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1. 发明授权

US06699958B1 Colorless phenol-formaldehyde resins that cure colorless 失效
标题翻译：无色酚醛树脂固化无色
公开(公告)号：US06699958B1
公开(公告)日：2004-03-02
申请号：US10365873
申请日：2003-02-13
申请人： William D. Detlefsen
发明人： William D. Detlefsen
IPC分类号： C08G1408
CPC分类号： C08G8/32
摘要： The present invention is directed to compositions and a process leading to colorless or light colored aqueous phicinol-formaldelhyde resoles. Unlike previous technologies, these compositions lead to clear storage stable fast curing, high molecular weight resins. These materials are also capable of producing composite wood panels with superior water absorption and thickness swell test results when soaked in water. The invention essentially consists of an aqueous copolymer of phenol, formaldehyde, and a phenolic carboxylate (e.g. salicylic acid). Methylol phenols are formed under alkaline conditions in the presence of metal chelating agents. These are then condensed into a polymer under alkaline, neutral or acidic conditions. The finished aqueous polymer solution is then acidified to the desired pH using a benzoic acid or a phelnol-carboxylic acid.
摘要翻译：本发明涉及组合物和一种导致无色或浅色的含有精氨酸 - 正癸醛水溶液的方法。与以前的技术不同，这些组合物导致清晰的储存稳定快速固化，高分子量树脂。这些材料也可以生产复合木板，当浸泡在水中时具有优异的吸水性和厚度溶胀试验结果。本发明基本上由苯酚，甲醛和酚羧酸酯（例如水杨酸）的含水共聚物组成。在金属螯合剂存在下，在碱性条件下形成羟甲基酚。然后将它们在碱性，中性或酸性条件下浓缩成聚合物。然后使用苯甲酸或吡咯烷羧酸将最终的聚合物水溶液酸化至所需的pH。

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