Patents by Inventor Sam-Joo Yang

Sam-Joo Yang 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: 7691924
    Abstract: The present invention relates to a flame retardant polycarbonate thermoplastic resin composition that comprises a polycarbonate resin, a rubber modified vinyl-grafted copolymer, a phosphorous mixture of a cyclic phosphazene oligomer compound and a phosphate ester morpholide compound or a phosphoric acid ester as a flame retardant, and, optionally, a fluorinated polyolefin resin, which has good flame retardancy, heat resistance, mechanical strength, impact strength, heat stability, processability, and appearance.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: April 6, 2010
    Assignee: Cheil Industries
    Inventors: Jong-Cheol Lim, Sang Hyun Hong, Kyung-Hoon Seo, Sam-Joo Yang
  • Patent number: 7138445
    Abstract: The present invention relates to a flame retardant thermoplastic resin composition that contains a phenol resin derivative having good char formability, regardless of the base resin. A flame retardant thermoplastic resin composition according to the present invention comprises (A) 100 parts by weight of a thermoplastic resin as a base resin, (B) about 0.1˜100 parts by weight of a phenol resin derivative, and (C) about 0.1˜50 parts by weight of a phosphoric acid ester morpholide compound or a mixture of phosphoric acid ester morpholide compounds. Another flame retardant thermoplastic resin composition according to the present invention comprises (A) 100 parts by weight of a thermoplastic resin as a base resin, (B) about 0.1˜100 parts by weight of polyphenylene ether, (C) about 0.1˜100 parts by weight of a phenol resin derivative, and (D) about 0.1˜50 parts by weight of a phosphoric acid ester morpholide compound or a mixture of phosphoric acid ester morpholide compounds.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: November 21, 2006
    Assignee: Cheil Industries Inc.
    Inventors: Jae Ho Yang, Sang Hyun Hong, Gyu Chul Lee, Bok Nam Jang, Young Gil Jang, Sung Hee Ahn, Su Hak Bae, Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Patent number: 6900256
    Abstract: The present invention relates to polyphosphate ester morpholides, compositions comprising mixtures thereof and thermoplastic resin compositions containing the polyphosphate ester morpholide composition as a flame retardant. The flame retardant compositions comprise mixtures of polyphosphate ester morpholides which are represented by the following general formula I: in which X is 1 or 2; R1 is a C6-C20 aryl group, an alkyl substituted C6-C20 aryl group or a derivative thereof; R2 is a C6-C30 arylene group, an alkyl substituted C6-C30 arylene group or a derivative thereof; n is the average number of morpholide repeating units, m is the average number of R1 repeating units, and n+m is 1 to 5. In accordance with the present invention, it is possible to provide a flame retardant thermoplastic resin compositions having improved flame retardancy even when small amounts of the flame retardant are used.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: May 31, 2005
    Assignee: Cheil Industries Inc.
    Inventors: Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Publication number: 20040122139
    Abstract: The present invention relates to a flame retardant thermoplastic resin composition that contains a phenol resin derivative having good char formability, regardless of the base resin. A flame retardant thermoplastic resin composition according to the present invention comprises (A) 100 parts by weight of a thermoplastic resin as a base resin, (B) about 0.1˜100 parts by weight of a phenol resin derivative, and (C) about 0.1˜50 parts by weight of a phosphoric acid ester morpholide compound or a mixture of phosphoric acid ester morpholide compounds. Another flame retardant thermoplastic resin composition according to the present invention comprises (A) 100 parts by weight of a thermoplastic resin as a base resin, (B) about 0.1˜100 parts by weight of polyphenylene ether, (C) about 0.1˜100 parts by weight of a phenol resin derivative, and (D) about 0.1˜50 parts by weight of a phosphoric acid ester morpholide compound or a mixture of phosphoric acid ester morpholide compounds.
    Type: Application
    Filed: December 8, 2003
    Publication date: June 24, 2004
    Applicant: Cheil Industries Inc.
    Inventors: Jae Ho Yang, Sang Hyun Hong, Gyu Chul Lee, Bok Nam Jang, Young Gil Jang, Sung Hee Ahn, Su Hak Bae, Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Patent number: 6576161
    Abstract: The present invention relates to polyphosphate ester morpholides, compositions comprising mixtures thereof and thermoplastic resin compositions containing the polyphosphate ester morpholide composition as a flame retardant. The flame retardant compositions comprise mixtures of polyphosphate ester morpholides which are represented by the following general formula I: in which X is 1 or 2; R1 is a C6-C20 aryl group, an alkyl substituted C6-C20 aryl group or a derivative thereof; R2 is a C6-C30 arylene group, an alkyl substituted C6-C30 arylene group or a derivative thereof; n is the average number of morpholide repeating units, m is the average number of R1 repeating units, and n+m is 1 to 5. In accordance with the present invention, it is possible to provide a flame retardant thermoplastic resin compositions having improved flame retardancy even when small amounts of the flame retardant are used.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: June 10, 2003
    Assignee: Cheil Industries, Inc.
    Inventors: Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Publication number: 20030040560
    Abstract: The present invention relates to polyphosphate ester morpholides, compositions comprising mixtures thereof and thermoplastic resin compositions containing the polyphosphate ester morpholide composition as a flame retardant.
