JPS5865780A - Fireproof putty composition - Google Patents

Abstract

PURPOSE:To provide a fireproof putty compsn. which is non-drying at ordinary temperature and forms a heat-resistant cured article when heated, by blending a liquid resol type phenolic resin, a water-insoluble inorg. filler and a flame-retardant fibrous material in a specified ratio. CONSTITUTION:100pts.wt. liquid resol type phenolic resin such as a low-viscosity liquid polymer obtd. by reacting phenol or its derivative with formalin in the presence of an alkaline catalyst, 200-600pts.wt. water-insoluble hydrated inorg. filler such as hydrated aluminum hydroxide, and 20-100pts.wt. flame-retardant or non-combustible fibrous material such as vinyl acetate resin fiber or asbestos fiber are mixed together.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of a fire protection composition, which is non-drying at room temperature and hardened by heating to obtain a heat resistant fire protection composition. That is.

In general, putty-like compositions that are non-drying at room temperature are used in large quantities to fill voids in penetrating parts of walls, floors, etc. in civil engineering, construction, electrical, and automation fields, and to maintain airtightness and watertightness. used in

The purpose of using a fireproof putty composition for electric wires and cables is to prevent the spread of fire in the event of a fire, but it also has a function that is physically and chemically stable even during normal times other than during a fire. It is necessary to maintain the In other words, as a fire protection device that fills and seals gaps in the penetrations of electric wires and cables, when electric wires and cables are normally energized, the fire protection device is heated to about 40 to 80 degrees Celsius. Therefore, it is required to be morphologically stable without softening at this temperature.

In response to such a demand, there is a conventional method in which a two-component curing material such as a synthetic resin is formed into a tape shape or a straight shape, and then filled and sealed while being mixed during construction. However, this method is cumbersome and hardens at room temperature, so once the gap is filled, it will harden and become a solid state even when no electricity is applied to the cable, so even if you try to redo the filling process, it will not work. It was impossible to do so.

In addition, liquid chlorinated paraffin, flame-retardant liquid rubber, or semi-drying vegetable oil are used, but these soften when heated to several tens of degrees, making it difficult to maintain their shape and preventing fires over 100 degrees Celsius. Over time, it may gradually harden or decompose.

As a result of intensive research aimed at improving these drawbacks, the present inventor has developed a single putty-like composition that does not harden at room temperature but hardens when heated, without using a two-component curing type. This is what I found. That is, the present invention involves mixing 100 parts by weight of a liquid resol type phenolic resin, 200 to 600 parts by weight of an insoluble inorganic filler having water of hydration, and 20 to 100 parts by weight of a flame-retardant or non-combustible fiber material. is expressed as a percentage.

The resol-type phenolic resin that serves as the binder in the present invention has a non-hardening type at room temperature, hardens into resitol at several tens of degrees, and becomes an insoluble hardened resitol when heated to a higher temperature, so it can be used for electric wires, cables, etc. When used in a fire, it quickly hardens and seals in the event of a fire, making it suitable for pounding.

The resol type phenolic resin is obtained by reacting phenol itself or its aromatic nucleus-substituted product with formalin under an alkali catalyst, and is a liquid with low viscosity at room temperature.

However, since the resol type phenolic resin itself is easily flammable, the skeleton resin alone cannot be used as a fire prevention putty.

The present invention uses a water-insoluble inorganic filler containing hydrated water, such as hydrated aluminum, as a flame retardant, and when the temperature reaches a high temperature such as during a fire, crystallization water is released, making the fire prevention effect even more effective. It is intended to be a fake. Add this amount to 20 m/t part of resol m phenol resin.
The reason why the amount is limited to 0 to 600 parts by weight is that if it is less than 200 parts by weight, the flame retardant effect will be weak, and if it exceeds 600 parts by weight, it will not be possible to maintain a putty-like state at room temperature.

The present invention also uses flame-retardant or non-combustible inorganic fiber materials such as asbestos fibers and glass fibers, or organic fiber materials such as vinyl chloride resin fibers, etc., to make the can. The reason why the amount added is limited to 20 to 100 parts by weight per 100 parts by weight of the resol-based phenolic resin is that if it is less than 20 parts by weight, it will not be possible to improve the mechanical strength. If it exceeds 0, it will harden at room temperature as described above and will not have a knotted state. You can add calcrum, clay, etc.

Next, examples of the present invention will be described. Example (1) ~
(3) and comparative examples (1) to (2). A four-teeth composition according to the present invention and a composition according to the present invention and a comparative example according to the compositions shown in Table 1 were obtained.

The specific gravity, softness, and oxygen content of this composition were measured. The results are listed in Table 1 and are nine different results. Notes to Table 1 (1) Reaction product of phenol and formalin using alkali hydroxide as a catalyst (2) Hisolite H-32 manufactured by Showa Light Metal Co., Ltd. (3) Asahi Glass Co., Ltd. AFR1001 (4) manufactured by Nippon Asbestos Rika Co., Ltd. Asbestos 60 (5) Kynor KF g 2-B T (6) manufactured by Nihon Kynor Co., Ltd. Whiten B (7) manufactured by Shiraishi Kogyo Co., Ltd. (8) JIS KOO 61 water displacement method (8) JISA5752
(Load: 150g, 5s@elSj value) According to K (9) According to JIS K7201 As detailed above, according to the present invention, the material does not harden at room temperature and exhibits an arm-like shape, gradually hardens when heated at a low temperature, and hardens when heated at a high temperature. Because it can be assimilated, it is extremely useful for filling gaps between electric wires and cables that pass through floors, walls, etc.

Applicant's agent: Patent attorney Suzue Takehiko-679-

Claims (1)

[Claims] Mixing 100 parts by weight of a liquid resol type phenolic resin, 200 to 600 parts by weight of a water-insoluble inorganic filler having water of hydration, and 20 to 100 parts by weight of a flame-retardant or non-flammable fiber material. Features of fireproof note-like composition