Patents by Inventor Hwan Seok Park

Hwan Seok Park 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).

  • Patent number: 8557923
    Abstract: Disclosed herein is a thermoplastic resin composition having excellent scratch resistance and a method for preparing the same. The thermoplastic resin composition comprises (A) about 80 to about 95% by weight of a terpolymer of (meth)acrylic acid alkyl ester-aromatic vinyl-cyanide vinyl compound; and (B) about 5 to about 20% by weight of a butadiene rubber.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: October 15, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Young Sub Jin, Hwan Seok Park, Jae Keun Hong, Sung Kwan Kim, Ho Ryong Sun, Byeong Do Lee, Kyung Jong Lee
  • Patent number: 8507609
    Abstract: The present invention provides a thermoplastic resin composition which comprises (A) a (meth)acrylic acid alkyl ester-based polymer forming a network-shaped disperse phase; and (B) an aromatic vinyl-cyanide vinyl based copolymer forming a continuous phase. The thermoplastic resin composition of the present invention can have an excellent low gloss characteristics while maintaining basic physical properties of a weather resistance, impact strength, thermal resistance, and delamination characteristics.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: August 13, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Young Sub Jin, So Young Kwon, Sung Kwan Kim, Hwan Seok Park, Jae Keun Hong, Byeong Do Lee, Chul In Lim
  • Patent number: 8378026
    Abstract: One aspect of the invention relates to a transparent rubber-modified styrenic resin composition. The resin composition comprises about 5 to about 30 parts by weight of a styrene-butadiene rubbery copolymer; and about 0 to about 15 parts by weight of a matrix resin comprising about 20 to about 40 parts by weight of styrenic monomer, about 30 to about 60 parts by weight of unsaturated carboxylic acid alkyl ester monomer and about 0 to about 15 parts by weight of vinyl cyanide monomer; wherein the difference between the refractive index of the rubbery copolymer and the matrix resin is about 0.005 or less and the transparent rubber-modified styrenic resin composition has a haze of about 5% or less as measured by a Nippon Denshoku Haze meter using a 3 mm thick test sample.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: February 19, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Byeong Do Lee, Young Sub Jin, Hwan Seok Park, Jae Keun Hong
  • Patent number: 8362143
    Abstract: Disclosed herein is a non-glossy rubber modified aromatic vinyl-vinyl cyanide copolymer and a method for continuously preparing the same. The copolymer comprises about 80 to about 93% by weight of an aromatic vinyl-vinyl cyanide copolymer grafted onto about 7 to about 20% by weight of a diene-based rubber, and a dispersed phase of the copolymer has an average rubber particle diameter of about 6 to about 20 ?m and a span of about 1.2 to about 2.8.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: January 29, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Hwan Seok Park, Young Sub Jin, Jae Keun Hong, Sung Kwan Kim, Byeong Do Lee, Ho Ryong Sun, Seung Dae Lee
  • Publication number: 20120302663
    Abstract: A polycarbonate resin composition includes about 100 parts by weight of a base resin including about 45 to about 86 parts by weight of a polycarbonate resin (A), about 10 to about 45 parts by weight of a polysiloxane-polycarbonate copolymer (B) and about 4 to about 10 parts by weight of an aromatic vinyl graft copolymer (C), about 0.03 to about 5 parts by weight of a sulfonate flame retardant (D) based on about 100 parts by weight of the base resin, and about 1 to about 10 parts by weight of a polycaprolactone polymer (E) based on about 100 parts by weight of the base resin.
    Type: Application
    Filed: September 30, 2011
    Publication date: November 29, 2012
    Applicant: Cheil Industries Inc.
