Process and composition for producing flame retardant rebonded f

Details Process and composition for producing flame retardant rebonded f Process and composition for producing flame retardant rebonded f

1992-05-11

1992-12-29

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 57, 521 85, 521 88, 521 89, 521 92, 521906, C08J 924

Patent

active

051751941

ABSTRACT:
A flame retardant composition and process which is particularly useful for rebonded foam products. The composition of the present invention includes a solid component of magnesium sulfate, boric acid, decabromodiphenylethylene oxide (DECA) and antimony trioxide and a liquid component of halogenated phosphorous. The present invention is based upon the discovery of the synergism between boric acid and DECA. The process, according to the present invention, includes the steps of forming a dispersion of the solid portion of the flame retardant composition along with a small amount of water based adhesive to a mass of foam chips. The treated chips are then dried to permit handling and storage. The dried foam chips subsequently are mixed with a conventional urethane prepolymer binder and the liquid halogenated phosphorous flame retardant compound. After mixing the foam mass is transferred to molds and steamed to allow the binder to cure. Rebonded foam manufactured by this process displays excellent physical properties while, at the same time, exhibits a Flame Spread Index I.sub.s value of less than about 25.

REFERENCES:
patent: 4331726 (1982-05-01), Cleary
patent: 4438220 (1984-03-01), Fracolossi et al.
patent: 4438221 (1991-01-01), Fracolossi et al.
patent: 4988739 (1991-02-01), Hill
patent: 4992481 (1991-02-01), von Bonier et al.

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