JPH1060448A - Fireproofing seal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproofing seal composition capable of giving a foaming.thermosetting fireproofing seal material, exhibiting excellent fireproofing characteristic even without filling a fireproof filler in the inside of an opening for penetrating a cable by adding each a specific amount of a metal hydroxide and a crosslinking agent to a crosslinkable liquid polymer. SOLUTION: This fireproofing seal composition is composed of (A) 100 pts.wt. of a liquid polymer (e.g. chloroprene rubber, acrylonitrile-butadiene rubber or silicone rubber) in which a crosslinking reaction proceeds by a crosslinking agent in air at a high temperature blended with (B) >=200 pts.wt. of a metal hydroxide (e.g. aluminum hydroxide or magnesium hydroxide) and added with (C) >=30 pts.wt. of a crosslinking agent [e.g. a sulfur (compound), a metal oxide or an organic peroxide]. The component C of the composition is preferably a mixture of a metal oxide with an organic peroxide, and the foaming.expansion and heat curing of the sealing material are sufficiently performed and a cable burning in the vicinity of a through hole can be minimized by this blending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam / thermosetting fireproof seal material for a cable laid in a floor or a wall through hole, and more particularly to a fireproof seal composition.

[0002]

2. Description of the Related Art It is necessary to provide a sufficient fire prevention seal to prevent the spread of fire due to the spread of cables on the floor and wall penetrations of buildings and the like. Building Standard Law Construction Example 112 Article 15
The construction method that has fire protection performance equivalent to or higher than that specified in Paragraph 1 and Article 129-2, Paragraph 1, Item 7 has been evaluated by the Japan Building Center.

[0003] A representative method of construction that has received this rating is a combination of a fire-resistant partition plate (calcium silicate plate), a fire-resistant filler (rock wool), and a fire-proof seal. A performance that passes a 2-hour fire resistance test according to A1304 is obtained.

[0004]

However, it takes a lot of work to fill a fireproof filler such as rock wool into the opening of the cable penetrating portion, and since rock wool is easily scattered in a fibrous form, In addition to deteriorating the work environment, there are concerns about the effects on the human body.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a fireproof seal composition of a fireproof sealant having excellent fireproof properties without filling a fireproof filler in an opening of a cable penetration portion.

[0006]

In order to solve the above-mentioned problems, the invention of claim 1 is to provide a metal polymer having a weight ratio of 200 parts by weight to 100 parts by weight of a liquid polymer in which a crosslinking reaction proceeds at a high temperature in air. Parts or more, and at least 30 parts by weight of a single crosslinking agent alone is added.

According to a second aspect of the present invention, the cross-linking agent is one selected from the group consisting of sulfur and sulfur compounds, metal oxides, and organic peroxides, or a mixture thereof. Things.

[0008] The invention of claim 3 is to provide 100 parts by weight of a liquid polymer in which a crosslinking reaction proceeds with a crosslinking agent at a high temperature in the air.
A metal hydroxide is mixed in an amount of 200 parts by weight or more, and a crosslinking agent composed of an organic peroxide and a metal oxide is added in an amount of 30 parts by weight or more. The reason for limiting the above numerical range is described below.

The reason for limiting the mixing of the metal hydroxide to 200 parts by weight or more to 100 parts by weight of the liquid polymer is that if the mixing amount of the metal hydroxide is less than 200 parts by weight, the temperature of the sealing material itself rises rapidly. This is because the effect of suppressing the temperature rise of the cable is small. The reason that at least 30 parts by weight of the crosslinking agent alone is limited to 100 parts by weight of the liquid polymer is that the amount of the crosslinking agent alone is less than 30 parts by weight, and that the sealing material is used in the fire resistance test. This is because foam expansion is insufficient and thermal curing is also insufficient, and cable burning near the through hole is large.

According to the above construction, at least 200 parts by weight of a metal hydroxide is mixed with 100 parts by weight of a liquid polymer in which a crosslinking reaction proceeds with a crosslinking agent at a high temperature in air.
Since at least 30 parts by weight of the cross-linking agent alone is added alone, a fireproof seal composition of a fireproof sealant having excellent fireproof properties can be obtained without filling the fireproof filler in the cable penetration opening.

[0011]

Embodiments of the present invention will be described below.

