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Flexible gradient fatigue-resistant rubber and preparation method thereof

A fatigue-resistant, rubber-based technology, applied in the field of rubber, can solve problems such as the difficulty of simultaneous vulcanization molding, the decline in the mechanical properties of rubber materials, fatigue resistance, and the difficulty of molding, so as to ensure orderly gradient distribution, reduce quality, and achieve The effect of the Soft Gradient property

Active Publication Date: 2021-08-31
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the simple splicing of rubber materials with different hardnesses not only increases the difficulty of molding, but also makes it difficult to meet the requirements of simultaneous vulcanization molding, and will also lead to stress concentration at the splicing point, resulting in a decrease in the mechanical properties of rubber materials including fatigue resistance.

Method used

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  • Flexible gradient fatigue-resistant rubber and preparation method thereof
  • Flexible gradient fatigue-resistant rubber and preparation method thereof
  • Flexible gradient fatigue-resistant rubber and preparation method thereof

Examples

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preparation example Construction

[0028] The preparation method of the flexible gradual fatigue-resistant lightweight rubber according to an exemplary embodiment of the present invention includes the following steps:

[0029] Step 1: Mix 5-15 parts with an average particle size of 7-40nm and a specific surface area of ​​100-500m 2 Add nano-silica per gram and 30-50 parts of hollow melamine microspheres with a particle size of 2-10 μm to 5-10 parts of liquid coumarone, stir at 100-500 rpm for 5-20 minutes, and drop 0.05-0.15 parts of Si69 , continue to stir for 3-5min, add to 90 parts of liquid rubber with a molecular weight of 10000-30000, the rubber is any one of natural rubber, styrene-butadiene rubber or butadiene rubber, stir for 10-20min, continue to add zinc oxide, stearin Acid, anti-aging agent and accelerator, stirred for 15-30min to obtain mixture A, the zinc oxide is a zinc oxide predispersion with 50% content, the dispersion medium is aromatic oil, and the stearic acid is 50% content Stearic acid p...

Embodiment 1

[0039] Step 1: Mix 5 parts with an average particle size of 7nm and a specific surface area of ​​500m 2 Nano-silica per gram and 30 parts of hollow melamine microspheres with a particle size of 2 μm were added to 5 parts of liquid coumarone, stirred at 100 rpm for 20 minutes, 0.05 parts of Si69 was added dropwise, continued to stir for 3 minutes, and 90 parts of melamine with a molecular weight of 10000 In the liquid rubber, rubber is natural rubber, stirs 10min, continues to add 10 parts of zinc oxides, 4 parts of stearic acid, 4 parts of antioxidants and 4 parts of accelerators, stirs 15mins, obtains mixture A, and described zinc oxide is 50 % content of the zinc oxide predispersion, the dispersion medium is an aromatic hydrocarbon oil, and the stearic acid is the stearic acid predispersion of 50% content, the dispersion medium is an aromatic hydrocarbon oil, and the accelerator is 50% of the content of the accelerator M. Accelerator pre-dispersion, dispersion medium is arom...

Embodiment 2

[0043] Step 1: Take 7 parts with an average particle size of 15nm and a specific surface area of ​​200m 2 Nano-silica per gram and 35 parts of hollow melamine microspheres with a particle size of 4 μm were added to 6 parts of liquid coumarone, stirred at 150 rpm for 8 minutes, 0.08 parts of Si69 was added dropwise, continued to stir for 4 minutes, and added to 90 parts of In the liquid rubber, rubber is natural rubber, stirs 12min, continues to add 10 parts of zinc oxides, 4 parts of stearic acid, 6 parts of antioxidants and 6 parts of accelerators, stirs 18mins, obtains mixture A, and described zinc oxide is 50 % content of the zinc oxide predispersion, the dispersion medium is an aromatic oil, and the stearic acid is the stearic acid predispersion of 50% content, the dispersion medium is an aromatic oil, and the accelerator is the 50% content of the accelerator NOBS Accelerator pre-dispersion, the dispersion medium is aromatic oil, the anti-aging agent is 50% content anti-ag...

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Abstract

The invention provides a kind of flexible and gradual fatigue-resistant rubber and a preparation method thereof, comprising 100 parts of liquid rubber, 5-15 parts of nano silicon dioxide, 0.05-0.15 parts of Si69, 30-50 parts of hollow melamine microspheres, and 2-2 parts of sulfur 3 parts, 4-8 parts of accelerator, 10 parts of zinc oxide, 4 parts of stearic acid, 4-10 parts of anti-aging agent, 5-10 parts of liquid coumarone, using the vacuum extraction process to achieve the gradient effect of rubber hardness , Broaden the application field of rubber.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a fatigue-resistant rubber with excellent flexibility and gradual change in hardness and a preparation method thereof. Background technique [0002] In the field of bionics, elastic rubber materials are often used as the exterior skin of bionic robots to protect the internal electrical circuits of the robot and meet the profiling requirements of the exterior. During the operation of the robot, due to the continuous movement of mechanical components, the rubber material used as the skin is often subjected to external stresses such as stretching, extrusion, and shearing. The rubber material is prone to cracks and damage, and loses the protection of internal components. Therefore, the bionic robot has high fatigue resistance requirements for the rubber material of the skin. Not only that, because the softness and hardness of different parts of the organism are inconsistent, so the profiling r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08L61/28C08L45/02C08K13/06C08K9/06C08K3/36C08K3/22C08K5/09C08K3/06B29C35/02
CPCB29C35/02C08K2003/2296C08K2201/011C08L7/00C08L2205/035C08L2205/20C08L61/28C08L45/02C08K13/06C08K9/06C08K3/36C08K3/22C08K5/09C08K3/06
Inventor 王经逸白昌龙茆阳雯卿俊臣马志红张家宾
Owner NANJING INST OF TECH
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