JPS60191069A - Cure accelerator for composition for inorganic normal temperature foamed body - 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 curing accelerator for stably obtaining a specific inorganic room-temperature foam, especially at low temperatures.

Further, by adding the above-mentioned curing accelerator, properties such as adhesion to various substrates of the inorganic room-temperature foam can be improved.

The inventors of the present invention have been researching compositions for inorganic room-temperature foams for more than 10 years and have made numerous inventions. The basic fume murenoyon has been described in many previous specifications, but to summarize again, (al water soluble alkali silicate, +tn water soluble alkali silicate hardening agent, tel metal blowing agent, In addition, if necessary, fd) a foaming stabilizer is added. These ta+~fd
The ingredients of 1 are appropriately mixed, and substances such as various additives, extenders, and fillers are added according to the specific method of use.
Through the pasting process, a strong foam with a high expansion ratio and excellent performance has been obtained. The composition for inorganic quality foam can be applied to the core material, coating material, and adhesive of the molded plate through construction methods such as casting, spraying, troweling, and U with a roller. agents, insulation materials, fireproof materials, etc.
It has been used as a building material or as a general industrial material, and has been used for many years, but when it is used in periods or places with low temperatures, urea resin foam, urethane resin foam, etc. As with the solid cold foam compositions, the specific foam region had to be changed each time. However, when considering the practicality of the composition, such changes lead to complications such as changes in the physical properties of the resulting foam, changes in the method of use for obtaining the foam, and an increase in the variety of products due to differences in the composition. Therefore, it has been widely desired to solve such problems by using special auxiliary ingredients.

However, the present inventors were able to solve this problem through the above-mentioned method. That is, the present invention adds and blends an alkali metal hydroxide as an active ingredient as a specific reaction curing accelerator to the above-mentioned composition for inorganic room-temperature foam when it is applied to a period or place where the temperature is low. What we have come to solve is that the addition of the curing accelerator does not reduce the basic physical properties of the inorganic quality foam, and can be used for various substrates. We were able to improve properties such as adhesion to the surface, albeit slightly. The present invention will be described in detail below.

As mentioned above, the inorganic room-temperature foam composition of the present invention uses a water-soluble alkali silicate as the ta+ component, which allows for easy improvement of various properties by simply mixing with other raw materials at room temperature. Excellent foams can be obtained, exhibiting effective caking properties, and allowing the foaming reaction to occur efficiently. The above object cannot be achieved with water II soluble or insoluble alkali silicates such as ordinary water glass cullet.

Examples of the alkali component constituting component fa) include alkali metal silicates such as lithium, sodium, potassium, and rubidium, but sodium and potassium are particularly inexpensive and easily available, and are suitable for use in compositions. The acceleration of the curing effect is significant and desirable. Also, the (δ
) As long as the component is water-soluble, there are no restrictions on its composition or the molar ratio between the alkaline substance and 5i02, but the above molar ratio is usually 1.2 to 4.0, particularly 1.5 to 3.0. It is preferable to do so. Next, the curing agent for the water-soluble alkali silicate which is the bl component is hydraulic cement, silica dust,
Acidic metal oxides, divalent or higher valent metal salts of higher fatty acids, divalent or higher valent metal salts of water-soluble polymer substances having carboxyl groups, phosphates, borates, sulfates and divalent metals of At least one selected from the group of sulfites of valent metals. Specific examples of this curable component are as follows. Hydraulic cements include hydraulic lime, natural cement, portland cement, single cement such as alumina cement, lime mixed cement, blast furnace cement, silica cement, fry ansonocement, masonry cement, iT'tl sulfate cement, etc. An example is mixed cement. Typical examples of divalent or higher-valent metal salts of higher fatty acids include stearic acid and balmitic acid, such as zinc salts, aluminum salts, calcium salts, barium salts, magnesium salts, and nickel salts. A divalent or higher valent salt of a water-soluble polymer containing a calhochytyl group is a water-soluble polymer composed of alginic acid, polyacrylic acid, polymethacrylic acid, cellulose derivative, alkyd resin, aminoalkyd resin, etc. The metals are ZnXCu, Ca,
Mg, Be5Sr, 'Ba, 81, Ti-ZrS
Sn, CrS MO, WS Sll, Mn, Fe
.

