Method for applying polymeric diphenylmethane diisocyanate to cellulose/gypsum based substrate
US6217946A · kind A · utility
6Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jul 23, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C1/0813
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The disclosed invention consists of a means for conveying a gypsum or gypsum/cellulose fiber board to a rotary cylinder brush station where pMDI resin is delivered onto the rotary cylinder brush just as the board passes under the brush. A resin distribution system is used to coat the rotary cylinder brush applicator with pMDI. Optionally, a second rotary cylinder brush station is included, if desired, to smooth out and spread the pMDI resin over the surface of the gypsum board substrate to achieve complete coverage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.