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Rubber composition, vulcanized rubber and preparation method and application thereof

A composition and polymer technology, applied in transportation and packaging, rolling resistance optimization, special tires, etc., can solve the problem of not fully satisfying the high strength of tire sidewall rubber, large size of lignin aggregates, and unsatisfactory reinforcement effect, etc. problem, to achieve good dynamic flexibility, high strength, particle size reduction effect

Active Publication Date: 2020-10-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned prior art, lignin and its derivatives or carbon black are used to fill the rubber matrix, and the surface properties are quite different from the non-polar rubber matrix, so that the interaction between the two is weakened, and the strong hydrogen bonding between lignin makes The size of lignin aggregates is large, the processing performance is deteriorated, and the final reinforcement effect is not ideal
[0008] Therefore, the above-mentioned prior art cannot fully satisfy the high strength, low rolling resistance, and good dynamic flexibility required by the tire sidewall rubber containing the lignin formula, and it is necessary to provide a rubber composition with improved properties

Method used

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  • Rubber composition, vulcanized rubber and preparation method and application thereof
  • Rubber composition, vulcanized rubber and preparation method and application thereof
  • Rubber composition, vulcanized rubber and preparation method and application thereof

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preparation example Construction

[0050] The following provides some preferred specific embodiments for the method for preparing vulcanized rubber provided by the present invention.

[0051] Preferably, the polymer containing maleic anhydride structural units and diene structural units is selected from at least one of maleic anhydride grafted polybutadiene polymers and maleic anhydride grafted polyisoprene polymers.

[0052] In the rubber matrix, relative to 100 parts by weight of the rubber matrix, the content of the natural rubber is preferably 35-65 parts by weight, and the content of the butadiene rubber is preferably 35-65 parts by weight.

[0053] Preferably, the rubber matrix is ​​a mixture of butadiene rubber and natural rubber.

[0054] Preferably the natural rubber is SMR-20.

[0055] Preferably, the cis structure content in the butadiene rubber is 95-99% by weight.

[0056] According to a preferred embodiment, relative to 100 parts by weight of the rubber matrix, the amount of the interface modifi...

Embodiment 1

[0096] Rubber composition formula: 35 parts by weight of natural rubber, 65 parts by weight of butadiene rubber, 3 parts by weight of maleic anhydride grafted polybutadiene (interface modifier), 20 parts by weight of lignin, polyethylene glycol (plasticizer) Dispersant) 2 parts by weight, carbon black N550 20 parts by weight, carbon black N330 30 parts by weight, TDAE (softener) 3 parts by weight, zinc oxide (activator) 4 parts by weight, stearic acid (activator) 1 part by weight , 0.5 parts by weight of sulfur (vulcanizing agent), 5 parts by weight of TBBS (accelerator), 2 parts by weight of antioxidant 4020 (antiaging agent).

[0097] Preparation process of vulcanized rubber:

[0098] (1) First mix the rubber matrix and the interface modifier to obtain a section of masterbatch; specifically, add natural rubber and butadiene rubber into the internal mixer, set the rotation speed to 77rpm, and the initial mixing temperature to 70°C , the raw rubber masticating time is 0.3min;...

Embodiment 2

[0105] Rubber composition formula: 65 parts by weight of natural rubber, 35 parts by weight of butadiene rubber, 15 parts by weight of maleic anhydride grafted polybutadiene (interface modifier), 50 parts by weight of lignin, PEO-PPO-PEO block Copolymer (plasticizing dispersant) 8 parts by weight, carbon black N550 30 parts by weight, TDAE (softener) 10 parts by weight, zinc oxide (activator) 4 parts by weight, stearic acid (activator) 3 parts by weight, sulfur (vulcanizing agent) 4 parts by weight, accelerator D (accelerator) 1 weight part, anti-aging agent 4020 (anti-aging agent) 0.5 parts by weight.

[0106] Preparation process of vulcanized rubber:

[0107] (1) First mix the rubber matrix and the interface modifier to obtain a section of masterbatch; specifically, add natural rubber and butadiene rubber into the internal mixer, set the rotation speed to 77rpm, and the initial mixing temperature to 70°C , the plasticizing time of the raw rubber is 1 min; add the interface ...

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Abstract

The invention relates to the field of rubber, and discloses a rubber composition, vulcanized rubber, and preparation methods and applications thereof, wherein the composition contains a rubber matrix,an interface modifier, lignin, a plasticizing dispersant, an activator, an anti-aging agent, a softener, a vulcanizing agent and an accelerator, and optionally contains carbon black; wherein the interface modifier is a polymer containing a maleic anhydride grafted diene structural unit, and the rubber matrix contains a mixture of butadiene rubber and natural rubber. The rubber composition provided by the invention has the advantages of high strength, low rolling resistance and good dynamic flexibility, and vulcanized rubber formed by the composition can be used for tire sidewalls.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a rubber composition, a method for preparing vulcanized rubber, the vulcanized rubber prepared by the method and the application of the vulcanized rubber in tire sidewalls. Background technique [0002] In recent years, in order to adapt to the development trend of automobile tire safety, light weight, environmental protection, and greenness, coupled with people's attention to carbon black, the first reinforcing filler, which is relatively expensive and some have potential carcinogenic effects, lignin and its Derivatives are more and more valued in the field of tires because they can improve the mechanical strength of rubber, reduce hysteresis loss, reduce tire rolling resistance, and save vehicle fuel consumption. [0003] At the same time, the application of lignin as a natural polymer with high surface activity in the rubber industry has the advantages of less dust pollution, environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L7/00C08L51/00C08L97/00C08L71/02C08K13/02C08K3/04C08K3/22C08K5/09C08K3/06B60C1/00B29B7/00
CPCC08L9/00C08L7/00B60C1/0016B60C1/0025B29B7/005C08K2201/014C08K2003/2296C08L51/003C08L97/005C08L71/02C08K13/02C08K3/04C08K3/22C08K5/09C08K3/06C08K5/18Y02T10/86
Inventor 孙攀解希铭李静赵青松唐功庆
Owner CHINA PETROLEUM & CHEM CORP
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