公开(公告)号：US20230057580A1

公开(公告)日：2023-02-23

申请号：US17788891

申请日：2021-07-09

Applicant: LG CHEM, LTD.

Inventor： Mincheol JU ,  Hyung Sub LEE ,  Dae Woo LEE ,  Jae Bum SEO ,  Minseung SHIN ,  Sungwon HONG ,  Insoo KIM

IPC: C08F212/08 ,  C08F212/12 ,  C08F220/14 ,  C08F220/44 ,  C08F2/20 ,  C08F265/04

Abstract: The present disclosure relates to a styrene copolymer, a thermoplastic resin composition, and methods of preparing the styrene copolymer and the thermoplastic resin composition. More particularly, the present disclosure relates to a styrene copolymer having a low residual oligomer content and excellent transparency due to uniform polymerization of components to be added; and a thermoplastic resin composition including the styrene copolymer and an acrylic rubber graft copolymer and being suitable for a molded article having excellent heat resistance, scratch resistance, and surface appearance.

公开(公告)号：US20220073724A1

公开(公告)日：2022-03-10

申请号：US17417360

申请日：2020-09-24

Applicant: LG CHEM, LTD.

Inventor： Gyu Sun KIM ,  Dae Woo LEE ,  Jae Bum SEO ,  Jung Tae PARK ,  Seongjae SHIN ,  Jiuk JANG

IPC: C08L51/00 ,  C08F212/08 ,  C08F220/14 ,  C08F220/44 ,  C08F222/40

Abstract: A thermoplastic resin composition of the present invention includes 55 to 70% by weight of a non-grafted copolymer (A) containing 65 to 83% by weight of a (meth)acrylic acid alkyl ester compound, 2 to 12% by weight of an N-substituted maleimide compound, 1 to 6% by weight of a vinyl cyanide compound, and 7 to 17% by weight of an aromatic vinyl compound; 20 to 42% by weight of an acrylate-based rubber-aromatic vinyl compound-vinyl cyanide compound graft copolymer (B) containing acrylate-based rubber having an average particle diameter of 50 to 200 nm; and 1 to 15% by weight of an acrylate-based rubber-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C) containing acrylate-based rubber having an average particle diameter of 300 to 600 nm. Within this range, a thermoplastic resin composition having excellent weather resistance, heat resistance, scratch resistance, and colorability.

公开(公告)号：US20210230333A1

公开(公告)日：2021-07-29

申请号：US17054459

申请日：2019-10-29

Applicant: LG CHEM, LTD.

Inventor： Joon Hwi JO ,  Seong Lyong KIM ,  Dae Woo LEE ,  Jae Bum SEO

IPC: C08F265/06 ,  C08F267/08 ,  C08F257/02 ,  C08L51/00

Abstract: Provided is a thermoplastic resin composition which includes: a first graft copolymer including a C4 to C10 alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit, and a vinyl cyan-based monomer unit; a second graft copolymer including a C4 to C10 alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit, and a vinyl cyan-based monomer unit; and a first styrene-based copolymer being a copolymer of a monomer mixture including a C1 to C3 alkyl-substituted styrene-based monomer, a vinyl cyan-based monomer, and a C1 to C3 alkyl (meth)acrylate-based monomer, wherein the first graft copolymer and the second graft copolymer have cores having mutually different average particle diameters. The thermoplastic resin composition is excellent in colorability, weather resistance, tensile strength, flexural strength, and impact strength.

公开(公告)号：US20180201707A1

公开(公告)日：2018-07-19

申请号：US15739674

申请日：2016-11-02

Applicant: LG CHEM, LTD.

Inventor： Jae Bum SEO ,  Chang Hun HAN ,  Dae Woo LEE ,  Jung Tae PARK ,  Gyu Sun KIM

IPC: C08F212/10 ,  C08F6/10

CPC classification number: C08F212/10 ,  C08F2/04 ,  C08F2/38 ,  C08F2/44 ,  C08F6/10 ,  C08F2800/20

Abstract: The present invention relates to a method of preparing a styrene-based resin having a low oligomer content and a styrene-based resin prepared thereby. The preparation method according to the present invention may prepare a styrene-based resin having a reduced oligomer content by using a polymerization initiator having a 1 hour half-life temperature, which is 5° C. to 25° C. lower than a temperature during polymerization, and controlling devolatilization conditions.

