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.

公开(公告)号：US20210163652A1

公开(公告)日：2021-06-03

申请号：US17047657

申请日：2019-11-08

Applicant: LG CHEM, LTD.

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

IPC: C08F279/04 ,  C08F226/06 ,  C08F2/02 ,  C08L55/02

Abstract: Provided is a method of preparing a graft copolymer, which includes: preparing a liquid maleimide-based monomer; preparing a reaction solution including a diene-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer; and adding the liquid maleimide-based monomer and the reaction solution to a reactor and carrying out polymerization. According to the preparation method of the present invention, the amount of the maleimide-based monomer involved in the polymerization can be increased, and the color characteristics, glass transition temperature, and softening temperature of the graft copolymer are improved.

公开(公告)号：US20180072881A1

公开(公告)日：2018-03-15

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: C08L25/12 ,  C08F220/44 ,  C08L55/02 ,  C08F285/00 ,  C08F2/02 ,  C08K5/14 ,  C08K5/315

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：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：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：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：US20220135725A1

公开(公告)日：2022-05-05

申请号：US17428942

申请日：2020-10-06

Applicant: LG CHEM, LTD.

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

IPC: C08F279/04 ,  B29B9/06

Abstract: The present invention relates to a method for producing a diene-based graft copolymer resin, and a diene-based graft copolymer resin produced therefrom, the method including: mixing an aromatic vinyl-based monomer, a diene-based rubber polymer, and a polymerization initiator to prepare a first reactant; mixing a vinyl cyan-based monomer and an antioxidant to prepare a second reactant; adding and polymerizing the first reactant and the second reactant into a polymerization reactor to prepare a polymer; and removing unreacted monomers in a devolatilization tank.

公开(公告)号：US20200040115A1

公开(公告)日：2020-02-06

申请号：US16339705

申请日：2018-07-26

Applicant: LG CHEM, LTD.

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

IPC: C08F212/08 ,  C08F220/18 ,  C08F220/44 ,  C08F222/40 ,  C08F2/02 ,  C08F6/10 ,  C08F6/28

Abstract: The present invention relates to a copolymer including 20 to 65 wt % of units derived from an alkyl styrene-based monomer; 10 to 40 wt % of units derived from a (meth)acrylate-based monomer; and 20 to 40 wt % of units derived from vinyl cyan-based monomer, based on the total weight of the copolymer, wherein the residual monomer content is 780 ppm or less, and a method for preparing the same.

公开(公告)号：US20170275452A1

公开(公告)日：2017-09-28

申请号：US15508472

申请日：2016-06-17

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: C08L55/02 ,  C08F2/06 ,  C08F2/02 ,  C08F279/02 ,  C08L25/10

CPC classification number: C08L55/02 ,  C08F2/001 ,  C08F2/02 ,  C08F2/06 ,  C08F279/02 ,  C08L25/10 ,  C08F212/08 ,  C08F220/44 ,  C08F222/40

Abstract: The present invention relates to method for preparing a modified acrylonitrile-butadiene-styrene resin having excellent matteness, impact resistance, and heat resistance, as well as having a low total volatile organic compounds content, and to a modified acrylonitrile-butadiene-styrene resin prepared thereby.