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Tyre inner liner based on butyl rubber comprising a low content of carbon black and another additional filler

A butyl rubber, inner lining technology, applied in special tires, tire parts, transportation and packaging, etc., can solve problems such as compound processability, and achieve the effect of low hysteresis and good durability

Inactive Publication Date: 2017-05-10
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of graphite may cause processability problems for the mixture

Method used

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  • Tyre inner liner based on butyl rubber comprising a low content of carbon black and another additional filler
  • Tyre inner liner based on butyl rubber comprising a low content of carbon black and another additional filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] Example 1: Rubber composition comprising inert filler and plasticizing oil

[0163] Table I below shows the ingredients and amounts (in phr) of the comparative composition (T1) and of the three compositions (C1 to C3) that can be used according to the invention.

[0164] Table I

[0165] T1 C1 C2 C3 Butyl rubber (1)

90 90 90 90 synthetic polyisoprene (2)

10 10 10 10 carbon black (3)

50 25 25 5 natural graphite - - 15 - natural chalk 20 20 20 40 plasticizer (4)

3 3 3 3 sulfur 1.5 1.5 1.5 1.5 MBTS (5)

1.2 1.2 1.2 1.2 ZnO 1.5 1.5 1.5 1.5 stearic acid 1.5 1.5 1.5 1.5

[0166] (1) Brominated polyisobutylene sold by Exxon Chemical Co.

[0167] (2) Synthetic polyisoprene containing 97% cis-1,4 structure sold under the name IR6596 by the company Nizhnekamsk

[0168] (3)N772

[0169] (4) TDAE oil

[0170] (5) 2-Mercaptobenzothiazole disulfide

[01...

Embodiment 2

[0181] Example 2: Rubber composition comprising inert filler and plasticizing resin

[0182] Table III below shows the ingredients and amounts (in phr) of the comparative composition (T2) and of the composition (C4) which can be used according to the invention.

[0183] Table III

[0184] T2 C4 Butyl rubber (1)

100 100 carbon black (2)

50 25 natural graphite 10 10 plasticizer (3)

8 8 sulfur 1.5 1.5 MBTS (4)

1.2 1.2 ZnO 1.5 1.5 stearic acid 1.5 1.5

[0185] (1) Brominated polyisobutylene sold by Exxon Chemical Co.

[0186] (2)N772

[0187] (3) Plasticizing resin: C5 fraction / C9 fraction resin sold under the name THER 8644 resin by Cray Valley Corporation (Tg=44°C)

[0188] (4) 2-Mercaptobenzothiazole disulfide

[0189]Composition T2 is a conventional control composition for tire innerliners, comprising 50 phr of carbon black, 10 phr of graphite and 8 phr of plasticizing resin.

[0190] ...

Embodiment 3

[0197] Example 3: Rubber composition containing neither inert filler nor plasticizer

[0198] Table V below shows the ingredients and amounts (in phr) of the comparative composition (T3) and of the composition (C5) that can be used according to the invention.

[0199] Table V

[0200] T3 C5 Butyl rubber (1)

100 100 carbon black (2)

50 25 natural graphite 10 10 sulfur 1.5 1.5 MBTS (3)

1.2 1.2 ZnO 1.5 1.5 stearic acid 1.5 1.5

[0201] (1) Brominated polyisobutylene sold by Exxon Chemical Co.

[0202] (2)N772

[0203] (3) 2-Mercaptobenzothiazole disulfide

[0204] Composition T3 is a conventional control composition for tire innerliners, comprising 50 phr of carbon black and 10 phr of graphite.

[0205] Composition C5 is according to the invention and comprises 25 phr of carbon black and 10 phr of graphite.

[0206] Table VI below lists the properties of compositions T3 and C5 after curing.

[0207...

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Abstract

The invention relates to a tyre inner liner having a rubber composition comprising: - an elastomeric matrix comprising at least 50 phr of one or more butyl rubbers, - from 5 to 35 phr of carbon black, - from 0 to less than 10 phr of a plasticizing agent, - at least 5 phr of one or more additional fillers selected from reinforcing fillers other than carbon black, semi-reinforcing fillers and inert fillers, the total content of reinforcing fillers and of semi-reinforcing fillers in the rubber composition varying from 5 to 50 phr. The invention also relates to a tyre comprising such a liner.

Description

technical field [0001] The present invention relates to a tire innerliner having a rubber composition comprising an elastomeric matrix based on butyl rubber and comprising a low content of carbon black and a low total content of reinforcing and semi-reinforcing fillers. [0002] The invention also relates to a tire comprising said inner liner. Background technique [0003] The inner surface of the tubeless tire has low air permeability to avoid tire deflation and protect the sensitive inner area of ​​the tire (such as the carcass including oxidation-sensitive metal cords) from oxygen and water intrusion, which protection can improve the tire's performance. durability. Currently, such protection of the inner surface of the tire is generally provided by an innerliner composed of an elastomeric composition based on butyl rubber. In fact, the performance of butyl rubber in terms of air impermeability leads to a large minimum thickness (in millimeters) and thus to a certain wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/22C08L7/00C08K3/04C08K3/26B60C1/00
CPCB60C1/0008C08L23/22C08L7/00C08K3/04C08K2003/265C08K3/26C08L23/283
Inventor A·里乌
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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