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:
Jul. 17, 2018
Filed:
Jan. 26, 2016
Hyundai Mobis Co., Ltd., Seoul, KR;
Okong Corporation, Incheon, KR;
Seong Ho Kim, Suwon-si, KR;
Jung Hwan Lee, Yongin-si, KR;
Woo Sik Lee, Yongin-si, KR;
In Oh Hong, Incheon, KR;
Jong Il Park, Incheon, KR;
HYUNDAI MOBIS CO., LTD., Seoul, KR;
OKONG CORPORATION, Incheon, KR;
Abstract
Disclosed is a method for preparing a hot-melt adhesive composition and a hot-melt adhesive composition prepared thereby. The method comprises: preparing and mixing raw materials, including a butyl rubber, an ethylene propylene diene (EPDM) rubber, a styrene block copolymer, an amorphous poly-alpha-olefin (APAO) and a tackifier resin; and performing vacuum degassing of the mixed raw materials, wherein the styrene block copolymer comprises a styrene-isoprene-styrene (SIS) rubber. The hot-melt adhesive composition has high resistance in temperature cycles between low and high temperatures so as to maintain its physical properties, and thus has an excellent property of sealing a headlamp for a long period of time until the end of the lifespan of the headlamp. Also, the composition generates no gas in the sealed state of the headlamp, and thus does not create bubbles or voids and does not pose a water tightness problem.