Fire Retardant Paints

Fire Retardent Paints. Fire retardant paints are based on chlorinated rubber and chlorinated plasticizers with added SbO. These reduce the rate of spread of flames. Addn of NH4H2PO4, PE, or dicyandiamide produces an intumescent or swelling paint that forms a thick insulating layer over the surface to which it is applied when exposed to flames Fire retardant paints do not control fires and are no substitute for an automatic sprinkler system. They are best used where the only hazard is exposed, combustible, interior finish materials or in isolated buildings where sprinklers will not be installed. The paint must be applied at the rate specified on the container if spread thinner the proper... 

Barium metaborate is used as an additive to impart fire-retardant and mil dew-resistant properties to latex paints, plastics, textiles, and paper products (6). Barium metaborate is marketed by Buckman Labs, Inc., Memphis, Tennessee (12). 

In the United States approximately 50% of the 40,000 t of chloriaated paraffins consumed domestically are used in metal-working lubricants. Approximately 20% are consumed as plastic additives, mainly fire retardants, and similarly 12% in mbber. The remainder as plasticizers in paint (9%) and caulks, adhesives, and sealants at 6%. 

Uses. Constituent of alloys with other metals (tin, lead, copper) sulfides used in compounding of rubber and manufacture of pyrotechnics trioxide used as a fire retardant in plastics, rubbers, textiles, and paints chlorides used as coloring agents and as catalysts fluorides used in organic synthesis and pottery manufacmre... 

Borates are widely used in fire retardant applications. For example, cellulose insulation products used in homes and cotton batting used in mattresses and other furnishings are typically treated with boric acid to inhibit smoldering combustion. Borates are also used as fire retardants or fire retardant synergists in plastics, rubber products, and paints, where specialized borates such as zinc borate may be used. 

Flameproof (or Fireproof) Compounds are substances used to impregnate various flammable materials to make them fire-resistant or capable of burning without flame. Numerous compns are given in Refs 1 2. (See also Fire-Resistant Textiles and Fire-Retardant Paints) Refs 1) H. Bennet, "The Chemical Formulary , Vol 1-7, Van Nostrand, NY(1933—... 

Flamoproofing Substances. See Flameproof Compounds, Fire Resistant Textiles, and Fire Retardant Paints... 

Some of tlie salts of bismuth are used in medicines for the relief of digestive disorders because of the smooth, protective coating the compounds impart to imtated mucous membranes. Like barium, bismuth also is used as an aid in x-ray diagnostic procedures because of its opacity to x-rays. At one time, certain bismuth compounds were used in the treatment of syphilis. Bismuth oxychloride, which is pcarlcsccnt, has found use in cosmetics, imparting a frosty appearance to nail polish, eye shadow, and lipstick, but may be subject to increasing controls. Bismuth phosphomolybdate has been used as a catalyst in the production of acrylonitrile for use in synthetic fibers and paints. Bismuth oxide and subcarbonate are used as fire retardants for plastics. 

FIRE-RETARDANT PAINTS. See Paint and Finish Removers... 

ZnO is of considerable commercial importance and applications relevant to this chapter include a variety of uses in the rubber industry as a curing accelerator, adhesive and stabilizer. It is also important in the manufacture of other zinc compounds and is increasingly being used in photocopying.121 For its applications as a pigment see Chapter 58. ZnS is an important phosphor. Zinc borate is used in fireproofing fabrics and in fire-retarding paints.121... 

Ordinary paints, particularly those with pigmentation intermediate between flat and full gloss, possess a fair amount of fire retardance when exposed to conditions existing during the first stages of a fire. This can be checked at a bonfire by throwing on painted and unpainted boards, and observing which catches fire first and which is consumed first. 

The really worth-while features of improved types of actual paints that possess considerable fire retardancy have not yet received enough attention. Special pigments that fuse, release smothering gases, or react with the combustible substrate--combined with special puffing vehicles to provide insulation -- can be used to make coatings... 

If these two features were better known -- that ordinary paints as applied to ordinary construction do not constitute an additional hazard and that special paints can be used to provide an extra measure of protection at critical points by retarding the initial rate of spread of fire -- the proper climate of public opinion would prevail that would ensure the further development and use of true fire-retardant paints. 

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