Patents by Inventor Bok-Nam Jang

Bok-Nam Jang 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: 6653374
    Abstract: The flameproof thermoplastic resin composition of the present invention comprises (A) 40 to 95 parts by weight of a rubber modified styrene-containing resin composed of (a1) 20 to 100% by weight of a styrene-containing graft copolymer resin including 18 to 50% by weight of acrylonitrile in the copolymer excluding rubber; and (a2) 0 to 80% by weight of a styrene-containing copolymer resin containing 18 to 50% by weight of acrylonitrile; (B) 5 to 60 parts by weight of polyphenylene ether resin; (C) 2 to 40 parts by weight of a styrene-containing copolymer or styrene-containing graft copolymer resin containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the sum of (A) and (B); and (D) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound per 100 parts by weight of the sum of (A) and (B).
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: November 25, 2003
    Assignee: Cheil Industries Inc.
    Inventors: Bok-Nam Jang, Se-Jong Kim, Young-Kil Chang, Gyu-Cheol Lee
  • Patent number: 6646032
    Abstract: A flameproof thermoplastic resin composition of the present invention comprises (A) a base resin comprising 40 to 95% by weight of a rubber modified styrene-containing resin (a1) composed of 20 to 100% by weight of a styrene-containing graft copolymer resin (a11) and 0 to 80% by weight of a styrene-containing copolymer resin (a12), and 60 to 5% by weight of polyphenylene ether resin (a2); (B) 2 to 40 parts by weight of a styrene-acrylonitrile copolymer containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the base resin; (C) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound having a melting point of more than 90° C. per 100 parts by weight of the base resin; and (D) 3 to 30 parts by weight of a phenolic resin per 100 parts by weight of the base resin.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: November 11, 2003
    Assignee: Cheil Industries Inc.
    Inventors: Bok-nam Jang, Se-jong Kim, Gyu-cheol Lee, Young-kil Chang, Byeong-do Lee, Jung-hyun Kim
  • Publication number: 20030130385
    Abstract: The present invention relates to a flame retardant thermoplastic resin composition that comprises (A) about 40 to 95 parts by weight of a rubber modified styrene-containing resin, (B) about 5 to 60 parts by weight of polyphenylene ether resin, (C) about 2 to 30 parts by weight of a styrene-containing copolymer resin having about 5 to 18 % by weight of acrylonitrile in the copolymer per 100 parts by weight of the sum of (A) and (B), (D) about 0.5 to 20 parts by weight of an oxaphospholane compound per 100 parts by weight of the sum of (A) and (B), and (E) about 0 to 30 parts by weight of a phosphoric acid ester compound per 100 parts by weight of the sum of (A) and (B).
    Type: Application
    Filed: August 29, 2002
    Publication date: July 10, 2003
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Sang-Hyun Hong, Bok-Nam Jang, Young-Kil Chang, Sung-Hee Ahn, Jae-Ho Yang
  • Publication number: 20020161081
    Abstract: A flameproof thermoplastic resin composition is substantially free of phenolic resin, red phosphorous and silicone resin and comprises (A) about 40-95 parts by weight of a rubber modified styrene-containing resin comprising (a1) about 20-95% by weight of a styrene-containing graft copolymer resin containing about 19-50% by weight of acrylonitrile in the copolymer excluding rubber and (a2) about 5-80% by weight of a styrene-containing copolymer containing about 19-50% by weight of acrylonitrile; (B) about 5-60 parts by weight of a polyphenylene ether resin; (C) about 2-40 parts by weight of a compatabilizer comprising (c1) a styrene-containing copolymer containing about 5-18% by weight of acrylonitrile in the copolymer per 100 parts by weight of the sum of (A) and (B) or (c2) a styrene-containing graft copolymer having up to about 60% by weight of rubber wherein the compatabilizer contains about 5-18% by weight of acrylonitrile in the copolymer excluding rubber, per 100 parts by weight of the sum of (A) and (B
    Type: Application
    Filed: January 16, 2002
    Publication date: October 31, 2002
    Applicant: CHEIL INDUSTRIES, INC.
    Inventors: Bok-Nam Jang, Se-Jong Kim, Young-Kil Chang, Gyu-Cheol Lee
  • Publication number: 20020137824
    Abstract: A flameproof thermoplastic resin composition substantially free of phenolic resin, red phosphorous and silicone resin comprises (A) about 40-95 parts by weight of a rubber modified styrene-containing graft copolymer resin, (B) about 5-60 parts by weight of polyphenylene ether resin; (C) about 5-30 parts by weight of aromatic phosphoric acid ester per 100 part by weight of (A) and (B) wherein the styrene-containing copolymer chains in rubber modified styrene-containing resin (A) comprise
    Type: Application
    Filed: January 17, 2002
    Publication date: September 26, 2002
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Sang-Hyun Hong, Yong-Hae Kweon, Bok-Nam Jang, Young-Kil Chang, Gyu-Cheol Lee
  • Patent number: 6451889
    Abstract: A flameproof thermoplastic resin composition of the present invention comprises (A) 100 parts by weight of a rubber modified styrene-containing base resin composed of 20˜100% by weight of a styrene-containing graft copolymer resin and 0˜80% by weight of a styrene-containing copolymer resin; (B) 5˜40 parts by weight of a phenolic resin; (C) 3˜40 parts by weight of a PPE resin having a hindered phenolic structure; and (D) 5˜30 parts by weight of an aromatic phosphoric acid ester having a hindered phenolic structure. Said flameproof thermoplastic resin composition may further comprise 0.01˜2.0 parts by weight of a fluorine resin to 100 parts by weight of said rubber modified styrene-containing base resin.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: September 17, 2002
    Assignee: Cheil Industries, Inc.
    Inventors: Bok-nam Jang, Se-jong Kim, Gyu-cheol Lee
  • Publication number: 20020065343
    Abstract: A flameproof thermoplastic resin composition of the present invention comprises (A) a base resin comprising 40 to 95% by weight of a rubber modified styrene-containing resin (a1) composed of 20 to 100% by weight of a styrene-containing graft copolymer resin (a11) and 0 to 80% by weight of a styrene-containing copolymer resin (a12), and 60 to 5% by weight of polyphenylene ether resin (a2); (B) 2 to 40 parts by weight of a styrene-acrylonitrile copolymer containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the base resin; (C) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound having a melting point of more than 90° C. per 100 parts by weight of the base resin; and (D) 3 to 30 parts by weight of a phenolic resin per 100 parts by weight of the base resin.
    Type: Application
    Filed: December 6, 2001
    Publication date: May 30, 2002
    Applicant: Cheil Industries Inc.
    Inventors: Bok-Nam Jang, Se-Jong Kim, Guy-Cheol Lee, Young-Kil Chang, Byeong-Do Lee, Jung-Hyun Kim
  • 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