Formaldehyde-free flame retardant treatment for cellulose-containing materials
US6365070B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S57/904
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An aqueous finishing composition for cellulose-containing materials, comprising a hydroxyalkyl-functional organophosphorus flame retardant (which contains a substantially non-volatile component at the curing temperature) and a non-formaldehyde cross-linking agent (such as a polycarboxylic acid cross-linking agent), and the materials treated with such a composition. Optional ingredients for the aqueous finishing composition include a cross-linking catalyst and/or an inexpensive saturated alpha-hydroxy polycarboxylic acid such as citric acid (partial replacement of a more expensive preferred polycarboxylic acid will reduce finishing costs).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.