Methods of incorporating phosphate/borate fire retardant formulations into wood based composite products
US6811731B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Sep 22, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27N9/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A fire-retardant wood-based composite is formed by treating a green wood furnish with an amount of a phosphate/borate fire retardant treatment effective to increase the fire retardancy of the resulting wood-based composite, compared to the fire retardancy of the corresponding wood-based composite lacking the fire retardant. The fire retardant treated green wood furnish is blended with a binder and then bound, as by pressing the furnish, to form a non-leaching fire-retardant wood based composite. Another aspect of the invention is the product formed according to the preceding process. The fire retardant may also act as a catalyst to cure the binder and thus promote binding. Also, the addition of the fire retardant to green wood chips, without the need to dry them to a low moisture content, is believed to be novel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.