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:
Apr. 23, 2019
Filed:
Nov. 22, 2016
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Drb Holding Co., Ltd., Busan, KR;
Joon Chul Park, Daegu, KR;
Mi Yeong Jo, Suwon-si, KR;
Kyung Bo Kim, Busan, KR;
Dong Hyun Kim, Busan, KR;
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
DRB Holding Co., Ltd., Busan, KR;
Abstract
An ethylene-propylene-diene monomer (EPDM) rubber composition for a sponge in a weather strip is provided. In the EPDM rubber composition free sulfur and 1,6-bis(N,N-dibenzylthiocarbamoyldithio)-hexane (BDBzTH) are included in a EPDM rubber having a pattern viscosity (MLat 125° C.) value of 90 or more and a content of 5-ethylidene-2-norbornene (ENB) of 9 wt % or more. The EPDM rubber composition can improve compression set and provides a solution to the persistent discoloration problem of the EPDM rubber. Provided herein are EPDM compositions that are useful as a material of a sponge section in a weather strip of a passenger car.