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:
Nov. 08, 2022
Filed:
Jan. 12, 2018
Lg Chem, Ltd., Seoul, KR;
Min Jung Kim, Daejeon, KR;
Yong Yeon Hwang, Daejeon, KR;
Hyun Taek Oh, Daejeon, KR;
Bong Keun Ahn, Daejeon, KR;
Chun Ho Park, Daejeon, KR;
Eun Soo Kang, Daejeon, KR;
Yong Hee An, Daejeon, KR;
Jang Won Park, Daejeon, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
The present invention relates to a method of preparing an ASA graft copolymer, a method of preparing a thermoplastic resin composition including the ASA graft copolymer, and a method of manufacturing a molded article using the thermoplastic resin composition. More particularly, the present invention provides an ASA graft copolymer having improved thermal stability through addition of an emulsifier in a specific amount range in a seed preparation step and introduction of a multifunctional carboxylic acid having 20 or more carbon atoms or a salt thereof, as an emulsifier, in a shell preparation step and a high-quality thermoplastic resin composition exhibiting excellent impact resistance, such as impact strength and tensile strength, and excellent appearance, such as surface gloss, whiteness, and retention-associated heat discoloration, and causing considerable reduction in the amount of gas generated on a surface of a resin during a high-temperature thermoforming process due to inclusion of the ASA graft copolymer.