JPS60215091A - Sealing material - Google Patents

Abstract

PURPOSE:To provide a sealing material having excellent airtightness, moistureproofness and waterproofness, by providing a pressure-sensitive adhesive layer on part or the whole of the surface of the circumferential side wall of a strip composed of a thermally foamable material consisting of a carbide film-forming agent, a blowing agent and a catalyst. CONSTITUTION:A pressure-sensitive adhesive layer 3 composed of a synthetic butyl rubber is provided on part or the whole of the surface of the circumferential side wall of a strip 2 having a desired crosssectional and composed of a thermally foamable material consisting of a carbide film-forming agent (e.g. starch), a blowing agent (e.g. dicyandiamide), a catalyst (e.g. aluminum polyphosphate) and optionally a liquid org. material such as a liquid rubber. EFFECT:A sealing material having excellent airtightness, long-term stability and applicability can be obtd. USE:Material for a fireproof wall of buildings, vessels, duct, wire, cable, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealing material, and particularly to a sealing material that has fireproofing and waterproofing functions and is used for fireproof walls, ducts, electric wires, cables, penetration parts, etc. of buildings, ships, etc. It is.

The present invention provides superior moisture-proofing, waterproofing, and airtightness by providing a special adhesive layer on a part of the circumferential wall of a strip of heat-foamed material consisting of a carbonized film-forming agent, a foaming agent, and a catalyst, and on the entire surface. It is a sealing material that has the function of blocking smoke, toxic gas, and heat by forming a foamed carbonized layer by heating in the event of a fire.

Traditionally used fireproof materials include cement,
Inorganic materials such as asbestos and gypsum, synthetic rubber and/or
Or flame retardants and fillers in synthetic resins.

There are flame-retardant, non-foaming fireproofing materials that contain a plasticizer and the like, and thermally foamable fireproofing materials that contain a carbonized film-forming agent, a blowing agent, and a catalyst.

Inorganic materials such as cement, asbestos, and gypsum are noncombustible and have excellent fire prevention effects, but they have problems with waterproofing, moisture proofing, and airtightness because they cannot follow the movement of the joints and building blocks.

In addition, non-foaming fireproof materials are often used in the form of putty or tape for waterproofing, moisture-proofing purposes.

Although it has excellent airtightness, it is likely to generate toxic gases such as halogen gas in the event of a fire. Additionally, there is a problem with the sealing effect when the frame moves.

In addition, thermally foamable fireproofing materials foam due to heat when a fire occurs, so they have an excellent sealing effect against heat, smoke, toxic gas, etc. in gaps created by movement of the building structure in the 1% gap. Due to the lack of water resistance of the carbonized materials, they were not necessarily airtight, moisture-proof, and waterproof.

The present invention was developed through intensive research to overcome the disadvantages and shortcomings of the conventional products as described above.

As can be seen in the drawings, one piece of the sealing material of the present invention has a desired cross-sectional shape, and the basic composition is a carbonized film forming agent, a blowing agent,
Surroundings of the thermally foamed material strip 2 made of catalyst and the skeleton strip 2 @
It is characterized by comprising an adhesive layer 8, preferably a butyl synthetic rubber adhesive layer 8, which is laminated on a part or the entire surface of the wall.

That is, to explain the drawings showing each embodiment of the present invention, the sealing material 1 shown in FIG. 1 has an adhesive layer 8 wrapped around the entire surface of a strip 2 made of a thermally foamed material. 0 Figures 2 to 5 show the area around the strip 2 made of thermally foamed material.
The pressure-sensitive adhesive layer 8 is wrapped around only a specific surface of the wall.

Figures 6 to 8 show cross-sectional shapes of square and triangular circular circles, and the whole circumferential surface of the strip 2 of thermally foamed material [1iiiK adhesive layer 8 is wrapped around it, but the second It is also possible to wrap the adhesive layer 8 around a specific surface in the same way as shown in FIGS.

Note that the cross-sectional shape, thickness, width, etc. of the sealing material 1 can be made into any desired shape and size depending on the location to which it is applied, and if necessary, a release paper (not shown) may be applied to the surface of the adhesive layer 8. may be provided.

In addition to the thermally foamable material used in the present invention, the basic composition includes starch, sugar, a carbonized film forming agent such as pentaerythritol, a blowing agent such as melamine or dicyandiamide, and a catalyst such as ammonium sulfate or anthonium polyphosphate. In addition to the above three components, examples include those to which a liquid organic substance such as liquid rubber is added, and those to which a hollow filler is added. is the preferred fire retardant material for use in

Examples of adhesives include sealing materials and adhesive resins made by blending synthetic rubber and/or FR resin with softeners, fillers, tackifiers, etc., but preferably, butyl-based synthetic resins are used. Adhesives made of rubber are good.

