发明名称 COLORLESS PHENOL-FORMALDEHYDE RESINS THAT CURE COLORLESS
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.
申请公布号 PL376615(A1) 申请公布日期 2006.01.09
申请号 PL20030376615 申请日期 2003.03.04
申请人 HEXION SPECIALTY CHEMICALS, INC. 发明人 DETLEFSEN WILLIAM D.
分类号 C08G8/10;C08G8/32 主分类号 C08G8/10
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