JPH06306364A - Fireproof putty composition - Google Patents

Abstract

PURPOSE:To provide a fireproof nonhalogenous putty composition made resistant to softening, peeling off, etc., in a fire namely made excellent in shape stability without detriment to the flame retardancy and application workability as a putty. CONSTITUTION:The composition is one comprising 100 pts.wt. halogen-free liquid polymer, 50-200 pts.wt. fine silicone resin powder, 150-400 pts.wt. metal hydrate, and suitable amounts of assistants such as a plasticizer, an and a fiber, wherein the total amount of the fine silicone resin powder and the metal hydrate is 500 pts.wt. or below.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a putty-like composition for preventing the spread of fire, that is, a fireproof putty, which is applied to a penetration portion of a floor or a wall through which electric wires / cables, plastic pipes, etc. are arranged. It relates to a composition.

[0002]

PRIOR ART AND PROBLEM TO BE SOLVED BY THE INVENTION A fireproof putty composition of this type which has been conventionally used has a large amount of, for example, 4 parts by weight per 100 parts by weight of a liquid polymer containing halogen.
A metal hydrate in an amount of about 00 to 600 parts by weight and a flame retardant such as antimony trioxide or a halogen compound are added to impart a high degree of flame retardancy, and further inorganic or organic fibers are blended as reinforcing fibers. There are many.

However, in recent years, it has become a social problem that a large amount of halogen-based toxic gas and smoke are generated when a composition of this kind burns. Therefore, use of halogen-containing liquid polymers and halogen-based flame retardants is limited.

[0004] For the purpose of improving this, attempts have been made to impart a high degree of flame retardancy only with a liquid polymer containing no halogen and a metal hydrate. However, in this case, it is necessary to add a very large amount of, for example, 800 parts by weight or more of metal hydrate to 100 parts by weight of a liquid polymer containing no halogen,
The obtained fireproof putty composition is hard and poor in workability. Moreover, when trying to soften the composition by adding a large amount of a low molecular weight plasticizer or the like in order to improve the workability, the plasticizer bleeds and the like, so in practice, the plasticizer cannot be added so much that the workability is improved. There was a problem that it could not be improved enough.

Further, in general, an inorganic or organic fiber is added to a fireproof putty composition of this kind for the purpose of preventing deformation or dropping after the construction, but when a fire occurs, the fiber may fall off. It is difficult to prevent the deformation only with fibers, and there was a serious problem that smoke and flame propagated through the penetrations from the gaps of the dropped fireproof putty.

The present invention is a fireproof putty composition which is less likely to soften or fall off during a fire without sacrificing flame retardancy or workability as a putty, that is, excellent in shape stability. In addition, the purpose is to provide a non-halogen type.

[0007]

The fireproof putty composition of the present invention comprises 50 to 200 parts by weight of a silicone resin fine powder and 150 to 400 parts by weight of a metal hydrate with respect to 100 parts by weight of a halogen-free liquid polymer. Parts, the total amount of these silicone resin fine powders and metal hydrates is blended in the range of 500 parts by weight or less.

As the liquid polymer containing no halogen, any liquid polymer which is liquid at room temperature and contains no halogen can be used. Such liquid polymers include liquid polybutadiene, polyisoprene,
There are hydrogenated polyisoprene, polybutene, ethylene propylene and the like. The liquid polymer is not necessarily limited to one made of one of these, and may be a blend of two or more.

The silicone resin fine powder has an excellent effect of improving flame retardancy, and also has an effect of improving the shape maintainability of putty during combustion. When this silicone resin is used in the form of powder, it is well dispersed in the putty, and the effect of improving the above characteristics is more exerted. As the silicone resin fine powder which imparts such an effect, it is desirable to use one having a particle size of 0.5 μm to 100 μm. Among them, those having a particle diameter as small as possible are preferable from the viewpoint of flame retardancy, and particularly, an average particle diameter of 10 μm or less is desirable. Specifically, Trefill R-902, E-500 and the like (trade name, manufactured by Toray Dow Corning Silicone Co., Ltd.) can be used.

