公开(公告)号：WO2022055511A1

公开(公告)日：2022-03-17

申请号：PCT/US2020/050740

申请日：2020-09-14

Applicant: CELANESE INTERNATIONAL CORPORATION

Inventor： MÜLLER, Harmin ,  KUPKA, Christopher

IPC: C08F2/24 ,  C08L31/04 ,  C08F220/14 ,  C09J131/04 ,  C09J133/12

Abstract: The present invention relates an emulsifier stabilized formulated copolymer dispersion, processes for forming the emulsifier stabilized formulated copolymer dispersion, and to uses thereof. The emulsifier stabilized formulated copolymer dispersion may be formed by polymerizing at least one monomer in the presence of a stabilizer package, to form an emulsifier stabilizer copolymer dispersion, and introducing a post-addition comprising a polyvinyl alcohol solution to the emulsifier stabilized copolymer dispersion to form an emulsifier stabilized formulated copolymer dispersion. The polyvinyl alcohol, added as solution, may be added in an amount from 1 to 10 % by weight, solid polyvinyl alcohol based on solids content of the emulsifier stabilized copolymer dispersion. The polyvinyl alcohol may have a molecular weight expressed as viscosity from 3 mPa·s to 60 mPa·s based on a 4 % solution at 20 °C and a degree of hydrolysis from 70 mol.% to 85 mol.%, preferably from 78 mol.% to 82 mol.%, more preferably 80 mol.%.