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Rubber composition with low breathability

A rubber composition and air permeability technology are applied in the field of halogenated butyl rubber composition with low air permeability, which can solve the problems of carbon black dust polluting sewage discharge, reducing the strength performance of rubber compound, and high cost.

Inactive Publication Date: 2013-04-03
BEIJING RES & DESIGN INST OF RUBBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as far as the current situation of carbon black production process is concerned, the sensible heat of carbon black flue gas and the chemical heat of tail gas are not fully utilized, and the problems of carbon black dust pollution and sewage discharge still exist
[0005] Rubber is filled with a small amount of inorganic mineral fillers, such as clay, carbonate minerals, silicate minerals, coal gangue, etc. These fillers are rich in sources and relatively low in price, which solves the problem of complex carbon black process and high cost. However, The density of inorganic mineral fillers is higher than that of carbon black, and most of them are more filling, and basically have no reinforcing effect on rubber
Inorganic fillers are filled in the inner liner of tires, which will reduce the strength of the rubber compound and also have an adverse effect on the airtightness of the rubber compound

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] For the formula of the rubber composition, 32 parts of coal-based composite materials and 30 parts of carbon black N660 were used as reinforcing fillers, and the other components and dosages were the same as in Comparative Example 1, a total of 187.5 parts.

[0025] The mixing process, vulcanization and performance testing of the rubber composition are the same as in Comparative Example 1. The properties of the rubber composition after vulcanization are shown in Table 2. Compared with the properties of the vulcanized rubber composition in Comparative Example 1, the vulcanized rubber composition of Example 1 has a lower air permeability coefficient, low air permeability, and no significant change in other properties, and is suitable for tire inner liners.

[0026] Table 2 Performance of the rubber composition of Example 1 after vulcanization

[0027] project Example 1 Shore A hardness / degree 45 100% modulus stress / MPa 0.553 300% modulus stres...

Embodiment 2

[0029] For the formula of the rubber composition, 54 parts of coal-based composite materials and 10 parts of carbon black N660 were used as reinforcing fillers, and the other components and dosages were the same as in Comparative Example 1, a total of 189.5 parts.

[0030] The mixing process, vulcanization and performance testing of the rubber composition are the same as in Comparative Example 1. The properties of the rubber composition after vulcanization are shown in Table 3. Compared with the performance of the rubber composition after vulcanization in Comparative Example 1, the rubber composition of Example 1 has good flex resistance after vulcanization, but its strength performance has decreased, the air permeability coefficient has decreased, and it has low air permeability, which is more suitable for tires. airtight layer.

[0031] Table 3 Performance of the rubber composition of Example 2 after vulcanization

[0032] project Example 2 Shore A hardness...

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Abstract

The invention relates to a rubber composition with a low breathability. The rubber composition is prepared by using 50-100 parts of halogenated butyl rubber as a main raw material, using 10-60 parts of coal-based composite material and 10-70 parts of carbon black as a filling-reinforcing agent, matching with a vulcanizing agent, an accelerant, an activating agent, a softening agent and other processing accessory ingredients. The rubber composition is filled by the coal-based composite material and the carbon black commonly; compared with the normal rubber composition only filled with the carbon black, the rubber composition of the invention has low breathability, good flexing resistance property and strength property which can satisfy the using requirement; and the rubber composition is suitable for the inner liner of the tyre.

Description

[0001] technical field [0002] The invention relates to a rubber composition with low gas permeability, in particular to a low gas permeability halogenated butyl rubber composition suitable for filling coal-based composite materials in the tire inner liner. Background technique [0003] With the development of tires in the direction of radialization, tubeless and flattening, the requirements for the airtight performance of the tire inner liner are getting higher and higher. The function of the airtight layer is to reduce the permeability of air and moisture, keep the inflation pressure loss rate of the tire low, and prolong the service life of the tire. This requires that the innerliner rubber must have the characteristics of low air permeability, and at the same time have good flex fatigue resistance, aging resistance, and good adhesion with the carcass rubber. The airtight performance of rubber mainly depends on the raw rubber system and the type and amount of filler. At...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08K13/02C08K3/04C08K3/06C08K3/22C08K5/47
Inventor 颜晋均李花婷陈瑞军蔡尚脉陈名行张铁岭
Owner BEIJING RES & DESIGN INST OF RUBBER IND
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