Halogen-free fire retardant system for low heat release polymers
US7378463B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2004 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Sep 7, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K21/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An intumescent fire retardant system for making polymeric moldings that is halogen-free and provides fire shielding, thermal shielding and a low heat release rate. The intumescent fire retardant system of the present invention comprises, on the basis of 100 parts by weight blended mixture, 20-45 parts of a polymeric binder based on high density polyethylene and an α-olefin-containing copolymer, such as linear low density polyethylene, and 5-25 parts of a nitrogenous gas-generating agent, 10-30 parts of a water vapor-generating agent, 1-5 parts of an antioxidant, and 0-15 parts of a reinforcing agent. The fire retardant system of the present invention is essentially halogen-free.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.