    Inventors: Hwan Seok PARK, Seung Shik SHIN, Min Jung KANG, Jong Tae YOON
  • Patent number: 8232349
    Abstract: Disclosed herein is a transparent thermoplastic resin comprising a rubber phase including an aromatic rubbery block copolymer resin, and a resin phase including a terpolymer comprising an aromatic vinyl compound, a vinyl cyanide compound and an unsaturated alkyl ester compound, wherein the rubber phase and the resin phase have a co-continuous phase structure.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: July 31, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Jae Keun Hong, Byeong Do Lee, Young Sub Jin, Hwan Seok Park, Ho Ryong Sun
  • Patent number: 8232342
    Abstract: One aspect of the invention relates to a transparent ABS resin composition having excellent impact resistance and flowability, which comprises about 10 to about 50 parts by weight of a rubber/(meth)acrylate-aromatic vinyl-unsaturated nitrile graft copolymer; about 50 to about 90 parts by weight of a thermoplastic resin matrix; and about 0.2 to about 0.5 parts by weight of a fluidizer, per 100 parts by weight of a base resin comprising the rubber/(meth)acrylate-aromatic vinyl-unsaturated nitrile graft copolymer and the thermoplastic resin matrix.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: July 31, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Young Sub Jin, Jae Keun Hong, Hwan Seok Park, Byeong Do Lee
  • Patent number: 8222344
    Abstract: A weather resistant thermoplastic resin having excellent low gloss characteristics according to the present invention comprises a (meth)acrylic acid alkyl ester-based polymer (A) and an aromatic vinyl-cyanide vinyl based copolymer (B), wherein the (meth)acrylic acid alkyl ester-based polymer (A) forms a network-shaped disperse phase, and the aromatic vinyl-cyanide vinyl based copolymer (B) forms a continuous phase. The thermoplastic resin has excellent low gloss characteristics as well as superior weatherability, impact resistance, thermal resistance, delamination characteristics, and the like.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: July 17, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Young Sub Jin, Sung Kwan Kim, Hwan Seok Park, Jae Keun Hong, Byeong Do Lee, Ho Ryong Sun, Bong Sil Jang, Chul In Lim
  • Publication number: 20120172504
    Abstract: A thermoplastic resin composition includes a polycarbonate resin/impact modifier system, a polystyrene resin having a predetermined molecular weight, and a phosphorus flame retardant. The impact modifier includes a particular rubber particle size and is formed of particular monomers. The composition can exhibit improved flame retardancy, impact resistance, fluidity, and appearance.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 5, 2012
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Kyuong Sik CHIN, Seung Shik SHIN, Yun Ku NAM, Hwan Seok PARK
  • Publication number: 20120165460
    Abstract: The present invention discloses a polycarbonate resin composition which includes a polycarbonate resin (A), a polycarbonate-polysiloxane copolymer (B), and a siloxane copolyester (C), wherein the siloxane copolyester (C) is present in an amount of about 0.1 to about 6 wt % based on 100 wt % of a base resin including the polycarbonate resin (A), polycarbonate-polysiloxane copolymer (B), and siloxane copolyester (C). The composition can have excellent mold release properties and appearance.
    Type: Application
    Filed: September 22, 2011
    Publication date: June 28, 2012
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Hwan Seok PARK, Jin Seong LEE, Jong Tae YOON, Yun Ku NAM, Min Jung KANG, Seung Shik SHIN, Woo Jung KIM, Kyuong Sik CHIN
  • Patent number: 8097680
    Abstract: A thermoplastic resin of the present invention is prepared by copolymerizing conjugated diene rubber (A), rubbery aromatic copolymer (B), heat resistant aromatic vinyl compound (C), aromatic vinyl compound (D), unsaturated nitrile compound (E) and cross linking agent (F) and can have excellent heat resistance, impact strength, and low gloss.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: January 17, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Jae Keun Hong, Byeong Do Lee, Ho Ryong Sun, Young Sub Jin, Hwan Seok Park, Sung Kwan Kim, Jae Woo Park
  • Publication number: 20110160396
    Abstract: The present invention provides a thermoplastic resin composition which comprises (A) a (meth)acrylic acid alkyl ester-based polymer forming a network-shaped disperse phase; and (B) an aromatic vinyl-cyanide vinyl based copolymer forming a continuous phase. The thermoplastic resin composition of the present invention can have an excellent low gloss characteristics while maintaining basic physical properties of a weather resistance, impact strength, thermal resistance, and delamination characteristics.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 30, 2011
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Sub Jin, So Young Kwon, Sung Kwan Kim, Hwan Seok Park, Jae Keun Hong, Byeong Do Lee, Chul In Lim
  • Publication number: 20100331475
    Abstract: Disclosed herein is a low gloss thermoplastic resin composition with a soft touch surface comprising (A) about 10 to about 80% by weight of a soft rubbery aromatic vinyl copolymer resin which comprises rubber particles with a graft ratio of about 40 to about 90% and an average particle diameter of about 6 to about 20 ?m as a dispersed phase; (B) about 4 to about 60% by weight of a rubber-modified aromatic vinyl copolymer resin; and (C) about 5 to about 80% by weight of an aromatic vinyl-vinyl cyanide copolymer resin. The molded article molded from the thermoplastic resin composition can have a soft touch surface as well as excellent low gloss and impact strength.
