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林产化学与工业

林产化学与工业 ›› 2008, Vol. 28 ›› Issue (3): 35-38.

• 论文 • 上一篇    下一篇

阻燃型无甲醛双组分水性聚氨酯木材胶黏剂的研究

唐勇, 张翔, 杨冰, 王德义   

  1. 四川大学, 化学学院, 降解与阻燃高分子材料研究中心, 四川, 成都, 610064
  • 收稿日期:2007-05-17 修回日期:1900-01-01 出版日期:2008-06-30 发布日期:2008-06-30

Study on Flame-retarding Formaldehyde-free Two-component Waterborne-polyurethane Wood Adhesive

TANG Yong, ZHANG Xiang, YANG Bing, WANG De-yi   

  1. Center for Degradable and Flame-retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China
  • Received:2007-05-17 Revised:1900-01-01 Online:2008-06-30 Published:2008-06-30

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摘要： 聚乙烯醇(PVA)通过KMnO氧化为氧化聚乙烯醇(O-PVA),然后与亚磷酸二乙酯发生加成反应生成含磷聚乙烯醇(P-PVA),通过红外光谱和核磁共振确定了其结构.将P-PVA作为双组分水性聚氨酯主剂,多亚甲基多苯基异氰酸酯(PAPI)作为固化剂,考察了所制备的胶黏剂在木材刨花板中的阻燃性能.当施胶量为18%时,刨花板的极限氧指数(LOI)为27.9.热重分析表明,添加了以P-PVA为主剂的聚氨酯胶(P-PU)后,与普通聚氨酯胶(PU)相比,木材刨花板初始分解温度提前,延长了低温脱水炭化阶段,同时提高了在高温下的残炭量.

关键词: 阻燃, 无醛, 聚氨酯胶黏剂, 木材刨花板

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

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