A metal selected from Co5Ni and (2), which forms a salt with the water-soluble polymer and the metal.

Silica dust is a by-product produced when silicon or silicon alloys are manufactured by electrothermal metallurgy. Desirable silica dust has a particle size of about 0.1 to 1. About μ, specific surface area about 5-50n? /g, and a specific gravity of about 0.1 to 0.
3 and 5i02 min is 60% or more, preferably 80%
% by weight or more. Acidic metal oxide is ZnO
, Cr, O, +MnO, MnO2, FeO, CoO.

Phosphates include aluminum phosphate, calcium phosphate, zinc phosphate, thallium phosphate, scrontium phosphate, barium phosphate, magnesium phosphate, manganese phosphate, etc., and borates include zinc borate. , magnesium borate J., manganese borate, lead borate, nickel borate, calcium borate, etc. As sulfates of divalent metals, magnesium sulfate, zinc sulfate, calcium sulfate, barium sulfate, etc. Sulfites include calcium sulfite, magnesium sulfite, zinc sulfite,
Examples include copper sulfite, etc. (Metallic foaming agents are used as the C1 component, and various metal elements, metal alloys, and intermetallic compounds can be used. As metal elements, J of the periodic table is used.
IB, IIIA, lI[B, NA, IVB.

Those belonging to VA, VB, VIB, ■B, and group ■ are preferable, and such metal elements include Cr, Mn, Ti, and Z.
r, V, Sl, Ge-Sb-C0% Nl, Cu, ^
Examples include 1, Zn, Ca, etc., especially Ti, Zr,
V, Δ1, Si, Ge, Sb.

Zn and the like are desirable. Alloys or intermetallic compounds (
Typical examples of chemical bonds between metals or between metals and non-metals are ^1-5i, 8l-Ti +
Al-Mn, Al-Cu, Al-Cu-3r, Z
n-5゜Zn-5n, Cu-3i,,Fe-5i
, , 5i-Ni% Go-Sb, and the like. One or more of these metal foaming agents are usually used in the form of fine powder. In order to improve the efficiency of component tC), a foaming stabilizer can be further added to the above three components as necessary. Such substances include inorganic substances selected from silica gel, zeolite, carbon blank, activated carbon, talc, mica, palygorskite, and seviolite, surfactants, and animal proteins and dimethyl silicon derivatives conventionally known as cement foaming agents. Organic substances can be used. others,
Synthetic resins, lightweight aggregates, and various powder fillers can be appropriately blended in order to improve the strength or lightness of the foam for manufacturing the foam, but the amount of blending should not be such as to impede the effect of obtaining the foam that is the objective of the present invention. must not.

The present invention consists in adding and using an alkali metal hydroxide to the composition as a curing accelerator to obtain the composition stably even at low temperatures, which is the object of the present invention. are lithium hydroxide, sodium hydroxide,
Potassium hydroxide, rubidium hydroxide, etc. can be listed, and when used, it is in the form of an aqueous solution, preferably 10
~40Tim% aqueous solution, the amount of which is added in terms of alkali metal oxide, is about 2 parts by weight or less per 100 parts by weight of the inorganic cold foam composition paste, preferably depending on the temperature conditions, It is used in a range of 0.3 to 0.8 ffi parts (that is, when a 30% by weight aqueous solution is used, about 0.9 to 2.4 parts by weight per 100 parts by weight of paste). If the amount of the accelerator used exceeds about 2 parts by weight, the strength, water resistance, etc. of the resulting foam will decrease, which is undesirable. By using such a curing accelerator, for example, when performing construction at a temperature of 1°C, the foaming reaction and curing reaction do not proceed when the curing accelerator is not added. By adding about 1 part by weight to the base, the foam curing reaction proceeds in the initial period (i.e., the foam curing reaction time under standard conditions), and it does not affect the properties of the foam in any way. It was found that not only was there no deterioration, but properties such as adhesion to various base materials such as metal materials, concrete materials, wood materials, and ceramic materials were slightly improved. Although this improvement in adhesion is only within the range of about 20% compared to that without the addition of a curing accelerator, it is practically sufficient to omit adhesion reinforcing materials and improve vibration resistance. useful.

