Lignin-modified phenolic adhesives for pressed wood products
US4537941A · kind A · utility
17Cited by
13References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1984 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Aug 28, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L97/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved modified phenol-formaldehyde resin, and a process for its preparation, which contains lignosulfonates is described. Typically, the lignosulfonates are in the form of black liquor. These resins are made by including with the phenol a small amount of potassium ferricyanide. Unlike the known processes utilizing black liquors and the like, this process appears to be far less susceptible to the inherent variability of these liquors. These resins can be easily converted into a solid by spray drying, and find use as adhesives, for example in board products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.