The present inventors have conducted intensive studies with the aim of simplifying the fire prevention method and improving safety during construction. As a result, by mixing and adding a metal hydroxide and a cross-linking agent to the liquid polymer, a In the above, the sealing material expands and expands due to the decomposition gas of the cross-linking agent, and is thermally cured, thereby suppressing cracks and falling off of the seal, suppressing the invasion of flame, and minimizing cable burning near the through hole. I found that I can do it.

The fire-resistant seal composition of the present invention comprises a liquid polymer 100 in which a crosslinking reaction proceeds with a crosslinking agent at a high temperature in the air.
200 parts by weight or more of a metal hydroxide is mixed with at least 30 parts by weight of a crosslinking agent alone. A fireproof seal material is obtained from the fireproof seal composition.

FIG. 1 shows an example of applying a fireproof seal material comprising the fireproof seal composition of the present invention to a floor penetrating portion.

As shown in FIG. 1, a through-hole (for example, a circular hole) 2a having a predetermined diameter is formed in the floor 2, and a cylindrical (for example, cylindrical) metal having one end closed in the through-hole 2a. The frame 3 is fitted with the closed end down. A hole 3a is formed at the center of the closed end of the metal frame 3. A flange 3b is formed at the open end of the metal frame 3.

A calcium silicate plate 4 having the same diameter as the inside diameter of the metal frame 3 and having a hole 4a formed in the center is fitted into the inside of the metal frame 3, and the metal frame 3 Place at the bottom of the Further, a calcium silicate plate 5 having the same diameter as the outer diameter of the flange portion 3b and having a hole 5a formed in the center portion is arranged on the flange portion 3b of the metal frame 3. Bolt holes 7 are formed in the flange 3b of the metal frame 3 and the peripheral edge of the calcium silicate plate 5, and the flange 3b and the calcium silicate plate 5 are flange-connected by anchor bolts 8.

In the holes 4a of the calcium silicate plate 4 and the holes 5a of the calcium silicate plate 5, a plurality of holes (three in the figure) are provided.
Is inserted. The gaps between the holes 4a and 5a of the calcium silicate plates 4 and 5 and the cables 6 and the gaps between the cables 6 are filled with the fireproof seal material 1a. Further, a fireproof seal material 1b is provided on the outer periphery of each cable 6 near the boundary between each cable 6 and the fireproof seal material 1a.
May be provided.

FIG. 2 shows an example in which a fireproof seal material comprising the fireproof seal composition of the present invention is applied to a wall penetrating portion. still,
The same members as those in FIG. 1 are denoted by the same reference numerals.

As shown in FIG. 2, a through hole 10a having a predetermined diameter is formed in the wall 10. On both sides of the wall 10, calcium silicate plates 9, 9 having a hole 9a in the center are arranged so as to cover the through hole 10a of the wall 10. At the periphery of the calcium silicate plates 9, 9, bolt holes 7
Is formed, and the calcium silicate plates 9 and 9 are connected to the wall 10 with anchor bolts 8.

Holes 9a, 9a in calcium silicate plates 9, 9
, A plurality of cables 6 are inserted. The gaps between the holes 9a, 9a of the calcium silicate plates 9, 9 and the cables 6 and the gaps between the cables 6 are filled with the fireproof sealing material 1.
Fill with a. In addition, each cable 6 and the fireproof seal material 1a
A fireproof seal member 1b may be provided on the outer periphery of each cable 6 in the vicinity of the boundary between the two.

Examples of the liquid polymer constituting the fire-proof seal composition of the present invention include, for example, one selected from chloroprene rubber, acrylonitrile-butadiene rubber, and silicone rubber, or a mixture thereof. However, it may be used in combination with another polymer (for example, polybutene, polybutadiene, polyisoprene, etc.). However, the weight ratio of the other polymer to 100 parts by weight of the liquid polymer is preferably 50 parts by weight or less from the viewpoint of fire resistance.

The metal hydroxide constituting the fire-resistant seal composition of the present invention includes, for example, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, hydrotalcite, magnesium oxosulfate, hydrated magnesium carbonate, hydrated One kind selected from calcium carbonate and the like, or a mixture thereof, may be mentioned, but not particularly limited thereto.

