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Natural rubber latex for sounding balloon and preparation method thereof

A technology of natural rubber latex and sounding balloons, applied in the field of natural rubber latex products, can solve the problems of low performance such as UV aging resistance and cold resistance

Active Publication Date: 2019-09-03
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the existing natural rubber latex vulcanized rubber film has low tear resistance, ozone aging resistance, ultraviolet aging resistance, and cold resistance.

Method used

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  • Natural rubber latex for sounding balloon and preparation method thereof

Examples

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preparation example Construction

[0037] The preparation method of the natural rubber latex used in the air-sounding balloon of the present invention mixes the concentrated natural rubber latex of the above-mentioned content with the raw materials of lysozyme, ammonia and phospholipid.

[0038] The feeding method of mixing is: adding lysozyme to the concentrated natural rubber latex, and adding ammonia and phospholipid after waiting for 5-200 minutes.

[0039] Certainly also comprise the step of preparing above-mentioned concentrated natural rubber latex. The preparation of concentrated natural latex has been described previously.

[0040] What is not mentioned above is applicable to the prior art.

Embodiment 1

[0042] (a) Weigh 10 parts of calcium hydroxide and dissolve it in deionized water to prepare an aqueous solution with a mass fraction of 2%. spare;

[0043] (b) Weigh 2.4 parts of lysozyme and dissolve in deionized water to prepare an aqueous solution with a mass fraction of 10%. spare;

[0044] (c) Weigh 6 parts of water-soluble phospholipids and dissolve them in deionized water to prepare an aqueous solution with a mass fraction of 10%. spare;

[0045] Get 5000 parts of total solid mass fraction and be 25% fresh latex, add the calcium hydroxide aqueous solution described in (a), stir 1 hour, stand still and centrifuge for 6-8 hours, obtain the concentrated natural latex that total solid mass fraction is 60% . Then get 2000 parts of concentrated latex just centrifuged out, add the lysozyme aqueous solution described in (b), stop after 50-100 minutes, add the phospholipid aqueous solution described in (c), add 24 parts of ammoniacal liquor simultaneously (ammonia content i...

Embodiment 2

[0047] (a) Weigh 5 parts of calcium hydroxide and dissolve it in deionized water to prepare an aqueous solution with a mass fraction of 2%. spare;

[0048] (b) Weigh 2.4 parts of lysozyme and dissolve in deionized water to prepare an aqueous solution with a mass fraction of 10%. spare;

[0049] (c) Weigh 6 parts of water-soluble phospholipids and dissolve them in deionized water to prepare an aqueous solution with a mass fraction of 10%. spare;

[0050] Get 5000 parts of fresh latex with a total solid mass fraction of 25%, add the calcium hydroxide aqueous solution described in (a), stir for 1 hour, and leave it still for 6-8 hours to centrifuge to obtain a concentrated natural latex with a total solid mass fraction of 60%. latex. Then get 2000 parts of concentrated latex just centrifuged out, add the lysozyme aqueous solution described in (b), stop after 150-200 minutes, add the phospholipid aqueous solution described in (c), add 16 parts of ammoniacal liquor simultaneous...

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Abstract

The invention discloses a natural latex for weather balloons and a preparation method thereof. The natural latex comprises concentrated natural latex accounting for 55 to 65 wt% of total solid, lysozyme accounting for 0.05 to 0.3 wt% of concentrated natural latex, ammonia accounting for 0.1 to 0.4 wt% of concentrated natural latex, and phospholipid accounting for 0.2 to 0.8 wt% of concentrated natural latex. Lysozyme is used to inhibit bacterial reproduction. When the content of ammonia in the natural latex is less than 0.2%, the natural latex still has a low volatile fatty acid value. Phospholipid can absorb on the surface of rubber particles to adjust the charges on the surface of rubber particles, the stability of natural latex can be maintained, and the mechanical stability of natural latex is improved. Calcium hydroxide is added into concentrated natural latex to carry out reactions with cane sugar (a non-rubber material) in natural latex to form calcium saccharate; thus the content of cane sugar in natural latex is reduced effectively, the glass-transition temperature of natural latex vulcanized film is reduced therefore, and the cold resistant property of the film is enhanced.

Description

technical field [0001] The invention relates to the technical field of natural rubber latex products, in particular to natural rubber latex for air exploration balloons and a preparation method thereof. Background technique [0002] Sounding balloons are mainly used to detect meteorological elements such as pressure, temperature, humidity, wind speed, and wind direction in the stratosphere of the atmosphere, so they are also called weather balloons. Sounding balloons have low investment, low cost, quick results, relatively large load capacity, long flight time, stable attitude of carrying instruments, and high accuracy of observation data. Although more advanced tools such as sounding rockets, weather radars, and weather satellites have been widely used, sounding balloons are still an indispensable tool in meteorological research. [0003] In order to accurately collect meteorological data in the atmosphere, the sounding balloon must have a higher sounding altitude and a lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/02C08K3/28C08K5/521
Inventor 刘宏超王启方余和平吕明哲李普旺
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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