    Type: Application
    Filed: June 30, 2010
    Publication date: December 30, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Jae Keun Hong, Hwan Seok Park, Byeong Do Lee, Young Sub Jin, Ho Ryong Sun, Sung Kwan Kim, Young Don Yoo
  • Patent number: 7812072
    Abstract: A method of preparing a styrene polymer-silica nanocomposite is disclosed. One embodiment of the method includes polymerizing about 100 parts by weight of a monomer mixture including about 50 to about 80% by weight of an aromatic monomer an about 20 to about 50% by weight of a vinyl cyanide monomer with about 0.5 to about 30 parts by weight of a colloidal silica dispersed in a first organic solvent.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: October 12, 2010
    Assignee: Cheil Industries, Inc.
    Inventors: Byeong Do Lee, Young Sub Jin, Hwan Seok Park, Jae Keun Hong, Young Sik Ryu, Il Jin Kim
  • Publication number: 20100168354
    Abstract: A thermoplastic resin of the present invention is prepared by copolymerizing conjugated diene rubber (A), rubbery aromatic copolymer (B), heat resistant aromatic vinyl compound (C), aromatic vinyl compound (D), unsaturated nitrile compound (E) and cross linking agent (F) and can have excellent heat resistance, impact strength, and low gloss.
    Type: Application
    Filed: December 28, 2009
    Publication date: July 1, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Jae Keun HONG, Byeong Do LEE, Ho Ryong SUN, Young Sub JIN, Hwan Seok PARK, Sung Kwan KIM, Jae Woo PARK
  • Publication number: 20100168333
    Abstract: The present invention provides a thermoplastic resin composition that can have excellent heat resistance and impact strength comprising a rubber-modified styrene resin and a copolymer of N-substituted maleimide compound and aromatic vinyl compound.
    Type: Application
    Filed: December 28, 2009
    Publication date: July 1, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Jae Keun HONG, Byeong Do LEE, Ho Ryong SUN, Young Sub JIN, Hwan Seok PARK, Sung Kwan KIM, Sa Chun BAE
  • Publication number: 20100105840
    Abstract: A weather resistant thermoplastic resin having excellent low gloss characteristics according to the present invention comprises a (meth)acrylic acid alkyl ester-based polymer (A) and an aromatic vinyl-cyanide vinyl based copolymer (B), wherein the (meth)acrylic acid alkyl ester-based polymer (A) forms a network-shaped disperse phase, and the aromatic vinyl-cyanide vinyl based copolymer (B) forms a continuous phase. The thermoplastic resin has excellent low gloss characteristics as well as superior weatherability, impact resistance, thermal resistance, delamination characteristics, and the like.
    Type: Application
    Filed: October 26, 2009
    Publication date: April 29, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Sub Jin, Sung Kwan Kim, Hwan Seok Park, Jae Keun Hong, Byeong Do Lee, Ho Ryong Sun, Bong Sil Jang, Chul In Lim
  • Publication number: 20090215960
    Abstract: A method for preparing a thermoplastic resin is disclosed, which includes consecutively polymerizing a mixed raw material comprising a (meth)acrylic acid alkyl ester, an aromatic vinyl monomer and a unsaturated nitrile monomer in a plurality of serially connected reactors while controlling polymerization conversion in each reactor to be about 40% or less. The invention also relates to a transparent ABS resin composition which employs the thermoplastic resin as a matrix resin.
    Type: Application
    Filed: April 30, 2009
    Publication date: August 27, 2009
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Sub JIN, Byeong Do LEE, Jae Keun HONG, Hwan Seok PARK
  • Publication number: 20090171020
    Abstract: Disclosed herein is a non-glossy rubber modified aromatic vinyl-vinyl cyanide copolymer and a method for continuously preparing the same. The copolymer comprises about 80 to about 93% by weight of an aromatic vinyl-vinyl cyanide copolymer grafted onto about 7 to about 20% by weight of a diene-based rubber, and a dispersed phase of the copolymer has an average rubber particle diameter of about 6 to about 20 ?m and a span of about 1.2 to about 2.8.
    Type: Application
    Filed: December 29, 2008
    Publication date: July 2, 2009
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Hwan Seok Park, Young Sub Jin, Jae Keun Hong, Sung Kwan Kim, Byeong Do Lee, Ho Ryong Sun, Seung Dae Lee
  • Publication number: 20090171028
    Abstract: Disclosed herein is a thermoplastic resin composition having excellent scratch resistance and a method for preparing the same. The thermoplastic resin composition comprises (A) about 80 to about 95% by weight of a terpolymer of (meth)acrylic acid alkyl ester-aromatic vinyl-cyanide vinyl compound; and (B) about 5 to about 20% by weight of a butadiene rubber.
    Type: Application
    Filed: December 29, 2008
    Publication date: July 2, 2009
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Sub Jin, Hwan Seok Park, Jae Keun Hong, Sung Kwan Kim, Ho Ryong Sun, Byeong Do Lee, Kyung Jong Lee