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    • 3. 发明授权
    • Method of making resin impregnated fibrous panels
    • 树脂浸渍纤维板的制造方法
    • US5368803A
    • 1994-11-29
    • US17216
    • 1993-02-12
    • Mark J. BrowRonald P. Pitsch
    • Mark J. BrowRonald P. Pitsch
    • C08J5/24C08K7/02B29C67/14C08G14/10C08K7/14
    • C08K7/02C08J5/24C08J2361/34
    • A fibrous resinated panel is provided which when used in a closed environment releases relatively minor amounts of trimethylamines, aldehydes and phenolic compounds into the closed environment. The panel is formed by compressing a fibrous mat impregnated with a thermosetting resin system in a mold cavity defined between an upper and a lower inner mold surface at a temperature between 400.degree. to 600.degree. for 45 to 90 seconds whereby the thermosetting resin is substantially cured and the mat is shaped to conform to a desired contour prior to removing the mat from the mold cavity. The thermosetting resin system used to impregnate the mat includes an essentially aqueous A-stage form resole-melamine composition containing residues of free melamine(s) to free aldehyde(s) to free phenolic compound(s) in a molar equivalent ratio ranging from about 0.2:1.5:1 to about 0.8:3.5:1.
    • 提供了一种纤维树脂板,当在封闭环境中使用时,将较少量的三甲胺,醛和酚类化合物释放到封闭环境中。 面板是通过将浸渍有热固性树脂体系的纤维垫压在400至600度之间的温度在45至90秒的上下模具表面之间的模具腔中而形成的,由此热固性树脂基本上固化 并且垫子被成形为在从模腔中移除垫子之前使其符合期望的轮廓。 用于浸渍垫的热固性树脂体系包括基本上含水的A阶甲阶酚醛 - 三聚氰胺组合物,其含有游离醛的游离三聚氰胺残余物以游离酚类化合物,其摩尔当量比为约 0.2:1.5:1至约0.8:3.5:1。