High-flexural-fatigue-life aviation sidewall rubber as well as preparation method and application thereof

A technology of fatigue life and sidewall rubber, applied in the field of rubber, can solve the problems of low strength, poor processability of butadiene rubber, solar radiation aging resistance, etc., achieve high constant tensile stress, high flex fatigue life, and extend sidewall The effect of glue life

Active Publication Date: 2019-06-28
SHANDONG HUAJU POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sidewall rubber system of aviation tires is mostly natural rubber or a combination system of natural rubber and butadiene rubber or styrene-butadiene rubber, adding high-structure and high-wear-resistant N339 carbon black, paraffin wax, protective wax RP-3, and p-phenylenediamine anti-aging Agent, sulfur, sulfenamide accelerator DZ and other ingredients, but there are problems such as poor resistance to solar radiation aging and cracking resistance
Chinese invention patent application CN 104844850 A discloses a method of improving the solar radiation r...

Method used

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  • High-flexural-fatigue-life aviation sidewall rubber as well as preparation method and application thereof
  • High-flexural-fatigue-life aviation sidewall rubber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] 10 parts of trans-1,4-butadiene-isoprene copolymer rubber TBIR; 80 parts of natural rubber NR; 10 parts of butadiene rubber BR; 60 parts of carbon black N234; 10 parts of white carbon black; silane coupling agent Si69 8 parts; 5 parts of zinc oxide; 2.5 parts of stearic acid; 6 parts of plasticizer environmental aromatic oil; 2 parts of antioxidant RD; 3 parts of antioxidant 4020; anti-scorch agent N-cyclohexylthiophthaloyl 0.2 parts of amine; 1.8 parts of insoluble sulfur; 2 parts of accelerator CZ; 1 part of anti-reversion agent SVA-2.

[0076] Natural rubber (NR), grade SCR WF, ML3+4100℃=95.0, Jinshui Processing Plant of China Haijiao Group; butadiene rubber (BR), grade BR 9000, ML3+4100℃=42.0, Sinopec Qilu Branch; trans -1,4-butadiene-isoprene copolymer rubber (TBIR), butadiene content is 19.8mol%, trans-1,4-structure content>95mol%, Mooney viscosity ML3+4100℃=60.5 , weight average molecular weight 540,000g / mol, molecular weight distribution index 3.09, Shandong Hu...

Embodiment 2

[0092] Same as Example 1, except that the number of BR copies is 0, and the number of TBIR copies is 20. The obtained mechanical properties are listed in Table 1.

Embodiment 3

[0094] Same as Example 1, except that the vulcanization time is 5 times of the positive vulcanization time of the vulcanization characteristic test at 130°C. The obtained mechanical properties are listed in Table 1.

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Abstract

The invention relates to a formula of high-flexural-fatigue-life aviation sidewall rubber and particularly relates to application and a preparation method of aviation tire sidewall rubber containing trans-1,4-butadiene-isoprene copolymer rubber. The sidewall rubber contains the following substances in parts by weight: 5-30 parts of trans-1,4-butadiene-isoprene copolymer rubber TBIR, 50-85 parts ofnatural rubber NR, 10-20 parts of butadiene rubber BR, 0-80 parts of carbon black, 0-30 parts of silicon dioxide, 0-5 parts of a silane coupling agent Si690, 0-10 parts of a plasticizer, 0-0.8 part of a scorch retarder, 0.5-3 parts of sulfur, 0.3-5 parts of an accelerant and other aids. The sidewall rubber is prepared by virtue of a three-section banburying and open milling process. The Green strength of the mixed sidewall rubber is more than 3MPa, vulcanized rubber has the stress at definite elongation of 300% of over 18MPa, and the flexure-resistance 6-level cracking number of times is over80000.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to an aviation sidewall rubber with high flex fatigue life, its preparation method and application. Background technique [0002] The sidewall rubber is the part of the tire that undergoes extremely frequent flexing and deformation, and should have excellent flex cracking resistance. When aviation tires are used, the tread is easy to wear after many take-offs and landings, and the usual way to deal with it is to retread. During retreading, when the newly bonded tread rubber undergoes the vulcanization process, the original sidewall rubber will be subjected to high temperature and high pressure again, which is prone to aging. Therefore, the sidewall rubber should have good aging resistance and vulcanization flatness. Retreading tires is a huge test for sidewall rubber, requiring that the sidewall rubber maintain its performance after multiple vulcanizations. [0003] At...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/00C08K13/02C08K3/04C08K3/36C08K3/22C08K5/09B29B7/00B29C35/02
Inventor 邵华锋贺爱华马韵升栾波王日国
Owner SHANDONG HUAJU POLYMER MATERIALS CO LTD
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