Flame retardant filled polypropylene compositions containing carbon black and a cured intumescent flame retardant (IFR)
US4328139A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1980 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Oct 27, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K13/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.