COATING METHOD AND HARDENER FOR POLYURETHANE PAINT
    8.
    发明公开
    COATING METHOD AND HARDENER FOR POLYURETHANE PAINT 审中-公开
    BESCHICHTUNGSVERFAHREN UNDHÄRTERFÜRPOLYURETHANLACK

    公开(公告)号:EP2869940A1

    公开(公告)日:2015-05-13

    申请号:EP13732978.5

    申请日:2013-07-03

    IPC分类号: B05D7/00 C08G18/79

    摘要: [Problem] In a coating method of a two-coat one-bake system where a clear coat paint is coated after a base coat paint is coated, then these two coated layers are simultaneously hardened, adhesive strength between the two coated layers is to increase in comparison with the conventional method. [Solution] Provided is a coating method; A specific hardener is used in the clear coat paint. The hardener is one containing a polyisocyanate derived from 1,6-hexamethylene diisocyanate, satisfying all the following conditions: 1) Hardener does not virtually include diisocyanate monomer, 2) Viscosity of hardener is not more than 1000 mPa·s/23° C., 3) Content of HDI trimer in hardener is not less than 60 weight %, and 4) Content of HDI dimer in hardener is less than 10 weight %.

    摘要翻译: [问题]在涂布底漆之后涂布透明涂料的双层单烘烤系统的涂布方法中,这两层涂层同时硬化,两层涂层之间的粘合强度增加 与传统方法相比。 [溶液]提供涂布方法; 在透明涂料中使用一种特定的硬化剂。 固化剂是含有1,6-六亚甲基二异氰酸酯的多异氰酸酯,其满足以下所有条件:1)固化剂实际上不包括二异氰酸酯单体,2)硬化剂粘度不大于1000mPa·s / 23℃ ,3)硬化剂中HDI三聚体的含量不小于60重量%,4)硬化剂中HDI二聚体的含量小于10重量%。