公开(公告)号：US20190134602A1

公开(公告)日：2019-05-09

申请号：US16092923

申请日：2017-06-15

Applicant: LG CHEM, LTD.

Inventor： Ki Youl YOON ,  Hyo Sook JOO ,  Gi Cheul KIM ,  Hyeon CHOI ,  Ju Eun KIM

IPC: B01J20/26 ,  B01J20/10 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32

Abstract: The present invention relates to a super absorbent polymer having more improved absorbency under pressure and liquid permeability, and a method for producing the same. The super absorbent polymer comprises a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included on the surface cross-linked layer.

公开(公告)号：US20170073478A1

公开(公告)日：2017-03-16

申请号：US15123447

申请日：2015-08-04

Applicant: LG CHEM, LTD.

Inventor： Hyo Sook JOO ,  Ki Youl YOON ,  Gi Cheul KIM ,  Ju Eun KIM ,  Hyeon CHOI ,  Hee jung CHOI ,  Sung Soo PARK ,  Sung Hyun PARK ,  Myung Han LEE

IPC: C08J3/24 ,  C08J3/075 ,  B01J20/28 ,  A61L15/60 ,  B01J20/26 ,  C08F292/00 ,  A61L15/24

CPC classification number: C08J3/245 ,  A61L15/24 ,  A61L15/60 ,  B01J20/267 ,  B01J20/28004 ,  B01J20/28059 ,  B01J20/28061 ,  B01J20/28064 ,  C08F220/06 ,  C08F222/02 ,  C08F292/00 ,  C08J3/075 ,  C08J3/24 ,  C08J2333/02 ,  C08K3/00 ,  C08K5/00 ,  C08F2222/1013 ,  C08F2230/085

Abstract: The present invention relates to a superabsorbent polymer that has more improved gel strength and is improved in both water retention capacity (centrifuge retention capacity, CRC) and absorption ability under pressure (AUP) because of an optimized cross-linked structure of a base resin powder inside a cross-linked surface layer, and a preparation method thereof. The superabsorbent polymer includes a base resin powder including a 1st cross-linked polymer of a water-soluble ethylenic unsaturated monomer having acid groups of which at least a part is neutralized, and a cross-linked surface layer that includes a 2nd cross-linked polymer further cross-linked from the 1st cross-linked polymer and is formed on the base resin powder, wherein an inorganic particle is chemically bonded to the 1st cross-linked polymer by the medium of a cross-linking bond, an oxygen-containing bond (—O—), or a nitrogen-containing bond (—NR—, where R is hydrogen or a C1-C3 alkyl or an amide bond).

Abstract translation: 本发明涉及一种超吸收性聚合物，其具有更高的凝胶强度，并且由于优化的基础树脂粉末的交联结构，在保持能力（离心保留容量，CRC）和压力下的吸收能力（AUP）方面都得到改善 在交联表面层内，及其制备方法。 超吸收性聚合物包括基础树脂粉末，其包含具有至少一部分被中和的酸基的水溶性烯属不饱和单体的第一交联聚合物和包含第二交联聚合物的交联表面层 从第一交联聚合物进一步交联并形成在基础树脂粉末上，其中无机颗粒通过交联键介质，含氧键（第一交联键）与第一交联聚合物化学键合 -O-）或含氮键（-NR-，其中R是氢或C 1 -C 3烷基或酰胺键）。