Aqueous polyurethane dispersions and coatings prepared therefrom
    2.
    发明授权
    Aqueous polyurethane dispersions and coatings prepared therefrom 失效
    由其制备的水性聚氨酯分散体和涂层

    公开(公告)号:US06265468B1

    公开(公告)日:2001-07-24

    申请号:US09355449

    申请日:2000-03-07

    IPC分类号: C08K320

    摘要: The present invention is directed to two- and three- component aqueous polyurethane composition which are cured at ambient temperature and have excellent chemical resistance without reduction in abrasion resistance and flexibility. The two component system comprises a first component of a hydroxy functional aqueous polyurethane dispersion and phenoxy resin blended together, and a second component of polyisocyanate. The three component system comprises a first component of a hydroxy functional aqueous polyurethane dispersion, a second component of epoxy resin; and a third component of polyisocyanate. Generally, the mass of the epoxy or phenoxy resins is 1 to 50% of mass of the polyurethane solids in the dispersion and the mass of the polyisocyanate is 50 to 200% of the mass of the polyurethane solids in the dispersion. The two or three component polyurethane composition has a mass fraction of solids of preferably 10-50%.

    摘要翻译: 本发明涉及在环境温度下固化并具有优异的耐化学性而不降低耐磨性和柔软性的二组分和三组分水性聚氨酯组合物。 双组分体系包括羟基官能水性聚氨酯分散体和苯氧基树脂共混的第一组分和多异氰酸酯的第二组分。 三组分体系包括羟基官能水性聚氨酯分散体的第一组分,环氧树脂的第二组分; 和多异氰酸酯的第三组分。 通常,环氧树脂或苯氧基树脂的质量是分散体中聚氨酯固体质量的1至50%,多异氰酸酯的质量为分散体中聚氨酯固体质量的50至200%。 两组分或三组分聚氨酯组合物的固体质量分数优选为10-50%。