Aqueous polyurethane dispersions containing phenolic resin moieties
    14.
    发明授权
    Aqueous polyurethane dispersions containing phenolic resin moieties 失效
    含有酚醛树脂部分的水性聚氨酯分散体

    公开(公告)号:US06350811B1

    公开(公告)日:2002-02-26

    申请号:US09489064

    申请日:2000-01-21

    IPC分类号: C08J300

    摘要: A water-dispersible polyurethane resin is disclosed. The resin comprises recurring units of an alkoxylated phenolic resin, a carboxylate-containing diol, and a multifunctional isocyanate. The resin, which can be neutralized, and/or chain-extended, is dispersed in water to form a polyurethane dispersion. Coatings derived from the polyurethane dispersions have excellent acid and chemical resistance.

    摘要翻译: 公开了一种水分散性聚氨酯树脂。 树脂包含烷氧基化酚醛树脂,含羧酸酯的二醇和多官能异氰酸酯的重复单元。 可以中和和/或链延长的树脂分散在水中以形成聚氨酯分散体。 衍生自聚氨酯分散体的涂料具有优异的耐酸和耐化学性。

    Polyisocyanates containing uretidione and allophanate groups, a process
for their production, and their use in one and two component coating
compositions
    16.
    发明授权
    Polyisocyanates containing uretidione and allophanate groups, a process for their production, and their use in one and two component coating compositions 失效
    含有脲基二酮和脲基甲酸酯基团的多异氰酸酯,其生产方法及其在一种和两种组分涂料组合物中的用途

    公开(公告)号:US5461135A

    公开(公告)日:1995-10-24

    申请号:US311691

    申请日:1994-09-23

    摘要: Disclosed herein is a liquid, monoallophanate-containing, monouretidione-containing polyisocyanate composition characterized by having (i) an isocyanate functionality of between 2.8 and 6.5, (ii) a free NCO content of 10% to 47% by weight, (iii) a viscosity of less than 1000 cp (25.degree. C.), and (iv) the presence of monouretidione and monoallophanate groups in a molar ratio of said monouretidione groups to said monoallophanate groups of between about 20:1 and about 1:5. Also disclosed is a process for producing the above compositions, as well as their use, optionally in blocked form in one or two component coating compositions.

    摘要翻译: 本文公开了一种含有单脲基甲酸酯的含单脲基二萜的多异氰酸酯组合物,其特征在于具有(i)异氰酸酯官能度为2.8至6.5,(ii)游离NCO含量为10重量%至47重量%,(iii) 粘度小于1000cp(25℃),和(iv)单脲基二酮和单脲基甲酸酯基团的存在与所述单脲基甲酸酯基团的摩尔比为约20:1至约1:5。 还公开了一种制备上述组合物的方法,以及它们在一种或两种组分涂料组合物中任选地以封闭形式使用的方法。