Novel rubber flocculant and preparation method thereof

Abstract

The invention discloses a novel rubber flocculant, which comprises the following raw materials: polyepichlorohydrin-dimethylamine, water, nitrogen and a water-soluble initiator, and relates to the technical field of rubber flocculants.The copolymer is a novel composite compound, and compared with the existing flocculant, the copolymer has the advantages of high latex polymerization promoting speed, strong effect, low toxicity and the like. The latex stability is destroyed through the cation charge neutralization effect, and rubber particles are separated out; and the additive has an extremely useful effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber flocculants, in particular to a novel rubber flocculant and a preparation method thereof. BACKGROUND

[0002] The yield of natural rubber is limited by planting latitude and cannot meet the demand for high-end products (such as aircraft tires and truck tires). At the same time, Southeast Asia, as the main production area, is facing disease threats (such as South American leaf blight), which may cause supply chain disruptions. Therefore, the development of alternative rubber resources (such as dandelion and yerba mate) has become an important direction, and flocculants play a key role in the extraction process of these new rubber raw materials, which can improve the yield and purity of latex. The "black pollution" caused by waste rubber products (such as tires) and environmental problems (such as microplastic emissions and ecological toxicity) during rubber production have prompted the industry to shift towards green production. The application of flocculants helps to optimize the rubber extraction and processing technology, reduce waste generation, and meet environmental protection requirements. In the extraction of natural rubber or alternative rubber, flocculants can help separate latex particles from other impurities, shorten the washing cycle, and improve the yield and quality of latex. The development of bio-based rubber (such as itaconate rubber and polyester elastomer) requires supporting processing technology. As part of the rubber processing aid, flocculants help improve the performance and processing properties of bio-based rubber, promoting its industrial application. In summary, the development of rubber flocculants is an inevitable choice for the rubber industry to address resource shortages, environmental pressures, and promote sustainable development, aiming to improve the efficiency, quality, and environmental friendliness of rubber production. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a novel rubber flocculant and a preparation method thereof, which solves the problems of resource shortage and high environmental pressure in the existing rubber industry.

[0004] To achieve the above purpose, the present application realizes the following technical scheme: a novel rubber flocculant, comprising the following raw materials: polyepoxy chloropropane dimethylamine, water, nitrogen, and water-soluble initiator.

[0005] A preparation method of a novel rubber flocculant, the preparation method being: S1: dissolving polyepoxy chloropropane dimethylamine in water to prepare a polyepoxy chloropropane dimethylamine aqueous solution; S2: adjusting the pH of the polyepoxy chloropropane dimethylamine aqueous solution to 6.0-8.0, removing oxygen in the system under stirring conditions, then adding a water-soluble initiator, the water-soluble initiator accounting for 0.02-0.2% of the total molar amount of the monomers, initiating polymerization at 30-60 ℃, and the polymerization time being 6-24 h, to obtain a composite salt-tolerant hydrophobic association amphoteric flocculant; S3: when used, the composite salt-tolerant hydrophobic association amphoteric flocculant is diluted with water to a working concentration of 8.5-10.8%.

[0006] The present application provides a new rubber flocculant and a preparation method thereof, which has the following beneficial effects: The chemical synthesis process of the present application uses copolymer as a target, and is synthesized through a designed chemical synthesis process, which greatly shortens the development cycle and saves a large amount of cost, and opens up a new way for future new drug research.

[0007] The copolymer is a new composite compound, which has the advantages of fast and high polymerization latex promotion, strong effect, and low toxicity compared with existing flocculants, and can destroy the latex stability through cationic charge neutralization to realize the precipitation of rubber particles; and is an extremely useful additive. DETAILED DESCRIPTION

[0008] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0009] The present application provides a technical solution: a new rubber flocculant, which comprises the following raw materials: polyepoxy chloropropane dimethylamine, water, nitrogen, and water-soluble initiator. The polyepoxy chloropropane dimethylamine is configured from epoxy chloropropane ECH and dimethylamine N-methyl methylamine DMA.

[0010] A preparation method of a new rubber flocculant, the preparation method is: S1: dissolving the polyepoxy chloropropane dimethylamine in water to configure a polyepoxy chloropropane dimethylamine aqueous solution; S2: adjusting the pH of the polyepoxy chloropropane dimethylamine aqueous solution to 6.0-8.0, removing oxygen in the system under stirring conditions by passing nitrogen, then adding a water-soluble initiator to the system, the water-soluble initiator accounts for 0.02-0.2% of the total molar amount of monomers, and the polymerization is initiated at 30-60 ℃, and the polymerization time is 6-24 h, to obtain a composite salt-tolerant hydrophobic association amphoteric flocculant; S3: when used, the composite salt-tolerant hydrophobic association amphoteric flocculant is diluted with water to a working concentration of 8.5-10.8%.

[0011] The polyepoxy chloropropane dimethylamine is dissolved in water to configure a 50±2% aqueous solution, and in use, different concentrations of aqueous solutions are configured as products for use according to different rubber production brands.

[0012] Those skilled in the art will process the materials in this case sequentially. The specific processing and operation sequence should refer to the following working principle. The detailed methods are well-known in the field. The following mainly introduces the working principle and process.

[0013] Example: Polyepoxychloropropane dimethylamine was dissolved in water to prepare an aqueous solution of polyepoxychloropropane dimethylamine. The pH of the aqueous solution of polyepoxychloropropane dimethylamine was adjusted to 6.0-8.0. Nitrogen gas was purged under stirring to remove oxygen from the system. Then, a water-soluble initiator was added to the system at a molar ratio of 0.02-0.2% of the total molar amount of the monomer. Polymerization was initiated at 30-60 °C for 6-24 h to obtain a composite salt-resistant hydrophobic associative amphoteric flocculant.

[0014] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0015] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel rubber flocculant, characterized in that, It includes the following raw materials: polyepoxychloropropane dimethylamine, water, nitrogen, and water-soluble initiator.

2. A novel method for preparing a rubber flocculant, characterized in that, The preparation method is as follows: S1: Dissolve polyepoxychloropropane dimethylamine in water to prepare an aqueous solution of polyepoxychloropropane dimethylamine; S2: Adjust the pH of the polyepoxychloropropane dimethylamine aqueous solution to 6.0-8.0, purge with nitrogen under stirring to remove oxygen from the system, then add a water-soluble initiator at a molar ratio of 0.02-0.2% of the total monomer molar amount, and initiate polymerization at 30-60 °C for 6-24 h to obtain a composite salt-resistant hydrophobic associative amphoteric flocculant; S3: When applying, dilute the composite salt-resistant hydrophobic associative amphoteric flocculant with water to a working concentration of 8.5-10.8%.