Coating fire-resistant

Kobayashi, N., Yoshida, K., Sagawa. K., and Ishibara, S. 1995. Intumescent fire resistant coating, fire resistant material, and process. U.S. Patent, 5,401,793. 

Chem. Descrip. Magnesium oxide CAS 1309-48-4 EINECS/ELINCS 215-171-9 Uses Ingred. in oxychloride and oxysulfate cements cementitious matrix for construction applies. for mfg. of commercial, industrial, sparkproof, and decorative terrazzo floors, flooring for railroad boxcars, industrial fireproof coatings, fire-resist, marine interior deckings, variety of building units... 

The aryloxyphosphazene polymers, on the other hand, have been used primarily ia wire and cable coatings and jackets and as fire-resistant, low smoke, closed-ceU foams and sound-barrier sheets. 

They may form an impervious fire-resistant coating preventing access of oxygen to the polymer. 

The thermal and UV resistance will depend on the stabiliser systems used. The hardness of the coating will depend on the amount and type of plasticiser used. Correct selection of the plasticiser can permit the use of the plastisols at high or low temperatures, provide fire resistance or oil resistance. Plastisols can be produced in a range of gloss levels from 80 units down to 10 gloss units. 

These coatings provide the most effective fire-resistant system available but originally were deficient in paint color properties. Since, historically, the intumescence producing chemicals were quite water-soluble, coatings based thereon did not meet the shipping can stability, ease of application, environmental resistance, or aesthetic appeal required of a good protective coating. 

We can finally note the preparation of blends from an elastomeric and an non-elastomeric copolymers II (x=l) [585]. These blends can be used to prepare films, fibres or coatings, and foams that exhibit excellent fire resistance and produce low smoke levels. 

Fire Retardant - In general a term that denotes a substantially lower degree of fire resistance than "fire resistive. It is frequently used to refer to materials or structures that are combustible but have been subjected to treatment or surface coatings to prevent or retard ignition of the spread of fire. 

The second bullet implies that all structural steel requires a 3-hour fire resistive coating. Again, the statement does not define when the specific design feature must be used. These types of statements normally apply to design specifications for projects. 

Passive protection can be used to increase the time to structural failure. For example, intumescent mastic coatings of less than 1 inch thickness have been shown to provide up to 4 hours of fire resistance when applied to steel columns. Cementitious materials have been shown to provide 1-4 hours fire resistance for thicknesses of 2.5-6.3 cm (1-2.5 in). For additional information on passive fire protection, see Chapter 7. 

Mastics are sprayed on a substrate in one or more coats, depending on the desired degree of fire resistance. The final coat of all fireproofing mastics should be rolled or brushed to provide a smooth surface finish. The material should be applied with a sufficient number of coats to prevent running or slumping and sufficient drying time should be allowed between coats. Mastics may also be hand-troweled, if permitted in the manufacturer s specifications. 

Fire Aboard USS Forrestal in 1967, during which the bombs started to explode 90 seconds after the fire began, thus killing the first wave of fire-fighters, brought to prominence the necessity of increasing the "cook-off period in bombs to at least 5 minutes. This task was achieved at the US Naval Ordnance Laboratory, White Oak, Md, 20910 by die method briefly described in Expls Pyrots 3(3)(1970). See also Fire Resistant Coatings for Bombs in this Vol... 

Finally, a new aluminum fire-resistant paneling consists of a composite design that includes a solid thermoplastic compound core covered with a high density polyethylene adhesive film and an aluminum skin. The product is easily formable. It has sound deadening abilities, and an optional poly(vinyhdene fluoride) resin coating provides damage resistance. 

F or centuries man has attempted to devise an effective process by which combustible materials could be rendered noncombustible or at least fire-resistant, but until about 10 years ago progress in this field was very limited and the effectiveness of the processes was questionable. Back in the days of the Roman Empire, efforts were made to reduce the fire hazard in props, curtains, and decorative-effect materials used in stage and theatrical plays by impregnating the fabrics with fine clay, and at about the same time clay, gypsum, and other types of plaster were used to coat wood, in an effort to make it resistant to fire. Since that time there has been steady progress in the field of fire-resistive and fire-retardant treatment processes, but it has been slow and the field of activity has been rather limited. 

---