›› 2008, Vol. 28 ›› Issue (3): 35-38.
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TANG Yong, ZHANG Xiang, YANG Bing, WANG De-yi
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Abstract: Phosphited polyvinyl alcohol (P-PVA) was synthesized from diethyl phosphite and oxidated polyvinyl alcohol (O-PVA) which was obtained by oxidation of polyvinyl alcohol with KMnO4. The structure of P-PVA was confirmed by FT-IR and 1H NMR. Using P-PVA as the main component and polyaryl polymethylene isocyanate (PAPI) as curing agent, the flame-retarding properties of the prepared particle board were investigated to have a limiting oxygen index (LOI) of 27.9, when the loading of P-PU was 18%. Result of TGA showed that compared with normal polyurethane (PU) adhesive, P-PU adhesive can decrease the initial decomposition temperature which prolongs the stage of low-temperature dehydration-carbonization and increases the yield of residue char of wood particleboard at high temperature.
Key words: flame retardance, formaldehyde-free, polyurethane adhesive, wood particleboard
CLC Number:
TQ43
TANG Yong;ZHANG Xiang;YANG Bing;WANG De-yi. Study on Flame-retarding Formaldehyde-free Two-component Waterborne-polyurethane Wood Adhesive[J]. , 2008, 28(3): 35-38.
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