JPS6317273A - Heat insulating composition - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heat insulating material composition used for building siding and the like.

(Prior technology) Conventional siding has been mixed with perlite in hydraulic inorganic materials such as cement mortar in order to provide heat insulation and lightweight properties, but since perlite has high water absorption, it cannot penetrate in cold regions. It is prone to cracking due to freezing and thawing of moisture, and since its specific gravity is relatively high, it is difficult to expect much weight reduction, and it also has problems such as poor insulation properties because it is easily crushed and powdered. It was also considered to incorporate lightweight and durable synthetic resin foam, but synthetic resin foam floated to the surface of the mortar due to the difference in specific gravity with the mortar, making it difficult to disperse uniformly, so it was not used. .

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention seeks to provide a heat insulating material composition that provides freeze-thaw resistant and lightweight heat insulating siding without using perlite.

[Structure of the invention]

(Means for solving the problems) The present invention provides: (A) Water 100
Weight part Hydraulic wireless material 50-30
0/I lightweight siliceous aggregate 10-100 n
Primary foamed polystyrene beads 1-10//(B) Water ioo Part by weight Foaming agent 0.01-Q, in Film stabilizer 1-5 units! water-based synthetic resin
1 to 5 Slurry 1 of the above (A) formulation
It is made by mixing 10 to 50 parts by volume of the foaming liquid with the formulation [3> per 00 parts.

The composition of the present invention is composed of a slurry containing expanded polystyrene beads and a foaming liquid, and this composition is filled onto a concave inorganic substrate and heated in an autoclave to harden and form siding. , then slurry,
The foaming liquid and the inorganic substrate will be explained.

Examples of slurry formulations are as follows.

Water 100 parts by weight Cement 200)! Silicone Dust 5011 Primary Expanded Polystyrene Beads (60 times Expanded) 3 The above blend is operated in a conventional mixer to obtain a slurry.

This slurry is in the form of a paste or mortar, and the ratio of each component is varied so as to maintain fluidity to the extent that the leveling property of the surface after filling the inorganic substrate is maintained in combination with the amount of the foaming liquid added, which will be described later. In other words, when the amount of cement is 300 parts or more relative to the water content ω, the slurry loses its fluidity considerably, making it difficult to level the slurry even if it is filled into the recesses of the substrate. At this time, bubbles tend to disappear.

In addition, silicon dust (or silica hume) etc.
i02 min is more than 95%, and since it is lightweight, amorphous, and fine powder, it reacts extremely quickly with cement, and when heated and cured in an autoclave, it has a
It quickly supplies iQ2 and plays the role of creating strong calcium silicate salt.

Normally silicon dust during ferrosilicon production is 5iQ
2 minutes is more than 98%, and the weight is 20% compared to cement.
The amount to be added is determined by the content of Si 2 in the composition. More than 95% of crystalline silica sand is supplied to the market, but the specific gravity is 2.
．． 7, which increases the specific gravity of the composition, which goes against the weight reduction which is the objective of the present invention. Furthermore, the addition of silicone dust helps to adjust the viscosity of the slurry, and also has the effect of preventing the foamed polystyrene beads added later from floating due to the difference in specific gravity.

The diameter of the primary foamed polystyrene beads is 3s.
The following are desirable, and for weight reduction, high-magnification foaming is preferred. Usually, primary foam beads have a diameter of 3
M, the maximum secondary expansion ratio is about 70 to 80 times, and with foamed beads of 38 or more, the beads swell up after filling with the composition and are difficult to form a flat shape, and many pores due to the molten foamed polystyrene beads occur on the surface, making it difficult to use as siding. This will cause problems in terms of appearance during construction.

Examples of the formulation of the foaming liquid to be added to the above slurry are as follows.

water 1
00 parts by weight Foaming agent (sodium polyoxyethylene alkylate) Q, i
n-film stabilizer (methylpropylethylcellulose)

1.5 No.I water-based synthetic resin (acrylic resin emulsion solid content 30%)
5. Mix the above composition using a mixer, and then sufficiently foam the mixed liquid using an air-entraining foaming machine to produce a creamy foamed liquid.