Here, the compounding amount of the silicone resin fine powder is 5
The reason for limiting the amount to 0 to 200 parts by weight is that if the amount is 50 parts by weight or less, the effect of maintaining the shape of the putty at the time of burning is not
This is because if the amount is more than the weight part, the putty becomes hard and there is a problem in workability.

Examples of the metal hydrate used in the present invention include aluminum hydroxide and magnesium hydroxide. This metal hydrate is added in addition to the above silicone resin fine powder in order to further improve flame retardancy, and specifically, Hijilite H-42M (Showa Denko KK: trade name) is preferable. . The reason why the content of the metal hydrate is limited to 150 to 400 parts by weight is that if it is 150 parts by weight or less, there is a problem in flame retardancy, and if it is 400 parts by weight or more, the putty becomes hard and there is a problem in workability. To come.

In the present invention, the total amount of the above-mentioned silicone resin fine powder and metal hydrate added is limited to 500 parts by weight or less, because the fire-proof putty composition obtained becomes hard when 500 parts by weight or more, This is because there is a problem in workability.

In addition to the above, it is desirable to add an appropriate amount of a phthalic acid-based or phosphorus-based plasticizer, a phenol-based antiaging agent, and an auxiliary agent such as fiber to the fireproof putty composition of the present invention. .

[0014]

In the fireproof putty composition of the present invention, the silicone resin fine powder is added as a compounding component, the compounding ratio of the silicone resin fine powder is set to a large amount, and the metal hydrate is used in combination at an appropriate compounding ratio. In addition, since the total amount of these ingredients is limited to the specified range, it is possible to greatly improve the shape stability in case of fire while maintaining the high flame retardancy and workability required for fireproof putty. It was

[0015]

EXAMPLES In order to clarify the effects of the present invention, more detailed description will be given along with Examples and Comparative Examples.

Each component was mixed in the ratio shown in Table 1 to obtain 7
Mix in a conventional manner with a 5 liter kneader and
4, putty compositions of Comparative Examples 1 to 5 and a conventional example were obtained.

The compositions were evaluated for flame retardancy, shape stability and workability.

(Flame retardancy) Flame retardancy was measured by the oxygen index method of JIS K-7201.

(Shape stability) The shape stability was judged by the following method. The obtained putty composition was filled in a cylindrical body having a height of 5 cm and a diameter of 10 cm, heated from 800 to 900 ° C. from below with a Bunsen burner, and the state of dropout of the putty after 20 minutes was confirmed by the following judgment. ◎ ... Maintains the initial shape and does not fall off. ○… Slightly deformed but does not fall off. △: The shape collapses when touched. ×: Dropping was observed during combustion.

(Workability) A fireproof putty composition having a thickness of 10
The workability was evaluated by constructing a sheet-shaped product having a size of about cm at a place required at the construction site and determining the result as follows. ◎ ... Maintains softness that is easy to cut and has good workability. ○… Slightly difficult to cut, but good workability. Δ: Hard and difficult to cut, and poor workability. ×: It cannot be cut and work is extremely difficult.

[0021]

[Table 1]

As shown in Table 1, the compositions of Examples are good in all the evaluation items, whereas the compositions of Comparative Examples and Conventional Examples in which the compounding ratio of the components marked with * are different from the present invention are Either performance (especially the characteristics marked with *) is inferior and not practical.

[0023]

In the fireproof putty composition of the present invention, the silicone resin fine powder is added as a compounding component, and the compounding ratio of the silicone resin fine powder is set to a large amount, and the metal hydrate is added at an appropriate compounding ratio. Since they were used in combination, and the total amount of these compounds was set to fall within the predetermined range, while maintaining a high level of flame retardancy and construction workability required for fireproof putty, despite being a non-halogen type, We were able to greatly improve the shape stability in the event of a fire.

Claims (1)

[Claims] 1. A silicone resin fine powder in an amount of 50 to 200 parts by weight and a metal hydrate in an amount of 150 to 400 parts by weight based on 100 parts by weight of a halogen-free liquid polymer. A fire-proof putty composition, characterized in that the total amount thereof is 500 parts by weight or less.