The crosslinking agent constituting the fire-proof seal composition of the present invention includes sulfur and one or more compounds selected from sulfur compounds, metal oxides and organic peroxides, and mixtures thereof. Oxides are preferred. Examples of the organic peroxide include dicumyl peroxide, 1,3-bis (tert-butylperoxyisopropyl) benzene,
Examples thereof include 1-di-tert-butylperoxy 3,3,5 trimethylcyclohexane and 1,1-di-tert-butylperoxycyclohexane.

The fire-resistant seal composition of the present invention may contain an antioxidant, a plasticizer, a rubber softener, a reinforcing agent such as carbon black or fiber, a filler, a foaming agent, a lubricant, a flame retardant, a coloring agent, and a fungicide. Needless to say, an agent or the like may be appropriately added.

Next, another embodiment of the present invention will be described.

In another embodiment, the fire-resistant seal composition is prepared by mixing 200 parts by weight or more of a metal hydroxide with 100 parts by weight of a liquid polymer in which a crosslinking reaction proceeds with a crosslinking agent at a high temperature in air. It is obtained by adding at least 30 parts by weight of a crosslinking agent comprising an oxide and a metal oxide.

By using a mixture of a metal oxide and an organic peroxide as a cross-linking agent constituting the fire-proof seal composition, foaming expansion and thermal curing of the seal material can be sufficiently performed by a decomposition gas of the cross-linking agent in a fire. This is done to minimize cable burnout near the through hole.

[0028]

【Example】

(Example 1) Liquid chloroprene rubber (number average molecular weight:
2,500, viscosity: 50,000 cps (25 ° C.), 100 parts by weight of liquid polymer, 300 parts by weight of aluminum hydroxide as metal oxide (average particle size:
2 μm, surface treatment with stearic acid)
40 parts by weight of dicumyl peroxide (D
CP) and 40 parts by weight of magnesium oxide, 3 parts by weight of tribasic lead sulfate as stabilizer, 3 parts by weight of bisphenol A diglycidyl ether as stabilizer, 20 parts by weight of antimony trioxide as flame retardant auxiliary, filling 30 as an agent
0 parts by weight of talc (average particle size: 1.5 μm) and 80 parts by weight of dioctyl phthalate as a plasticizer were added to prepare a fireproof seal composition.

Example 2 80 parts by weight of liquid chloroprene rubber and 20 parts by weight of liquid polybutene (number average molecular weight: 1,400, viscosity: 28,000 cps (40
C)), with 350 parts by weight of aluminum hydroxide as a metal oxide, 50 parts by weight of DCP and 40 parts by weight of magnesium oxide and a stabilizer as a metal oxide. 3 parts by weight of tribasic lead sulfate, 3 parts by weight of bisphenol A diglycidyl ether as a stabilizer, 20 parts by weight of antimony trioxide as a flame retardant, 300 parts by weight of talc as a filler, and 70 parts as a plasticizer. A part of dioctyl phthalate was added by weight to prepare a fireproof seal composition.

Example 3 10 parts consisting of 90 parts by weight of liquid chloroprene rubber and 10 parts by weight of liquid polybutene
0 parts by weight of liquid polymer, 40 as metal oxide
0 parts by weight of magnesium hydroxide (average particle size: 0.8μ)
m, surface treatment with oleic acid), 65 parts by weight of DCP and 40 parts by weight of magnesium oxide as a crosslinking agent, 3 parts by weight of tribasic lead sulfate as a stabilizer, and 3 parts by weight of a stabilizer. Bisphenol A diglycidyl ether, 20 parts by weight of antimony trioxide as a flame retardant, 250 parts by weight of talc as a filler, and 80 parts by weight of dioctyl phthalate as a plasticizer were added to prepare a fireproof seal composition.

(Comparative Example 1) 10 consisting of liquid polybutene
For 0 parts by weight of liquid polymer, 35 as metal oxide
0 parts by weight of aluminum hydroxide, 55 parts by weight of DCP and 40 parts by weight of magnesium oxide as a crosslinking agent, 3 parts by weight of tribasic lead sulfate as a stabilizer,
3 parts by weight of bisphenol A diglycidyl ether as a stabilizer, 20 parts by weight of antimony trioxide as a flame retardant, 350 parts by weight of talc as a filler, and 70 parts by weight of dioctyl phthalate as a plasticizer are added to provide a fireproof seal. A composition was made.

