Fireproof composition for cable "kl-1". RU patent 2516127.

IPC classes for russian patent Fireproof composition for cable "kl-1". RU patent 2516127. (RU 2516127):

C09K21/14 - Macromolecular materials

A62D1/00 - Fire-extinguishing compositions; Use of chemical substances in extinguishing fires

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FIELD: chemistry.

SUBSTANCE: invention relates to construction materials, namely to field of fireproof materials, and is intended for application of fireproof coating on single cable, bundle of cables or cable lines in construction of different buildings and constructions for ensuring nonproliferation of flame on cable surface. Fireproof composition includes, in wt %: melamine - 10.5-25, ammonium polyphosphate - 10-30, titanium dioxide - 0.5-7, pentaerythritol - 10-17, dispersion of vinylacetethylene - 10-50, plasticiser - 0.5-5, ethylene glycol - 0.5-5 to reduce minimal temperature of film formation, paraffin-based foam extinguisher - 0.1-1, hydroxyethylcellulose - 0.1-0.8, as structure-forming agent and reological additive and water - the remaining part. Coating based on obtained fireproof composition does not require reduction of current loading, does not crack and does not impair adhesion to surface in the process of exploitation.

EFFECT: invention can be used in residential and industrial buildings.

The invention relates to the building materials, namely to the field of fireproof materials and is intended for application of fire retardant coating on a single cable, the cable bundle or cable line in the construction of various buildings and structures to ensure the proliferation of flame over the surface of the cable.

The technical result is the increase of fireproof efficiency, reduced smoke-forming ability and toxicity of combustion products.

The invention can be used in residential and industrial buildings, mechanical engineering, power industry, and nuclear power plants.

The famous fire retardant composition for cables (RF patent №2272057 C1) including acrylic dispersion as a binder, magnesium oxide, borates, oxide, antimony, salt, phosphoric acid and preservatives and additives. The disadvantage of this song use as flame retardant toxic oxides of antimony (III).

The closest analogue is fire-retardant paint (US patent №6251961) including, mass:

polyphosphate and/or ammonium phosphate

4-10

acrylic dispersion

5-30

pentaerythritol

5-25

titanium dioxide

5-25

melamine

5-50

plasticizer and water to

100

The disadvantages of this fire retardant compositions for cable is the requirement to reduce the current loads, the use of acrylic copolymer, prone to brittleness and cracking at low temperatures as a binder as well as the high toxicity of combustion products according to GOST 12.1.044-89.

The present invention is to increase the effectiveness of fire protection coatings by improving adhesion, reduce the temperature of film formation of material, reduce the toxicity of combustion products and the possibility of using fire-resistant coating without reducing current loads.

Task decides that the fire retardant composition by cable including melamine, ammonium polyphosphate, titanium dioxide and pentaerythritol, contains instead of acrylic copolymer contains vinylacetate copolymer, and functional additives - glycol to reduce the minimum temperature of film formation, plasticizer, antifoam on the basis of paraffin, hydroxyethyl cellulose as a structure-forming agent and rheological additives and water in the following ratio of components, mass%:

Ammonium polyphosphate long-chain

10-30

Melamine

10,5-25

Pentaerythritol

10-17

Titanium dioxide

6,5-7

The copolymer dispersion vinylacetylene

10-50

Plasticizer

0,5-5

Defoamer

0,1-1

Hydroxyethylcellulose

0,1-0,8

Ethylene glycol

0,5-5 Water else

Under the concept of a copolymer dispersion vinylacetylene means a product that is a dispersion on the basis of a copolymer of ethylene and vinyl acetate in these quantities. As an example plasticizer is tricresylphosphate and other phosphate plasticizer, usually used for such trains.

Fire retardant composition cable is prepared as follows: components consistently loaded in the mixing capacity and stirred for 100-120 minutes.

The structure features of vinylacetate copolymer due to the possibility of the use of fire retardant coating without reducing the current loads, in addition an important role in achieving the radiation resistance also plays vinylacetate copolymer.

Method of application to the surface of the cable - airless spraying or manually.

On the prepared surface of the cable, the paint is applied in a thin layer (0.5-0.8 mm) depending on the insulation of the cable.

Assessment of the effectiveness of fire protection coating was carried out according to GOST R.

The service life of coatings based on the paints without direct hit condensed moisture at least 15 years.

Transportation and storage of paint is carried out at temperatures from + 5 C to + 40 C.

Fire retardant composition for coating on a surface of the cable, including melamine, ammonium polyphosphate, titanium dioxide and pentaerythritol, contains copolymer dispersion vinylacetylene, and ethylene glycol to reduce the minimum temperature of film formation, plasticizer, antifoam on the basis of paraffin, hydroxyethyl cellulose as a structure-forming agent and rheological additives and water, following ratio of components, mass%: