JPS60131876A - Foaming mortar 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 for foaming mortar that has excellent burnability, heat insulation properties, and early strength development.

Conventionally, metal powders such as aluminum are added to calcareous material powders such as Portland cement, causing a chemical reaction.

There was a method in which foamed mortar was formed using the gas generated at that time. However, the cured foamed mortar obtained in this way has low strength and is vulnerable to r# impact, and it is difficult to put it to practical use unless the surface of the cured product is coated with some other material. There wasn't. Also, urethane prepolymer.

It has already been added to powdered calcareous materials such as Portland cement to increase the strength and flexibility of this Portland cement.

There was no one that foamed them to provide heat insulation properties.

In the present invention, the physical properties such as low strength, impact resistance of 1 or less, and low heat insulation properties, which were problems of conventional foam mortar, have been significantly improved, and the time it takes for these physical properties to develop has also been significantly improved. It can be shortened.

In other words, the object of the present invention is to develop a foamed mortar that exhibits high strength and high thermal insulation properties at an early stage, and which can be used in many practical applications such as insulation construction of structures and chemical plants, gap filling construction, etc. An object of the present invention is to provide a composition.

And this purpose is 9 calcareous material powder, silica material powder,
In a composition consisting of metal powder, water.

It is formed by adding 5 to 50% by weight of a urethane prepolymer, which is a reaction product of a polyoxylene alkylene polyol and an isocyanate compound, to the calcareous material powder.

The calcareous powder used in the present invention is one or a composite of two or more of Portland cement, alumina cement, silica cement, fly ash cement, gypsum, slaked lime, quicklime, dolomite plaster, and the like.

In addition, examples of silica material powder include silica powder and silica sand.

Examples include clay and whitebait.

Furthermore, as metal powder, aluminum, magnesium A
, zinc, etc.

The urethane prepolymer is obtained by reacting a compound having an incyanate group, such as leylene diisocyanate-1. or xylene diisocyanate, with a polyol described below.

As polyols, there are monomers having 2 to 8 OH groups, but in order to improve compatibility with water, polyoxyalkylene polyol ether containing 5% by weight or more of dinooxyethylene is most suitable. This is because if it is less than 5% by weight, it will be difficult to mix with the compounded composition of the present invention due to its strong hydrophobicity and will easily separate.

The method for mixing with each of the above-mentioned compounded materials is to first mix 9 calcareous material powders, siliceous phase material powders, and metal powders in a powder state. As for the mixing method, a conventional method using a blender, Nauta mixer, etc. may be used. Next, the mixed powder and water are kneaded to form a slurry, and then the urethane prepolymer is immediately added and mixed.

The content ratio of the urethane prepolymer at this time was 5% by weight.
It must be within 50% by weight. If the amount is less than 5%, the strength of the cured product of the foamed mortar composition of the present invention will be weak, causing a practical problem. Moreover, if the amount is 50% by weight or more, after the urethane prepolymer is added and mixed, the foaming mortar composition will instantly solidify, making it impossible to obtain a single foam.

The foamed mortar composition of the present invention has high physical properties that could not be obtained with conventional foamed mortar compositions, that is, high strength, high impact resistance, and high heat insulation properties, and these physical properties are also exhibited. The time taken to complete the process has also been significantly shortened, making it possible to put it to practical use in buildings, chemical plants, etc.

This will be explained in detail below with examples.

Example 1 The composition is: Portland cement 100 parts by weight Silica stone powder 3
0 parts by weight aluminum 0.2 parts by weight water 40 parts by weight They were added and mixed in order according to the blending amounts.

A paste is obtained. After that, urethane prepolymer [
Trade name: Haise 1vA-1 (manufactured by Toho Chemical Co., Ltd.) 20 parts by weight were added and mixed, and the mixture was transferred to a rectangular parallelepiped container of 4×4×16e'M and a rectangular parallelepiped container of 20×20×4α, respectively, and allowed to foam and harden once. Various physical property tests are conducted using the product as a specimen. The results are shown in Table 1 and Figure 1.

Comparative Example 1 A similar specimen as in Example 1 was prepared without adding the urethane prepolymer, and similarly subjected to the O test. The results are shown in Table 1. It is shown in Figure 1.

Comparative Example 2 A specimen was prepared in the same manner as in Example 1 except that the amount of the urethane prepolymer in Example 1 was changed to 4 parts by weight, and the same test as in Example 1 was conducted. The results are shown in Table 1. It is shown in Figure 1.

Comparative Example 3 A specimen was prepared in the same manner as in Example 1 except that the amount of the urethane prepolymer in Example 1 was changed to 60 parts by weight, and the same test as in Example 1 was conducted. The results are shown in Table 1. It is shown in Figure 1.

Table 1 Note that among the test results shown in FIG. 1, Comparative Example 3 did not foam, so a compressive strength test was not conducted.

As can be understood from the above test results, in the composition of the present invention consisting of 1 calcareous material powder, silica material powder, rice metal powder, and water, polyoxyalkylene It can be seen that a foamed mortar with excellent heat insulation properties, impact resistance, and early strength development can be provided by incorporating a urethane prepolymer, which is a reaction product of a polyol and an isocyanate compound, in a range of 5 to 50% by weight. .

[Brief explanation of drawings]

The figure shows the correlation between the curing period after molding and the compressive strength of Examples and Comparative Examples. Patent applicant Kikusui Chemical Co., Ltd. Representative Akio Toyama

Claims (1)

[Claims] Calcareous material powder, silica material powder, metal powder. In a composition consisting of water, urethane prepolymer, which is a reaction product of a polyoxyalkylene polyol and an isocyanate-1 compound, is added to 9 to 9 parts of calcareous material powder.
A composition for foaming mortar, characterized in that it contains in a range of 50 M%.