Tire sidewall rubber and preparation method thereof

A technology for sidewall rubber and tires, which is applied in special tires, tire parts, rolling resistance optimization, etc. It can solve problems such as mixing formula and method to be studied, and achieve compatibility and co-vulcanization characteristics improvement, fatigue resistance performance Improved and excellent fatigue resistance

Active Publication Date: 2019-09-27
SHANDONG HUAJU POLYMER MATERIALS CO LTD
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Problems solved by technology

The team also studied trans-butadiene rubber to replace natural rubber or butadiene rubber in the sidewall rubber of car tires (Synthetic Rubber Industry, 3 (2018): 313-317), and found that car tire sidewalls containing trans-butadiene rubber The rubber has better resistance to fatigue crack growth. In order to better improve its application performance, the mixing formula and method need to be studied.

Method used

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  • Tire sidewall rubber and preparation method thereof
  • Tire sidewall rubber and preparation method thereof
  • Tire sidewall rubber and preparation method thereof

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preparation example Construction

[0051] The present invention also provides a kind of preparation method of above-mentioned tire sidewall rubber, comprises the following steps:

[0052] A) mixing natural rubber, TBIR-BR masterbatch, zinc oxide, stearic acid, anti-aging agent, filler and process oil in banburying to obtain one stage of masterbatch;

[0053] B) mixing said one-stage masterbatch, accelerator and sulfur banburying to obtain two-stage masterbatch;

[0054] C) The second-stage masterbatch is opened for kneading, and the obtained final mix is ​​placed at a temperature of 21-25° C. and a humidity of 30-80% for 4-168 hours;

[0055] D) vulcanizing the final rubber mix after standing at a temperature of 140-180° C. and a pressure of 10-35 MPa to obtain tire sidewall rubber.

[0056] In the preparation method, the components and proportions of the raw materials are the same as above, and will not be repeated here.

[0057] In an embodiment of the present invention, the TBIR-BR masterbatch is prepared ...

Embodiment 1

[0081] Preparation of TBIR-BR masterbatch:

[0082] The trans-butadiene rubber TBIR-0963 and butadiene rubber BR 9000 were banburyed and blended according to the mass ratio of 50:10. The blending input coefficient is 0.75, and the mixing time is 3 minutes.

[0083] Prepare tire sidewall compound:

[0084] First mix natural rubber and TBIR-BR masterbatch for 1min, then add zinc oxide, stearic acid, anti-aging agent (3 parts by weight of anti-aging agent 4020, 1.5 parts by weight of anti-aging agent RD and 1.5 parts by weight of paraffin), carbon black N330, carbon black dispersant and environmental protection aromatic hydrocarbon oil VIVATEC 500 banbury mixing 4min; The temperature of twice banbury blending is 70 ℃, the rotating speed is 70rpm, and the feeding coefficient is 0.75. The glue temperature is 155°C, and a section of masterbatch is obtained;

[0085] Put one stage of masterbatch into the banbury mixer, add accelerator NS and sulfur powder for banbury mixing to obt...

Embodiment 2

[0090] Preparation of TBIR-BR masterbatch:

[0091] Trans-butadiene rubber TBIR-2063 and butadiene rubber BR 9000 were banburyed and blended according to the mass ratio of 50:10. The blending input coefficient is 0.75, and the mixing time is 3 minutes.

[0092] Prepare tire sidewall compound:

[0093] First mix natural rubber and TBIR-BR masterbatch for 1min, then add zinc oxide, stearic acid, anti-aging agent (3 parts by weight of anti-aging agent 4020, 1.5 parts by weight of anti-aging agent RD and 1.5 parts by weight of paraffin), carbon black N330, carbon black dispersant and naphthenic oil banbury mixing 5min; The temperature of twice banbury blending is 70 ℃, and the rotating speed is 70rpm, and the feeding coefficient is 0.75, and the debinding temperature after described banbury blending at 155°C to obtain a section of masterbatch;

[0094] Put one stage of masterbatch into the banbury mixer, add accelerator NS and sulfur powder for banbury mixing to obtain the seco...

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Abstract

The invention relates to the field of rubber processing, in particular to tire sidewall rubber and a preparation method thereof. The tire sidewall rubber is prepared from the following components in parts by weight: 30-80 parts of natural rubber, 20-70 parts of TBIR-BR masterbatch, 2-7 parts of zinc oxide, 1-3.5 parts of stearic acid, 3-7 parts of an anti-aging agent, 40-60 parts of filler, 2-8 parts of operating oil, 0-3 parts of a filler dispersant, 0.8 -2 parts of an accelerator, 0.6-2 parts of sulfur, and 0-0.4 part of an anti-reversion agent. According to the tire sidewall rubber and the preparation method thereof provided by the invention, the natural rubber and the TBIR-BR masterbatch are matched with other components to achieve a synergistic effect, so that the compatibility and co-vulcanization characteristics of the natural rubber and butadiene rubber are further improved; the filler is more uniformly distributed in the natural rubber and the butadiene rubber; finally, the obtained tire sidewall rubber is relatively good in fatigue resistance, and relatively low in rolling resistance and compression heat generation.

Description

technical field [0001] The invention relates to the field of rubber processing, in particular to a tire sidewall rubber and a preparation method thereof. Background technique [0002] During the driving process of the tire, the sidewall part is prone to cracks due to repeated bending deformation. The formation and expansion of cracks lead to sidewall fatigue failure is an important reason affecting the service life of the tire. Among general-purpose rubber materials, natural rubber has excellent mechanical strength and fatigue crack growth resistance, butadiene rubber has excellent fatigue crack initiation performance; but natural rubber and butadiene rubber have poor compatibility and co-vulcanization characteristics And the filler will be preferentially dispersed in the butadiene rubber phase region, so that the existing radial tire sidewall rubber cannot have both excellent resistance to fatigue crack initiation and fatigue crack growth. [0003] With the rapid developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08K13/02C08K3/22C08K5/09B60C1/00B29B7/18B29B7/28B29B7/52B29B7/72B29B7/82
CPCB29B7/183B29B7/28B29B7/52B29B7/72B29B7/823B60C1/0016C08K2003/2296C08L7/00C08L2205/025C08L2205/03C08L9/00C08K13/02C08K3/22C08K5/09Y02T10/86
Inventor 栾波王日国贺爱华王浩邵华锋李兰阁
Owner SHANDONG HUAJU POLYMER MATERIALS CO LTD
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