公开(公告)号：US20180142049A1

公开(公告)日：2018-05-24

申请号：US15574806

申请日：2017-01-31

Applicant: LG CHEM, LTD.

Inventor： Dae Woo LEE ,  Chang Hun HAN ,  Jae Bum SEO ,  Jung Tae PARK ,  Gyu Sun KIM

IPC: C08F212/10 ,  C08F214/10 ,  C08F297/04 ,  C08F6/10 ,  C08F2/38 ,  C08F2/44 ,  C08L55/02 ,  C08K5/14

CPC classification number: C08F212/10 ,  C08F2/06 ,  C08F2/38 ,  C08F2/44 ,  C08F4/36 ,  C08F6/003 ,  C08F6/10 ,  C08F214/10 ,  C08F297/04 ,  C08K5/14 ,  C08L25/12 ,  C08L55/02

Abstract: The present invention provides a method of preparing an aromatic vinyl-unsaturated nitrile-based copolymer in which, when an aromatic vinyl-unsaturated nitrile-based copolymer in which a content of a structural unit derived from unsaturated nitrile monomers in the copolymer is in the range of 22 to 30 wt % is prepared, oligomer content and unreacted monomer content are decreased, resulting in excellent heat resistance, significantly improved surface quality, and particularly, reduced generation of residue on a product surface when used in a closed high temperature environment and reduced occurrence of mold deposits during injection molding, and an aromatic vinyl-unsaturated nitrile-based copolymer prepared using the method.

公开(公告)号：US20160115309A1

公开(公告)日：2016-04-28

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: C08L33/08 ,  C08L53/02 ,  C08L51/04

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.

Abstract translation: 公开了一种（甲基）丙烯酸酯系树脂组合物，其包含聚（甲基）丙烯酸烷基酯（甲基）丙烯酸苯酯（甲基）丙烯酸烷基酯）共聚物，其包含具有优异的表面硬度和高折射率的（甲基）丙烯酸苯酯作为基础树脂， （甲基）丙烯酸酯系树脂组合物，即使使用少量的抗冲击改性剂也具有优异的耐冲击性，提供优异的透明性的（共轭二烯（甲基）丙烯酸酯）接枝共聚物。 具有优异的耐冲击性和透明性的（甲基）丙烯酸酯系树脂组合物包含1〜29重量％的（共轭二烯 - （甲基）丙烯酸酯）接枝共聚物，71〜99重量％的（甲基）丙烯酸烷基酯 - 苯基（甲基）丙烯酸酯）共聚物。

公开(公告)号：US20160108224A1

公开(公告)日：2016-04-21

申请号：US14764555

申请日：2014-02-27

Applicant: LG CHEM, LTD.

Inventor： Jae Bum SEO ,  Chang Hun HAN ,  Dae Woo LEE ,  Jung Tae PARK ,  Eun Jung CHOI ,  Byoung IL KANG ,  Da Eun SUNG ,  Gyu Sun KIM

IPC: C08L25/12 ,  C08F212/10

CPC classification number: C08L25/12 ,  C08F2/02 ,  C08F212/10 ,  C08L25/16 ,  C08L55/02 ,  C08F4/36 ,  C08F212/12 ,  C08F220/44 ,  C08F212/08

Abstract: Disclosed are a heat-resistant SAN resin, a method of preparing the same, and a heat-resistant ABS resin composition comprising the same. More particularly, a heat-resistant SAN resin comprising 60 to 75 wt % of α-methylstyrene, 25 to 35 wt % of a vinyl cyan compound, and 0 to 10 wt % of an aromatic vinyl compound (except for α-methylstyrene), the heat-resistant SAN resin having a degree of branching of 0.40 to 0.60, a molecular weight of 90,000 to 150,000 g/mol, and a glass transition temperature (Tg) of 124 to 140° C., a method of preparing the same, and a heat-resistant ABS resin composition comprising the same are disclosed.

