Production and use of fire retardant dispersions as additives fo

Details Production and use of fire retardant dispersions as additives fo Production and use of fire retardant dispersions as additives fo

1995-08-24

1997-11-11

Anthony, Joseph D.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524404, 524409, 524464, 524469, 252609, 428921, C08K 549, C09K 2108, C09K 2112, C08L 3500

Patent

active

056865147

ABSTRACT:
A fire retardant system useful in a thermosetting resin system comprises a dispersion of particles of a halogen-containing organic material and an inorganic synergist in a liquid phosphorus carrier. The particles in the blend are reduced to 20 microns or less by suitable means, for example, by processing through a 3-roll mill. The composition is incorporated into the resin in an amount of between 3% and 15% by weight of resin where the dispersion remains in suspension during curing of the resin. The thermosetting resin is a saturated or an unsaturated resin such as a polyester, a polyepoxide or a polyurethane. The resin when formed into a ceiling panel has a flame-spread index less than 25 and a smoke rating of 450 or less when tested according to ASTM Test E-84.

REFERENCES:
patent: 3772455 (1973-11-01), Nicodemus et al.
patent: 3936414 (1976-02-01), Wright et al.
patent: 4417021 (1983-11-01), Nakamura
patent: 4619954 (1986-10-01), Warner, II
patent: 4764539 (1988-08-01), Ladang
patent: 4857576 (1989-08-01), Kochi et al.
patent: 5252682 (1993-10-01), Bayha
patent: 5318853 (1994-06-01), Bayha et al.
Designation: E 84 -94 Standard Test Method for Surface Burning Characteristics of Building Materials (Jun. 21, 1995).

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