Fire-retardant, intumescent composition and its use for the flameproofing of substrates, and as a fire-extinguishing agent comprising an ammonium salt, a water-soluble nitrogen compound as a blowing agent and dextrin
US4382884A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Apr 6, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D5/185
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An intumescent, fire-retardant, aqueous composition which comprises (a) as a flameproofing agent, a water-soluble ammonium salt of a non-volatile inorganic acid, such as sulfamic acid, sulfuric acid or, in particular, phosphoric acid, (b) as a blowing agent, a water-soluble nitrogen compound, for example urea, which can be methylolated, or its derivatives and salts and (c) dextrin as a binder, (d) if desired, formaldehyde, and (e) if desired, further additives, for example wood preservatives, is used for the flameproof and heat-resistant treatment of very diverse substrates, preferably building timber, or for extinguishing burning substrates of all kinds. When the composition is used as a fire-extinguishing agent, it preferably additionally contains a foaming agent, and can contain a foam stabilizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.