Comparative Example 2 320 parts by weight of aluminum hydroxide was mixed as a metal oxide with 100 parts by weight of a liquid polymer made of liquid chloroprene rubber, and 20 parts by weight of DCP and 40 parts as a crosslinking agent. Parts by weight of magnesium oxide, 3 parts by weight of tribasic lead sulfate as a stabilizer, 3 parts by weight of bisphenol A diglycidyl ether as a stabilizer, 20 parts by weight of antimony trioxide as a flame retardant auxiliary, and 320 parts by weight as a filler Parts of talc and 70 parts by weight of dioctyl phthalate as a plasticizer were added to prepare a fireproof seal composition.

Comparative Example 3 10 parts consisting of 80 parts by weight of liquid chloroprene rubber and 20 parts by weight of liquid polybutene
0 parts by weight of liquid polymer, 50 as metal oxide
Parts by weight of aluminum hydroxide, 60 parts by weight of DCP and 40 parts by weight of magnesium oxide as a crosslinking agent, 3 parts by weight of tribasic lead sulfate as a stabilizer, and 3 parts by weight of bisphenol A as a stabilizer. Diglycidyl ether, 20 parts by weight of antimony trioxide as a flame retardant aid, 500 parts by weight of talc as a filler, and 70 parts by weight of dioctyl phthalate as a plasticizer were added to prepare a fireproof seal composition.

Table 1 shows the compositions of the fireproof seal compositions of Examples 1 to 3 and Comparative Examples 1 to 3.

[0035]

[Table 1]

Each of the fire-resistant seal compositions shown in Table 1 was kneaded with a 12-inch roll maintained at room temperature to prepare a putty-like fire-proof seal material. A cable penetration portion was formed using each of the fireproof seal materials, and a fireproof test was performed.

FIG. 3 is a longitudinal sectional view showing a state where the cable penetration portion is attached to the upper part of the refractory test furnace. The same members as those in FIG. 1 are denoted by the same reference numerals.

As shown in FIG. 3, a calcium silicate plate (400 mm × 500 mm) 4 having a thickness t and a calcium silicate plate 5 slightly larger than the calcium silicate plate 4 are provided at a distance d. Holes 4 in calcium silicate plates 4, 5
a, 5a are formed three each. Each hole 4
a, a 5a, conductor cross-sectional area of 325 mm ² cables (C
V cable) 6. Here, t is 25 m
m and d are 175 mm.

Holes 4a, 5a of calcium silicate plates 4, 5
The gap between the cable and the cable 6 is overlaid with the fireproof seal material 1a made of the fireproof seal compositions of Examples 1 to 3 and Comparative Examples 1 to 3. The overfilling of the hole 4a of the calcium silicate plate 4 is performed on the surface of the calcium silicate plate 5 side, and the overfilling of the hole 5a of the calcium silicate plate 5 is performed on the surface on the opposite side of the calcium silicate plate 4. Do. Thereafter, the extension of the cable 6 on the side of the calcium silicate plate 4 and a part of the extension of the cable 6 on the side of the calcium silicate plate 5 are covered and supported by the cable rack 12, and the floor penetrating structure 11 is moved. Make it. Here, the build-up height of the fireproof sealing material 1a is 50 mm.

The penetrating floor structure 11 with the calcium silicate plate 4 side down is attached to a furnace wall 13 having an opening of 400 mm × 500 mm. A ribbon burner 14 is provided below the furnace wall 13.

In the test apparatus having the above-described configuration, the ribbon burner 14 is ignited, and a fire resistance test is performed for 2 hours in accordance with the provisions of JIS A1304, and the cable at the point A which is the boundary between the calcium silicate plate 5 and the cable 6 is measured. 6 and the surface temperature of the calcium silicate plate 5 on the side opposite to the calcium silicate plate 4 were measured. At this time,
According to the rating standards of the Japan Building Center, those with a cable sheath surface temperature of 340 ° C or less and a calcium silicate plate surface temperature of 260 ° C or less pass.
Those that did not conform to this standard were rejected. Table 2 shows the results.

