公开(公告)号：US20200216622A1

公开(公告)日：2020-07-09

申请号：US16628689

申请日：2018-07-06

Applicant: BASF SE

Inventor： Rüdiger FUNK ,  Thomas PFEIFFER ,  Matthias WEISMANTEL ,  Monte Alan PETERSON ,  Karl POSSEMIERS ,  Ronny DE KAEY

IPC: C08J3/12 ,  C08J3/075 ,  C08J3/24 ,  B07B1/46

Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising surface postcrosslinking, classifying the surface postcrosslinked superabsorbent polymer particles, deagglomerating the separated oversize fraction using a roll crusher and recycling the disintegrated oversize fraction before or into the classification of the surface postcrosslinked superabsorbent polymer particles.

公开(公告)号：US20150376318A1

公开(公告)日：2015-12-31

申请号：US14763185

申请日：2014-01-20

Applicant: BASF SE

Inventor： Monica HAAG ,  Roland KRAUSS ,  Thomas GIEGER ,  Volker KLOCK ,  Matthias WEISMANTEL

IPC: C08F222/10

CPC classification number: C08F222/1006 ,  A61L15/60 ,  C08F2/10 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02 ,  C08F2222/1026 ,  C08L33/08

Abstract: A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.

Abstract translation: 一种生产具有高自由溶胀速率和高离心保留能力的吸水性聚合物颗粒的方法，同时通过在聚合反应器中聚合具有至少两个轴（捏合机）的聚合反应器中的单体溶液的聚合而使溶胀凝胶床同时具有高渗透性 轴向平行的方式，随后在高温下挤出和热表面后交联。