Phosphonic acid salts, their preparation and their use for fireproofing organic fibre material
US4452849A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Jan 26, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/268
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel phosphonic acid salts produced from ethane- or methanephosphonic acid, dicyandiamide and/or guanidine and optionally ammonia and corresponding to the formula ##STR1## wherein n, p, q, t and y are each 1 or 2, are particularly suitable for fireproofing organic fibre materials. Synthetic and/or cellulose-containing fibre materials are treated with an aqueous solution of the phosphonic acid salts and are then dried preferably at 60.degree. to 200.degree. C. The applied phosphonic acid salts impair only negligibly the textile-mechanical properties of the treated fibre materials, especially of the cellulose-containing fibre materials dried at 120.degree. to 150.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.