RU2249658C1 - Fire protection barrier for cable-way - Google Patents

Abstract

FIELD: building materials, particularly for filling cavities, namely cable driving areas, in buildings and structures, for instance in tunnels, to prevent fire spreading through above structures.

SUBSTANCE: barrier is formed of rockwool panel covered with fire-inhibiting composition. Fire-inhibiting composition includes the following components taken in % by weight: acrylic dispersion 11.0 - 33.0, pentaerythrite 1.8 - 21.8, titanium dioxide 0.2 - 5.0, melamine 3.7 - 22.0, ammonium polyphosphate 13.5 - 33.5, ethylene glycol 0.2 - 10.0, glycerin 0.2 - 3.0, cellulose ester 0.1 - 5.0, plasticizer 1.0 - 3.5, remainder - water. Fire-inhibiting composition layer thickness in dry condition is 0.8 - 1.0 mm. Panel covered with above composition is placed cable-way so that summary thickness of "panel-interior space-panel" zone is not less than 300 mm.

EFFECT: increased fire-protection due to provision of fire-resistance rating of not less than 1.5 hours, reduced toxity thereof.

3 cl

Description

The invention relates to the building materials industry and can be used to fill voids, namely cable penetrations, in the building structures of buildings and structures, including transport, for example, such as tunnels, to ensure that flame propagation is limited over them.

Known fireproof barrier for exhaust penetrations - channels, made using including mineral wool boards, as well as a protective coating of roofing steel, solid or dissected metal sheet, a layer of plaster or crumpled clay, sand-weathered, non-combustible fabric, such as fiberglass (RF patent No. 2194130, E 04 B 1/94, 2002).

The closest analogue is a barrier for cable penetrations, made in free form or in the form of pillows, of, wt.%: Granular and / or fibrous filler from the group: kieselguhr, expanded clay, pumice, chalk, expanded perlite and vermiculite, inorganic - mineral - fibers, 90-95, and a binder - such as polyamide, high or low density polyethylene, polypropylene, polystyrene, polyoxyethylene, as well as thermosetting resins - urea-formaldehyde, melamine-formaldehyde, monomelamine phosphate, with additives - silicone and / or ineralnymi, coated with a flame retardant (Patent DE №3536625, E 04 B 1/94, 1987).

The disadvantage is the low efficiency in the fire protection of cable penetrations and the high toxicity of substances released during combustion.

The objective of the invention is to increase the efficiency of fire protection by increasing the fire resistance of the cable barrier and reducing the toxicity of combustion products, reducing smoke generating ability.

This problem is solved in that in the fireproof barrier for cable penetrations made of a pillow using mineral wool coated with a flame retardant, the mineral wool is molded into a mineral wool slab, and as the specified composition, a fireproof composition containing, wt.%:

Acrylic dispersion 11.0-33.0

Pentaerythritol 1.8-21.8

Titanium dioxide 0.2-5.0

Melamine 3.7-22.0

Ammonium Polyphosphate 13.5-33.5

Ethylene glycol 0.2-10.0

Glycerin 0.2-3.0

Cellulose ether 0.1--5.0

Plasticizer 1.0-3.5

Water rest

Moreover, the thickness of the layer from the specified composition in the dry state is 0.8-1 mm, the mineral wool board painted with this composition is installed in the cable penetration to ensure the total thickness of the “indicated plate - interior space - said plate” section is at least 300 mm.

The invention is as follows.

Use mineral wool plates of grade 150 with a thickness of 50 mm, TU 5762-010-04001485-96 with changes No. 1.

The fire-retardant composition “KL-1” containing an acrylic dispersion of the “Diakam” brand - TU 2241-039-07507802-2001, which is a product of the copolymerization of butyl acrylate, methacrylic (acrylic) acid and styrene. Acrylic dispersion of the brand "Diakam" is a milky white liquid without coagulum and mechanical impurities.

Melamine blowing agent Ethylene glycol

Plasticizer - the usual ones used in this capacity for acrylic dispersions are dibutyl phthalate, tricresyl phosphate and others. Pentaerythritol - GOST 9286-89, which is a white crystalline powder without impurities visible to the naked eye, is allowed gray-blue or yellowish.

Titanium dioxide - GOST 9808-84, TU 6-10-1650, filler, highly effective universal white pigment. Ammonium polyphosphate - TU 6-08-495-81, TU 6-47-15-90, flame retardant. Glycerin - brand VUK-037.

Cellulose ether - TYLOSA grades EC7, VHR - carboxymethyl cellulose, ЕНМ - hydroxyethyl cellulose, FL methylhydroxyethyl cellulose, in the form of a fine-grained powder from white to cream color.

On the pre-cleaned surface of the cable, either single or in the form of bundles or other combinations, the specified composition “KL-1” is applied, the mineral wool plate is cut according to the configuration of the cable penetration, the resulting cut parts of the plate are painted in one, two steps from the side facing the inside of the penetration fire-retardant composition “KL-1” with a flow rate of 1.2-1.3 kg / m, cover - paint all the end surfaces of the plate parts, paint the inner surfaces of the cable penetration at a distance of at least 100 mm from the outside plate, after mounting the plate edge into the hole tunneling stained the outside plate parts and the cable extending over two boundary plates, three layers of 0.8-1.0 mm thickness. It is possible to install the specified plate several times along the length of the penetration, at least two times, with a total distance of “plate - interior space - plate” of at least 300 mm.

When using a flame retardant composition, wt.%: Titanium dioxide 4.9, pentaerythritol 10.8, ammonium polyphosphate 22.5, melamine 14.7, ethylene glycol 2.1, acrylic dispersion 21, glycerol 2.1, methyl hydroxyethyl cellulose 0.5 dibutyl phthalate 1.8, water 20.6. the barrier provides an increase in the efficiency of fire protection of cable penetrations by increasing the limit of its fire resistance for at least 2 hours and reducing toxicity.

Claims (3)

1. The barrier for cable penetrations made of a pillow made of fiberglass, filled with mineral wool coated with a flame retardant, characterized in that the mineral wool is molded into a mineral wool plate, and as the specified composition use a flame retardant composition containing, wt.%: Acrylic dispersion 11.0-33.0 Pentaerythritol 1.8-21.8 Titanium dioxide 0.2-5.0 Melamine 3.7-22.0 Ammonium Polyphosphate 13.5-33.5 Ethylene glycol 0.2-10.0 Glycerin 0.2-3.0 Cellulose ether 0.1-5.0 Plasticizer 1.0-3.5 Water Else 2. The barrier according to claim 1, characterized in that the thickness of the layer of the specified composition in the dry state is 0.8-1 mm. 3. The barrier according to claim 1 or 2, characterized in that the mineral wool slab coated with the specified composition is installed in the cable penetration to ensure the total thickness of the section “said slab - internal space - said slab” is at least 300 mm.