JPS628475B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to improvements in fireproof putty, and particularly to fireproof putty with extremely excellent fireproof properties. Conventionally, it has been common practice to maintain sealing properties by filling putty into the gap between the window glass and the window glass. Such putty is usually obtained by mixing an inorganic powder with a curable liquid color vehicle. However, in such conventional putty, if the organic material part burns in the event of a fire, the volume shrinks and the sealing effect is lost, and at the same time, the binding effect of the inorganic powder is also lost, making it extremely brittle. There was a problem. On the other hand, in recent years, fire-retardant paint has been applied to the surface of attached cables in order to give them fire-retardant properties, but at wall penetrations,
Since it is generally difficult to apply fire-retardant paints and the sealing effect is far from perfect, there has been a strong desire to develop a putty with fire resistance comparable to fire-retardant paints that can be applied to these areas. The present invention has been made to solve these conventional difficulties, and includes adding a large amount of inorganic filler containing kaolin grafted with aminoalkyltrialkoxysilane or mercaptoalkyltrialkoxysilane to viscous silicone oil. This is used as a base material, and an effective amount of flame retardant and other optional additives are added to this in a total amount equal to or less than the base material, and the softness [penetration] (JIS A 5752) is 5.0. ~12.0
The purpose of the present invention is to provide a fireproofing putty with extremely excellent fireproofing properties adjusted to mm. In the present invention, the above-mentioned silicone oil may be used alone as a viscous component, but it can also be used in combination with other flame-retardant viscous polymer substances. The silicone oil used in the present invention includes:
Flame-retardant silicone oil of about 500 to 12,000 centistokes (25°C) is suitable. In addition, as the inorganic filler used in the present invention,
Aluminum hydroxide, talc, clay, charcoal,
Examples include asbestos short fibers, carbon short fibers, rock wool short fibers, talc treated with silane coupling, clay, kaolin grafted with aminoalkyltrialkoxysilane, mercaptoalkyltrialkoxysilane, etc. Among these, kaolin grafted with aminoalkyltrialkoxysilane or mercaptoalkyltrialkoxysilane is always used. The silane component of these kaolins is carbonized by the heat of a fire, forming a strong carbonized heat insulating layer. Among other inorganic fillers, aluminum hydroxide is suitable because it releases bound water and prevents the temperature of the coating film from rising due to the heat generated during a fire. The amount of inorganic filler added is based on silicone oil.
A range of 200 to 700 parts by weight per 100 parts by weight is suitable, particularly a range of 300 to 500 parts by weight. Furthermore, in the present invention, since silicone oil contains some flammable hydrocarbon groups, an effective amount of flame retardant is blended. As the flame retardant, known flame retardants such as antimony trioxide, chlorine type, and bromine type can be used. Furthermore, a carbonized layer-forming agent, a vitreous layer-forming agent, a pigment, an anti-aging agent, etc. can be added to the fireproof putty of the present invention, if necessary. Examples of the carbonized layer forming agent include phenolic resin, urea resin, starch, etc., and examples of the glass forming agent include glass beads, and borate compounds such as zinc borate and barium borate. The amount of the flame retardant and optional additives to be added is preferably such that the total amount is equal to or less than the amount of the base material from the viewpoint of economy and prevention of casting at high temperatures. In addition, the softness of the composition can be adjusted by the above ingredients.
If it is difficult to adjust from 5.0 to 12.0mm,
A plasticizer can also be blended as appropriate. Suitable examples of such plasticizers include flame-retardant plasticizers such as tricresyl phosphate (TOP) and tris-(2,3-dibromopropyl) phosphate. The fire prevention putty of the present invention having the above-described structure has excellent sealing properties and fire prevention properties at high temperatures.In particular, it is made of kaolin grafted with aminoalkyltrialkoxysilane or mercaptoalkyltrialkoxysilane by the heat generated during a fire. The silane component carbonizes to form a strong carbonized heat insulating layer.
Silicone oil decomposes into SiO ₂ and binds the inorganic filler to prevent collapse and improve airtightness. Next, examples will be described.

【table】

【table】

[Table] Fireproof putty was manufactured by kneading the above blending amounts. The obtained fire protection putty has a softness [penetration] of 9.0 to 11.0 mm (JIS A 5752) and an oxygen index of 90.
The above (JIS K 7201) was completed, and a dense sintered body was formed by igniting with a burner.

Claims (1)

[Claims] 1. Per 100 parts by weight of viscous silicone oil,
200 to 700% of an inorganic filler containing kaolin grafted with aminoalkyltrialkoxysilane or mercaptoalkyltrialkoxysilane.
The base material is prepared by adding an effective amount of flame retardant, and the softness [penetration] (JIS A
5752) Fireproof putty characterized by being adjusted to 5.0 to 12.0 mm. 2 The inorganic filler is viscous silicone oil
The fire prevention putty according to claim 1, which is added in an amount of 300 to 500 parts by weight per 100 parts by weight. 3. The viscosity of the silicone oil is 500 to 12,000 centistokes (25°C).
Fire prevention putty as described in item 1 or 2.