Method for making a cellulosic material fire-resistant

Details Method for making a cellulosic material fire-resistant Method for making a cellulosic material fire-resistant

1979-06-04

1980-10-14

Lusignan, Michael R.

Coating processes

Particles, flakes, or granules coated or encapsulated

106 1814, 106 1816, 106 1817, 252 81, 427325, 427397, 428403, 428921, 264109, B05D 700, B05D 302, C09D 516, C09D 518

Patent

active

042282020

ABSTRACT:
This specification describes a method for making a cellulosic material fire-resistant. The material is well dried and then impregnated with an aqueous solution containing phosphoric acid and ammonium sulphate and/or ammonium phosphate. The solution may also contain borax, trisodiumphosphate, ammonia, sodium carbonate, and sodium chloride. The method is particularly suited for treating sawdust in the manufacturing of chipboards. After impregnating the dry sawdust with the solution under stirring the material is dried once more and glue is applied whereupon chipboards are formed from the composite material.

REFERENCES:
patent: 655845 (1900-08-01), Winter
patent: 1571048 (1926-01-01), Garrow
patent: 2817617 (1957-12-01), Rogers
patent: 3088836 (1963-05-01), Garti et al.
patent: 3840388 (1974-10-01), Perlus et al.
patent: 3974307 (1976-08-01), Bowen

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