Abstract translation: 公开了耐热性SAN树脂及其制备方法，以及含有该树脂的耐热性ABS树脂组合物。 更具体地说，包含60至75重量％的α-甲基苯乙烯，25至35重量％的乙烯基青色化合物和0至10重量％的芳族乙烯基化合物（α-甲基苯乙烯除外）的耐热SAN树脂， 其支化度为0.40〜0.60，分子量为90,000〜150,000g / mol，玻璃化转变温度（Tg）为124〜140℃的耐热SAN树脂，其制备方法， 并公开了包含该ABS树脂组合物的耐热ABS树脂组合物。

公开(公告)号：US20240002568A1

公开(公告)日：2024-01-04

申请号：US18035450

申请日：2022-08-17

Applicant: LG CHEM, LTD.

Inventor： Jae Bum SEO ,  Dae Woo LEE ,  Jung Tae PARK ,  Jung Rae LEE ,  Ji Uk JANG ,  Kyeong Soo SHIN

IPC: C08F222/30 ,  C08F2/00

CPC classification number: C08F222/30 ,  C08F2/001

Abstract: The present disclosure relates to a method of preparing a polymer including preparing a first polymer mixture by polymerizing while continuously adding a monomer mixture comprising a (meth)acrylate-based monomer, a vinyl aromatic monomer, and a first vinyl cyanide-based monomer to a first reactor; and preparing a second polymer mixture by polymerizing while continuously adding a second vinyl cyanide-based monomer and the first polymer mixture to a second reactor, wherein a starting time of the continuous addition of the second vinyl cyanide-based monomer and the first polymer mixture is a time when a polymerization conversion rate is 40.0 to 55.0%, and a weight ratio of the first vinyl cyanide-based monomer and the second vinyl cyanide-based monomer is 10:90 to 35:65.

公开(公告)号：US20230020924A1

公开(公告)日：2023-01-19

申请号：US17783682

申请日：2021-11-25

Applicant: LG CHEM, LTD.

Inventor： Sung Won HONG ,  Hyung Sub LEE ,  Dae Woo LEE ,  Min Cheol JU ,  Seong Jae SHIN ,  Min Seung SHIN ,  In Soo KIM

IPC: C08F212/12 ,  C08F212/10 ,  C08F2/18 ,  C08F212/08 ,  C08F220/44

Abstract: The present invention relates to a method of preparing a polymer, which includes: adding a first reaction solution including an aqueous solvent and a monomer mixture including an alkyl-substituted aromatic vinyl-based monomer, an alkyl-unsubstituted aromatic vinyl-based monomer, and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization by continuously adding an alkyl-substituted aromatic vinyl-based monomer to the reactor, wherein the first reaction solution satisfies Expression 1 (see the description of the invention).

公开(公告)号：US20220089854A1

公开(公告)日：2022-03-24

申请号：US17419494

申请日：2020-09-24

Applicant: LG CHEM, LTD.

Inventor： Jung Tae PARK ,  Dae Woo LEE ,  Jae Bum SEO ,  Gyu Sun KIM ,  Jiuk JANG

IPC: C08L33/08

Abstract: A thermoplastic resin composition of the present invention includes 65 to 85% by weight of a heat-resistant copolymer (A) containing 76 to 92% by weight of a (meth)acrylic acid alkyl ester compound, 1 to 8% by weight of an N-substituted maleimide compound, and 5 to 16% by weight of an aromatic vinyl compound; 10 to 30% by weight of an acrylate-based rubber-aromatic vinyl compound-vinyl cyanide compound graft copolymer (B) containing acrylate-based rubber having an average particle diameter of 50 to 200 nm; and 1 to 15% by weight of an acrylate-based rubber-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C) containing acrylate-based rubber having an average particle diameter of 300 to 600 nm. In this case, in the heat-resistant copolymer (A), the weight ratio of the aromatic vinyl compound to the N-substituted maleimide compound is 1.5 to 8.