond to be coated using conventional methods such as troweling or spraying.

Hereinafter, the present invention will be illustrated by examples. However, various performances in the following examples were determined by the following test methods.

(II Kamik specific gravity (air-dried IJIs A 1161
+21 pressure l11fl according to C: JIS A ll61, I
:ru (t1 position is kg/c+J) (3) Fire resistance: F~ couple is installed in the center of a 70 mm square molded body, and the surrounding area is placed in a furnace below 1000°C, and the center temperature is 350°C. Measure the time (minutes) until The degree of fire resistance is determined by the time.

(4) Weather resistance: Conduct outdoor test (6 months) and observe changes in appearance.

(5) Cosmetic paint properties: JISK5663 on the surface of the test piece.
Composite columns for external use specified in ! Fat emal noyon bay/1・
(Table 1) Prepare a composition with excellent fire resistance of the composition shown in Table 1, add water to make a paste, and then put it in a molded container and leave it. .The dimensions of the molded container are JIS A 1 except for (Φ).
A size of 161 was used. The test results are also shown in Table 1.

The samples were prepared and tested in the same manner as in the examples, and the results shown in Table 9 were obtained.

(that's all)

Claims (1)

[Claims] 1. The active ingredients are hydraulic cement, lightweight aggregate, and a substance with a high degree of hydration, and the blending ratio is 20 to 300 parts by weight of lightweight aggregate to 100 parts by weight of hydraulic cement. , a composition with excellent fire resistance, containing 50 to 600 parts by weight of a substance with a high degree of hydration. 2. The composition with excellent fire resistance performance according to claim 1, wherein the lightweight aggregate is a foamed or expanded natural mineral material. 3. The composition with excellent fire resistance performance according to claim 1 or 2, wherein the lightweight aggregate is expanded vermiculite. 4. For substances with a high degree of hydration, the constant temperature point of 100℃ is 10
0 parts by weight, of which approximately 15 parts by weight or more is dehydrated and reduced by heating at 600°C.
A composition with excellent fire resistance performance as described in Section 1. 5. Substances with a high degree of hydration are gibbsite, boehmite,
Claim 1, which is at least one particulate material selected from diasbore, aluminum hydroxide, chabazite, heurandite, mordenite, allophane, halloysite, brucite, attapulgite, sachin white, unexpanded vermiculite, and ettringite; or The composition with excellent fire resistance performance according to item 4. 6. The composition with excellent fire resistance performance according to claim 1, 4 or 5, wherein the substance with a high degree of hydration is an aluminum oxide containing crystal water or adsorbed water.