Stable aqueous dispersions of hydrophilic phenolic resins having low xylenol and bisphenol-A content
    1.
    发明授权
    Stable aqueous dispersions of hydrophilic phenolic resins having low xylenol and bisphenol-A content 有权
    具有低二甲苯酚和双酚-A含量的亲水性酚醛树脂的稳定水性分散体

    公开(公告)号:US07442741B2

    公开(公告)日:2008-10-28

    申请号:US11102865

    申请日:2005-04-11

    IPC分类号: C09D161/10 C09D161/14

    摘要: Storage stable aqueous dispersions of a heat-reactive hydrophilic phenolic resin (e.g., phenol/formaldehyde) are disclosed. The dispersions comprise a base resin that is the reaction product of an aromatic alcohol and an aldehyde, and an etherified resin component selected from the group consisting of an etherified phenol/aldehyde resin, an etherified cresol/aldehyde resin, and mixtures thereof. The dispersions further comprise a protective colloid (e.g., polyvinyl alcohol). The addition of the etherified resin component in an amount of at least about 20% by weight of the base resin provides storage stability, but does not adversely affect the desirable physical and chemical characteristics (e.g., chemical resistance) of end products made from such dispersions. Moreover, the dispersions of the present invention can avoid the use of etherified resin components derived from bisphenol-A and/or xylenols, which present heath concerns in food coating applications.

    摘要翻译: 公开了热反应性亲水性酚醛树脂(例如苯酚/甲醛)的储存稳定的水性分散体。 分散体包含作为芳香醇和醛的反应产物的基础树脂和选自醚化的酚/醛树脂,醚化的甲酚/醛树脂及其混合物的醚化的树脂组分。 分散体还包含保护胶体(例如聚乙烯醇)。 基于树脂的至少约20重量%的醚化树脂组分的添加提供了储存稳定性,但不会不利地影响由这种分散体制成的最终产品的理想的物理和化学特性(例如,耐化学性) 。 此外,本发明的分散体可以避免使用衍生自双酚A和/或二甲苯酚的醚化树脂组分,这在食品涂料应用中具有重要的意义。

    Stable phenolic resin polymer dispersions having low free aldehyde content
    2.
    发明授权
    Stable phenolic resin polymer dispersions having low free aldehyde content 有权
    稳定的酚醛树脂聚合物分散体具有低游离醛含量

    公开(公告)号:US07671097B2

    公开(公告)日:2010-03-02

    申请号:US11135635

    申请日:2005-05-24

    IPC分类号: B01F3/12 C08L61/06

    摘要: Stable dispersions of phenolic resins, particularly bisphenol-A/formaldehyde resins, for use in e.g., baking enamels, coatings, adhesives, binders, etc., are disclosed. The dispersions have low levels (e.g.,

    摘要翻译: 公开了用于例如烘烤搪瓷,涂料,粘合剂,粘合剂等的酚醛树脂,特别是双酚A /甲醛树脂的稳定分散体。 分散体具有低水平(例如,<0.1重量%)的游离醛,从而减少与醛排放相关的环境危害。 在制备过程中使用三聚氰胺作为醛清除剂可获得低游离醛水平。 现在已经发现,与其它醛类清除剂相反,三聚氰胺对分散稳定性没有不利影响,干扰后续加工操作或者对最终树脂产品质量(例如,固化后)产生负面影响。