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Double-component PVDC latex for biological rotating disc

A biological turntable and two-component technology, applied in sustainable biological treatment, biological water/sewage treatment, single-component halogenated hydrocarbon artificial filament, etc., can solve unfavorable film formation, unfavorable microbial film formation, large dosage, etc. problems, to achieve the effect of stable structure, reduced impact, and high amount of film hanging

Active Publication Date: 2021-06-25
青海洁神环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can also play a role in bonding, there is a large amount of use, and generally commercially available PVDC latex is generally used as a paint coating material, which often has a high barrier property, but this barrier property is not conducive to the microbial film in the biological environment. The formation of the surface of the turntable, which is not conducive to the formation of film

Method used

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  • Double-component PVDC latex for biological rotating disc
  • Double-component PVDC latex for biological rotating disc
  • Double-component PVDC latex for biological rotating disc

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0044] Preparation of component A:

[0045] The raw materials of component A are as follows: 40 parts of vinylidene chloride, 4 parts of methoxypolyethylene glycol acrylate, 4 parts of methyl methacrylate, 4 parts of glycidyl methacrylate, 50 parts of deionized water, 0.1 parts The compound of SAS and 0.1 part of OP-1 was used as emulsifier, and the compound of 0.04 part of potassium persulfate and 0.02 part of sodium bisulfite was used as initiator.

[0046] (A1) Disperse 10wt% initiator, 5wt% mixed monomer and water, heat up to 50°C, and react at a speed of 300rpm for 2h to obtain a seed emulsion;

[0047] (A2) Slowly add emulsifier, remaining mixed monomers and initiator to the seed emulsion obtained in step (A1), after adding 2 hours, continue to heat up to 65°C, react for 3 hours, cool, and discharge to obtain component A emulsion. Solid content 51.3%;

[0048] Preparation of component B:

[0049] The raw materials of component B are as follows: 40 parts of vinylidene ...

preparation example 2

[0053] Other conditions and steps are the same as in Preparation Example 1, except that 4 parts of methyl methacrylate in components A and B are replaced by a composite of 2 parts of methyl methacrylate and 2 parts of butyl methacrylate. The solid content of the emulsion of component A is 51.0%, and the solid content of the emulsion of component B is 49.7%.

preparation example 3

[0055] Other conditions and steps are the same as in Preparation Example 1, except that 4 parts of acrylic acid in component B are replaced by 3 parts of acrylic acid and 1 part of maleic acid. The solid content of the emulsion of component A is 51.2%, and the solid content of the emulsion of component B is 49.6%.

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Abstract

The invention relates to double-component PVDC latex for a biological rotating disc. A component A comprises the following raw materials in parts by weight: 30-40 parts of vinylidene chloride, 4-7 parts of methoxy polyethylene glycol (methyl) acrylate, 3-5 parts of alkyl (methyl) acrylate, 2-4 parts of glycidyl (methyl) acrylate, 0.1-0.3 parts of an emulsifier and 0.05-0.1 part of an initiator. A component B is prepared from the following raw materials in parts by mass: 30-40 parts of vinylidene chloride, 4-7 parts of methoxy polyethylene glycol (methyl) acrylate, 3-5 parts of alkyl (methyl) acrylate, 3-5 parts of unsaturated carboxylic acid, 0.1-0.3 parts of an emulsifier and 0.05-0.1 parts of an initiator. When the double-component PVDC latex is used, the component A and the component B are sprayed on a three-dimensional net-shaped structure formed by PVDC resin according to a certain mass ratio, and a biological rotating disc material obtained through hot pressing and shaping is stable in structure, good in mechanical strength and high in film forming amount. Compared with latex which is not specially used for a PVDC biological rotating disc, the double-component PVDC latex disclosed by the invention can ensure the strength of the biological rotating disc under the condition of a small dosage.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and in particular relates to a PVDC latex for a two-component biological turntable. Background technique [0002] Biological turntable technology is a kind of biofilm sewage treatment technology, which has the advantages of flexible design, convenient installation, simple operation, low operating cost, no need for aeration, energy saving, and high purification can be obtained in a short biological contact time Effect. The biological turntable assembly is a plurality of discs installed on the rotating shaft after intervals, and each disc is partially immersed in sewage, and the sewage is in contact with the aerobic bacteria attached to the discs for biological treatment. [0003] The disc of the biological turntable is the main component and a key factor affecting the effect of wastewater treatment. The performance of the disc is of great significance. In order for the biological turntable to h...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F214/08C08F220/14C08F220/32C08F2/26C08F2/30D01F6/48D01F1/10C02F3/08D01D5/16D01D10/02D02G1/00D04H3/007D04H3/12
CPCC08F283/065C08F2/26C08F2/30D01F6/48D01F1/10C02F3/082D01D5/16D01D10/02D02G1/00D04H3/007D04H3/12C08F214/08C08F220/14C08F220/325Y02W10/10
Inventor 柴建中柴伟贺左浩
Owner 青海洁神环境科技股份有限公司
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