Paint, intumescent

Intumescent types of nonaqueous coatings have been produced containing an amine aldehyde resin, ammonium salt of polyhydric acid, and pigments, with an appropriate binder. This type of coating possesses excellent fire and flame resistance and good paint properties. There are probably other types of intumescent paints, but their exact composition is not available. 

For unperforated board, intumescent paints still produce optimum fire and flame resistance. However, because the painted surface is continuous, the simpler less flame resistant borax-boric acid pigmented paint produces satisfactory results. 

A successful factory-applied intumescent paint has been developed by the Celotex Corp. for application to acoustic board. In addition, a satisfactory package paint, Due-Tex flame-retardant paint, is available for application over old fiberboard installations, wood, etc. This product bears an Underwriters Laboratories label. 

Ammonium polyphosphates, on the other hand, are relatively water insoluble, nonmelting solids with very high phosphorus contents (up to about 30%). There are several crystalline forms and the commercial products differ in molecular weights, particle sizes, solubilities, and so on. They are also widely used as components of intumescent paints and mastics where they function as the acid catalyst (i.e., by producing phosphoric acid upon decomposition). They are used in paints with pentaerythritol (or with a derivative of pentaerythritol) as the carbonific component and melamine as the spumific compound.22 In addition, the intumescent formulations typically contain resinous binders, pigments, and other fillers. These systems are highly efficient in flame-retarding hydroxy-lated polymers. 

Ammonium polyphosphate Antiblaze MC Albemarle (the United States) Used in the formulation of intumescent paints, coatings, sealants, and mastics... 

Technical grade used in manufacture of fire extinguisher powders, horticultural fertilizers, flame proofing of wood, paper, textiles, and intumescent paints, and in vitreous frits. 

Intumescent paints or sealants offer the finest fine of fire retardant and fire barrier products in the market today. 

Applications Their main application is as ammonium phosphates in fertilizers. In addition, they are used in fire protection e.g. as an additive in fire-extinguishing agents for fighting forest fires, as flame retardants in paper, textiles and poly(urethanes), in the prevention of afterglow in matches and as a component of intumescent paints (flame retarding coatings). They are also used in small quantities in animal nutrition, particularly for cattle. 

Use Phosphorus-based catalyst in organic and latex-based fire-retardant intumescent paints, mastics, and polymers. 

Use Fire-retardant intumescent paints, mastics, and polymers. 

The sueeess of graphite in this applications shows that filler with plate like struetures should be considered when intumescent materials are being formulated. Reeent developments in intumescent paints show that performanee ean be improved if a layer of organic material is inserted between the layers of the plate like filler. The degradation of this material in the enclosed space increases the expansion rate and the retention of gas inside the degrading material. Based on this prinei-ple any plate like filler has the potential to be useful in an intumescent applieation. The eomposition of filler is also important. When clay was used as a filler in fire retardant applieations, it was found that some of its components interfere with the action of carbonization catalysts and detract from the overall performance of the system in terms of limiting oxygen index. ... 

Hercules PE. [Hercules] Pentaeryth-ritols used in prod, of all d resins, rosin esters, oil-modified urethane resins, drying oils, synthetic lubricants, plasticizers, intumescent paints, plastics, stabQizas for plastics, explosives. 

Uses Flame retardant for polymers, intumescent paints/coatings, plastics (polyesters, polymethyl methacrylate, polyolefins, PS, PU foams), textiles, paper intumescent paint/mastic ingred. catalyst in intumescent systems... 

Uses Flame retardant for plastics, polyolefins, polyester, rubbers, pigmented coatings, latex intumescent coating formulations, paper, textiles catalyst in intumescent systems intumescent paint/mastic ingred. ManuWistrib. Akzo Nobel DSM Chem. N. Am. Great Lakes Miljac ... 

Dimelamine phosphate CAS 56974-60-8 Empihcal C6H15N12O4P Properties Wh. powd. sol. 2 g/l in water m.w. 350.24 dens. 1.66 kg/l dec. 300 C Uses Flame retardant for polymers, intumescent paints/coatings, plastics (polyesters, polymethyl methacrylate, polyolefins, PS, PU foams), textiles, paper intumescent paint/mastic ingred. catalyst in intumescent systems Manuf/Distrib. DSM Chem. N. Am. http //www. dsmna. com Trade Name Synonyms Amgard ND t[Rhodia/Phosphorus Perf. Derivs. 

Uses Forms synthetic resins with formaldehyde melamine resins organic synthesis fire-retardant intumescent paint ingred. mfg. of food-contact paper/paperboard leather tanning infood-pkg. adhesives... 

FR-CROS Anzon -p-o- -P-ONH4 intumescent paints, rigid polyurethane foams, PP... 

The three main types of flame-retardant paints are intumescent paints, antimony oxide/chlorinated resin compounds, and silicate paints. ... 

An early fire-retardant treatment for paper and cotton was to heat them with phosphoric acid and urea at 145-180°C to form insoluble ammonium polyphosphate, (NH4P03) . Ammonium polyphosphate is also used in intumescent paint formulations, where, like the orthophosphate, it releases ammonia and phosphoric acid on heating. The latter facilitates charring which, together with the release of ammonia, retards local combustion. A similar mechanism is believed to account, at least in part, for the fire-retardant action of many other phosphorus compounds. There is now evidence that impregnation of wood with phosphoric acid suppresses the formation of carcinogenic materials during pyrolysis [39]. 

Flame-retardant properties are exhibited by (tris methyl salicyl) phosphate (12.210a) and cross-linkable derivatives such as (12.210b). Compound (12.210c) is used with polycarbonates, and melamine phosphate (12.210d) is utilised in intumescent paint formulations [42]. Intumescent flame retardants also include [(NH iPOj] and compound (20.210e) [43],... 

Notes White free-flowing powders, easily dispersed in polymers mainly used in intumescent paints also in sealants, PU foams, epoxy resins, non-halogenated FR PP ... 

Nitrogen compounds are a small but rapidly growing group of flame retardants which are in the focus of public interest concerning environmentally friendly flame retardants. Today, their main applications are melamine for polyurethane flexible foams, melamine cyanurate in nylons, melamine phosphates in polyolefins, melamine and melamine phosphates or dicyandiamide in intumescent paints, guanidine phosphates for textiles and guanidine sulfamate for wallpapers. 

Another mechanism of flame retardance is the intumescent coating which forms an expanded carbon layer at the burning surface and so reduces heat transfer to the coated material. The additives include mixtures of paraformaldehyde, melamine, ammonium phosphate, and chlorinated hydrocarbons. Most intumescent paints are water sensitive and thus have limited applications. 

Dammschichtbildner (Flammschutz) intumescent paint Dammstoff insulating material Dammung tech insulation Dampf vapor... 

Intumescence A mechanism whereby fire-retardant paints protect the substrates to which they are applied. An intumescent paint puffs up when exposed to high temperatures, forming an insulating, protective layer over the substrate. 

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