A kind of natural fresh latex ammonia-free preservative

A fresh latex, natural technology, applied in the field of natural fresh latex ammonia-free preservatives, can solve the problems of affecting the stability and vulcanization performance of latex, affecting product safety, environmental pollution, etc., achieving good preservation effect, low cost of raw materials, and fatty acid value. low effect

Active Publication Date: 2021-04-13
RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the massive harvesting of high-yielding clonal gum trees, the use of ethephon to stimulate production increase, and the modern rubber industry's requirements for mechanization, continuity, and automation, the traditional ammonia and ammonia composite storage system can no longer meet the requirements of modern rubber manufacturing. At the same time, due to the volatility and irritation of ammonia, it causes serious environmental pollution. TT has the risk of generating nitrosamines. Its existence affects the safety of products, and ZnO will affect the stability and vulcanization performance of latex. With the strengthening of national environmental protection, in the long run, the ammonia storage system will be eliminated, so the research and development of efficient and economical ammonia-free storage system has become an inevitable trend in the development of the natural rubber industry

Method used

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  • A kind of natural fresh latex ammonia-free preservative
  • A kind of natural fresh latex ammonia-free preservative
  • A kind of natural fresh latex ammonia-free preservative

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 provides a method for preserving natural fresh latex without ammonia, which mainly includes the steps of: respectively configuring the bactericide and the alkaline stabilizer in the preservation system into a 10wt% aqueous solution; 0.1wt% alkaline stabilizer solution, add 0.1wt% bactericide by natural latex weight after the fresh latex is taken back to the rubber recycling station (that is, add the fungicide after about 8 to 9 hours after adding the stabilizer), and fully stir and mix After standing still for storage, the volatile fatty acid value of natural rubber latex is regularly tested.

[0048] The bactericide consists of equal weight of 2-bromo-2-nitro 1,3-propanediol (CAS No.: 52-51-7), sodium dehydroacetate, BHT, Casson, DMDMH, BIT and sodium tripolyphosphate Composition; The alkaline stabilizer is disodium hydrogen phosphate.

Embodiment 2

[0050] Embodiment 2 provides a method for preserving natural fresh latex without ammonia, which mainly includes the following steps: configuring the alkaline stabilizer in the preservation system into a 10wt% aqueous solution, adding 0.1wt% of natural latex weight in the rubber bucket in advance in the fresh natural latex Fungicide solid, add 0.1wt% alkaline stabilizer of natural latex weight after the fresh latex is brought back to the rubber recycling station (i.e. add the stabilizer about 8 to 9 hours after adding the fungicide), fully stir and mix and then put it aside for storage , and regularly detect the volatile fatty acid value and viscosity value of natural rubber latex.

[0051] The bactericide consists of equal weight of 2-bromo-2-nitro 1,3-propanediol (CAS No.: 52-51-7), sodium dehydroacetate, BHT, Casson, DMDMH, BIT and sodium tripolyphosphate Composition; The alkaline stabilizer is disodium hydrogen phosphate.

Embodiment 3

[0053] Embodiment 3 provides the method for preserving natural fresh latex without ammonia, which mainly includes the following steps: respectively configuring the bactericide and alkaline stabilizer in the preservation system into a 10wt% aqueous solution, adding the weight of natural latex in the rubber barrel in advance in the fresh natural latex 0.12wt% fungicide, add 0.1wt% alkaline stabilizer by weight of natural latex after the fresh latex is taken back to the rubber recycling station (i.e. add stabilizer about 8 to 9 hours after adding the fungicide), mix well and shake well After standing still for storage, the volatile fatty acid value and viscosity value of natural rubber latex are regularly tested.

[0054] The bactericide consists of equal weight of 2-bromo-2-nitro 1,3-propanediol (CAS No.: 52-51-7), sodium dehydroacetate, BHT, Casson, DMDMH, BIT and sodium tripolyphosphate Composition; The alkaline stabilizer is disodium hydrogen phosphate.

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Abstract

The invention relates to the technical field of primary processing of natural rubber, in particular to a natural fresh latex ammonia-free preservative. Aiming at the pollution problem of ammonia and ammonia compound preservatives, the present invention is an oxidative fungicide screened from a large amount of solid, water-soluble and non-volatile broad-spectrum fungicides, and is preserved by compounding with an alkaline stabilizer Preservation system for natural rubber latex. This new type of storage system has the characteristics of good storage effect, low cost, no ammonia, no volatilization, no irritation, easy to dissolve in water, and convenient use. The aging resistance is significantly improved. In addition, it can also be applied to early storage during the preparation of ammonia-free concentrated latex, and the overall cost is lower than that of the currently used ammonia and TT / ZnO systems.

Description

technical field [0001] The invention relates to the technical field of primary processing of natural rubber, in particular to a natural fresh latex ammonia-free preservative. 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 is also a large amount of non-rubber substances, and its content is equivalent to 5% of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/06C08L7/02C08K13/02C08K3/22C08K3/06C08K5/09C08K5/32C08K5/053
CPCC08C1/06C08K3/06C08K3/22C08K5/053C08K5/09C08K5/32C08K13/02C08L7/02
Inventor 赵立广桂红星丁丽黎燕飞李艺璇黄红海李建伟
Owner RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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