The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2012
Filed:
Nov. 05, 2008
Keun-hoon Yoo, Seoul, KR;
Chan-hong Lee, Daejeon, KR;
Jin-hyoung Lee, Gyeongsangbuk-do, KR;
Joo-byung Chai, Jeollanam-do, KR;
Yu-sung Jung, Jeollanam-do, KR;
Bong-keun Ahn, Jeollanam-do, KR;
Won-deok Han, Jeollanam-do, KR;
Keun-hoon Yoo, Seoul, KR;
Chan-hong Lee, Daejeon, KR;
Jin-hyoung Lee, Gyeongsangbuk-do, KR;
Joo-byung Chai, Jeollanam-do, KR;
Yu-sung Jung, Jeollanam-do, KR;
Bong-keun Ahn, Jeollanam-do, KR;
Won-deok Han, Jeollanam-do, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed is a method for preparing a thermoplastic resin with superior impact resistance, chemical resistance and processability as well as excellent gloss and whiteness. The method includes emulsion-polymerizing a conjugated diene compound monomer to prepare a rubber latex having an average particle diameter of 1,800 Å to 5,000 Å, a polymerization conversion ratio of at least 90% and a swelling index of 12 to 40, an average gel content of 70 to 95%, emulsion-polymerizing 45 to 75 parts by weight of the rubber latex with 17 to 40 parts by weight of an aromatic vinyl compound and 4 to 20 parts by weight of a vinyl cyanide compound to prepare a graft copolymer latex, and coagulating the graft copolymer latex with a coagulant at 60 to 80° C., and aging the graft copolymer latex at 80 to 99° C. to obtain a graft copolymer powder.