Next, the present invention will be explained in detail with reference to Examples, but the present invention is not limited in any way by the Examples.

As the synthetic resin adhesive, ZXN-290, manufactured by Ichisha Yushi Kogyo Co., Ltd. and made of an acrylic copolymer resin, is used.

As the adhesive made of butyl synthetic rubber, those shown in Table 1 are used.

Table (parts by weight) 1 Butyl rubber 1 100 2 Polybdenum $ 2 100 8 Carbon Black Fist 810 4 Tackifier 420 b Filler - 580 - 1 Exxon Chemical Co., Ltd. Product name Exxon Butyl 268
2 Nippon Oil Stock Exhibition Product Name Polybutene HV-800.8 Asahi Riki-Bon Co., Ltd. Product Name Asahi #70 114 Esso Chemicals Co., Ltd. Product Name Kokoretsu 11
0g/5 Nippon Silica special product name Nip Seal VN.

Method for producing test specimen 2 wxt Dimensions 1+n X I Zm X 118i
Fabricate a nL test specimen.

Next, as shown in Figure 1θ, one of the refractory bricks (size 65g + *
A cross-shaped groove with a depth of 4 mm and a width of 20 mm was installed on the 18 x 28 mm x 18 mm x 28 mm x 18 inch x 28 mm x 18 inch x 28 mm x 18 mm x 28 mm x 18 mm x 28 mm x 1.5 mm x 1.5 mm x 2.0 mm x 1.8 mm x 2.8 mm x 1.8 mm x 2.0 x 2.0 x 1.5 mm. A combination of blank bricks will be used as the specimen for the fire protection performance test.

Furthermore, as shown in Figure 11, a grooveless brick was placed on the brick surface on which the sealing material of the present invention (Figure 2) was installed, and the brick-to-brick space in the direction perpendicular to the sealing material of the present invention was sealed watertight using a commercially available caulking material. shall be used as the specimen for the watertight performance test.

Test method: (1) Fire protection performance test The above specimen is heated with a gas burner for 10 minutes as shown in Figure 12, and the gas sealing property and foaming state are observed.

(Phantom Water Tightness Test When water is injected from the upper groove of the above specimen in which the sealing material of the present invention is not installed, the presence or absence of water leakage from the lower part is observed.

In the fire protection performance test of the present invention, smoke stopped coming from the top after 5 minutes, and after 10 minutes in the foamed state, the brick grooves were completely sealed by the carbonized foam layer, and no smoke was generated from the grooves at the top of the bricks during heating. No heat is allowed.

Furthermore, in the watertight performance test, no water leakage from the lower groove was observed, nor was there any abnormality in the condition of the sealant.

That is, the present invention is a sealing material in which the circumferential surface of two strips made of a thermally foamed material is coated with the adhesive layer 8 described above, and is moisture proof, which has been a drawback of conventional thermally foamed materials.

Not only are waterproofing and airtightness improved, but since all of these functions are integrated, there is no need to separately provide a waterproofing layer and a fireproofing layer, which simplifies the process.

By using a sealing material made of butyl-based synthetic rubber as the adhesive, it has even better airtightness and long-term stability, making it highly economical.Since the surface is sticky, it can be easily filled into the work area. The workability has been significantly improved, such as ease of installation, making it industrially useful.

Also, depending on the direction in which the water is stopped, various combinations of thermal foaming material and adhesive can be used.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIGS. 8 to 9 are cross-sectional views showing other embodiments of the present invention. Figure 10 is a diagram showing a refractory brick with the sealing material of the present invention installed in the test method of the present invention, and Figure 11 is a diagram showing a refractory brick treated with caulking as a specimen for a watertightness test. Furthermore, FIG. 12 is a drawing of the fire protection performance test method. DESCRIPTION OF SYMBOLS 1... Sealing material 2... Strip made of thermally foamed material 3... Adhesive layer 4... Firebrick 5... Sealing material of the present invention 6... Commercially available caulking material 7... Gas burner. Figure 1 Figure 2 Figure 9

Claims (1)

[Claims] L has a desired cross-sectional shape and has a basic composition of carbonized film forming agent 1
A strip 2 of thermally foamable material consisting of a blowing agent and a catalyst, and the strip 2
A sealing material comprising: an adhesive layer 8 which is laminated on a part or the entire surface of a peripheral side wall of the sealing material. The sealing material according to claim 1, wherein the adhesive of the adhesive layer 8 is butyl thread synthetic rubber.