Title:
変性液状ジエン系ゴム
Document Type and Number:
Japanese Patent JP7466740
Kind Code:
B2
Abstract:
The invention provides a tire bead filler rubber composition. Cured products obtained from such a rubber composition exhibit excellent rubber elasticity, mechanical characteristics (rigidity) and adhesion with respect to various substrates. The tire bead filler rubber composition comprises 100 parts by mass of a solid rubber (B) , 1 to 20 parts by mass of a modified liquid diene rubber (A) having a functional group (a) derived from an acid anhydride, and satisfies all the requirements (I) to (III) below, 5 to 40 parts by mass of a phenolic resin (C) and 0.5 to 2.0 parts by mass of a curing agent (D): (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-1) on abscissa (with the proviso that T is temperature (K)).
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Inventors:
Satoshi Motoda
Shuhei Kaneko
Tomo Nozasa
Yousuke Uehara
Masahiro Kashioka
Yoshikazu Ueno
Shuhei Kaneko
Tomo Nozasa
Yousuke Uehara
Masahiro Kashioka
Yoshikazu Ueno
Application Number:
JP2023074882A
Publication Date:
April 12, 2024
Filing Date:
April 28, 2023
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08L21/00; B60C1/00; B60C15/06; C08C19/28; C08C19/34; C08L7/00; C08L15/00; C08L61/04; C09K3/10
Domestic Patent References:
| JP2009035682A | ||||
| JP2005226016A | ||||
| JP2017014373A | ||||
| JP56018632A | ||||
| JP57212239A |
Attorney, Agent or Firm:
Patent Attorney Corporation SS International Patent Office