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Polyvinyl chloride brine extraction-resistant membrane for anti-osmosis salt industry

A technology of polyvinyl chloride and impermeability, which is applied in the field of polyvinyl chloride anti-brine extraction and anti-infiltration salt industry membranes, which can solve the problems of film hardening and achieve the effects of improved performance, improved brine resistance and improved service life

Inactive Publication Date: 2012-02-08
TIANJIN TIANSU SCI & TECH GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of anti-permeation salt industry film that can fully improve the brine extraction performance, and solve the problem that the anti-permeation salt industry membrane products are soaked in brine for a long time, so that a large amount of plasticizer in the film is extracted, resulting in The problem of hardening the film, and greatly improving the service life of the salt film, etc. The polyvinyl chloride resistant to brine extraction and anti-permeation film for the salt industry

Method used

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  • Polyvinyl chloride brine extraction-resistant membrane for anti-osmosis salt industry

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The polyvinyl chloride anti-brine anti-permeation film for the salt industry is composed of the following components: (A) 100 parts by weight of polyvinyl chloride resin; (B) dioctyl phthalate 10PHR (according to 100 parts by weight of resin (C) epoxy soybean oil 2PHR; (D) dioctyl adipate 2PHR; (E) heat stabilizer 2PHR; (F) carbon black 1PHR; ( G) 2-hydroxy-4-n-octyloxybenzophenone 0.1PHR; (H) 4,4-isopropylidene bisphenol 0.1PHR; (I) nitrile rubber 1PHR; (J) trimellitic acid- 2 Ethyl-hexyl ester 10PHR. Wherein, wherein, heat stabilizer selects liquid stabilizer and metal soap stabilizer compound use for use, liquid stabilizer selects barium cadmium zinc compound stabilizer for use, metal soap class stabilizer selects barium stearate and zinc stearate compound use for use. The heat stabilizer ratio is: liquid barium cadmium zinc composite stabilizer 　　　 1.5PHR, barium stearate 0.3PHR and zinc stearate 0.2PHR. In this example, in the plasticizer system, part of dioctyl...

Embodiment 2

[0030] The polyvinyl chloride anti-brine anti-permeation film for the salt industry is composed of the following components: (A) 100 parts by weight of polyvinyl chloride resin; (B) dioctyl phthalate 40PHR (according to 100 parts by weight of resin (C) epoxy soybean oil 10PHR; (D) dioctyl adipate 12PHR; (E) heat stabilizer: liquid barium cadmium zinc composite stabilizer 3.5PHR , barium stearate 1PHR and zinc stearate 0.5PHR; (F) carbon black 4PHR; (G) 2-hydroxy-4-methylbenzophenone 0.6PHR; (H) 4,4-isopropylidene bis Phenol 0.8PHR; (I) nitrile rubber 10PHR; (J) trimellitic acid-2 ethyl-hexyl ester 40PHR.

Embodiment 3

[0032] Polyvinyl chloride brine-resistant anti-permeation film for salt industry. The components are shown in Table 1. The film-making process: After weighing the components according to 1 in Table 1, stir with a high-speed mixer for 270s, and discharge at about 92°C. Then, it is internally mixed by a 10,000-horsepower machine, and then fully mixed in two open plastic mixers. After being filtered by the extruder, it is rolled into a film by a four-roller calender. The formed film is drawn, stretched and then cooled. Shaped into the desired product. The physical properties of the tested products are shown in Table 2.

[0033] After weighing each component in 2 in Table 1, produce according to the process method of the above-mentioned embodiment, the obtained polyvinyl chloride brine-resistant anti-permeation salt industry membrane solves the problem that the anti-permeation salt industry membrane product is used for a long time. Soaked in brine, the plasticizer in the film is ...

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Abstract

The invention relates to a polyvinyl chloride brine extraction-resistant membrane for anti-osmosis salt industry. The invention belongs to the technical field of polyvinyl chloride membranes. A polyvinyl chloride brine extraction-resistant membrane for anti-osmosis salt industry is characterized in that the membrane for salt industry comprises the following components by weight: 100 parts of polyvinyl chloride resins, 10-40 parts of dioctyl phthalate, 2-10 parts of epoxidized soybean oil, 2-12 parts of dioctyl adipate, 2-5 parts of heat stabilizers, 1-4 parts of carbon black, 0.1-0.8 parts of 4,4-isopropylidene diphenol, 1-10 parts of butadiene-acrylonitrile rubber, 10-40 parts of trimellitic acid-2 ethyl-hexyl ester. The membrane for anti-osmosis salt industry of the invention has fully improved brine extraction resistance, solves the problem of membrane hardening caused by extraction of a lot of plasticizers during long-term immersion in brine, and greatly increases the service life of the salt membrane.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl chloride membranes, in particular to a polyvinyl chloride membrane for the salt industry that is resistant to brine extraction and anti-permeation. Background technique [0002] At present, the polyvinyl chloride salt film of the known technology is mainly a polyvinyl chloride film made by adding plasticizers, stabilizers, carbon black and other additives to polyvinyl chloride resin, and then processed by stirring, mixing, plasticizing, and calendering. . Among them, the plasticizer is mainly dioctyl phthalate, and dioctyl adipate is used as a low-temperature plasticizer as a supplement to enhance the plasticity of polyvinyl chloride resin. When PVC products are used, the leakage, migration and extraction of plasticizers have aroused people's attention. The use of plastic films in the salt industry is divided into plastic films for skimming fresh water and tartar salt stacks and impermeable sal...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L9/02C08K13/02C08K5/12C08K5/1515C08K5/11C08K3/04C08K5/13
Inventor 张虹汤洪臣袁东风
Owner TIANJIN TIANSU SCI & TECH GROUP
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