公开(公告)号：US10047179B2

公开(公告)日：2018-08-14

申请号：US14909924

申请日：2015-04-08

Applicant: LG CHEM, LTD.

Inventor： Byoung Il Kang ,  Chang Hun Han ,  Jae Bum Seo ,  Eun Jung Choi ,  Da Eun Sung

IPC: C08F212/10 ,  C08L25/14 ,  C08F212/12 ,  C08L25/16 ,  C08L51/04 ,  C08L55/02

Abstract: Provided is a styrene resin composition including α-methyl styrene, acrylonitrile and t-butyl methacrylate, and having an improved conversion rate while maintaining excellent mechanical and chemical properties, a styrene resin composition including the same, and a styrene resin molded product manufactured therefrom. Accordingly, the heat-resistant styrene copolymer is effective in improving a conversion rate without deformation and mechanical and chemical property decline of the material itself, and as a result, commercialization may be readily accomplished due to enhanced productivity. In addition, the styrene resin molded product manufactured from the styrene resin composition according to the present invention includes the heat-resistant styrene copolymer as a matrix copolymer, and therefore, has excellent impact strength, tensile strength, tensile elongation and flowability while having high heat resistance.

公开(公告)号：US09856373B2

公开(公告)日：2018-01-02

申请号：US14893030

申请日：2014-06-25

Applicant: LG CHEM, LTD.

Inventor： Byoung Il Kang ,  Chang Hun Han ,  Jae Bum Seo ,  Da Eun Sung ,  Dae Woo Lee ,  Eun Jung Choi

IPC: C08L33/12 ,  C08L53/02 ,  C08F220/14

CPC classification number: C08L53/02 ,  C08F220/14 ,  C08L33/12 ,  C08F2220/1841

Abstract: Disclosed is a (meth)acrylate-based resin composition comprising a poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer comprising phenyl(meth)acrylate having excellent surface hardness and a high refractive index, as a base resin and a (conjugated diene (meth)acrylate) graft copolymer having excellent impact absorption efficiency, the (meth)acrylate-based resin composition providing excellent transparency by exhibiting excellent impact resistance even using a small amount of impact modifier. The (meth)acrylate-based resin composition having excellent impact resistance and transparency comprises 1 to 29 wt % of the (conjugated diene-(meth)acrylate) graft copolymer and 71 to 99 wt % of the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer.

公开(公告)号：US11891487B2

公开(公告)日：2024-02-06

申请号：US17051859

申请日：2019-09-24

Applicant: LG Chem, Ltd.

Inventor： Tae Young Won ,  Hyemin Lee ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

IPC: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14

CPC classification number: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14 ,  C08J2323/06 ,  C08L2312/00

Abstract: The present disclosure relates to a preparation method of a super absorbent polymer having excellent basic absorbency and liquid permeability at the same time by optimizing the degree of cross-linking of a base resin powder and a surface cross-linked layer, and a super absorbent polymer prepared therefrom. The preparation method of a super absorbent polymer includes: forming a hydrogel polymer by cross-linking and polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer having a degree of neutralization of less than 72 mol % and an internal cross-linking agent; drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; forming a surface cross-linked layer by further cross-linking a surface of the base resin powder in the presence of a surface cross-linking agent; and further neutralizing the base resin powder by treating the base resin powder with a basic solution during or after forming a surface cross-linked layer.

公开(公告)号：US20220145018A1

公开(公告)日：2022-05-12

申请号：US17598609

申请日：2020-09-08

Applicant: LG Chem, Ltd.

Inventor： Junwye Lee ,  Tae Young Won ,  Jungmin Sohn ,  Hyemin Lee ,  Kwangin Shin ,  Minsu Kim ,  Chang Hun Han

IPC: C08J3/24 ,  C08F20/06 ,  C08J3/12

Abstract: According to the method for preparation of a super absorbent polymer according to of the present disclosure, fine particles present in the prepared super absorbent polymer are removed, thereby solving a dispersion problem of the fine particles and a problem of reduction in the physical properties of the super absorbent polymer.

公开(公告)号：US20210309777A1

公开(公告)日：2021-10-07

申请号：US17271414

申请日：2019-12-20

Applicant: LG Chem, Ltd.

Inventor： Hyemin Lee ,  Tae Young Won ,  Jungmin Sohn ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

IPC: C08F220/06 ,  C08J3/24 ,  C08J3/12 ,  C08J3/075

Abstract: The present disclosure relates to a super absorbent polymer and a preparation method of the same, which not only has excellent basic absorption performance, but also exhibits an improved absorption rate, and the like. The super absorbent polymer includes a base resin powder containing a first cross-linked polymer of a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups; and a surface cross-linked layer containing a second cross-linked polymer in which the first cross-linked polymer is additionally cross-linked by a surface cross-linking agent on the base resin powder, wherein the super absorbent polymer contains less than 9.9% by number of super absorbent polymer particles having an aspect ratio, which is defined as shortest diameter/longest diameter of each super absorbent polymer particle, of less than 0.5, a vortex time is 5 to 55 seconds by a vortex method, and a surface tension is 50 to 80 mN/m.

公开(公告)号：US20210230376A1

公开(公告)日：2021-07-29

申请号：US17051859

申请日：2019-09-24

Applicant: LG Chem, Ltd.

Inventor： Tae Young Won ,  Hyemin Lee ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

IPC: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14

Abstract: The present disclosure relates to a preparation method of a super absorbent polymer having excellent basic absorbency and liquid permeability at the same time by optimizing the degree of cross-linking of a base resin powder and a surface cross-linked layer, and a super absorbent polymer prepared therefrom. The preparation method of a super absorbent polymer includes forming a hydrogel polymer by cross-linking and polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer having a degree of neutralization of less than 72 mol % and an internal cross-linking agent; drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; forming a surface cross-linked layer by further cross-linking a surface of the base resin powder in the presence of a surface cross-linking agent and further neutralizing the base resin powder by treating the base resin powder with a basic solution during or after forming a surface cross-linked layer.

公开(公告)号：US11034802B2

公开(公告)日：2021-06-15

申请号：US16341292

申请日：2018-08-07

Applicant: LG Chem, Ltd.

Inventor： Taebin Ahn ,  Dong Hyun Kim ,  Chang Hun Han

IPC: C08J3/12 ,  A61L15/24 ,  A61L15/60 ,  C08J3/24 ,  C08K3/22 ,  C08K3/36 ,  C08K9/06

Abstract: The superabsorbent polymer has absorption under pressure/under no pressure, permeability, and absorption speed that are suitable for the application in thin hygienic goods, and simultaneously, inhibits the generation of dust in the preparation process of hygienic goods and does not exhibit blocking in the preparation process of the superabsorbent polymer.

公开(公告)号：US10894844B2

公开(公告)日：2021-01-19

申请号：US16329980

申请日：2018-06-26

Applicant: LG Chem, Ltd.

Inventor： Yong Hun Lee ,  Tae Young Won ,  Jun Wye Lee ,  Kwangin Shin ,  Chang Hun Han

IPC: C08J3/24 ,  C08J3/075 ,  C08J3/12 ,  C08F20/14 ,  C08K3/18 ,  C08K3/22 ,  C08K3/28 ,  C08K5/092 ,  C08K5/109 ,  C08K5/103 ,  C08K5/00 ,  C08K3/00 ,  C08K3/011

Abstract: Provided are a superabsorbent polymer having a high bulk density value and showing a reduction in unpleasant odors which may be caused by various additives included in a preparation process while basically maintaining excellent absorption performance and absorption rate, and a preparation method thereof.

公开(公告)号：US10717859B2

公开(公告)日：2020-07-21

申请号：US15815520

申请日：2017-11-16

Applicant: LG CHEM, LTD.

Inventor： Gyu Sun Kim ,  Chang Hun Han ,  Dae Woo Lee ,  Jae Bum Seo ,  Jung Tae Park ,  Eun Jung Choi ,  Byoung Il Kang ,  Da Eun Sung

IPC: C08F2/02 ,  C08F212/12 ,  C08F220/44 ,  C08F222/10 ,  C08L25/16 ,  C08L55/02 ,  C08L25/12 ,  C08F279/04 ,  C08K5/315 ,  C08F285/00 ,  C08K5/14

Abstract: The present invention relates to a composition for preparing a SAN copolymer, a SAN copolymer, a preparation method therefor, a heat-resistant ABS resin blend comprising the same, and heat-resistant ABS pellets. Specifically, the present invention provides a composition for preparing a SAN copolymer, the composition comprising a monomer mixture, and ethylene glycol dimethacrylate as a chain extender, wherein the monomer mixture comprises 60 to 75 wt % of an α-methylstyrene monomer and 25 to 40 wt % of an acrylonitrile-based monomer based on the total weight of the monomer mixture; and the ethylene glycol dimethacrylate is contained in an amount of 0.001 to 0.15 parts by weight based on 100 parts by weight of the monomer mixture.

公开(公告)号：US20200216623A1

公开(公告)日：2020-07-09

申请号：US16341292

申请日：2018-08-07

Applicant: LG Chem, Ltd.

Inventor： Taebin Ahn ,  Dong Hyun Kim ,  Chang Hun Han

IPC: C08J3/12 ,  C08J3/24 ,  C08K3/22 ,  C08K3/36 ,  C08K9/06 ,  A61L15/24 ,  A61L15/60

Abstract: The superabsorbent polymer has absorption under pressure/under no pressure, permeability, and absorption speed that are suitable for the application in thin hygienic goods, and simultaneously, inhibits the generation of dust in the preparation process of hygienic goods and does not exhibit blocking in the preparation process of the superabsorbent polymer.