阅读说明：本技术 一种改善耐老化性能的胎体用橡胶组合物 (Rubber composition for tire body with improved aging resistance ) 是由 张新军 陈瑞军 陈宏� 于 2018-07-23 设计创作，主要内容包括：本发明公开了一种轮胎胎体胶,所述胎体胶使用了高乙烯基聚丁二烯橡胶(HVBR),其组分按照质量配比如下：天然橡胶80~90份；高乙烯基聚丁二烯橡胶(HVBR)10~20份；氧化锌3~8份；硬脂酸1~4份；防老剂40201~2.5份；防老剂RD 1~2.5份；增粘体系4~7份；促进剂DZ 1~3份；不溶性硫磺IS7020 3~5份；环保芳烃油TDAE 3~10份；高分散白炭黑8~15份；炭黑N326 35~50份。该组合物具有较好的H抽出力、耐老化性能和较低的生热。(The invention discloses a tire carcass rubber, which uses high vinyl polybutadiene rubber (HVBR) and comprises the following components in parts by mass: 80-90 parts of natural rubber; 10-20 parts of high vinyl polybutadiene rubber (HVBR); 3-8 parts of zinc oxide; 1-4 parts of stearic acid; anti-aging agent 40201-2.5 parts; 1-2.5 parts of an anti-aging agent RD; 4-7 parts of a tackifying system; 1-3 parts of an accelerant DZ; 70203-5 parts of insoluble sulfur IS; 3-10 parts of environment-friendly aromatic oil TDAE; 8-15 parts of high-dispersion white carbon black; and (3) carbon black N32635-50 parts. The composition has good H extraction force, aging resistance and low heat generation.)

1. The aging-resistant tire body rubber is characterized by comprising the following components in parts by mass:

80-90 parts of natural rubber;

10-20 parts of high vinyl polybutadiene rubber (HVBR);

3-8 parts of zinc oxide;

1-4 parts of stearic acid;

anti-aging agent 40201-2.5 parts;

1-2.5 parts of an anti-aging agent RD;

4-7 parts of a tackifying system;

1-3 parts of an accelerant DZ;

70203-5 parts of insoluble sulfur IS;

3-10 parts of environment-friendly aromatic oil TDAE;

8-15 parts of white carbon black;

carbon black N32635-50 parts;

the high vinyl polybutadiene rubber is of a random structure, and the vinyl structure content of the high vinyl polybutadiene rubber is 70-90%;

the aging-resistant tire body rubber is prepared by mixing natural rubber and high vinyl polybutadiene rubber.

2. The aging-resistant tire carcass rubber according to claim 1, wherein the vinyl structure content of the high vinyl polybutadiene rubber is 75-85%.

3. The aging-resistant tire carcass gum according to claim 1, wherein the white carbon black is highly dispersed white carbon black.

Technical Field

The invention relates to the technical field of rubber, in particular to tire body rubber. The framework material of the carcass rubber can be any one of fiber, nylon or steel wire and the like. The composition of the bonding system in the composition is changed only according to different framework materials, for example, a certain amount of cobalt salt is added into a steel cord framework material to enhance bonding, and a non-steel cord framework material adopts a m-methyl white (resorcinol-RA-white carbon black) system.

Background

The carcass rubber is generally selected from all natural rubber or natural rubber and a small amount of styrene-butadiene rubber is used as a raw rubber system. Because natural rubber has high compound strength, excellent fatigue resistance and adhesion properties. However, during the use of the tire, the tire rotating at high speed is continuously deformed, and a large amount of heat is generated, so that the temperature of the tire is increased. The dynamic high temperature environment of use can cause fatigue failure of high sulfur content natural rubber systems, leading to possible safety hazards. Therefore, the formula adjustment is necessary to reduce the heat generation of the tire body rubber and improve the aging resistance of the material. If the modified polybutadiene rubber VCR412 produced in Japan is used together with natural rubber, the purposes of reducing heat generation and improving aging resistance can be achieved. VCR412 is a mixture of polybutadiene rubber and syndiotactic crystalline high vinyl polybutadiene resin.

The high vinyl polybutadiene rubber has excellent ageing resistance due to high side vinyl content and high main chain saturation, and is good in compatibility with natural rubber, and basically can be blended in any proportion. When it is blended and used with natural rubber, it can obviously improve the reversion property of natural rubber compound and ageing-resistant property of vulcanized rubber. The high vinyl polybutadiene rubber having a random structure is completely rubbery, having no crystallinity, and is completely different from 1,2 syndiotactic high vinyl polybutadiene which is resin due to crystallization.

Disclosure of Invention

The invention aims to provide a rubber for a tire body, which has low heat generation and improves the adhesion with a framework material after long-term high-temperature use.

The invention provides a rubber for a tire body, which uses high vinyl polybutadiene rubber (HVBR) and comprises the following components in percentage by mass: 80-90 parts of natural rubber; 10-20 parts of high vinyl polybutadiene rubber (HVBR); 3-8 parts of zinc oxide; 1-4 parts of stearic acid; anti-aging agent 40201-2.5 parts; 1-2.5 parts of an anti-aging agent RD; 4-9 parts of a tackifying system; 1-3 parts of an accelerant DZ; 70203-5 parts of insoluble sulfur IS; 3-10 parts of environment-friendly aromatic oil TDAE; 8-15 parts of high-dispersion white carbon black; and (3) carbon black N32635-50 parts.

The composition comprises 10-20 parts of high vinyl polybutadiene rubber (HVBR). The high vinyl polybutadiene rubber is a high molecular polymer with a random structure and 70-90% of vinyl content, and is completely different from a mixture formed by distributing high-crystalline 1,2 syndiotactic polybutadiene resin in high cis polybutadiene rubber. The vinyl group content is more preferably 75 to 85%.

The carcass rubber provided by the invention has the beneficial effects that: lower heat generation, good H extraction retention rate and excellent aging resistance.

Detailed Description

The following are non-limiting examples for a more clear understanding of the invention.