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Environment-friendly deproteinized natural rubber with constant Mooney viscosity, and preparation method thereof

A technology of natural rubber and Mooney viscosity, which is applied in the field of constant Mooney viscosity natural rubber and its preparation, can solve the problems of reducing the dynamic performance of natural rubber, electrical conductivity, protein prone to mold, loss of constant viscosity effect, etc., to achieve environmental protection constant Viscous effect, low cost, small change in Mooney viscosity

Active Publication Date: 2020-02-21
华君橡胶科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydroxylamine compounds are toxic substances, and many countries have banned their use; hydroxylamine compounds themselves are easy to decompose, and the oxime formed by the reaction of amine groups and aldehyde groups is also unstable, and will lose the constant viscosity effect due to further prolongation of storage time
[0004] On the other hand, natural rubber contains a certain amount of protein, which is prone to mold due to the influence of the environment, and also reduces the dynamic performance and electrical conductivity of natural rubber.

Method used

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  • Environment-friendly deproteinized natural rubber with constant Mooney viscosity, and preparation method thereof
  • Environment-friendly deproteinized natural rubber with constant Mooney viscosity, and preparation method thereof
  • Environment-friendly deproteinized natural rubber with constant Mooney viscosity, and preparation method thereof

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preparation example Construction

[0037] The preparation method of the environment-friendly deproteinized constant Mooney viscosity natural rubber comprises: treating the natural rubber latex with alkaline protease and a water-based environment-friendly constant viscosity agent. It only needs to add an alkaline protease treatment process in the existing natural rubber primary processing production process, and does not need to change the original equipment and other processes.

[0038] The preferred preparation method is as follows:

[0039] (1) mixing natural rubber latex with alkaline protease for no less than 40min;

[0040] (2) Configure the environment-friendly constant viscosity agent solution: after diluting the environment-friendly constant viscosity agent and pure water in a certain proportion, mix them evenly and set aside for later use. The pH value is controlled at ≤ 8.5;

[0041] (3) Mix the product obtained in the above step (1) with the constant viscosity agent solution in step (2) for no less ...

Embodiment 1

[0050] The natural rubber fresh latex is fully filtered through a purifier to remove impurities, and water is added to adjust the solid content of the latex to 25%. Dilute the environment-friendly constant viscosity agent hydrazinopropanol and pure water at a ratio of 1:50, and mix well to obtain the constant viscosity agent solution for later use. Take by weighing constant viscosity agent solution by 3% of natural rubber latex weight, add in the latex and mix, stir 20 minutes. The mixed latex is coagulated, soaked, floated, rinsed, and dried to obtain a constant-viscosity natural rubber.

Embodiment 2

[0052] Carry out according to the technique described in Example 1, but before adding constant viscosity agent, take by weighing alkaline protease (bromelain) earlier by 4‰ of natural latex weight, add in the latex and mix, stir 40 minutes, then use Constant viscosity treatment.

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Abstract

The invention discloses environment-friendly deproteinized natural rubber with constant Mooney viscosity and a preparation method of the environment-friendly deproteinized natural rubber, andbelongs to the technical field of natural rubber processing. The environment-friendly deproteinized natural rubber with constant Mooney viscosity is prepared by adding a certain proportion of alkaline proteaseand a water-based environment-friendly constant-viscosity agent into fresh natural rubber latex. The production method is simple, no pollution is caused, cost is low, and efficiency is high. The Mooney viscosity of the obtained environment-friendly deproteinized natural rubber with constant Mooney viscosity is more stable than that of common constant-viscosity natural rubber in the storage process, the protein content of the environment-friendly deproteinized natural rubber is low, and the adopted alkaline protease is a food additive and is non-toxic and harmless; the adopted water-based environment-friendly constant-viscosity agent is weakly alkaline, safe, non-toxic and non-corrosive, has stable performance under high-temperature and mechanical stirring, is not decomposed; the problemsof decomposition of a traditional hydroxylamine sulfate constant-viscosity agent at high temperature and odor and corrosion are caused by decomposition is solved, and the preparation method is environment-friendly to natural rubber processing plants and downstream natural rubber application plants.

Description

technical field [0001] The invention relates to the technical field of natural rubber processing, in particular to a constant Mooney viscosity natural rubber with stable Mooney viscosity, good rubber consistency, safe processing process, environmental protection and excellent product performance and a preparation method thereof. Background technique [0002] Due to the existence of active groups such as aldehyde groups on the molecular chain of natural rubber, cross-linking and bridging between molecular chains and molecular chains are prone to occur during storage, forming a macromolecular network structure, resulting in an increase in the Mooney viscosity of natural rubber. resulting in gelation. In application, since the viscosity of natural rubber increases during storage, in order to reduce the viscosity of rubber, it must be masticated repeatedly, prolong the mixing time, consume more energy, and more seriously, lead to a decrease in the quality consistency of the prod...

Claims

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Application Information

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IPC IPC(8): C08C19/22C08C19/00
CPCC08C19/00C08C19/22
Inventor 周其彬陈强周景润贾中锋杨乐钱江
Owner 华君橡胶科技(上海)有限公司
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