JPS63111046A - Refractory heat-insulating laminated board - 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 [Industrial Application Field] The present invention relates to a fire-resistant and heat-insulating laminate board used for construction purposes such as ceiling materials and wall materials.

[Conventional technology]

Phenol foam has traditionally been used as the most flammable organic insulation material, but since it is an organic material, it causes a combustion reaction in the presence of oxygen, so its range of application was naturally limited. . In order to suppress this combustion reaction, phenol foam boards have recently been developed that have improved fire resistance by providing a specially formulated inorganic layer on the surface that is exposed to flame. For example, Utsukai Showa 55-126
No. 412, Utility Model Application No. 57-136733 and Utility Model Application No. 1983
This is the technology described in No.-127921.

That is, Utility Model Application Publication No. 55-126412 discloses a technique in which a gypsum layer and a surface material are laminated in order on phenolic foam,
Japanese Utility Model Application No. 57-1367338 discloses a technique for laminating a surface layer made of nonwoven fabric and water glass on a synthetic resin foam layer. Further, Japanese Utility Model Application Publication No. 127921/1983 discloses a technique in which a surface plate and an inorganic layer (phosphoric acid compound) are laminated in this order on a phenol foam.

[Problem that the invention seeks to solve]

However, the technique described in Japanese Utility Model Application Publication No. 55-126412@ uses 6 blue, which has the disadvantage of lack of strength and brittleness. This tendency becomes particularly noticeable as the thickness becomes thinner, which is not preferred in practice. Moreover, the surface material must be laminated, and a three-layer structure has to be adopted. Furthermore, the technique described in Japanese Utility Model Application Publication No. 57-136733 has the disadvantage of poor water resistance because it employs a water glass-based surface layer, and water glass alone is not strong enough to be used as a reinforcing material. Non-woven fabric is required, which is unfavorable in terms of fire resistance and heat insulation properties. Furthermore, the technique described in Japanese Utility Model Application No. 60-127921 employs a phosphate-based inorganic layer, so it is relatively expensive, which is not desirable from an economic point of view, and it is also weak in terms of strength.

On the other hand, inorganic paints that use hydraulic cement as a binding material have been used to repair mortar, etc., but even if this paint is used, there are certain limits to its fire resistance, and in particular, it is necessary to At present, it cannot be applied to applications that require

Therefore, as a result of extensive studies, the present inventor has found that in order to significantly improve fire resistance performance, it is desirable to suppress the heat generation as much as possible during combustion of the organic binder contained in the inorganic paint) I discovered that. In other words, this type of organic binder is originally used in combination to improve strength and workability because thin films containing only inorganic substances have weak coating strength and are brittle. Inorganic paints may appear to be non-flammable, but they are organic substances and generate heat when burned. Therefore, coatings containing them are used for applications that require particularly strict fire resistance. , which was found to act as an inhibitor of fire resistance performance.

Therefore, the purpose of this invention is to provide a coating film that has good coating strength, is dramatically superior in fire resistance, and complies with the standards set forth in Public Notice No. 1372 (September 29, 1984) of the Ministry of Construction. The present invention aims to provide a fire-resistant and heat-insulating laminate board that can meet the standards of non-combustibility regulations and is also good in terms of workability, price, etc.

Means for Solving Problem C] In order to solve the above problems, this invention employs a hydraulic cement-based inorganic paint containing a flame retardant in order to suppress the heat generation as much as possible during combustion of the organic binder. This was then coated and laminated on the surface of a heat insulating phenol board to produce a fire resistant heat insulating laminate board. .

The flame retardant used here is preferably a flame retardant suitable for suppressing the combustion of the organic matter to be mixed as much as possible.
Commercially available flame retardants such as salts, phosphoric acid compounds, organic phosphorus compounds, aluminum hydroxide, antimony trioxide, and halogen compounds can be used, or a mixture of these can be used. However, particularly preferred among these are inorganic compounds that have good miscibility with cement, such as antimony trioxide, aluminum hydroxide, borates, and phosphates.

