Aqueous covering for food container
    42.
    发明专利
    Aqueous covering for food container 有权
    食品容器的水质覆盖

    公开(公告)号:JP2006169535A

    公开(公告)日:2006-06-29

    申请号:JP2005364412

    申请日:2005-12-19

    Abstract: PROBLEM TO BE SOLVED: To provide an aqueous covering composition for an inner veil of food packages contacting to food for a long time and releasing no blocking agent during crosslinking.
    SOLUTION: The aqueous covering composition comprises a mixture of (A) a polyisocyanate having, on the average, two or more NCO groups per one molecule, wherein ≥85% NCO group is blocked with a blocking agent containing ε-caprolactam, p-hydroxycarboxylic acid or an aliphatic alcohol, and (B) a hydrophilic polyester polyol or a hydrophilic and nonhydrophilic polyester polyol, having, on the average, two or more reactive hydroxy per a molecule [the component (B) has acid value of ≥15 mgKOH/g, hydroxy value of 20-300 mgKOH/g and weight average molecular weight Mw of >1,500 g/mol], wherein equivalent ratio of blocked isocyanate group of the component (A) to isocyanate reactive group of the component (B) is 0.5-5.0:1.
    COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题:提供一种长时间与食品接触的食品包装内面的水性覆盖组合物,并且在交联期间不释放封闭剂。 水性覆盖组合物包含(A)每一分子平均具有两个或更多个NCO基团的多异氰酸酯的混合物,其中≥85%的NCO基团用含有ε-己内酰胺的封闭剂封闭, 对 - 羟基羧酸或脂族醇,和(B)亲水性聚酯多元醇或亲水性和非亲水性聚酯多元醇,其每分子平均具有两个或更多个反应性羟基(组分(B))的酸值≥ 15mgKOH / g,羟基值为20-300mgKOH / g,重均分子量Mw> 1,500g / mol],其中组分(A)的封端异氰酸酯基与组分(B)的异氰酸酯反应性基团的当量比 )为0.5-5.0:1。 版权所有(C)2006,JPO&NCIPI

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