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Natural rubber formula with high adhesive strength

A natural rubber and formula technology, applied in the rubber field, can solve the problems of poor compatibility, delamination of semi-finished self-adhesive parts, air bubbles, and large strength drop, and achieves improved strength, reduced decomposition and odorous substances, and stabilized doors. The effect of the viscosity

Active Publication Date: 2020-09-18
CHONGQING LINGFENG RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The quality problems of traditional reclaimed rubber applied to various parts of tires are mainly manifested in: the compatibility between reclaimed rubber and natural rubber is too poor, resulting in a large decrease in strength; The self-adhesiveness of the semi-finished product is greatly reduced, because the self-adhesiveness of the semi-finished product is too poor to easily cause delamination and air bubbles between the parts. Reclaimed rubber is used in tire components with high safety performance requirements such as cushion rubber and sidewall

Method used

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  • Natural rubber formula with high adhesive strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation of embodiment 1 reclaimed rubber 1

[0022] Preparation of modified carbon nanotubes: Weigh 1 g of melamine and add it to 50 ml of methanol, stir magnetically at room temperature for 12 hours, add 200 mg of carbon nanotubes, continue magnetic stirring for 6 hours, keep the temperature at 70°C until the methanol is completely volatilized, and dissolve the remaining solid Placed in a muffle furnace, fired at 550° C. for 4 hours to obtain modified carbon nanotubes.

[0023] Pretreatment: Stir and mix 25wt% nitric acid and 30wt% sulfuric acid according to the volume ratio of 3:1 to obtain a mixed acid solution, and stir and disperse the modified carbon nanotubes according to a solid-to-liquid ratio of 1:100g / ml in the mixed acid solution, Place in an ultrasonic oscillator, raise the temperature to 70°C, keep warm and shake continuously for 10 hours, filter and wash with deionized water until the pH is 6-7, and dry.

[0024] Preparation of activated auxiliar...

Embodiment 2

[0029] Embodiment 2 Preparation of reclaimed rubber 2

[0030] Preparation of modified carbon nanotubes: Weigh 1.64g of melamine and add it to 80ml of methanol, stir magnetically for 12h at room temperature, add 250mg of carbon nanotubes, continue magnetically stirring for 6h, and keep the temperature at 70°C until the methanol is completely volatilized. The solid was placed in a muffle furnace and calcined at 550° C. for 4 hours to obtain modified carbon nanotubes.

[0031] Pretreatment: Stir and mix 25wt% nitric acid and 30wt% sulfuric acid according to the volume ratio of 3:1 to obtain a mixed acid solution, and stir and disperse the modified carbon nanotubes according to a solid-to-liquid ratio of 1:100g / ml in the mixed acid solution, Place in an ultrasonic oscillator, raise the temperature to 70°C, keep warm and shake continuously for 10 hours, filter and wash with deionized water until the pH is 6-7, and dry.

[0032]Preparation of activated auxiliary particles: Weigh 4...

Embodiment 3

[0037] Embodiment 3 Preparation of reclaimed rubber 3

[0038] Preparation of modified carbon nanotubes: Weigh 2 g of melamine and add it to 65 ml of methanol, stir magnetically for 12 hours at room temperature, add 200 mg of carbon nanotubes, continue magnetically stirring for 6 hours, keep the temperature at 70°C until the methanol is completely volatilized, and dissolve the remaining solid Placed in a muffle furnace, fired at 550° C. for 4 hours to obtain modified carbon nanotubes.

[0039] Pretreatment: Stir and mix 25wt% nitric acid and 30wt% sulfuric acid according to the volume ratio of 3:1 to obtain a mixed acid solution, and stir and disperse the modified carbon nanotubes according to a solid-to-liquid ratio of 1:100g / ml in the mixed acid solution, Place in an ultrasonic oscillator, raise the temperature to 70°C, keep warm and shake continuously for 10 hours, filter and wash with deionized water until the pH is 6-7, and dry.

[0040] Preparation of activated auxiliar...

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Abstract

The invention discloses a natural rubber formula with high adhesive strength, and relates to the technical field of rubber. The natural rubber formula with high adhesive strength comprises, by weight,40 to 50 parts of natural rubber, 60 to 70 parts of reclaimed rubber, 5 to 8 parts of carbon black, 0.8 to 0.9 part of zinc oxide, 0.3 to 0.4 part of stearic acid, 2 to 3 parts of an anti-aging agent, 1.5 to 2.0 parts of a vulcanization accelerator, 1.2 to 1.8 parts of a vulcanizing agent and 0.6 to 1.0 part of a processing aid. The reclaimed rubber is prepared by taking waste steel wire load-bearing outer tire treads as a raw material, crushing, removing impurities, adding an activating agent and activating auxiliary particles, and performing microwave desulfurization, activation and regeneration. The natural rubber formula with high adhesive strength takes natural rubber and reclaimed rubber as main raw materials, the used reclaimed rubber takes waste tires as the raw material and has good compatibility with the natural rubber after being crushed, desulfurized and activated, and a rubber compound prepared by adopting the formula has high adhesive strength.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a high-adhesive natural rubber formula. Background technique [0002] China is a big rubber application country, and its annual consumption of rubber ranks first in the world. s solution. On the other hand, with the development of society and the continuous popularization of automobiles, a large number of waste tires are produced. This is a renewable resource, a "treasure" in the field of new materials, and it can even be said to be an inexhaustible gold mine. Especially in the current shortage of rubber resources in China, the recycling of waste rubber products has more positive significance. [0003] Reclaimed rubber can replace part of raw rubber to produce various rubber products, or use 100% reclaimed rubber to produce low-grade rubber products, which has a history of several decades in our country. Due to the excellent processing performance and low price of reclaimed ru...

Claims

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Application Information

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IPC IPC(8): C08L17/00C08L7/00C08L9/02C08L91/00C08K13/06C08K3/04C08K3/22C08K5/09C08K9/04C08K9/12C08K3/16C08K9/02C08K3/06C08J11/10
CPCC08L17/00C08J11/10C08J2317/00C08L2205/035C08K2003/2296C08L7/00C08L9/02C08L91/00C08K13/06C08K3/04C08K3/22C08K5/09C08K9/04C08K9/12C08K3/16C08K9/02C08K3/041C08K3/06Y02W30/62
Inventor 刘光超周亮刘春红
Owner CHONGQING LINGFENG RUBBER PROD
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