用于隔离涂料的聚合物含水分散体

Aqueous polymer dispersion for barrier coating

Abstract

The invention relates to a polymer aqueous dispersion obtainable from a monomer mixture comprising by weight a) 100 parts of at least one type of ethylenically unsaturated monomer devoid of an ionic group, b) from 0.5 to 15 parts at least one type of ethylenically unsaturated monomer carrier of at least one carboxylic and/or carboxylic anhydride function, c) at least one type of ethylenically unsaturated monomer carrier of at least one second functionality selected from: phosphate, phosphonate, phosphinate in a such quantity that a ratio c/(b+c) ranges from 0,05 to 0,4, d) from 0 to 2 parts of at least one type of ethylenically unsaturated monomer carrier of at least one alcoxysilane function, e) from 0 to 5 parts of at least one type of ethylenically unsaturated monomer carrier of at least one active carbonyl function or other reactive function with an aldehyde function such as ureido or morpholine, imidazoline, oxazolodine and aziridine derivative or an amine function and f) from 0 to 10 parts, preferably from 2 to 8, of at least one type of ethylenically unsaturated monomer carrier of at least one function selected from hydroxy and primary or secondary amine. A preparation method, a coating composition comprising said dispersion and the use thereof in the form of coatings for metal or plastic substrates, in particular anticorrosive coatings for metal substrate are also disclosed.
本发明涉及一种含水聚合物分散体,它可以由包括以下组分的单体混合物(按重量)获得:a)100份的至少一种不含离子基的烯属不饱和单体;b)0.5~15份的至少一种载有至少一个羧基和/或羧酸酐官能团的烯属不饱和单体;c)至少一种载有至少一个选自磷酸酯、膦酸酯或亚膦酸酯的第二官能团的烯属不饱和单体,该单体以c/(b+c)比值范围为0.05~0.4的量存在;d)0~2份的至少一种载有至少一个烷氧基硅烷官能团的烯属不饱和单体;e)0~5份的至少一种载有至少一个活性羰基官能团官或其它与醛官能团反应的官能团如脲基衍生物、吗啉、咪唑啉、噁唑烷、氮丙啶、或胺官官能团的烯属不饱和单体;f)0~10份、优选2~8份的至少一种载有至少一个选自羟基和伯或仲胺的官能团或载有此类官能团的前体基团的烯属不饱和单体。本发明还涉及一种包括所述分散体的涂料组合物的制备方法及其在金属或塑料基材上形成涂层的用途,尤其是用于金属的防腐蚀涂层。

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