Patents by Inventor Byoung-il Kang

Byoung-il Kang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20150084007
    Abstract: The present disclosure relates to a resin composition comprising a copolymer including: (A) 100 parts by weight of units derived from a polycyclic aromatic monomer including a vinyl group, (B) 100 to 600 parts by weight of units derived from a styrene monomer, (C) 100 to 600 parts by weight of units derived from an acid anhydride monomer, and (D) 150 to 1000 parts by weight of units derived from a (meth)acrylate monomer, and an optical film including the resin composition and having reverse wavelength dispersion characteristics.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 26, 2015
    Inventors: Byoung-Il Kang, Chang-Hun Han
  • Patent number: 8951643
    Abstract: The present invention relates to an optical film and method of manufacturing the same. The optical film of the present invention includes an acrylic resin and a core-shell type graft copolymer wherein the core includes a conjugate diene rubber, and the shell includes an acrylic monomer, an aromatic vinyl monomer, and a maleimide monomer.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: February 10, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chang-Hun Han, Jung-A Yoo, Song-Taek Oh
  • Patent number: 8928976
    Abstract: Provided are a resin composition and an optical film formed by using the same, and more particularly, a resin composition including 85 to 95 parts by weight of a matrix copolymer resin including an alkyl(meth)acrylate-based unit, an acryl-based unit containing a benzene ring, and a (meth)acrylic acid unit, and 5 to 15 parts by weight of a polymer resin having a molecular weight range of 150,000 to 1,000,000 and an optical film formed by using the composition. A resin composition according to the present invention may provide a protective film for a polarizing plate having excellent heat resistance and toughness as well as excellent optical properties, and thus, an optical film formed by using the resin composition of the present invention may be used in information electronic devices such as display devices for various applications.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 6, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chang-Hun Han, Dae-Woo Lee, Jae-Bum Seo, Jung-Tae Park, Eun-Jung Choi, Joon-Sik Kim, Beom-Suk Kim, Nam-Jeong Lee, Sang-Min Kwak, Jun-Geun Um, Suk-Il Youn, Joong-Hoon Lee
  • Patent number: 8926872
    Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alkyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: January 6, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Su-Kyung Kim, Byoung-Il Kang, Dae-Woo Lee, Byoung-Kue Chun, Chang-Hun Han, Da-Eun Sung
  • Publication number: 20140239523
    Abstract: The present invention provides an optical film and a retardation film that each include an acryl resin, and 20 to 65 parts by weight of a graft copolymer including a conjugated diene rubber based on 100 parts by weight of the acryl resin, and an electronic device including the same.
    Type: Application
    Filed: May 2, 2014
    Publication date: August 28, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Byoung-Il KANG, Chan-Hong LEE, Chang-Hun HAN
  • Patent number: 8758655
    Abstract: The present invention provides an optical film and a retardation film that each include an acryl resin, and 20 to 65 parts by weight of a graft copolymer including a conjugated diene rubber based on 100 parts by weight of the acryl resin, and an electronic device including the same.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: June 24, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chan-Hong Lee, Chang-Hun Han
  • Patent number: 8623960
    Abstract: Provided are a resin composition including an acryl-based copolymer resin including an alkyl(meth)acrylate-based monomer and an imide-based monomer, additionally copolymerizable with a styrene-based monomer, and a polycarbonate-based resin having a melt index (MI) of 30 g/10 min or more under conditions of a load of 1.2 kg and a temperature of 300° C., a polarizer protective film including the resin composition, and a liquid crystal display including the polarizer protective film. The polarizer protective film according to the present invention has excellent heat resistance, transparency, and optical properties.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: January 7, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Eun-Jung Choi, Byoung-Il Kang, Chang-Hun Han, Jae-Bum Seo
  • Publication number: 20130314785
    Abstract: Provided are a resin composition and an optical film formed by using the same, and more particularly, a resin composition including 85 to 95 parts by weight of a matrix copolymer resin including an alkyl(meth)acrylate-based unit, an acryl-based unit containing a benzene ring, and a (meth)acrylic acid unit, and 5 to 15 parts by weight of a polymer resin having a molecular weight range of 150,000 to 1,000,000 and an optical film formed by using the composition. A resin composition according to the present invention may provide a protective film for a polarizing plate having excellent heat resistance and toughness as well as excellent optical properties, and thus, an optical film formed by using the resin composition of the present invention may be used in information electronic devices such as display devices for various applications.
