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2. 发明授权

US5010156A Organosolv lignin-modified phenolic resins and method for their preparation 失效
标题翻译：有机溶剂木质素改性酚醛树脂及其制备方法
公开(公告)号：US5010156A
公开(公告)日：1991-04-23
申请号：US491802
申请日：1990-03-12
申请人： Phillip M. Cook , Steven L. Hess
发明人： Phillip M. Cook , Steven L. Hess
IPC分类号： C08G14/14 , C08L61/00 , C08L97/02
CPC分类号： C08H6/00 , C08G14/14 , C08L61/00 , C08L97/02
摘要： A lignin-modified phenol-formaldehyde resin for use as an adhesive for particulate wood products is disclosed which is prepared by reacting phenol and formaldehyde with an aqueous alkaline solution of an organosolv lignin. The organosolv lignin used in the formation of the resin is obtained from a pulping liquor prepared from particulate wood material from hardwood trees, aqueous polar organic solvent, and an acid catalyst. The resin allows for replacement of phenol or organosolv lignin at a level of up to 40% without detrimentally affecting its performance in terms of bonding strength or durability. The resin of the present invention is also superior to prior art lignin-modified resins in that it is low in sulfate, ash and sulfur residues, and thus will not give off distracting or harmful sulfur odors during resin preparation or hot-pressing of the adhesive and is unaffected and not solubilized by water.
摘要翻译：公开了一种木质素改性的酚醛树脂，其用作颗粒状木制品的粘合剂，其通过使酚和甲醛与有机溶剂木质素的碱性水溶液反应制备。用于形成树脂的有机溶胶木质素是从由硬木树脂，极性有机有机溶剂和酸催化剂的颗粒木材制备的制浆液获得的。树脂可以以高达40％的水平替代苯酚或有机溶剂木质素，而不会在粘合强度或耐久性方面不利地影响其性能。本发明的树脂还优于现有技术的木质素改性树脂，因为它的硫酸盐，灰分和硫残留量低，因此在树脂制备或热压粘合剂期间不会发出分散注意力或有害的硫气味并且不受影响并且不被水溶解。

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