Hereinafter, embodiments of the present invention will be described in detail with reference to Examples and Comparative Examples.

Example 1 A composition for an inorganic poultry foam having the following formulation was prepared.

(A) Agent Sodium silicate 35% aqueous solution 100 parts by weight CB) Agent Metal aluminum powder 3 parts by weight Cement 60 parts by weight Silica powder 30i [1 part Pearlite 10 parts by weight Low temperature test adjusted to 1°C, fJ, 50% of degree After leaving Agent 2 (A) and Agent CB for 24 hours in a room, mix both agents to form a paste, adjust this to 100 parts by weight, and add 20% by weight to the paste. Add 1 part by weight of aqueous solution of caustic soda at a concentration of 40 x 4.
The foam was placed in a wooden mold having dimensions of 0.times.160 mm and allowed to foam to harden. After about 1 hour, a foam was obtained. When the physical properties of this foam were measured, there was no difference from the foam cured at 20°C and 65% (it took 1 hour to harden and foam). Also, when we measured the degree of adhesion to the formwork, the adhesion strength was 2.8.
kg/cm, and the standard condition is 2.4 kg/ca
It was l.

Example 2 A composition for an inorganic room-temperature foam having the following formulation was prepared.

(A) Agent Sodium silicate 35% aqueous solution 100 parts by weight CB) Agent Metal aluminum powder 3 parts by weight Cement 30 parts by weight Talc powder 30 parts by weight Silica stone powder 30 parts by weight Pearlite 10 parts by weight Temperature 3°C, humidity adjusted to 50% The above (A) agent and CB) agent were left for 24 hours in a low-temperature test chamber, and then both agents were mixed to form a paste, the amount was adjusted to 100 parts by weight, and 203ii i was added to the paste. % concentration of caustic potassium aqueous solution was blended and immediately applied to the surface of the asbestos slate substrate using a spray gun, and foamed and hardened. After about 50 minutes, a foam was obtained. When we measured the physical properties of this foam, we found that it was cured at 20°C and 65% (
There was no difference in curing and foaming (which required 40 minutes). Also, when we measured the degree of adhesion to the formwork, the adhesion strength was 3.6 kg1
ctl, and the standard state was 3.3 kg/c+a.

As described below, it has been confirmed that the initial objective of the present invention can be achieved by adding and using a specific curing accelerator.

(Hereinafter referred to as "2") Patent applicant Shikoku Kaken Kogyo Co., Ltd. - TJ Kuko 5 Zo Ichisho Sho 2 (Method) % formula % 1. Indication of the case 1982 Patent Application No. 23676 2. Name of the invention Inorganic normal temperature Hardening accelerator for compositions for foams 3 Relationship with the case of the person making the amendment Patent applicant address 4-5 Minamishimizu-cho, Ibaraki-shi, Osaka May 9, 1980 (shipment date 5 B 29 of the same year) 5 , the application to be amended and the details of the amendment as shown in the attached sheet

Claims (1)

[Claims] Acceleration of reaction curing of a composition for a j11j heat-treated foam comprising a 1ial water-soluble alkali silicate, a (+1) water-soluble alkali silicate curing agent, and a +01 gold-flexible foaming agent. A curing accelerator for a composition for an interstitial room temperature foam whose J component is an alkali metal hydroxide. 2. An interstitial room temperature foam obtained by further blending an FD1 foam stabilizer with the composition. 2. A curing accelerator for a composition for inorganic quality foam according to claim 1, which contains an alkali metal hydroxide as an effective component for accelerating the reaction curing of the composition.