    Type: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Applicant: LG Chem, Ltd.
    Inventors: Byoung-Il KANG, Chang-Hun HAN, Dae-Woo LEE, Jae-Bum SEO, Jung-Tae PARK, Eun-Jung CHOI, Joon-Sik KIM, Beom-Suk KIM, Nam-Jeong LEE, Sang-Min KWAK, Jun-Geun UM, Suk-Il YOUN, Joong-Hoon LEE
  • Patent number: 8568624
    Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alklyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: October 29, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Su-Kyung Kim, Byoung-Il Kang, Dae-Woo Lee, Byoung-Kue Chun, Chang-Hun Han, Da-Eun Sung
  • Publication number: 20130190451
    Abstract: Provided are a resin composition including an acryl-based copolymer resin including an alkyl(meth)acrylate-based monomer and an imide-based monomer, additionally copolymerizable with a styrene-based monomer, and a polycarbonate-based resin having a melt index (MI) of 30 g/10 min or more under conditions of a load of 1.2 kg and a temperature of 300° C., a polarizer protective film including the resin composition, and a liquid crystal display including the polarizer protective film. The polarizer protective film according to the present invention has excellent heat resistance, transparency, and optical properties.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Inventors: Eun-Jung CHOI, Byoung-Il KANG, Chang-Hun HAN, Jae-Bum SEO
  • Publication number: 20130158201
    Abstract: Provided are a heat resistant, high strength acrylic copolymer and an optical film including the same, and more particularly, an acrylic copolymer polymerized by including (1) an alkyl(meth)acrylate-based monomer excluding a tert-butyl(meth)acrylate-based monomer, (2) a (meth)acrylate-based monomer including an aliphatic ring and/or an aromatic ring, and (3) a tert-butyl(meth)acrylate-based monomer. The acrylic copolymer according to the present invention has excellent heat resistance as well as transparency being maintained. Also, the optical film including a compounding resin including the acrylic copolymer has excellent transparency, heat resistance, processability, adhesiveness, retardation properties, and durability.
    Type: Application
    Filed: June 14, 2011
    Publication date: June 20, 2013
    Applicant: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chang-Hun Han
  • Patent number: 8399567
    Abstract: The present invention relates to an optical film comprising: a blended resin including 1) an acrylic copolymer resin containing an alkyl methacrylate monomer and a (metha) acrylic monomer containing an alicyclic or an aromatic ring, 2) a copolymer resin containing an alkyl methacrylate monomer, an aromatic vinyl monomer, and an acid anhydride monomer, and 3) a resin containing an aromatic or an alicyclic ring in the main chain of a polymer. The present invention also relates to a method for manufacturing the optical film, and a liquid crystal display device comprising the optical film. The optical film according to the present invention is excellent in heat resistance, optical transparency, mechanical strength, durability, and the like.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: March 19, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Kyu Chun, Su-Kyung Kim, Da-Eun Sung, Byoung-Il Kang
  • Patent number: 8309670
    Abstract: The present invention relates to an optical film, comprising a copolymer that comprises (a) a (meth)acrylic monomer, (b) an aromatic vinyl monomer, (c) at least one monomer of an acid anhydride monomer and an unsaturated organic acid monomer, and (d) a vinylcyan monomer, a protection film for a polarizer, a polarizing plate fabricated therefrom, and a display device employing the same.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: November 13, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Nam-Jeong Lee, Beom-Seok Kim, Byoung-Il Kang, Chan-Hong Lee, Chang-Hun Han
  • Publication number: 20100296031
    Abstract: The present invention relates to an optical film, comprising a copolymer that comprises (a) a (meth)acrylic monomer, (b) an aromatic vinyl monomer, (c) at least one monomer of an acid anhydride monomer and an unsaturated organic acid monomer, and (d) a vinylcyan monomer, a protection film for a polarizer, a polarizing plate fabricated therefrom, and a display device employing the same.
