This invention provides stable aqueous compositions including stable coating compositions, and methods of their production. The stable aqueous compositions and stable aqueous coating compositions comprise i) an aqueous dispersion of one or more emulsion-polymerized addition polymer comprising polymerized units of one or more carboxylester monomer, wherein at least one carboxylester monomer is a vinyl ester monomer; ii) one or more carboxylesterase enzyme; iii) one or more mono-alcohol with a formula molecular weight of less than 76; iv) optionally, acetaldehyde; and v) optionally, one or more organic carboxylester with a normal boiling point of less than 150° C.; and wherein the aqueous composition has a headspace volatile organic compound
(VOC) content, as measured by headspace gas chromatography-mass spectrometry (GC-MS) at 33° C., characterized by a content of less than 10 ppm of acetaldehyde, and less than 10 ppm of the one or more organic carboxylester, and more than 50 ppm of the one or more mono-alcohol. Preferably, the ester hydrolysis activity in the composition is less than 0.010 micromole/minute.
本发明提供了稳定的
水性组合物,包括稳定的涂料组合物及其生产方法。稳定的
水性组合物和稳定的
水性涂料组合物包括:i)一种或多种乳液聚合加成
聚合物的
水性分散体,其中包括一种或多种
羧酸酯单体的聚合单元,其中至少一个
羧酸酯单体是一种
乙烯酸
酯单体;ii)一种或多种
羧酸酯酶;iii)一种或多种分子量小于76的单一醇;iv)可选的
乙醛;v)可选的一种或多种有机
羧酸酯,其正常沸点小于150°C。其中,
水性组合物在33°C下通过顶空气相色谱质谱(GC-MS)测量的挥发性有机化合物(VOC)含量的特征是,
乙醛含量小于10ppm,一种或多种有机
羧酸酯含量小于10ppm,一种或多种单一醇含量大于50ppm。优选地,组合物中的
酯水解活性小于0.010微摩尔/分钟。