[0042]

[Table 2]

As shown in Table 2, in the fire-proof seal materials made of the fire-proof seal compositions of Examples 1 to 3, the surface temperature of the cable sheath was 250 ° C. or less, and the evaluation standard was 340 ° C. or less. Was satisfied. In addition, the surface temperature of the upper calcium silicate plate was 150 ° C. or less in each case, satisfying the evaluation criteria of 260 ° C. or less. That is, Examples 1 to
All of the fire-proof seal materials made of the fire-proof seal composition of No. 3 satisfied the rating standards of the Japan Building Center, and passed the evaluation.

On the other hand, in the fire-proof seal material comprising the fire-proof seal composition of Comparative Example 1, the surface temperature of the upper calcium silicate plate was 203 ° C., and the evaluation standard was 26.
The standard of 0 ° C. or less was satisfied. However, since the liquid polymer is composed of only liquid polybutene that does not crosslink in the air, the surface temperature of the cable sheath is 380 ° C., which does not satisfy the criteria of 340 ° C. or less, which is the evaluation standard. In other words, both did not satisfy the rating standards of the Japan Building Center, and the evaluation was rejected.

Further, in the fire-proof seal material comprising the fire-proof seal composition of Comparative Example 2, the surface temperature of the upper calcium silicate plate was 190 ° C., which satisfied the evaluation standard of 260 ° C. or less. However, since the addition amount of dicumyl peroxide, which is an organic peroxide, is 20 parts by weight and the addition amount of the cross-linking agent is smaller than a specified range (at least 30 parts by weight of a single cross-linking agent alone), The surface temperature is 345 ° C., which does not satisfy the evaluation standard of 340 ° C. or less. In other words, both did not satisfy the rating standards of the Japan Building Center, and the evaluation was rejected.

Further, in the fire-proof seal material made of the fire-proof seal composition of Comparative Example 3, the surface temperature of the upper calcium silicate plate was 215 ° C., which satisfied the evaluation standard of 260 ° C. or less. However, the mixing amount of aluminum hydroxide which is a metal hydroxide is 50 parts by weight,
The mixing amount of the metal hydroxide is within the specified range (200 parts by weight or more)
Less, the surface temperature of the cable sheath is 407 ° C
Do not satisfy the criteria of 340 ° C. or lower of the evaluation standard. In other words, both did not satisfy the rating standards of the Japan Building Center, and the evaluation was rejected.

[0047]

In summary, according to the present invention, the following excellent effects are exhibited.

(1) A fireproof seal composition of a fireproof sealant having excellent fireproof properties can be obtained without filling a fireproof filler in the cable penetration opening.

(2) Since there is no need to fill the opening of the cable penetration portion with the refractory filler, the workability and dismantling workability are good, and the working environment does not deteriorate.

[Brief description of the drawings]

FIG. 1 is an application example of a fireproof seal material comprising the fireproof seal composition of the present invention to a floor penetration.

FIG. 2 is an application example of a fire-proof seal material comprising the fire-proof seal composition of the present invention to a wall penetrating portion.

FIG. 3 is a vertical cross-sectional view when a cable penetration part is attached to an upper part of the fireproof test furnace in the embodiment.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location C08L 101/00 C08L 101/00 C09K 3/10 C09K 3/10 Z E04B 1/94 E04B 1/94 G (72) Inventor Toshimasa Hatta 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Plant, Hitachi Cable Co., Ltd. (72) Inventor Kazuhiko Kobayashi 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Hitachi Inside the Hidaka Factory of Electric Wire Co., Ltd. (72) Kunio Kimura Inventor 5-1-1, Hidakacho, Hitachi City, Ibaraki Prefecture Inside Hitachi Cable FM Co., Ltd.

Claims (3)

[Claims] 1. A metal hydroxide is added to 100 parts by weight of a liquid polymer in which a crosslinking reaction proceeds with a crosslinking agent at a high temperature in air.
A fireproof seal composition characterized by being mixed with at least 00 parts by weight and adding at least 30 parts by weight of a crosslinking agent alone. 2. The fire-resistant seal composition according to claim 1, wherein the crosslinking agent is one selected from the group consisting of sulfur and sulfur compounds, metal oxides, and organic peroxides, or a mixture thereof. 3. A metal hydroxide is added to 100 parts by weight of a liquid polymer in which a crosslinking reaction proceeds with a crosslinking agent at a high temperature in air.
A fire-resistant seal composition, which is mixed with at least 00 parts by weight and further added at least 30 parts by weight of a crosslinking agent comprising an organic peroxide and a metal oxide.