    Type: Application
    Filed: December 31, 2008
    Publication date: November 25, 2010
    Inventors: Nam-Jeong Lee, Beom-Seok Kim, Byoung-Il Kang, Chan-Hong Lee, Chang-Hun Han
  • Patent number: 7781523
    Abstract: The present invention relates to styrene-based thermoplastic resin compositions in which 1-10 weight part of a low-gloss additive selected from a group consisting of polyolefin copolymer(C) containing glycidyl methacrylate functional groups, styrene polymer(D) harboring two or more carboxyl functional groups per molecule, and a mixture of them, was added to 100 weight part of basic resin composed of 30-70 weight part of graft copolymer(A) containing rubber modified styrene and 30-70 weight part of copolymer(B) harboring styrene. The thermoplastic resin composition of the present invention has excellent impact strength and satisfactorily low gloss.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: August 24, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-il Kang, Han-jong You, Seong-lyong Kim
  • Publication number: 20100202049
    Abstract: The present invention provides an optical film and a retardation film that each include an acryl resin, and 20 to 65 parts by weight of a graft copolymer including a conjugated diene rubber based on 100 parts by weight of the acryl resin, and an electronic device including the same.
    Type: Application
    Filed: September 17, 2008
    Publication date: August 12, 2010
    Inventors: Byoung-Il Kang, Chan-Hong Lee, Chang-Hun Han
  • Patent number: 7345112
    Abstract: The present invention relates to a thermoplastic resin composition and a preparation method of the same, more precisely, a thermoplastic resin composition containing acrylate-styrene-acrylonitrile (ASA) graft copolymer resin, aromatic polycarbonate resin, aromatic vinyl compound and vinyl cyan compound copolymer resin and styrene-acrylonitrile graft maleic anhydride (SAN-g-MAN) to improve exterior physical properties such as scratch resistance, surface gloss, colorability, weather resistance, etc, and a preparation method of the same.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: March 18, 2008
    Assignee: LG Chem, Ltd.
    Inventors: Han-jong You, Chan-hong Lee, Byoung-il Kang, Seong-lyong Kim
  • Publication number: 20060252875
    Abstract: The present invention relates to styrene-based thermoplastic resin compositions in which 1-10 weight part of a low-gloss additive selected from a group consisting of polyolefin copolymer(C) containing glycidyl methacrylate functional groups, styrene polymer(D) harboring two or more carboxyl functional groups per molecule, and a mixture of them, was added to 100 weight part of basic resin composed of 30-70 weight part of graft copolymer(A) containing rubber modified styrene and 30-70 weight part of copolymer(B) harboring styrene. The thermoplastic resin composition of the present invention has excellent impact strength and satisfactorily low gloss.
    Type: Application
    Filed: August 26, 2005
    Publication date: November 9, 2006
    Applicant: LG CHEM, LTD.
    Inventors: Byoung-il Kang, Han-jong You, Seong-lyong Kim
  • Publication number: 20060106163
    Abstract: The present invention relates to a thermoplastic resin composition and a preparation method of the same, more precisely, a thermoplastic resin composition containing acrylate-styrene-acrylonitrile (ASA) graft copolymer resin, aromatic polycarbonate resin, aromatic vinyl compound and vinyl cyan compound copolymer resin and styrene-acrylonitrile graft maleic anhydride (SAN-g-MAN) to improve exterior physical properties such as scratch resistance, surface gloss, colorability, weather resistance, etc, and a preparation method of the same.
    Type: Application
    Filed: October 20, 2005
    Publication date: May 18, 2006
    Inventors: Han-jong You, Chan-hong Lee, Byoung-il Kang, Seong-lyong Kim
  • Publication number: 20060063887
    Abstract: The present invention relates to a styrene-based thermoplastic resin composition, and more particularly, to a styrene-based thermoplastic composition comprising: (A) 50-90 parts by weight of a rubber-modified styrene-containing graft polymer; (B) 10-50 parts by weight of a modified olefinic resin containing 0.2-1.0 parts, based on 100 parts by weight of the olefinic resin, of a nucleating agent; and (C) 2-10 parts by weight, based on 100 parts by weight of the sum of the components (A) and (B), of a linear styrene-based block copolymer. The composition is excellent in chemical resistance and thermal properties and has a great improvement, particularly in gloss, over the existing styrene-based blend resin.
    Type: Application
    Filed: September 21, 2005
    Publication date: March 23, 2006
    Inventors: Byoung-il Kang, Chan-hong Lee, Han-jong You, Seong-lyong Kim