公开(公告)号：US20210155721A1

公开(公告)日：2021-05-27

申请号：US16305502

申请日：2017-05-24

Applicant: BASF SE

Inventor： Zhong ZENG ,  Harm WIESE ,  Rui DENG

IPC: C08F2/22 ,  C08F283/12 ,  C08F220/10 ,  C09D151/08

Abstract: The present invention relates to an aqueous polymer dispersion containing a multistage emulsion polymer particle. The multistage emulsion polymer particle contains a polysiloxane formed in the first stage; a transition layer formed in the second stage; and a polyacrylate formed in the third stage. The transition layer is made of silane coupling agents. The present invention also relates to a method of preparing the aqueous polymer dispersion and use of the aqueous polymer dispersion for preparing coatings.