Abstract
An exterior grade adhesive dispersion, based on ammonium spent sulfite liquor (NH//4SSL), an alkaline phenol-formaldehyde (PF) resin, and an acid catalyst was prepared and evaluated for the production of waterboard. Some of the factors affecting its curing properties included the source of NH//4SSL, the lignin to carbohydrate ratio, the molecular weight distribution of PF, and the pH. This resin appears to have considerable potential as a low-cost exterior grade adhesive for waferboard/OSB since NH//4SSL is available at a fraction of the cost of PF. Results indicate that a NH//4SSL-PF resin that contains up to 50 percent solids had curing and adhesive properties similar to commercial PF resins currently used as face resins in the industrial manufacture of 3-layer waferboards.
Original language | English (US) |
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Pages (from-to) | 15-20 |
Number of pages | 6 |
Journal | Forest Products Journal |
Volume | 38 |
Issue number | 5 |
State | Published - May 1988 |
Externally published | Yes |
ASJC Scopus subject areas
- Forestry
- General Materials Science
- Plant Science