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A kind of green environmental protection type natural rubber and preparation method thereof

A technology of natural rubber and colloidal particles, which is applied in the field of rubber, can solve the problems of increasing the amount of acid used for coagulation of latex, affecting the working and production environment, and endangering the health of employees. Effect without toxic side effects

Active Publication Date: 2019-07-05
北京天一瑞博科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because ammonia has a strong pungent smell and is corrosive, it seriously affects the working and production environment, endangers the health of employees, pollutes the environment, and will increase the amount of acid used for latex coagulation and increase production costs.

Method used

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  • A kind of green environmental protection type natural rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of green and environment-friendly natural rubber, characterized in that, the preparation method comprises the following steps:

[0037] (1) Collection, preservation and transportation of fresh latex: When collecting fresh latex, keep the forest section, tree body and various utensils clean, and add ammonia-free preservative to the collected fresh latex in time, and replenish it as needed during transportation. Ammonia-free preservative to control the pH value of fresh latex ≥9;

[0038] (2) Purification and dilution of fresh latex: The fresh latex collected in step (1) is filtered to remove impurities and clots, and then enters the centrifugal settler for sedimentation and removal of impurities, and water is added to dilute the fresh latex to control dryness. The glue content is 22%~28%;

[0039] (3) Coagulation of fresh latex: adding a coagulant to the fresh latex after purification and dilution in step (2), and curing for 8h to 24h to obtain coag...

Embodiment 2

[0052] This embodiment is a preferred solution based on Embodiment 1. In this example, the dosage of each raw material of the described ammonia-free preservative is further optimized, and the source and quality of each reagent in this example are the same as those in Example 1.

[0053] The raw materials of the described ammonia-free preservative include sodium hydrogen sulfite, sodium tripolyphosphate, sodium carbonate, sodium silicate pentahydrate, citric acid, and sodium benzoate, and the ratio of the parts by weight of the raw materials is:

[0054] Sodium bisulfite 2—2.5 parts

[0055] 2-4 servings of sodium tripolyphosphate

[0056] 1-2 parts of sodium carbonate

[0057] 6-8 parts of sodium silicate pentahydrate

[0058] 2-3 servings of citric acid

[0059] 1-3 parts of sodium benzoate.

Embodiment 3

[0061] This embodiment is a preferred solution based on Embodiment 1. The processing conditions of the green and environment-friendly natural rubber preparation method described in this example are further refined, the amount of each raw material of the ammonia-free preservative is further optimized, and the sources and quality of each reagent in this example are the same as those in Example 1 are the same.

[0062]A preparation method of green and environment-friendly natural rubber, comprising the following steps:

[0063] (1) Collection, preservation and transportation of fresh latex: When collecting fresh latex, keep the forest section and tree body, glue knife, glue cup, glue tongue, glue scraper, and glue collection bucket clean (the “six cleanliness” of the rubber garden), and Add 20% ammonia-free preservative solution to the collected fresh latex in a timely manner, and pass it through a stainless steel screen with an aperture no larger than 355μm (40 mesh), and reple...

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Abstract

The invention discloses green and environment-friendly natural rubber and a preparation method thereof. The preparation method includes: collecting / preserving and transporting fresh latex, purifying / diluting, solidifying, thinning through pressing / creping through pressing / granulating, and drying, wherein an ammonia-free preservative which comprises sodium hydrogen sulfite, sodium tripolyphosphate,sodium carbonate, sodium silicate pentahydrate, citric acid and sodium benzoate is used in the first step. The preparation method has the advantages that the ammonia-free preservative does not use butyl p-hydroxybenzoate, the butyl p-hydroxybenzoate is replaced by the sodium tripolyphosphate, and accordingly the flora inhibiting effect of the ammonia-free preservative is maintained while the problem that the latex is prone to caking after long-term storage due to the fact that the butyl p-hydroxybenzoate is poor in water solubility; in addition, by reducing the use amount of the sodium carbonate, raw material cost is lowered greatly; the rubber processing process is improved, and acid content in discharged wastewater is reduced by lowering the use amount of formic acid; meanwhile, dryingtemperature in the drying step is lowered, so that energy consumption and waste gas discharge are reduced; rubber color is improved, and originally yellowish-brown rubber becomes dark yellow.

Description

technical field [0001] The invention belongs to the technical field of rubber, in particular to a green and environment-friendly natural rubber and a preparation method thereof. Background technique [0002] Rubber is an important industrial raw material, and it is known as the four major industrial raw materials together with steel, oil and coal. Rubber has a wide range of uses due to its unique high elasticity and good physical and mechanical properties and electrical insulation properties. Therefore, the consumption of rubber is very large. Commonly used rubbers include natural rubber and synthetic rubber. At present, the annual global demand reaches 20 million tons, including 12 million tons of synthetic rubber and 8 million tons of natural rubber. But synthetic rubber cannot replace natural rubber. my country's natural rubber production only accounts for 7% of the world's, while the demand accounts for more than 22% of the world's. [0003] Natural rubber is rubber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/15
CPCC08C1/15
Inventor 陆颖黄桂春纪岩杜日鹏
Owner 北京天一瑞博科技发展有限公司