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Water-soluble zwitterionic polymer and preparation method thereof

A zwitterionic, water-soluble technology, applied in the field of water-soluble zwitterionic polymers and their preparation, can solve the problems of slow polymer dissolution and increased transportation costs, and achieves weakening of self-aggregation tendency, uniform distribution and good use effect. Effect

Active Publication Date: 2017-03-29
GUANGZHOU TINCI MATERIALS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, polyacrylamide flocculants often require a very high molecular weight to achieve a high flocculation effect. For example, the cationic polyacrylamide used for papermaking sewage as described in CN 102942652 has a molecular weight of 8 to 12 million and an apparent viscosity greater than 40mPa·s, which tends to make the polymer dissolve very slowly
In addition, the product is an aqueous solution, resulting in increased shipping costs

Method used

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  • Water-soluble zwitterionic polymer and preparation method thereof
  • Water-soluble zwitterionic polymer and preparation method thereof
  • Water-soluble zwitterionic polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of a kind of water-soluble zwitterionic polymer of the present embodiment comprises the following steps:

[0029] Add 350g dimethyl diallyl ammonium chloride (60wt% aqueous solution), 200g deionized water, 0.5g ethylenediaminetetra Disodium acetate, start stirring, nitrogen gas 30min. Then, the reaction temperature was raised to 65-70° C., 2 g of isopropanol was added, and the initiator (25 g of 2 wt % ammonium persulfate aqueous solution) and 80 g of acrylic acid were added dropwise at the same time, the time for adding the initiator was 180 min, and the time for adding acrylic acid was 170 min ; Initiator and acrylic acid dropwise, continue to react for 1h. Raise the temperature to 80-85° C., add 15 g of 10 wt % ammonium persulfate aqueous solution, and continue the reaction for 1 h; add deionized water to adjust the solid content to 30 wt %, and cool and discharge.

[0030] Detection method

[0031] The detection method of residual DADMAC in...

Embodiment 2～6

[0033] Based on the ingredients in Example 1, adjust the amount of the ingredients in Example 1. The preparation method is the same as in Example 1, and carry out viscosity, solid content, pH value, and residual monomers for the obtained amphoteric polymer composition. Detection, as shown in Table 1 below:

[0034] The addition amount of each component of table 1 embodiment 1~6

[0035]

[0036] Table 2 The physical and chemical performance detection table of the product obtained in Examples 1 to 6

[0037]

Embodiment 7

[0039] Add 350g dimethyl diallyl ammonium chloride (60wt% aqueous solution), 200g deionized water, 0.5g ethylenedienetri Aminopentaacetic acid pentasodium salt, start stirring, and pass nitrogen gas for 30 minutes. Then, the reaction temperature was raised to 65-70° C., 2 g of isopropanol was added, and 25 g of initiator (2 wt % ammonium persulfate aqueous solution) and 100 g of acrylic acid were added dropwise at the same time, the time for adding the initiator was 150 min, and the time for adding acrylic acid was 160 min , v 1 :v 2 :v 3 =1:1.5:2; the initiator and acrylic acid are added dropwise, and the reaction is continued for 1h. Raise the temperature to 80-85° C., add 15 g of 10 wt % ammonium persulfate aqueous solution, and continue the reaction for 1 h; add deionized water to adjust the solid content to 30 wt %, and cool and discharge.

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Abstract

The invention discloses water-soluble amphoteric polymer and a preparation method thereof. The preparation method is novel, and especially, the preparation method uses a variable-speed anionic monomer adding mode, the monomer conversion rate is improved, and accordingly the monomer residue is lowered, the tendency of self-polymerization of monomers in the polymer is weakened, the distribution of two kinds of monomers in the polymer is more uniform, and the use effect is better in the use process. The preparation method also leads in a residual monomer processing method, and the monomer conversion rate is further improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a water-soluble zwitterionic polymer and a preparation method thereof. Background technique [0002] With the development of my country's economy, water consumption has increased sharply, and at present, my country's directly available water resources are extremely poor. This problem can be solved well through efficient purification of water. In the treatment of water and sewage, the flocculation and sedimentation method is the most widely used, economical and important method. The degree of perfection of the flocculation process directly affects the effect of subsequent treatment. Flocculants are the core of flocculation water treatment technology. There are many types of flocculants. According to their molecular weight, they can be divided into low molecular flocculants and polymer flocculants; according to their properties, they can be divided into inorganic polymer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/02C08F220/06C08F2/38
Inventor 李琳户献雷
Owner GUANGZHOU TINCI MATERIALS TECH