Water soluble or dispersible blocked polyisocyanates and a process for
their preparation and use
    1.
    发明授权
    Water soluble or dispersible blocked polyisocyanates and a process for their preparation and use 失效
    水溶性或分散性封端多异氰酸酯及其制备和使用方法

    公开(公告)号:US4895921A

    公开(公告)日:1990-01-23

    申请号:US253179

    申请日:1988-10-04

    摘要: The present invention is directed to water soluble or dispersible blocked polyisocyanates which contain(a) a statistical average per molecule of at least one structural unit corresponding to the formula:B--CO--NH-- wherein B denotes a group obtainable by removal of the acidic hydrogen atom from a monofunctional blocking agent for organic isocyanates and(b) structural units corresponding to the formula ##STR1## in a quantity sufficient to ensure the solubility or dispersibility of the blocked polyisocyanate in water,the blocked polyisocyanates containing on statistical average a total of at least two structural units corresponding to the formulae (a) and (b) per molecule.The present invention also relates to a process for the preparation of these blocked polyisocyanates and to their use in combination with water soluble or dispersible organic compounds containing at least two isocyanate-reactive groups for the production of coated substrates which are cured by heating.

    摘要翻译: 本发明涉及水溶性或分散性封端多异氰酸酯,其含有(a)每分子至少一个对应于下式的结构单元的统计平均数:B-CO-NH-,其中B表示可通过除去酸 来自用于有机异氰酸酯的单官能封端剂的氢原子和(b)对应于式“IMAGE”的结构单元,其量足以确保封端多异氰酸酯在水中的溶解度或分散性,所述封闭多异氰酸酯含有统计学上的平均值 每个分子对应于式(a)和(b)的至少两个结构单元。 本发明还涉及一种制备这些封端多异氰酸酯的方法,以及它们与含有至少两个异氰酸酯反应性基团的水溶性或分散性有机化合物的组合用于生产通过加热固化的涂覆基材的用途。

    Process for the production of coated substrates
    2.
    发明授权
    Process for the production of coated substrates 失效
    生产涂层基材的方法

    公开(公告)号:US4619966A

    公开(公告)日:1986-10-28

    申请号:US795965

    申请日:1985-11-07

    摘要: The present invention is directed to a process for the production of water- and solvent-resistant coated substrates by coating heat-resistant substrates with a solution or dispersion of an anionic group-containing polyisocyanate addition product in an aqueous solvent or dispersant and subsequently thermally treating the coating at a temperature of about 60.degree. to 200.degree. C., with evaporation or vaporization of the solvent or dispersant and simultaneous crosslinking of the polyisocyanate addition product which has been applied to the substrate, characterized in that incorporated anionic structural units corresponding to the formula ##STR1## are used in a quantity of about 5 to 1000 milliequivalents per 100 g of solids and the solids are based on reaction products of organic polyisocyanates with salts of cyanamide and bases selected from ammonia, primary and secondary amines having a minimum pKb value of 3.1, tertiary amines and mixtures thereof. The present invention also relates to the aqueous solutions or dispersions of anionically-modified polyisocyanate addition products.

    摘要翻译: 本发明涉及通过用含有阴离子基团的多异氰酸酯加成产物在水性溶剂或分散剂中的溶液或分散体涂覆耐热基材并随后热处理来生产耐水和耐溶剂的涂布基材的方法 该涂层在约60℃至200℃的温度下,通过溶剂或分散剂的蒸发或蒸发,以及已经施加到基材上的多异氰酸酯加成产物的同时交联,其特征在于结合的阴离子结构单元对应于 式“IMAGE”的使用量为每100g固体约5至1000毫当量,固体是基于有机多异氰酸酯与氰胺和选自氨,最小pKb值的伯胺和仲胺的碱的反应产物 3.1,叔胺及其混合物。 本发明还涉及阴离子改性的多异氰酸酯加成产物的水溶液或分散体。