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Anti-aging natural rubber synthesis method

A natural rubber, anti-aging technology, applied in the field of synthetic anti-aging natural rubber, to achieve good aging performance, shorten the vulcanization time, and reduce the viscosity

Inactive Publication Date: 2018-05-29
SHENYANG SAIYA RUBBER PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The structure of the silane coupling agent is used for the pure purpose of improving the rubber / filler interaction. If other functional groups can be grafted on one end of the coupling agent, it can improve the reinforcing performance of silica and give it corresponding functions. There are few reports on this work, therefore, it is very necessary to develop a new type of aging-resistant rubber filled with anti-aging coupling agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An aging-resistant natural rubber composite material, prepared from the following raw materials in parts by weight: 135 parts of natural rubber, 45 parts of white carbon black VN3, 35 parts of carbon black N330, 6 parts of zinc oxide, 4 parts of stearic acid, anti-aging 3 parts of coupling agent, 8 parts of accelerator M and 3 parts of vulcanizing agent sulfur.

[0024] Preparation method, the steps are as follows:

[0025] (1) Synthesis of anti-aging silane coupling agent

[0026] Gamma-glycidyl ether oxypropyltrimethoxysilane and p-aminodiphenylamine are added in the reactor, and the mol ratio of the gamma-glycidyl etheroxypropyltrimethoxysilane and the p-aminodiphenylamine is 1: 1-2, feed nitrogen gas 0.2-0.6MPa, heating temperature 120-150°C, stirring speed 100-120r / min, stirring time 1-1.5h to prepare anti-aging silane coupling agent;

[0027] (2) In-situ modified filler

[0028] Weigh carbon black, white carbon black and anti-aging silane coupling agent into th...

Embodiment 2

[0036] An aging-resistant natural rubber composite material, prepared from the following raw materials in parts by weight: 130 parts of natural rubber, 44 parts of white carbon black VN3, 38 parts of carbon black N330, 7 parts of zinc oxide, 4 parts of stearic acid, anti-aging 3 parts of coupling agent, 7 parts of accelerator D and 3 parts of vulcanizing agent sulfur.

[0037] Preparation method, the steps are as follows:

[0038] (1) Synthesis of anti-aging silane coupling agent

[0039] Gamma-glycidyl ether oxypropyltrimethoxysilane and p-aminodiphenylamine are added in the reactor, and the mol ratio of the gamma-glycidyl etheroxypropyltrimethoxysilane and the p-aminodiphenylamine is 1: 1-2, feed nitrogen gas 0.2-0.6MPa, heating temperature 120-150°C, stirring speed 100-120r / min, stirring time 1-1.5h to prepare anti-aging silane coupling agent;

[0040] (2) In-situ modified filler

[0041] Weigh carbon black, white carbon black and anti-aging silane coupling agent into th...

Embodiment 3

[0049] An aging-resistant natural rubber composite material, prepared from the following raw materials in parts by weight: 140 parts of natural rubber, 48 parts of white carbon black VN3, 39 parts of carbon black N330, 8 parts of zinc oxide, 4 parts of stearic acid, anti-aging 3 parts of coupling agent, 8 parts of accelerator M and 4 parts of vulcanizing agent sulfur.

[0050] Preparation method, the steps are as follows:

[0051] (1) Synthesis of anti-aging silane coupling agent

[0052] Gamma-glycidyl ether oxypropyltrimethoxysilane and p-aminodiphenylamine are added in the reactor, and the mol ratio of the gamma-glycidyl etheroxypropyltrimethoxysilane and the p-aminodiphenylamine is 1: 1-2, feed nitrogen gas 0.2-0.6MPa, heating temperature 120-150°C, stirring speed 100-120r / min, stirring time 1-1.5h to prepare anti-aging silane coupling agent;

[0053] (2) In-situ modified filler

[0054] Weigh carbon black, white carbon black and anti-aging silane coupling agent into th...

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Abstract

The invention belongs to the technical field of rubber materials, and relates to an anti-aging natural rubber synthesis method, which comprises: (1) synthesizing an anti-aging silane coupling agent: adding gamma-glycidyl ether propyltrimethoxysilane and p-aminodiphenylamine to a reaction kettle, introducing 0.2-0.6 MPa nitrogen, heating to a temperature of 120-150 DEG C, and stirring for 1-1.5 h at a stirring rotation speed of 100-120 r / min to obtain anti-aging silane coupling agent; and (2) preparing an in-situ modified filler: weighing carbon black, white carbon black and an anti-aging silane coupling agent, placing into the reaction kettle, introducing 0.1-0.2 MPa N2 gas, carrying out heating to a temperature of 50-60 DEG C, and stirring for 1-1.5 h at a stirring rotation speed of 100-120 r / min to prepare the in-situ modified filler. According to the present invention, with the preparation method, the anti-aging natural rubber is prepared by adding the anti-aging coupling agent modified filler, such that the aging resistance of the rubber is improved, and the operation is simple; and the prepared anti-aging rubber has advantages of high strength, strong aging resistance and thelike.

Description

technical field [0001] The invention belongs to the technical field of rubber materials and relates to a method for synthesizing aging-resistant natural rubber. Background technique [0002] Natural rubber (NR) is the most widely used general-purpose rubber, but the excessive double bonds in its molecular structure cause the products to age easily. The application of anti-aging agent greatly prolongs the service life of rubber, but general anti-aging agent is easy to volatilize and migrate, which not only makes the performance of the product worse, but also pollutes the environment and endangers human health. The silane coupling agents used in the rubber industry are almost all sulfur-containing silane coupling agents, especially polysulfide silane coupling agents. The traditional coupling agent Si69 requires high mixing temperature during use, which is easy to cause scorching of the rubber material, and has the disadvantage of high porosity of the rubber material. [0003...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08K13/06C08K9/06C08K3/04C08K3/36C08K3/22C08K5/09
CPCC08K13/06C08K3/04C08K3/22C08K3/36C08K5/09C08K9/06C08K2003/2296C08L2201/08C08L7/00
Inventor 刘梦菲
Owner SHENYANG SAIYA RUBBER PRODS
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