Waterborne polyamide and their chain extension with isocyanates to form cationic waterborne polyureas dispersions
申请人:Lubrizol Advanced Materials, Inc.
公开号:US10640616B2
公开(公告)日:2020-05-05
An improved process for forming polyamide dispersions in water utilizing carbon dioxide to facilitate dispersion of the polyamide is disclosed. The polyamides are generally below 30,000 or 40,000 g/mole molecular weight when dispersed, but can be chain extended with polyfunctional species such as polyisocyanates after dispersion. The dispersions are useful in coatings, adhesives, and inks. Composites and hybrids of these other polyamides with vinyl polymers are also disclosed and claimed.
本发明公开了一种在水中形成聚酰胺分散体的改进工艺,利用二氧化碳促进聚酰胺的分散。分散后的聚酰胺分子量一般低于 30,000 或 40,000 克/摩尔,但在分散后可以用多官能团(如多异氰酸酯)进行链延伸。分散体可用于涂料、粘合剂和油墨。此外,还公开了这些其他聚酰胺与乙烯基聚合物的复合材料和混合物。