CS230711B1 - Dispersed coating composition and cement with antifire effect - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a dispersion paint and sealant having a fire-fighting effect and solves the problem of their composition, in which they effectively protect against the effect of fire and do not produce violently toxic fumes.

It is known to protect parts of buildings and equipment that may be endangered by the effects of fire with protective coatings. The paints and sealants which effectively insulate the substrate from the hot environment show a considerable fire-fighting effect. A distinctive type are coatings which foam under the influence of fire and thus increase the thermal insulation effect.

One such composition is a mixture of 0.002 to 44% flame retardant, 0.004 to 53% carbonaceous remover, and 0.07 to 65% phosphate based carbonation catalyst, as described in U.S. Pat. author certificate 215 275.

The fire protection effect is further enhanced if a flame retardant is present in the mixture. Already U.S. Pat. No. 2,590,211 discloses the action of oxides and sulfide of arsenic, antimony and bismuth as flame retardants. SU patent 652 898 recommends the use of bismuth chloride or bromide or crude for the same purpose. Flame retardants based on arsenic, antimony or bismuth compounds have a high effect.

Their common disadvantage is that they react with hydrogen in the state of birth that can form in the smoldering mass to form extremely toxic hydrides such as arsine, stibine.

The effect of other flame retardants, e.g., zinc, stannous, cupric salts of higher fatty acids, as described in U.S. Pat. No. 3,951,822, zinc and iron oxalate and U.S. Pat. No. 4,079,033, is considerably less. Also, the effect of the dispersed tinic acid is less than that of the antimony compounds.

The above-mentioned drawbacks have no dispersion paint and fire-resistant mastic, which consists in that it contains 5 to 50% by weight of a dispersion of polymers or copolymers of alpha, beta-ethylenically unsaturated monomer or bituminous material, 4 to 50% by weight aliphatic and alicyclic polyols of at least trivalent, carbohydrates, polysaccharides and their derivatives, proteins and aminoaldehyde condensates, halogenated hydrocarbons and their oxygen derivatives, 4 to 50% by weight of substances providing non-flammable gases from the group of carbonic amides and derivatives derived therefrom, cyanamide and derivatives, azoamides of carboxylic acids and crystalline water compounds, 3 to 40% by weight of a carbonation catalyst comprising boric and / or phosphoric acid free or chemically bound and 0.03 to 5% by weight of an oxygenated molybdenum compound.

Preferably, the dispersion paint and sealant may further comprise up to 12% by weight of the antimony compound and / or bismuth.

The advantage of the coating composition and mastic according to the invention is that it effectively protects the articles provided by them from the effects of fire, i.e., by the action of fire, it creates a voluminous foamed material with considerable thermal insulation ability and which only slowly and incompletely burns.

A further advantage that antimony or bismuth flame retardants may be present in the paint and sealant composition without producing stibine or hydrogen bismuth can further increase the fire-fighting effect of the paint and sealant according to the invention.

The compositions of the paints and sealants according to the invention can be more fully understood from the following non-limiting examples. In the examples, parts are by weight.

Example 1

50 parts of chlorparaffin, 60 parts of dicyandiamide, 62 parts of titanium dioxide, 82 parts of limestone, 20 parts of kaolin, 43 parts of calcium zinc molybdate were dispersed in 260 parts of a 60% polyvinyl acetate dispersion softened with 20% tris-beta-chloroethyl phosphate. After adding 32 parts of the additive mixture and 136 parts of water, 65 parts of penta-erythritite, 54 parts of hydrophosphate and 96 parts of ammonium dihydrate and finally 40 parts of short-ground glass fibers were dispersed in the mixture. The prepared coating composition was applied in a thickness of 280 µm on a fibreboard. The paint was burned by gas burner foam in 2 to 3.5 seconds to an average height of about 40 mm.

Example 2

12 parts of hydrolyzed starch, 30 parts of chlorinated polyethylene, 325 parts of urea glycerophosphate concentrate and 30 parts of finely divided silicic acid were dispersed in 243 parts of styrene-butadiene latex. After adding 12 parts of additives and 67 parts of water, 62 parts of melamine, 10 parts of crystalline borax, 5 parts of boric acid, 4 parts of ethylene diamine dimolybdate and 140 parts of antimony trioxide on a carrier were homogenized. The prepared paint adhered well to both absorbent and non-absorbent substrates and with one coat it was possible to achieve a layer thickness of 100 to 150 µm, which did not crack when dried. The sheet applied by the tanning process foamed for 5 to 8 seconds to a considerable extent, the generation of smoke during burning was unusually small.

