公开(公告)号：US20150027956A1

公开(公告)日：2015-01-29

申请号：US14513237

申请日：2014-10-14

Applicant: BASF SE

Inventor： Juergen DETERING ,  Bolette URTEL ,  Stephan NIED ,  Ewald HEINTZ

IPC: C02F5/14

CPC classification number: C02F5/145 ,  C02F5/10 ,  C02F2103/023 ,  C02F2103/08 ,  C02F2303/22

Abstract: The invention relates to an aqueous solution of acrylic acid polymers, obtainable by polymerization of acrylic acid in feed mode with peroxodisulfate as initiator in the presence of hypophosphite in water as solvent, wherein (i) water and optionally one or more ethylenically unsaturated comonomers are initially charged, and (ii) acrylic acid in acidic, unneutralized form, optionally one or more ethylenically unsaturated comonomers, aqueous peroxodisulfate solution and aqueous hypophosphite solution are added continuously, and (iii) a base is added on completion of the acrylic acid feed to the aqueous solution, wherein the comonomer content does not exceed 30% by weight, based on total monomer content.

Abstract translation: 本发明涉及丙烯酸聚合物水溶液，其可通过丙烯酸以进料方式与过氧二硫酸盐作为引发剂在次亚磷酸盐存在下作为溶剂在水中的聚合反应获得，其中（i）水和任选的一种或多种烯键式不饱和共聚单体最初是 带电，和（ii）酸性，未中和形式的丙烯酸，任选的一种或多种烯键式不饱和共聚单体，过二硫酸氢盐水溶液和次磷酸钠水溶液，并且（iii）在丙烯酸进料完成后加入碱 水溶液，其中基于总单体含量，共聚单体含量不超过30重量％。