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Production method of ammonia-free natural concentrated latex

A production method and technology of concentrated rubber, applied in the field of rubber processing, can solve the problems affecting the quality of concentrated latex products, large equipment investment, difficult operation, etc., and achieve the effect of low cost, stable product quality and good stability

Active Publication Date: 2019-02-22
昌江桦达乳胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process involves the early stability of fresh latex, otherwise it will have a significant impact on the stability of concentrated natural latex. The solution is often to use more than 0.7% high ammonia as a preservative, and use conventional surfactants to Reach the purpose of stable and early preservation of natural fresh latex, but there are problems such as high ammonia in the above-mentioned scheme, large pollution, high cost, difficult operation, large equipment investment, and any problem in the operation steps will affect the product quality of concentrated latex, especially stability and product performance

Method used

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  • Production method of ammonia-free natural concentrated latex

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Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 provides a kind of production method of ammonia-free natural concentrated latex, comprises the steps:

[0045] (1) Get 100kg natural latex, add the potassium laurate of natural latex 0.01wt% and carry out stabilizing treatment, then add the rubber vulcanization accelerator of natural fresh latex 0.03wt% and the zinc oxide of natural fresh latex 0.03wt%, stirring and mixing 10min , then adjust the pH value of the system to 10 with an alkaline stabilizer, and let it stand for 24 hours;

[0046] (2) the above-mentioned system is centrifugally concentrated and added potassium laurate of 0.05wt% of natural fresh latex, the described vulcanization accelerator of 0.03wt% of natural fresh latex and the described zinc oxide of 0.03wt% of natural fresh latex, stirring and mixing;

[0047] (3) Stability test is carried out to above-mentioned system, when its mechanical stability reaches 250 seconds, add 9g chemical stabilizer and preserve, can obtain the natural conce...

Embodiment 2

[0050] Embodiment 2 provides a kind of production method of ammonia-free natural concentrated latex, comprises the steps:

[0051] (1) Get 100kg natural fresh latex, add the potassium laurate of natural fresh latex 0.01wt% and carry out stabilizing treatment, add the rubber vulcanization accelerator of natural fresh latex 0.01wt% and the zinc oxide of natural fresh latex 0.01wt%, stirring and mixing 10min , then adjust the pH value of the system to 10 with an alkaline stabilizer, and let it stand for 24 hours;

[0052] (2) the above-mentioned system is centrifugally concentrated and added potassium laurate of 0.02wt% of natural fresh latex, the described vulcanization accelerator of 0.02wt% of natural fresh latex and the described zinc oxide of 0.02wt% of natural fresh latex, stirring and mixing;

[0053] (3) Stability test is carried out to above-mentioned system, when its mechanical stability reaches 300 seconds, add 9g chemical stabilizer and preserve, can obtain the natura...

Embodiment 3

[0056] Embodiment 3 provides a kind of production method of ammonia-free natural concentrated latex, comprises the steps:

[0057] (1) Get 100kg natural fresh latex, add the potassium laurate of natural fresh latex 0.01wt% and carry out stabilizing treatment, add the rubber vulcanization accelerator of natural fresh latex 0.15wt% and the zinc oxide of natural fresh latex 0.15wt%, stir and mix 10min , then adjust the pH value of the system to 10 with an alkaline stabilizer, and let it stand for 24 hours;

[0058] (2) the above-mentioned system is centrifugally concentrated and added potassium laurate of 0.07wt% of natural fresh latex, the described vulcanization accelerator of 0.05wt% of natural fresh latex and the described zinc oxide of 0.05wt% of natural fresh latex, stirring and mixing;

[0059] (3) Stability test is carried out to above-mentioned system, when its mechanical stability reaches 300 seconds, add 9g chemical stabilizer and preserve, can obtain the natural conce...

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Abstract

The invention relates to the field of rubber processing, in particular to a production method of ammonia-free natural concentrated latex. The production method comprises the following steps: step (1).stabilizing natural fresh latex by using a surfactant, adding a rubber vulcanization accelerator accounting for 0.01-0.15wt% of the natural fresh latex and zinc oxide accounting for 0.01-0.12wt% of the natural fresh latex, stirring and mixing for 10min, then adjusting the pH of the system by using an alkaline stabilizer, and allowing to stand for 12 to 36 hours; step (2). concentrating the systemby centrifuging, and adding the surfactant, the vulcanization accelerator and the zinc oxide, stirring and mixing; and step (3). testing the stability of the system, and adding a chemical stabilizerfor storage when the mechanical stability of the system reaches 250 to 300 seconds, thereby obtaining the ammonia-free natural concentrated latex.

Description

technical field [0001] The invention relates to the field of rubber processing, in particular to a production method of ammonia-free natural concentrated latex. Background technique [0002] Natural rubber refers to a polymer material naturally synthesized by the Brasilian Hevea tree. According to the process requirements, it is divided into natural rubber raw rubber and concentrated natural latex. The natural latex collected directly from the rubber tree is called fresh latex, which is a natural macromolecular emulsion formed by dispersing rubber particles in the water phase (ie whey). With the different strains and ages of rubber trees, as well as changes in planting environment factors such as seasons and climates, there are large differences in the total solid content of fresh natural rubber latex, generally between 20% and 45%. In fresh natural rubber latex, there are also a large amount of non-rubber substances, the content of which is equivalent to 5% of the total ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C1/075
CPCC08C1/075
Inventor 李兰桂金培全
Owner 昌江桦达乳胶制品有限公司
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