公开(公告)号：US09458273B2

公开(公告)日：2016-10-04

申请号：US14390076

申请日：2013-04-03

Applicant: RHODIA OPERATIONS

Inventor： Patrick Ferlin ,  James Wilson ,  Fadila Benachich

IPC: C08F220/06 ,  C08F120/06 ,  C08F4/40

CPC classification number: C08F220/06 ,  C08F4/40 ,  C08F120/06

Abstract: The present invention concerns a method for preparing a polymer comprising a step of radical polymerization of monomers comprising at least monomers (M1) chosen from acrylic acid, one of the salts of same, or the mixture thereof, in which said radical polymerization step is carried out: continuously; at a pH which remains between 3 and 5 during the polymerization step; in the presence of a metabisulfite/persulfate redox pair, for example the sodium metabisulfite/sodium persulfate pair, as a radical initiator, with a metabisulfite/persulfate molar ratio of between 1 and 3.5 and an initiator/monomer molar percentage of between 5% and 18%.

公开(公告)号：US20150112033A1

公开(公告)日：2015-04-23

申请号：US14390076

申请日：2013-04-03

Applicant: RHODIA OPERATIONS

Inventor： Patrick Ferlin ,  James Wilson ,  Fadila Benachich

IPC: C08F220/06

CPC classification number: C08F220/06 ,  C08F4/40 ,  C08F120/06

Abstract: The present invention concerns a method for preparing a polymer comprising a step of radical polymerisation of monomers comprising at least monomers (M1) chosen from acrylic acid, one of the salts of same, or the mixture thereof, in which said radical polymerisation step is carried out: continuously; at a pH which remains between 3 and 5 during the polymerization step; in the presence of a metabisulfite/persulfate redox pair, for example the sodium metabisulfite/sodium persulfate pair, as a radical initiator, with a metabisulfite/persulfate molar ratio of between 1 and 3.5 and an initiator/monomer molar percentage of between 5% and 18%.

Abstract translation: 本发明涉及一种制备聚合物的方法，包括使包含至少单体（M1）的单体自由基聚合的步骤，所述单体选自丙烯酸，其中一种盐或其混合物，其中所述自由基聚合步骤被携带在其中 不断地 在聚合步骤期间保持在3和5之间的pH; 在偏亚硫酸氢盐/过硫酸盐氧化还原对的存在下，例如焦亚硫酸钠/过硫酸钠对，作为自由基引发剂，偏亚硫酸氢盐/过硫酸盐摩尔比为1至3.5，引发剂/单体摩尔百分比为5％至 18％。