摘要:
Aqueous self-crosslinking copolymer dispersions ABC obtainable by free-radically initiated copolymerization in the first stage of a monomer mixture A comprising olefinically unsaturated monomers A1 having carbonyl groups, unsaturated carboxylic acids or monoesters of unsaturated dicarboxylic acids A2, monomers A3 selected from vinylaromatic compounds, n-butyl methacrylate and also alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, esters A4 selected from alkyl esters of unsaturated carboxylic acids of dialkyl esters of unsaturated dicarboxylic acids, and other free-radically polymerizable monomers A5, and subsequent addition of a second monomer mixture B and further polymerization in the second stage, the mixture B comprising olefinically unsaturated monomers B1 corresponding to A1, esters B2 corresponding to A4, and monomers B3 corresponding to A5, and subsequently adding compounds C having hydrazine or hydrazide groups.
摘要:
The invention relates to self-crosslinking aqueous polyurethane dispersions containing a crosslinking agent I selected from diamones I1 and dihydrazides I2, and polyurethanes comprising structural elements derived from polyisocyanates A, polyols B having a number average molar mass Mn of at least 400 g/mol, compounds D comprising at least two groups which are reactive compared to isocyanate groups and at least one group able to form anions, low-molecular polyols E that carry no other reactive groups compared to isocyanate groups, compounds F containing at least one group which is reactive compared to isocyanate, and at least one aldehyde-type or ketone-type carbonyl group, and compounds G that are monofunctional compared to isocyanates or contain active hydrogen with different capabilities of reaction and are different from the compounds E. The invention also relates to methods for the production of said dispersions, and coating agents containing the same.
摘要翻译:本发明涉及含有选自二亚胺I 1和二酰肼I 2的交联剂I的自交联水性聚氨酯分散体,以及包含衍生自多异氰酸酯A的结构元素的聚氨酯,多元醇B的数均摩尔质量M N 至少400g / mol的化合物D包含至少两个与异氰酸酯基团反应的基团和至少一个能够形成阴离子的基团,与异氰酸酯基团相比不含其它反应性基团的低分子多元醇E,化合物F 含有至少一个与异氰酸酯反应的基团,以及至少一种醛型或酮型羰基,以及与异氰酸酯或具有不同反应能力的不同于化合物的活性氢的单官能化合物G 本发明还涉及生产所述分散体的方法和含有该分散体的包衣剂。