Compositions – Fire retarding – Intumescent
Patent
1980-10-27
1982-05-04
Lilling, Herbert J.
Compositions
Fire retarding
Intumescent
252606, 524502, 524505, C08K 534, C08K 551, C08K 304, C08K 532
Patent
active
043281397
ABSTRACT:
Certain filled propylene polymer compositions, especially propylene homopolymers filled with a carbon black (10-50 parts per 100 parts of polymer) and containing about 30-50 parts of intumescent fire-retardant obtained by heating a mixture of a polyol, a phosphorus acid, and melamine have very high ignition resistance and desirable physical properties. When usual inorganic fillers are used, instead of carbon black, good ignition resistance is not obtained. Carbonaceous materials other than carbon blacks, for example, acetylene blacks, graphite, and so-called Austin black reduce or completely counteract the fire-retardant activity of the intumescent fire retardant. Filled propylene polymer compositions of this invention are particularly suitable in applications where the fire hazard is particularly great, for example, in automotive parts under the hood and in electrical applications.
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Chem. Abst., vol. 86 (122400b), "Thermoplastic Resin Compositions",Murata et al., Jan. 28, 1977.
Chem. Abst., vol. 87 (103053), "Thermoplastic Resin Compositions with Improved Flame Resistance", May 25, 1977, Murata et al.
E. I. Du Pont de Nemours and Company
Lilling Herbert J.
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