    Type: Application
    Filed: August 19, 2002
    Publication date: February 27, 2003
    Applicant: Cheil Industries Inc.
    Inventors: Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Patent number: 6437029
    Abstract: The present invention relates to a flame retardant thermoplastic resin composition that comprises a polycarbonate resin, a rubber modified styrene-grafted copolymer, a styrene-containing copolymer, a (meth)acrylic acid ester copolymer, a phosphoric acid ester as a flame retardant and a fluorinated polyolefin resin, which does not show coalescence of the domain resin that might be caused by the low viscosity at a high temperature, and poor flame retardancy, weld-line strength and mechanical properties such as impact strength, and which has a good balance of physical properties such as impact strength, heat resistance, heat stability, processability and appearance.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: August 20, 2002
    Assignee: Cheil Industries Inc.
    Inventors: Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Publication number: 20020091180
    Abstract: The present invention relates to polyphosphate ester morpholides, compositions comprising mixtures thereof and thermoplastic resin compositions containing the polyphosphate ester morpholide composition as a flame retardant.
    Type: Application
    Filed: November 28, 2001
    Publication date: July 11, 2002
    Applicant: Cheil Industries Inc.
    Inventors: Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Publication number: 20020077392
    Abstract: The present invention relates to a flame retardant thermoplastic resin composition that comprises a polycarbonate resin, a rubber modified styrene-grafted copolymer, a styrene-containing copolymer, a (meth)acrylic acid ester copolymer, a phosphoric acid ester as a flame retardant and a fluorinated polyolefin resin, which does not show coalescence of the domain resin that might be caused by the low viscosity at a high temperature, and poor flame retardancy, weld-line strength and mechanical properties such as impact strength, and which has a good balance of physical properties such as impact strength, heat resistance, heat stability, processability and appearance.
    Type: Application
    Filed: December 29, 2000
    Publication date: June 20, 2002
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Jong-Cheol Lim, Kyung-Hoon Seo, Sam-Joo Yang
  • Patent number: 5952408
    Abstract: The present invention relates to flameproof thermoplastic resin compositions comprising (A) a base resin comprising (1) 75 to 96% by weight of a thermoplastic, halogen-free polycarbonate, (2) 4 to 25% by weight of a styrene-containing graft copolymer, and (3) 0 to 10% by weight of a styrene-containing copolymer, (B) 5 to 20 parts by weight, per 100 parts by weight of the base resin (A), of a phosphate composition, and (C) 0.05 to 10 parts by weight, per 100 parts by weight of the base resin (A), of a zeolite. The addition of the zeolite component provides thermoplastic resin compositions with a good combination of physical properties, including improved long-term heat stability.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: September 14, 1999
    Assignee: Cheil Industries, Inc.
    Inventors: Kyu-cheol Lee, Sam-joo Yang, Bok-nam Jang
  • Patent number: 5674924
    Abstract: The present invention relates to flameproof thermoplastic resin compositions comprising (A) a base resin consisting of (1) 80 to 96% by weight of a thermoplastic, halogen-free polycarbonate, and (2) 4 to 20% by weight of a core-shell type ABS resin with a graft index of 40 or above, which is obtained by grafting 25 to 45% by weight of a styrene and 10 to 15% by weight of an acrylonitrile onto 45 to 60% by weight of a butadiene rubber, (B) 5 to 20 parts by weight, per 100 parts by weight of the base resin(A), of a phosphate composition, and (C) 0.1 to 2.0 parts by weight, per 100 parts by weight of the base resin(A), of a perfluoroalkane polymer. The phosphate composition is represented as the general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 independently of one another are C.sub.6 -C.sub.20 aryl or alkyl-substituted C.sub.6 -C.sub.20 aryl, n is 0 to 5, and the average n of the phosphate composition is, n is 0 to 5, about 0.3 to 0.8.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: October 7, 1997
    Assignee: Cheil Industries Inc.
    Inventors: Kyu-Cheol Lee, Sam-Joo Yang, Bok-Nam Jang
  • Patent number: 5643981
    Abstract: The flameproof thermoplastic resin compositions of this invention comprise from 2 to 20 parts by weight of aromatic diphosphates, from 2 to 7 parts by weight of phosphorous compounds and from 0.1 to 2.0 parts by weight of polyfluoroalkyl resins per 100 parts by weight of the resin mixture consisting of from 60 to 98% by weight of polycarbonate resins, from 2 to 40% by weight of styrene-containing graft copolymer resins, and from 0 to 20% by weight of styrene-containing copolymer resins. The structural formula of said aromatic diphosphates is as follows (I): ##STR1## in which, R.sup.1 and R.sup.2 are same or different lower alkyls, R.sup.3 and R.sup.4 are same or different hydrogen atom or alkyl groups, Y is a single bond or --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --S--, --SO.sub.2 --, --O--, --CO--, or --N.dbd.N--, k is 0 or 1, and m is an integer of 0 to 4.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: July 1, 1997
    Assignee: Cheil Industries, Inc.
    Inventors: Sam-Joo Yang, Bok-Nam Jang