Flame resistant cellulose fiber insulation and process of preparing it

Patent · Tue Nov 06 00:00:00 EST 1979

OSTI ID:5421145

Quinto, M J

This invention produces flame resistant cellulose fiber insulation, which will be referred to as CFI. The best flameproofing agents which have been used in the past are mixtures of boric acid and borax as the major portion of the mix and have been applied both as dry powders and sprayed from water dispersions. Boric acid is quite expensive as it is prepared from borax by the addition of acid and purification of the boric acid. In the present invention lower cost materials and process are obtained by applying a mixture of boric acid and borax which has been prepared by adding acid, such as sulfuric acid, a mixture of sulfuric and phosphoric acid, and the like, to borax to transform a portion of the borax into boric acid. The reaction products, sodium sulfate, or a mixture of sodium sulfate and sodium phosphate in the case both acids are used, remain in the material applied to CFI. While they are not by themselves highly effective flameproofing agents, particularly sodium sulfate is not, they do add somewhat to flame resistance. In other words, wht elimination of the step of separating and/or purifying boric acid is eliminated without, however, eliminating its function. The product produced is as good a flame retarder when applied to CFI; in fact it is slightly better. Additionally there are great savings in cost.

• Assignee: TIC; EDB-80-066418
• Patent Number(s): US 4173666
• OSTI ID: 5421145
• Resource Relation: Patent File Date: Filed date 11 Sep 1978
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
THERMAL INSULATION
FIRE RESISTANCE
MANUFACTURING
BORIC ACID
CELLULOSE
ECONOMY
SEPARATION PROCESSES
CARBOHYDRATES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
320100* - Energy Conservation
Consumption
& Utilization- Buildings