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. 03, 2023
Filed:
Oct. 02, 2018
Kuraray Co., Ltd., Kurashiki, JP;
Satoshi Motoda, Chiyoda-ku, JP;
Shuhei Kaneko, Kamisu, JP;
Yu Nozasa, Chiyoda-ku, JP;
Yosuke Uehara, Chiyoda-ku, JP;
Masahiro Kashioka, Kamisu, JP;
Yoshikazu Ueno, Kamisu, JP;
KURARAY CO., LTD., Kurashiki, JP;
Abstract
A modified liquid diene rubber (A) has a functional group (a) derived from an acid anhydride, and satisfies all the requirements (I) to (III) below: (I) The functional group equivalent weight of the functional groups (a) is in the range of 400 to 3,500 g/eq. (II) The polystyrene-equivalent number average molecular weight (Mn) measured by gel permeation chromatography (GPC) is in the range of 5,000 to 20,000. (III) The melt viscosity at 38° C. is not less than 3 Pa·s and X (K) is not less than 6100 K wherein X is the slope of a linear line passing through two points in a graph in which the two points are values of melt viscosity η (Pa·s) at 38° C. and 60° C. measured with a Brookfield viscometer which are plotted as Ln[η/(Pa·s)] on ordinate versus 1/T (K) on abscissa (with the proviso that T is temperature (K)).