Methods for reducing the flammability of cellulosic substrates
US6491727B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jun 9, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2200/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Compositions and methods of rendering cellulosic materials flame resistant, and articles of manufacture including the materials, are disclosed. The compositions include one or more crosslinking agents, and, optionally, one or more phosphorus-based compounds. Dimethyloldihydroxyethylene urea, imidazole, imidazolidinones, dialdehydes, and dichlorotriazines are preferred crosslinking agents. The methods involve applying the composition to the material, and covalently linking the crosslinking agent to the material. An advantage of covalently linking the crosslinking agent to the cellulosic material is the lack of any potential toxicity associated with uncrosslinked fire retardants on the cellulosic material and the stability of the bonds between the material and the crosslinking agent to conventional steam cleaning and other carpet cleaning methods. In a preferred embodiment, the fire-retardant cotton-fiber composition is used to prepare cotton carpets, upholstery or raised surface apparel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.