Red phosphorus flame retardant and nonflammable resinous composi

Details Red phosphorus flame retardant and nonflammable resinous composi Red phosphorus flame retardant and nonflammable resinous composi

1994-08-09

1996-08-06

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

428407, 523200, 523204, 524414, 524 80, 423322, C08K 332, C08K 320, B32B 904

Patent

active

055434444

ABSTRACT:
Disclosed is a red phosphorus flame retardant comprising a fine red phosphorus powder subjected to a surface modification treatment, said fine red phosphorus powder consisting of spherical red phosphorus particles and/or agglomerates thereof directly obtained by the thermal conversion of white phosphorus in the presence of a dispersant and has an average particle size of 10 .mu.m or smaller and of which at least 80% by weight is accounted for by particles having particle sizes of 20 .mu.m or smaller, said flame retardant having an average particle size of 15 .mu.m or smaller, with the particles having particle sizes of 35 .mu.m or smaller accounting for at least 80% by weight of the flame retardant; and a nonflammable resinous composition composed of a synthetic resin and the red phosphorus flame retardant.

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Miller, "Performance Moves Up on R&D's Hit List", Plastic World, Mar. 1992, pp. 42-48.
Encylopedia of Chemical Terminology, vol. 15, p. 286 (1968).

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