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Rubber composition and vulcanized rubber with self-healing function and preparation method and application thereof

A rubber composition and self-healing technology, applied in the field of rubber, can solve problems such as unsuitable tire self-healing materials, impact on anti-aging performance, inconsistent temperature range, etc.

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In some existing technologies for preparing self-healing tire rubber compositions, metal ions are one of the participants in the self-healing reaction of materials, but metal ions can affect the aging resistance of rubber materials. Although the prepared rubber compositions have Self-healing ability, but anti-aging performance is affected
[0008] In other existing technologies, the graphene / graphene oxide natural rubber composite masterbatch is used, and its technology also has an imperfect side. The optimal temperature range for self-healing is inconsistent with the temperature range used by tires, so it is not suitable for Self-healing material for tires

Method used

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  • Rubber composition and vulcanized rubber with self-healing function and preparation method and application thereof
  • Rubber composition and vulcanized rubber with self-healing function and preparation method and application thereof
  • Rubber composition and vulcanized rubber with self-healing function and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Mix 200 g of BR (3.7 mol butadiene units), 10 g (0.0172 mol) of Si69, and 3.370 g (0.034 mol) of 2-furanmethanol on a two-roll mill at a temperature of 20° C. to obtain a mixed rubber. 53.09 g of the rubber was taken from the aforementioned mixed rubber, and sheared at 145° C. for 10 min on a Hacker rheometer to obtain a polybutadiene rubber (namely modified rubber) grafted with furan groups. Theoretically, the molar ratio of groups in the rubber compound is n(furanyl) / n(butadiene structural unit)=0.0093≈0.01.

[0078] The initial temperature of the Hack rheometer was 60 ° C, the rotation speed was 20 r / min, 25 g (0.463 mol of butadiene units) of BR were added, and then a total of 1.5 g of graphene oxide was added in 3 times, followed by 1.99 g (0.00926 mol) of 6-maleimidohexanoic acid, finally add the remaining 25g (0.463mol butadiene unit) of BR (that is, BR total weight 50g), put down the top bolt, and increase the mixing temperature to make it not higher than 110 ℃...

Embodiment 2

[0082] Mix 200 g of BR (3.7 mol butadiene units), 2 g (0.00344 mol) of Si69, and 0.674 g (0.0068 mol) of 2-furanmethanol on a two-roll mill at a temperature of 20° C. to obtain a mixed rubber. 50.15 g of the rubber was taken from the aforementioned mixed rubber, and sheared at 145° C. for 10 min on a Hack rheometer to obtain a polybutadiene rubber (ie, modified rubber) grafted with furan groups. Theoretically, the molar ratio of the groups in the rubber compound is n(furanyl) / n(butadiene structural unit)=0.0019≈0.002.

[0083] The initial temperature of the Hack rheometer is 60 ° C, the rotation speed is 20 r / min, 25 g (0.463 mol of butadiene units) of BR are added, and then a total of 1.0 g of graphene oxide is added in 2 times, and then 0.40 g (0.00185 mol) of 6-maleimidohexanoic acid, finally add the remaining 25g (0.463mol butadiene unit) of BR (that is, BR total weight 50g), put down the top bolt, and increase the mixing temperature to make it not higher than 110 ℃, the ...

Embodiment 3

[0095] This embodiment adopts the method similar to embodiment 1 to carry out, the difference is:

[0096] In this example, the same molar amount of 2,5-furandimethanol is used to replace the 2-furandimethanol in Example 1, and the same molar amount (calculated as the rubber structural unit in the rubber molecule) is used to replace the example with isoprene rubber BR in 1, and replace the graphene oxide in Example 1 with the same molar amount of graphene.

[0097] The rest are the same as in Example 1.

[0098] In this example, the rubber composition F-IR / M-GE / IR (named as H3) with self-healing function is obtained.

[0099] In this example, sheet-like vulcanizate S3 is obtained.

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Abstract

The invention relates to the field of rubber, and discloses a rubber composition and vulcanized rubber with self-healing function and a preparation method and application thereof. The composition contains modified rubber, modified filler, vulcanizing agent, vulcanization active agent and vulcanization accelerator and a plasticizer, and any one of the modified rubber and the modified filler contains a dienoid group, and the other contains a dienophile group, and the dienoid group contains a carbon-carbon conjugated double bond in the dienophile group, and the dienophile group contains a carbon-carbon double bond, and the content of the modified rubber and the modified filler is such that the diene body in the composition The molar ratio of the content of the group to the dienophile group is (0.9-1.1):1. The vulcanized rubber provided by the present invention can produce self-healing effect.

Description

technical field [0001] The present invention relates to the field of rubber, in particular, to a rubber composition with self-healing function, a method for preparing vulcanized rubber, the vulcanized rubber prepared by the method and applications thereof. Background technique [0002] With the gradual implementation of the EU tire labeling law and the US "anti-dumping" law, the domestic and foreign auto industries have increasingly stringent requirements for tire safety, energy saving and durability. [0003] In 2015, the country's total tire output was 565 million, including 515 million radial tires (110 million full steel tires and 405 million semi-steel tires) and 50 million bias tires. If we can improve the quality of domestic tires, make them have self-healing function, improve durability and safety, it can save a lot of precious rubber and other raw material resources every year, reduce environmental pollution, and improve the market competitiveness of domestic tires....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L47/00C08K13/02C08K3/34C08K5/09C08K3/22
CPCC08L47/00C08K2003/2296C08L2205/025C08K13/02C08K3/346C08K5/09C08K3/22Y02T10/86
Inventor 赵青松解希铭王丽丽郑方远唐功庆王丽静孙攀
Owner CHINA PETROLEUM & CHEM CORP