Method for improving zinc oxide sulfuration activity

A technology of vulcanization activity and zinc oxide, which is applied in the field of natural rubber processing, can solve the problems of complex nano-zinc oxide preparation process, unfavorable popularization and application, and easy agglomeration of zinc oxide, and achieve obvious effects, increase vulcanization rate, and increase vulcanization activity.

Active Publication Date: 2015-11-04
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of nano-zinc oxide has adverse effects on the vulcanization and mixing process of rubber, which are manifested in: first, it delays the vulcanization of rubber; second, with the increase of the specific surface area of ​​zinc oxide, the interface effect is also corresponding increase, resulting in zinc oxide being easy to agglomerate and difficult to disperse in the rubber matrix; in addition, due to the complex preparation process and high production cost of nano-zinc oxide, it is also not conducive to its popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for improving zinc oxide vulcanization activity, comprising the steps of:

[0021] Weigh 2.5 parts of rare earth lanthanum oxide and 100 parts of ordinary zinc oxide, ball mill in planetary ball mill PM100 for 2 hours, then sinter at 150°C for 1 hour, mix and vulcanize according to the following rubber formula, and mix the rubber Test of vulcanization characteristics and mechanical properties of vulcanized rubber: 100 parts of natural rubber, 1 part of stearic acid, 2.5 parts of zinc oxide, 1.4 parts of accelerator, 2 parts of sulfur, and 30 parts of filler.

Embodiment 2

[0023] A method for improving zinc oxide vulcanization activity, comprising the steps of:

[0024] Weigh 5 parts of rare earth cerium oxide and 100 parts of ordinary zinc oxide, ball mill in planetary ball mill PM100 for 4 hours, then sinter at 300°C for 1 hour, mix and vulcanize according to the following rubber formula, and mix the rubber Test of vulcanization characteristics and mechanical properties of vulcanized rubber: 100 parts of natural rubber, 1 part of stearic acid, 2.5 parts of zinc oxide, 1.4 parts of accelerator, 2 parts of sulfur, and 30 parts of filler.

Embodiment 3

[0026] A method for improving zinc oxide vulcanization activity, comprising the steps of:

[0027] Weigh 7.5 parts of rare earth cerium oxide and 100 parts of ordinary zinc oxide, ball mill in planetary ball mill PM100 for 6 hours, then sinter at 600°C for 1 hour, mix and vulcanize according to the following rubber formula, and mix the rubber Test of vulcanization characteristics and mechanical properties of vulcanized rubber: 100 parts of natural rubber, 1 part of stearic acid, 2.5 parts of zinc oxide, 1.4 parts of accelerator, 2 parts of sulfur, and 30 parts of filler.

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Abstract

The invention relates to a method for improving zinc oxide sulfuration activity and belongs to the technical field of natural rubber processing. The method comprises adding 0.5-10 parts of rare earth oxide into 100 parts of common zinc oxide and carrying out ball milling and high temperature sintering rare earth doping. According to inherent characteristics of rare earth, zinc oxide particle conformation structure and ion surface chemical properties are changed, sulfuration activity is improved, a use ratio of zinc oxide in the rubber formula is reduced from 5: 100 to 2: 100, sulfuration time is shortened, natural vulcanized rubber crosslinking density and mechanical properties are improved and reasonable utilization and saving of a zinc ore resource are realized.

Description

technical field [0001] The invention relates to a method for improving the vulcanization activity of zinc oxide, which belongs to the technical field of natural rubber processing. Background technique [0002] The production of natural rubber products generally includes process steps such as mixing, calendering, lamination, molding, shaping, and vulcanization. Among them, the vulcanization process significantly affects the various properties and service life of rubber products, and is one of the most critical process steps in the production of rubber products. one. The vulcanization of natural rubber is a process in which sulfur cross-links rubber molecular chains through monosulfide bonds or polysulfide bonds to form a network structure. In the design of the vulcanization system, accelerators and active agents such as zinc oxide must be added to shorten the vulcanization time and improve the product. mechanical properties. [0003] As the most common vulcanization act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08K3/22C08L7/00
Inventor 王启方刘宏超王飞余和平魏丽娜刘彦妮
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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