As foaming agents, polyoxyethylene alkyl ether or polyethylene glycol fatty acid ether sodium salts, sodium alpha olefin sulfonate, etc. are used among various usual surfactants. Must be a compound.

Further, in order to prevent these fine bubbles from combining to form large bubbles, a film stabilizer such as C, M, C1 methylcellulose, methylpropylcellulose, casein, gum arabic, etc. is added. The amount added is limited to 5 parts by weight; anything more than this will promote the connection of air bubbles and impair dispersion. Furthermore, a water-soluble or emulsion type water-based synthetic resin such as alkali-resistant acrylic, urethane, or PVA is added to strengthen the gas film and improve the waterproof property of the gas film after curing. This resin liquid mixes with the gas film and serves to maintain the waterproof properties of the cured foam. However, the amount added is limited to about 5 parts by weight; adding more than this increases the viscosity.
The effect will not increase and it will be economically disadvantageous. Usually, by adding these foaming agents, foaming stabilizers, and waterproofing agents, the raw foaming liquid is foamed into a foam cream that is 10 to 20 times finer in the foaming process. Add 5 parts of this to 100 parts by weight of the slurry.
Add approximately 0 volume of liquid and mix with a mixer.

This mixing volume is also about 50 parts, which is sufficient to fill the voids between the secondary foamed polystyrene balloons.

The heat insulating material composition made of this slurry and foaming liquid includes a first
As shown in the figure, the foamed polystyrene beads 2 are evenly dispersed in the slurry, which has become foamy and creamy due to the air bubbles 1.
By filling this into the inorganic substrate 3 and heating it as shown in Fig. M2, both are hardened and the siding 4 is obtained. By heating, the expanded polystyrene beads 2 are melted and then hardened, forming a closed-cell balloon 2a made of a waterproof membrane, as shown in FIG.

The inorganic substrate usually has a cement-based or hydraulic inorganic material such as silica stone, lime, or gypsum slack as its main component, and also contains aggregates such as silica stone, lightweight aggregates such as perlite, and Vs-free materials such as asbestos.
It consists of IIi fibers or synthetic fibers, a fluidity modifier such as methyl cellulose, and water, and is blended at a blending ratio that can be extruded using a conventional two-stage screw set vacuum extruder. An example of the combination is as follows.

Cement 100 Shigenobu Kei
sand 100
〃Pearlite 30〃stone
cotton 5
〃Synthesis 1BM O,5〃Methylcellulose 1〃Water
38 〃
After filling the insulating material composition into the recesses on the uncured and moist inorganic substrate molded with the above formulation, leave it at 50°C to 90°C.
Cured and cured in steam at 0°C, and after pseudo-condensation, placed in a high-temperature, high-pressure autoclave at 6.5 atm and 120°C to 165°C.
The heat insulating material composition and the inorganic substrate are cured together by heating. The temperature and pressure of the autoclave are controlled by the heat resistance of the waterproof resin liquid in the foaming liquid.

(Function) By blending a foaming liquid into the slurry containing primary foamed polystyrene beads, the foaming liquid uniformly disperses fine bubbles in the slurry, and the slurry becomes creamy with a light viscosity. It acts to uniformly disperse the expanded polystyrene beads without lifting them. The uniformly dispersed expanded polystyrene beads are heated and melted into a balloon, forming a hollow body with a polystyrene waterproof membrane, giving the product weight reduction, heat insulation and waterproof properties. This waterproof property prevents moisture from entering and prevents cracks from forming due to freezing and thawing of moisture in cold regions. Furthermore, the slurry of the heat insulating material composition contains 50 to 300 parts by weight of a hydraulic inorganic material to 100 parts by weight of water to maintain fluidity and prevent bubbles from disappearing during mixing of the foaming liquid, and also contains silica bones. 10 to 10 parts by weight of the material is an appropriate amount to react with the inorganic material to produce calcium silicate, and 1 to 10 parts by weight of primary foamed polystyrene beads is an amount sufficient to prevent the beads from protruding when filled with the composition. This is the blending ratio. Regarding the foaming liquid, if the amount of the film stabilizer exceeds 51 parts, the dispersibility of the bubbles will be impaired, and if the amount of the aqueous synthetic resin exceeds 51 parts, the viscosity of the foaming liquid will increase and the foaming performance will be hindered. Ru.

