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

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

Active Publication Date: 2019-11-01
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 with self-healing function, vulcanized rubber, and preparation method and application thereof
  • Rubber composition with self-healing function, vulcanized rubber, and preparation method and application thereof
  • Rubber composition with self-healing function, vulcanized rubber, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 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-furan methanol were mixed on a two-roll open mill at a temperature of 20°C to obtain a rubber compound. Take 53.09g of the rubber from the aforementioned rubber compound and cut it on a Haake rheometer at 145°C for 10 minutes to obtain a polybutadiene rubber grafted with furan groups (that is, a modified rubber). Theoretically, the molar ratio of groups in the rubber compound is n (furyl) / n (butadiene structural unit) = 0.0093≈0.01.

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

Embodiment 2

[0082] 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-furan methanol were mixed on a two-roll open mill at a temperature of 20° C. to obtain a rubber compound. Take 50.15 g of rubber from the aforementioned rubber compound, and shear it on a Hacker rheometer at 145°C for 10 minutes to obtain a polybutadiene rubber grafted with furan groups (that is, a modified rubber). Theoretically, the molar ratio of groups in the rubber compound is n (furyl) / n (butadiene structural unit) = 0.0019≈0.002.

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

Embodiment 3

[0095] This embodiment adopts a method similar to that of Embodiment 1, except that:

[0096] In this example, the same molar amount of 2,5-furandimethanol was used to replace 2-furanmethanol in Example 1, and the same molar amount of isoprene rubber (calculated as the rubber structural unit in the rubber molecule) was used to replace the example. 1 in BR, 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, a rubber composition F-IR / M-GE / IR (named H3) with self-healing function was obtained.

[0099] In this example, a sheet-shaped vulcanized rubber S3 was obtained.

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Abstract

The invention relates to the field of rubber, and discloses a rubber composition with a self-healing function, vulcanized rubber, and a preparation method and application thereof. The composition includes modified rubber, a modified filler, a vulcanizing agent, a vulcanization activating agent, a vulcanization accelerator and a plasticizer, wherein one of the modified rubber and the modified filler contains a diene group, and the other contains a dienophile group, with the diene group containing a carbon-carbon conjugated double bond, and the dienophile group containing a carbon-carbon doublebond; and the contents of the modified rubber and the modified filler are configured such that the mole ratio of the diene group to the dienophile group in the composition is (0.9-1.1):1. The vulcanized rubber is capable of producing a self-healing effect.

Description

Technical field [0001] The invention relates to the field of rubber, in particular to a rubber composition with self-healing function, a method for preparing vulcanized rubber, and 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 "double reverse" law, the domestic and foreign automotive industries have increasingly stringent requirements for tire safety, energy saving, and durability. [0003] In 2015, the total national tire output was 565 million, of which radial tires were produced 515 million (110 million full-steel tires, 405 million semi-steel tires), and 50 million bias tires were produced. If the quality of domestic tires can be improved to have self-repairing functions, durability and safety, a large amount of precious rubber and other raw material resources can be saved every year, environmental pollution can be reduced, and the market competitiveness...

Claims

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Application Information

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Patent Type & Authority Applications(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