Example 1 8 4. 3 parts of the homdpolymer acrylate dispersion unplasticized were homogenized with 8 parts of chlorinated diphenyls as a solution in tricresyl phosphate, 11 parts of formulations and 65 parts of water. The treated dispersion was gradually metered into a kneader where it was mixed with 30 parts of dextrin, 58 parts of hydrolysed sucrose, 60 parts of chlorinated polypropylene, 40 parts of ammonium carbaminate, 140 parts of urea, 55 parts of ammonium ureapolyphosphate solution in slightly alkaline ammonia water, 42 parts of gypsum. 20 parts of slate, 0.5 parts of ammonium molybdate, 5.5 parts of antimony trioxide, and finally pulverized 40 parts of asbestos. Then 358 parts of expanded perlite were carefully mixed into the mixture. The prepared putty sealed a hole in a 100 mm thick gas-silicate plate. The sealed hole was burnt by a gas burner, the sealant did not burn and gradually burned out. The reverse side temperature of the sealant would be less than # the reverse side temperature of the gas silicate plate. The fire did not penetrate through the sealed hole until the gas silicate plate began to disintegrate. The presence of stibine was not demonstrated by the Donaue luminescence test in the burnt sealant smoke.

Example 4

305 parts of ethylene-vinyl acetate copolymer dispersion were treated and supplemented with 12 parts of additives and 52 parts of water, then dispersed in 35 parts of dipentaerythritol, 30 parts of starch, 20 parts of pentabromotoluene, 10 parts of methylcellulose, 72 parts of dicyandiamide, 240 parts of ammonium polyphosphate. parts of lithopone, 85 parts of hydrated alumina, parts of burnt kaolin, 7 parts of ammonium molybdate and 35 parts of bismuth oxide. The paint from such prepared paint by foaming massively foamed and thermally insulated well and burned very slowly due to the direct effect of the flame.

Example 5

392 parts of asphalt dispersion, alkalized with a small amount of sodium hydroxide, were dispersed with 55 parts of pentaerythritol, 52 parts of chlorpsrafin, 20 parts of carboxymethylcellulose, 171 parts of urea glycerophosphate concentrate, 20 parts of diatomaceous earth, 30 parts of kaolin, 160 parts of talc, 20 parts of ground mica, 10 parts of molybdic acid and 30 parts of antimony trioxide. The prepared paint due to a slight thixotropy was applied well on inclined surfaces. The strip of asphalt board, half coated with the mass, did not burn in the protected area due to fire, did not smoke much and did not burn until the unprotected burning part was twisted.

The paints and sealants according to the invention are intended to effectively protect objects against the effects of fire.

Claims (3)

SUBJECT OF THE INVENTION A dispersion paint and a fire-resistant mastic based on dispersive binders, heat-carbonizing substances, heat-generating substances, flame-retardant gases, carbonization catalyst, dispersant and additives or fillers, pigments and flame retardants based on antimony and bismuth compounds, They contain from 5 to 50% by weight of a dispersion of a polymer or copolymer of alpha .beta.-ethylenically unsaturated monomer or bitumen, 4 to 50% by weight of heat-carbonating substances of at least trihydric aliphatic and alicyclic polyols, carbohydrates, polysaccharides and their derivatives, proteins and aminoaldehyde condensates. , halogenated hydrocarbons and their oxygen derivatives, * up to 50% by weight of non-flammable gases, from the group of carbonic amides and derivatives derived therefrom, cyanamide, its oligomers and derivatives, and carboxylic acid azoamides eline and crystalline water compounds, 3 to 40% by weight of a carbonization catalyst comprising boric acid and / or phosphoric acid free or chemically bound and 0.03 to 5% by weight of an oxygenated molybdenum compound, and eats up to 12% by weight of an antimony and / or bismuth compound . 2. The dispersion paint and sealant of claim 1, wherein the molybdenum nin is ammonium molybdate phosphate. 3. Dispersion paint and sealant according to claim 1, characterized in that the molybdenum is a salt of molybdenic acid with a nitrogen base. eventually longer content, that the oxygen compound will serve the oxygen compoundSeverografia, n. p., MOST