(Example) A substrate composition having the following composition was used at Mikami Kogyo Co., Ltd. IHT.
A die was attached to a 200 type extrusion tank, and after extrusion molding at 6 TrL, the product was taken out onto a continuously moving stainless steel pallet.

Portland cement 35 parts by weight silicon
sand 35
〃Pearlite 25〃Asbestos 5 n
Methylcellulose 1 Synthesis! l fiber
0.5 water
30 Separately, a slurry for insulation material having the following composition was prepared using a paddle mixer.

Water 100 Parts by weight Portland cement 230 JJ silicone fume dust 10J1 Primary foamed polystyrene beads (60 times expanded) 10 Water reducing agent (polycarboxylic acid salt) 1 Next, as a foaming liquid, use a separate paddle mixer to create the following composition. The foam solution was made from WA.

water 1
00 1 part foaming agent 0.1
of! Methylcellulose 1 Acrylic resin emulsion (30% solids) (solids 1
．． 51 polyvinyl alcohol (10% solids) (solids Q, 5
n) Melment (melamine resin condensing agent) This foaming liquid is foamed 15 times through a foaming device, and 50 parts by volume are added to 100 parts by weight of the slurry and stirred to produce a heat insulating material composition. The insulating material composition was poured into the recess on the upper surface of the substrate molded product that was being picked up and moved, cut to an appropriate length, left at room temperature for 6 hours, and cured in steam at 50°C for 6 hours.The molded product filled with the insulating material composition was then placed in an autoclave. 140℃
This product obtained by curing with JISA1
Passed grade 1 (non-combustible materials) in the flame retardant test method for building interior materials and construction methods in 321. Also, J.I.S.
Passed the 2nd class heating test according to A1301 fire protection test method for wooden parts of buildings (fire protection structure).

Also, the weight, nailing properties, and sawing properties were good.

〔Effect of the invention〕

According to the present invention, by blending a slurry containing foamed polystyrene beads with a foamed foaming liquid, the foamed polystyrene beads can be uniformly dispersed, thereby reducing the weight of the heat insulating material of the product and improving its heat insulation properties. , waterproofness can be improved.

[Brief explanation of the drawing]

Figure 1 is an enlarged sectional view of a part of the heat insulating composition of the present invention, Figure 2 is a sectional view of siding filled with the above heat insulating composition, and Figure 3 is an enlarged view of the heat cured heat insulating composition. FIG. Tewaken M Authorized Letter (Spontaneous) September 19, 1985 14 Akio Kuroda, Director-General of the Office of Patent Application No. 157132, 1988 2, Name of Invention Insulating Material Composition 3, Case of Person Who Makes Amendment Related Patent applicant Bell Center Co., Ltd. 4, agent 4-3-22 Shinjuku, Shinjuku-ku, Tokyo (Ando Building) Telephone:
03-352-1561 (Main) 5, Date of amendment order None 6, Subject of amendment ``Detailed description of the invention'' column in the specification. 7. Contents of the amendment (1) On page 4, lines 12 and 13 of the specification, the phrase "maintain fluidity" is corrected to "maintain fluidity." (B) On page 4, line 15 of the specification, the phrase ``flowability is lost'' is corrected to ``flowability is lost''. (3) "Silica stone" is written on page 8, line 13 of the specification,
Corrected to "silica (amorphous fine grain)". (4) On page 4, line 14 of the specification, the words "Stone Slack" are corrected to "Gypsum Slap." (5) In Mei 18, page 8, line 15, the word "silica stone" is corrected to "silica stone (silica sand)." (6) On page 12, line 11 of the specification opening, the phrase "melamine resin condensing agent" is corrected to "melamine resin condensing agent."

Claims (1)

[Claims] (1) A heat insulating material composition (A) characterized by mixing 10 to 50 parts by volume of a foaming liquid having the following formulation (B) to 100 parts by weight of a slurry having the following formulation (A): ▲Formula , chemical formulas, tables, etc. ▼ (B) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