The higher the amount of flame retardant added, the better the fire resistance will be, but from the viewpoint of coating strength and price, it is
100% is preferred. It may be added beforehand to the cement powder, or it may be added at the same time as water is mixed.

In addition to normal Portland cement, hydraulic cements include white Portland cement, alumina cement, and other mixed cements such as 5iQz, AJlz 03,
A composition containing Ca 2 O as a main component can be used. By the way, these cure in the presence of water and have a thickness of about 5IO.
If the thickness is more than III, it will be strong, but if it is less than 5IllIII, the strength will be weak and it will become brittle.To prevent this, various organic binders are mixed, so even if the thickness is thin, it will remain strong. You get layers. The organic binders used here include vinyl resins such as acrylic resin, vinyl acetate resin, polyvinyl alcohol, and vinyl chloride resin, rubber resins such as SBR, NBR, and BR, as well as VI powder and cellulose compounds. Compounds that are natural or similar, and other relatively flame-retardant materials such as phenolic resins, resorcinol resins, urea resins, melamine resins, and phthalate resins.

Resins can be used. It is usually used in the form of an emulsion or aqueous solution, but may also be an organic solvent.

It is also in powder form and can be used by mixing it with cement.

The amount to be mixed is 1 to 20% of the cement.
If it exceeds 20%, the fire resistance will deteriorate, and if it is less than 1%, the strength when finished into a thin layer will be extremely reduced.

As a mixture other than these, aggregates such as sand, crushed slag, ore, and silica sand, fillers such as mica, talc, and clay, and other reinforcing glass mill carbon fibers, potassium titanate fibers, and the like can be used. However, since it is necessary to reduce the film thickness, it is preferable to use fine particles as much as possible.

Incidentally, the appropriate thickness of the inorganic layer is 0.5 to 5IIIl. If it is too thin than 0.51IIl, the fire resistance will decrease, while if it is too thick than 511II11, the fire resistance will improve, but the weight of the laminated board coated on the phenol foam board will become heavy and difficult to handle, and the board will also be expensive. This is because it becomes

Further, as a coating method, a method of coating a slurry mixed with water using a trowel or spraying may be employed, but a device such as a roll coater may also be used. If the phenolic foam board does not have a surface material, apply it directly to the board; if there is a surface material, apply it directly on top of the surface material, or use a surface material that has been previously applied. As appropriate, a method can be employed in which the board is finished by foaming the phenolic resin, or a surface material previously applied is attached to the board using a flame-retardant adhesive or the like. It goes without saying that the lamination can be done on one side or both sides of the 7 ohm board.

Next, regarding the phenol foam board, the phenol resin raw material to be used can be an existing raw material synthesized from phenol and formalin, but if necessary, some or all of their derivatives may also be used. Can be adopted. That is, as the phenolic resin raw material, resol type, benzylic ether type liquid type, and novolac type solid type can be used. To produce phenol foam board, first, the phenol resin raw material is mixed with a low-boiling organic solvent such as a hydrocarbon or halogenated hydrocarbon, or a blowing agent that generates decomposition gases such as CO2 and N2 when heated, and an inorganic or organic acid. Alternatively, a curing agent such as hexamine is added, a foam stabilizer etc. are further mixed, and a filler and a flame retardant are further added. Next, this liquid mixture is poured into a foaming device and foamed at room temperature or under heating.

The foaming method is carried out by block foaming or continuous foaming using a laminator. The obtained block product is then cut into board shapes. On the other hand, in the case of continuous foam produced using a laminator, the surface material is usually integrally laminated at the same time as the foaming. In this case, it is particularly preferable that the surface material has flame retardant properties, such as non-flammable paper such as glass non-woven fabric, asbestos paper, calcium carbonate treated paper, aluminum hydroxide treated paper, phosphate treated paper, metal foil and other laminated layers thereof. A facing material is commonly used.

