Flame retardant resinous compositions and process

Details Flame retardant resinous compositions and process Flame retardant resinous compositions and process

2011-03-29

2011-03-29

Choi, Ling-Siu (Department: 1762)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S009000

Reexamination Certificate

active

07915328

ABSTRACT:
Disclosed is a resinous, flame-retardant composition comprising (i) 40-66 wt. % alkenyl aromatic resin, (ii) 9-33 wt. % ammonium polyphosphate, (iii) 14-40 wt. % cellulosic material and (iv) an amount of between 0.1 parts per 100 parts resinous components (phr) and 10 phr of at least one metal stearate, wherein all weights are based on the total weight of the composition and wherein ammonium polyphosphate and cellulosic material are present in a weight % ratio effective to provide molded articles exhibiting at least V-1 flame rating as determined according to the UL-94 protocol. Processes to prepare the composition and articles comprising a composition of the invention are also disclosed.

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