Method of flameproofing wood with inorganic ammonium salts and dicyandiamide/formaldehyde reaction products
US4301217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Oct 17, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31957
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for flameproofing wood is claimed, which comprises treating the wood with aqueous preparations which contain PA0 (a) at least one water-soluble ammonium salt of a non-volatile inorganic acid, e.g. ammonium sulfate or ammonium phosphate, PA0 (b) at least one water-soluble cationic reaction product of dicyandiamide, formaldehyde, optionally an ammonium salt and/or an alkylenepolyamine containing at most 18 carbon atoms, or the acid salt thereof. Components (a) and (b) are applied in succession or preferably simultaneously and the wood is subsequently dried. The flameproof finish obtained is resistant to rinsing. The wood provided with the flameproof finish is used in particular as mine timber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.