以聚乙烯醇（PVA）为高分子分散剂,丙烯酸（AA）、N-羟甲基丙烯酰胺（NMA）、苯乙烯（St）、丙烯酸丁酯（BA）为单体,采用无皂种子乳液聚合法制备了稳定且性能优异的丙烯酸树脂乳液。以此丙烯酸树脂乳液为主剂,硅溶胶（Sil）和封端异氰酸酯（HDI）为外加交联剂复合制得性能优异的无醛人造板粘合剂。实验讨论了其合成影响因素,并优化了合成工艺条件。研究表明,当m（PVA）=8%,m（AA）=8%,m（NMA）=4%,n（BA）∶n（St）=2∶1,m（Sil）=10%,m（HDI）=8%时,此粘合剂具有优异的应用效果。当以施胶量为250g/m2进行施胶时,细木工板的胶合强度达0.82MPa,横向静曲强度达20.5MPa,均符合国家标准。并用IR、TG对其进行了表征。
With polyvinyl alcohol（PVA） as polymeric colloid stabilizer,a kind of surfactant-free copolystyrene-acrylat latex with good stable and excellent property was successfully synthesized by reacting styrene（St）,butyl acrylate（BA）,N-hydroxymethyl acrylamide（NMA） and acrylic acid（AA）.The copolystyrene-acrylat latex as the main agent,silicasol and isocyanate as cross-linking agent,a kind of wood adhesive without formaldehyde was synthesized by copolystyrene-acrylat latex,silicasol and isocyanate.At the same time,the factors affecting its synthetic condition were discussed,and the synthetic process was optimized.The results show that adhesive owns excellent property when m（PVA）=8%,m（AA）=8%,m（NMA）=4%,n（BA）∶n（St）=2∶1,m（Sil）=10%,m（HDI）=8%.When the resin content is 250g/m2 on the application experiment,the plank bonding strength reaches 0.82MPa and the static strength reaches 20.5MPa.The outcome conformed the national standards.And it was characterized by the method of IR and TG.
参考文献
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