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. 29, 2019
Filed:
Mar. 01, 2016
Mitsui Chemicals, Inc., Tokyo, JP;
Fumito Takeuchi, Chiba, JP;
Kengo Goto, Chiba, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
The present invention is a crosslinked body obtained by crosslinking a composition which comprises 100 parts by mass of (A) an ethylene/α-olefin/non-conjugated polyene copolymer having one or more peaks of tan δ in the temperature range of −50 to −30° C., the tan δ being determined by dynamic viscoelasticity measurement, 50 to 500 parts by mass of (B) an olefin-based copolymer having one or more peaks of tan δ in the temperature range of 0 to 40° C., the tan δ being determined by dynamic viscoelasticity measurement, 5 to 300 parts by mass of (C) a softener, 10 to 300 parts by mass of (D) a reinforcing filler and 0.1 to 10 parts by mass of (E) a vulcanizing agent, and which has a content ratio by mass ((C)/(D)) of (C) the softener to (D) the reinforcing filler of 0.3 to 1.5, the crosslinked body having a durometer hardness (value immediately after measurement) of 50 to 8. The crosslinked body of the present invention has high hardness and low rebound resilience compatible with each other, and from the crosslinked body, a vibration damper having high hardness and low rebound resilience compatible with each other and various products requiring vibration damping properties can be obtained.