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51. 发明授权

US5959061A Hardeners for water-dilutable epoxy resin systems with a potlife indication 失效
标题翻译：用于水可稀释环氧树脂体系的硬化剂，具有适用期
公开(公告)号：US5959061A
公开(公告)日：1999-09-28
申请号：US900519
申请日：1997-07-25
申请人： Uwe Neumann , Martin Gerlitz
发明人： Uwe Neumann , Martin Gerlitz
IPC分类号： C08G59/14 , C08G59/04 , C08G59/18 , C08G59/50 , C08G59/44
CPC分类号： C08G59/184 , C08G59/04 , C08G59/182
摘要： Water-dispersible curing agents for epoxy resins are disclosed which, as a mixture with epoxy resins, have a potlife indication by showing the end of the processing time by a clear increase in viscosity, and which comprise reaction products (ABC) of adducts of aliphatic polyols (A) with a weight-average molar mass of from 200 to 20, 000 g/mol, comprising at least one polyol (A1) having a molar mass of less than 4000 g/mol, and at least one polyol (A2) having a molar mass of more than 4000 g/mol, and at least one epoxide compound (B) having at least two epoxide groups per molecule, and a specific epoxide group content of from 500 to 10 000 mmol/kg, (A1) and (A2) being reacted separately or as a mixture with (B), and then reacting this adduct with one or more polyamines (C) having at least three amine hydrogen atoms and at least one primary amino group per molecule, the ratio of the number of hydroxyl groups of component (A) to the number of epoxide groups of component (B) being 1:3 to 1:10, and the ratio of the number of remaining epoxide groups in the epoxide-polyol adduct to the number of amine hydrogen atoms in polyamines (C) being 1:1.5 to 1:100. The water-dispersible curing agents are useful as curing agents for epoxy resins in two component coating compositions.
摘要翻译：公开了用于环氧树脂的水分散性固化剂，其作为与环氧树脂的混合物具有通过显示粘度明显增加显示加工时间结束的固化指示，并且其包含脂肪族的加成物的反应产物（ABC）包含至少一种摩尔质量小于4000g / mol的多元醇（A1）和至少一种多元醇（A2）的多元醇（A），其重均摩尔质量为200至20,000g / mol，摩尔质量大于4000g / mol，和至少一种每分子具有至少两个环氧基团的环氧化合物（B），特定的环氧基团含量为500至1000000mmol / kg，（A1）和（A2）分别反应或与（B）的混合物反应，然后使该加合物与每分子具有至少三个胺氢原子和至少一个伯氨基的一种或多种多胺（C）反应，数量比的组分（A）的羟基与组分（B）的环氧基数为1：3至1 10，环氧多元醇加成物中剩余的环氧基数与多胺（C）中胺氢原子数的比例为1:1.5〜1:100。水分散性固化剂可用作双组分涂料组合物中环氧树脂的固化剂。

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