Abstract
Corn starch is one of the most adaptable and renewable industrial raw materials since it is abundant and easy to be separated. A process for manufacturing water resistant corn starch based and formaldehyde-free wood adhesive included four steps: corn starch was denatured by solid phase oxidation to produce oxidized corn starch. The oxidized corn starch was rapidly liquefied by ethylene glycol under ambient atmosphere at 110-140°C to produce starch based polyol with high reactivation. Then the starch based reactive polyol was crosslinked with equivalent multicarboxylic acid (anhydride) through the ester bond. And pre-polymerized polyester type wood adhesive was diluted by absolute ethanol to prepare the sprayable wood adhesive. The resulting adhesive performed well as a formaldehyde-free wood adhesive. Multi-ply wood composites bonded with this polyester type adhesive had acceptable shear strengths and water resistance.
Original language | English (US) |
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Pages (from-to) | 309-312 |
Number of pages | 4 |
Journal | Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering |
Volume | 24 |
Issue number | 9 |
State | Published - Sep 2008 |
Keywords
- Corn starch
- Polyesters
- Rapid liquefaction
- Shear strength
- Solid phase oxidation
- Wood adhesives