The appropriate thickness of the phenol board is 5 to 50 mm; if it is thinner than this, the heat insulation performance will be lowered, and if it is thicker, the heat insulation performance will be better, but the price of the board will be higher. Therefore, the preferred range is 5 to 50 mm.

[Effect]

As mentioned above, this invention has a hydraulic cement-based inorganic paint containing an organic binder applied and laminated on the surface of a phenol board, so it is good in terms of film strength, workability, cost, etc. By incorporating a flame retardant into the paint composition and applying it,
The obtained inorganic layer overcomes the conventional fire resistance limit and exhibits high fire resistance performance, so the laminated board of this fire resistant inorganic layer and phenol foam exhibits heat insulation properties and has the performance as a quasi-noncombustible material. Fire resistance can be improved to

〔Example〕

Resol type phenolic resin (manufactured by Toyo Rubber Industries, Ltd.)
Furanphenol PR-2011 > 100 parts by weight,
Add and mix 3 parts of foam stabilizer L-5420 (manufactured by Nippon Unicar) and 15 parts of foaming agent Freon 113, and integrally laminate asbestos surface material (basis weight 150 g/Tn2) on both sides using a laminator device. At the same time, it is foamed to a density of 45.
A phenolic foam laminate board having a thickness of 20111111 km was obtained.

An inorganic paint having the composition shown in Table 1 was applied to one surface of this board and dried, and a 15-minute combustion test was conducted according to the method described in Ministry of Construction Notification No. 1372. The result is the first
It was as listed in the table.

The moisture content of the solid paint was set to an amount suitable for application to the board surface with a trowel.

(See next page) (Note) ($1) CZ-180 manufactured by Konishi Co., Ltd.
02) CZ manufactured by Konishi Co., Ltd. ($3) Tris chloroethyl phosphate manufactured by Daihe Kagaku (City 4) It is brittle and does not form a coating.

($5) Laminated thickness of inorganic paint, which is the value obtained by subtracting the board thickness before coating from the total thickness of the laminate applied to the board and cured.

($6) Attach a thermocouple thermometer at a height of 63 cm in the center of the model box test body indicated in the public notice, and measure the temperature during combustion at that location over time for 15 minutes. It was calculated from the integral value of temperature.

As a quasi-noncombustible material with this total calorific value, The regulatory value for all is 50,000 J or less.

(*7) Indicates the maximum temperature reached during the 15 minute combustion time of the above thermocouple thermometer.

(-8)111! As is clear from Table 1, Comparative Example 3, which does not contain an organic binder, has no strength and is brittle, so no coating film is formed, but Comparative Example 2, which contains an organic binder, does not form a coating film. It is formed. However, in Comparative Example 2, the calorific value is high, and the maximum temperature reached at the center of the box is also high. On the other hand, in Examples 1 to 6 of the inorganic layer containing an organic binder and a flame retardant, there was a clear tendency for the calorific value Q■ and the maximum temperature to decrease compared to Comparative Example 2. Improvement in fire resistance performance is recognized.

〔Effect of the invention〕

As described above, the present invention aims to suppress the heat generation of the organic binder as much as possible in a fire-resistant and heat-insulating laminate board in which a hydraulic cement-based inorganic paint containing an organic binder is coated and laminated on the surface of a phenol board. Based on the idea that it would be superior in terms of further improving fire resistance,
By incorporating a flame retardant into the above-mentioned inorganic paint, the fire resistance limit of this type of board was overcome, so to speak, and it exhibited a particularly remarkable effect that was compatible with extremely severe fire resistance conditions. Moreover, it was possible to provide a fire-resistant and heat-insulating laminate board that has excellent coating film strength, good workability, cost, etc., and greatly contributes to the technical field.

Claims (1)

[Claims] (1) In a fire-resistant and heat-insulating laminated board in which a hydraulic cement-based inorganic paint containing an organic binder is laminated on the surface of a phenol board, it is difficult to suppress heat generation as much as possible during combustion of the organic binder in the inorganic paint. A fire-resistant and heat-insulating laminated board characterized by containing a refueling agent.