Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MODIFIED LIQUID DIENE-BASED RUBBER
Document Type and Number:
WIPO Patent Application WO/2019/069904
Kind Code:
A1
Abstract:
Provided are: a modified liquid diene-based rubber that exhibits superior pumpability, anti-dripping properties, and reactivity, that also exhibits a superior rubber elasticity in an obtained cured product, and that is suitably employed in a sealing material, a tire bead filler, and so forth; and a composition containing said modified liquid diene-based rubber. The present invention provides a modified liquid diene-based rubber (A) that has a functional group (a) originating from an acid anhydride and that satisfies all of the following requirements (I) to (III). (I) The functional-group equivalent quantity of the functional group (a) falls within a range of 400 to 3500 g/eq. (II) The polystyrene-converted number average molecular weight (Mn) falls within a range of 5000 to 20000 when measured by means of gel permeation chromatography (GPC). (III) The melt viscosity at 38ºC is equal to or greater than 3 Pa•s, and X, described below, is equal to or greater than 6100 K. X(K): regarding two values of melt viscosity η (Pa•s) measured at 38ºC and 60ºC by using a Brookfield viscometer, X(K) is the slope of a straight line that passes through these values when the two values are plotted on a graph in which 1/T (K-1) is taken on the horizontal axis and Ln[η/(Pa•s)] is taken on the vertical axis (where T is temperature (K)).

More Like This:
Inventors:
MOTODA Satoshi (1-1-3, Otemachi, Chiyodak, Tokyo 15, 〒1008115, JP)
KANEKO Shuhei (36, Towada, Kamisu-sh, Ibaraki 97, 〒3140197, JP)
NOZASA Yu (1-1-3, Otemachi, Chiyodak, Tokyo 15, 〒1008115, JP)
UEHARA Yosuke (1-1-3, Otemachi, Chiyodak, Tokyo 15, 〒1008115, JP)
KASHIOKA Masahiro (36, Towada, Kamisu-sh, Ibaraki 97, 〒3140197, JP)
UENO Yoshikazu (36, Towada, Kamisu-sh, Ibaraki 97, 〒3140197, JP)
Application Number:
JP2018/036839
Publication Date:
April 11, 2019
Filing Date:
October 02, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KURARAY CO., LTD. (1621, Sakazu Kurashiki-sh, Okayama 01, 〒7100801, JP)
International Classes:
C08C19/34; C08L15/00; C08L21/00; C09K3/10
Domestic Patent References:
WO2016104473A12016-06-30
WO2015137296A12015-09-17
Foreign References:
JP2016027163A2016-02-18
JP2017014373A2017-01-19
JPS58147407A1983-09-02
JP2013227382A2013-11-07
JPH06506004A1994-07-07
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (Gotanda Yamazaki Bldg. 6F, 13-6 Nishigotanda 7-chome, Shinagawa-k, Tokyo 31, 〒1410031, JP)
Download PDF: