Armstrong Teasdale LLP
Polyurethane or polyurethane-urea aqueous dispersion, preparation method therefor, and use thereof
A self-crosslinkable polyurethane or polyurethane-urea aqueous dispersion, a preparation method therefor, and a use thereof. Side chains of the polyurethane or polyurethane-urea contain non-sterically-hindered siloxy groups. During the drying and activation of the aqueous dispersion, the siloxys in the side chains are hydrolyzed and crosslinked with each other to increase the cross-linking density, significantly improving the heat resistance, the humidity resistance, and other properties of an adhesive obtained therefrom. The aqueous dispersion itself has a good stability. In addition, an application system based thereon has an excellent stability and a long storage time. The aqueous dispersion is suitable for the preparation of high quality paints and sealants, especially adhesives.
WANHUA CHEMICAL (GUANGDONG) CO., LTD. WANHUA CHEMICAL GROUP CO., LTD.
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Xueshun Zhen Tianwen Yuyang Haimei Bin Jiakuan Yunling Yunquan Weiguo
Ji Wang Zhou Cao Wang Zhang Sun Liu Jin Zhao