公开(公告)号：US20190300657A1

公开(公告)日：2019-10-03

申请号：US16317128

申请日：2017-07-10

Applicant: BASF SE

Inventor： Faissal-Ali El-Toufaili ,  Timo Laubscher ,  Juergen Detering ,  Martin Keller ,  Ines Debeasuvais De Vasconcelos ,  Dominik Lanzinger

IPC: C08J3/12 ,  C08F6/02 ,  C08L33/02 ,  C08J3/05

Abstract: Described herein is a process for preparing solid acrylic acid polymers including: (a) preparing an aqueous acrylic acid polymer solution having a solids content of 30% to 70% by weight by free-radical polymerization, (b) neutralizing the aqueous acrylic acid polymer solution at least partly by adding a base, which results in release of a heat of neutralization, and concentrating the aqueous acrylic acid polymer solution by exploiting the heat of neutralization to give a highly concentrated acrylic acid polymer solution having a solids content of 60% to 80% by weight, (c) shaping and drying the highly concentrated acrylic acid polymer solution.