JPH06145529A - Putty composition for fire prevention - Google Patents

Abstract

PURPOSE:To provide the title composition which can be used to seal an opening through which a wire, a cable or the like penetrates a floor or a wall for preventing a fire from propagating through the opening. CONSTITUTION:The composition mainly consists of a liquid polymer and 350-1000 pts.wt., per 100 pts.wt. the polymer, filler comprising a compound of the formula: MgSO4.5Mg(OH)2.3H2O. This composition has high flame retardancy and good workability in application while retaining good shape stability.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a putty-like fire-preventing composition used for sealing these places in order to prevent the spread of flames from floor penetrations or wall penetrations of electric wires, cables, etc. It is about.

[0002]

2. Description of the Related Art Fireproof putty compositions of this type that have been used conventionally are based on liquid polymers, on which inorganic fillers such as metal hydrates, flame retardants such as antimony trioxide and halogen compounds, Furthermore, as a main component, a mixture of inorganic fibers such as asbestos and glass fibers is used as a reinforcing fiber,
Many of these contain a plasticizer and an antiaging agent. However, in these fireproof putty compositions, the asbestos used as the reinforcing fiber has a problem as a carcinogen, and the glass fiber has a problem of skin irritation,
At present, organic fibers such as phenol fibers and polynosic fibers, carbon fibers and the like are used as reinforcing fibers. However, since these reinforcing organic fibers are rigid and strong, the workability of the kneading step for forming a uniform composition of all the components is deteriorated when a large amount is filled, and the composition is used. The construction workability of is also reduced. On the other hand, in the case of a small amount of filling, the resulting composition does not have a sufficient reinforcing effect, so that the part where the composition is applied may cause problems such as softening and falling out after the installation or at the time of fire. There was a problem in shape stability over time. For this reason, attempts have been made to improve the shape stability of the composition over time by combining and compounding a small amount of solid rubber, flat talc, etc. into the composition, but this is not always sufficient.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a shape stability that does not cause softening or dropping at a working place after construction without sacrificing flame retardancy and workability as a fireproof putty composition. It is an object of the present invention to provide an improved fireproof putty composition.

[0004]

The fireproof putty composition of the present invention comprises a liquid polymer and MgSO ₄ .5Mg (OH) ₂
A filler composed of a compound represented by 3H ₂ O as a main component, and the filling amount of the filler is 350 to 1000 parts by weight with respect to 100 parts by weight of the liquid polymer. In addition to the above, it is desirable to add an appropriate amount of a commonly used auxiliary filler such as a phthalic acid-based or phosphorus-based plasticizer and a phenol-based antiaging agent to the composition of the present invention.

The liquid polymer used in the present invention may be any liquid polymer at room temperature, for example, liquid polybutadiene, polyisoprene, polybutene,
Polychloroprene or the like is used, but it is not always necessary to use one kind, and a blended product of two or more kinds may be used.

Further, the following formula used in the present invention: MgSO ₄
The compound represented by 5Mg (OH) ₂ .3H ₂ O is a fibrous inorganic substance, and is commercially available from Ube Industries, Ltd. under the trade name of "Mosheiji". In the present invention, the amount of the filler to be filled in the composition is the liquid polymer 10
The reason for defining the range of 350 to 1000 parts by weight with respect to 0 parts by weight is that the flame retardancy of the obtained composition is insufficient at a filling amount of less than 350 parts by weight, and when the filling amount exceeds 1000 parts by weight. This is because the obtained composition becomes too hard and the workability of construction is deteriorated.

[0007]

The fireproof putty composition of the present invention is a fireproof putty composition due to the presence of a filler made of a compound represented by the following formula, MgSO ₄ .5Mg (OH) ₂ .3H ₂ O, filled in an appropriate amount. It was possible to impart shape stability to the composition after application, without sacrificing the flame retardancy and the workability of the above, and not causing softening or dropping at the application site.

[0008]

EXAMPLES Examples of the effect of the fireproof putty composition of the present invention,
A comparative example and a conventional example will be described. Examples 1 to 4, Comparative Examples 1 to 3 and Conventional Example Each of the compounding ingredients as shown in Table 1 was kneaded in a 75 liter kneader by a conventional method, and each fireproof putty composition of Examples, Comparative Examples and Conventional Examples The thing was prepared. Each of the prepared compositions was evaluated for flame retardancy, construction workability, and shape stability. The obtained results are also shown in Table 1.

[0009]

[Table 1]

(1) Flame retardancy was measured by the oxygen index method of JIS K-7201. (2) The workability of this type of fireproof putty composition is 1
It was judged based on the following in consideration of being formed into a sheet of about 0 cm, and being packed or wound around a necessary place at the construction site. It is easy to cut at the time of construction, and it is easy to fill and wind at the construction site, so it is soft. It is difficult to cut a little, but the workability of filling and winding the construction site is good. It is hard, difficult to cut, and the workability of filling and winding the construction site is poor. It cannot be cut, and it is very difficult to fill and wind the construction site ... (3) The shape stability was judged by the following. Outer diameter 10c
A cable having a length of 50 m and a length of 50 cm was coated with a fireproof putty composition having a thickness of 30 mm while leaving 10 cm at both ends, and it was stood in a constant temperature bath at 40 ° C. and held to observe the change in the shape of the coating layer. No change in shape for more than 1 month ... ◎. It changed a little within 10 months from 10th, but it doesn't progress any more ... ○. It starts to change within 1 to 10 days, then it gradually becomes large, and finally drops off ... △. It deforms and falls off within 1 day after the start of the test ... ×.

As is clear from Table 1, the fireproof putty compositions of the examples are good in all the evaluation items of flame retardancy, workability and shape stability, while Comparative Examples 1 to 3 And in the fireproof putty composition of the conventional example, flame retardancy, workability,
Performance is inferior in any of the evaluation items of shape stability.

[0012]

INDUSTRIAL APPLICABILITY The fireproof putty composition of the present invention maintains a high level of flame retardancy and good workability while maintaining good shape stability, and its practical value is great. It is a thing.

Claims (1)

[Claims] 1. A liquid polymer and MgSO ₄ .5Mg (O
H) A filler containing a compound represented by ₂ · 3H ₂ O as a main component, and the filling amount of this filler is 100
350-1000 parts by weight with respect to parts by weight, a fireproof putty composition.