Block polymer dispersant synthesized by reversible addition-fragmentation chain transfer (RAFT) technique

A technology of block polymer and dispersant, which is used in the preparation of dispersant and the field of block polymer dispersant to achieve the effects of controllable molecular weight, high dispersion efficiency and controllable dispersion coefficient

Pending Publication Date: 2017-05-31
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few applications of controllable polym

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A block polymer dispersant synthesized by RAFT technology, its preparation process is as follows:

[0022] a) Add 15 parts of acrylic acid, 8 parts of N-isopropylacrylamide, 6 parts of N-methylolacrylamide, 1.1 parts of potassium persulfate, and 50 parts of water into the reaction device in sequence, stir and dissolve, then cool to 15°C , after evacuating and sealing with nitrogen gas, it is solution A;

[0023] b) Add 4 parts of sodium thiosulfate and 2 parts of water-soluble RAFT reagent α-dithiobenzyl p-benzylidene pyridinium chloride to 10 parts of water, stir to dissolve, and then slowly add to solution A, Stir under the protection of nitrogen, keep at 25 ° C for 3 h to obtain polymer solution B;

[0024] c) adding sodium hydroxide solution to the above polymer solution B to neutralize the pH to 9 to prepare a block polymer dispersant synthesized by RAFT technology.

[0025] Add 0.1 part of the above dispersant solution to 100 parts of ground common glaze slurry ...

Embodiment 2

[0027] A block polymer dispersant synthesized by RAFT technology, its preparation process is as follows:

[0028] a) Add 20 parts of acrylic acid, 14 parts of N-isopropylacrylamide, 8 parts of N-methylolacrylamide, 3 parts of potassium persulfate, and 60 parts of water into the reaction device in sequence, stir and dissolve, and cool to 10°C , after evacuating and sealing with nitrogen gas, it is solution A;

[0029] b) Add 4.8 parts of potassium thiosulfate and 2.8 parts of water-soluble RAFT reagent diethyldithiocarbamate quaternary ammonium salt to 20 parts of water, stir to dissolve, then slowly add to solution A, and stir under nitrogen protection , kept at 15°C for 6 hours to obtain polymer solution B;

[0030] c) adding sodium hydroxide solution to the above polymer solution B to neutralize the pH to 8 to prepare a block polymer dispersant synthesized by RAFT technology.

[0031] Add 0.15 parts of the above-mentioned dispersant solution to 100 parts of ground common g...

Embodiment 3

[0033] A block polymer dispersant synthesized by RAFT technology, its preparation process is as follows:

[0034] a) Add 17 parts of acrylic acid, 11 parts of N-isopropylacrylamide, 8 parts of N-methylolacrylamide, 1.2 parts of potassium persulfate, and 40 parts of water into the reaction device, stir and dissolve, and cool to 15°C , after evacuating and sealing with nitrogen gas, it is solution A;

[0035] b) Dissolve 2.2 parts of potassium thiosulfate, 3 parts of water-soluble RAFT reagent S, S'-bis(α,α'-dimethyl-α"-acetic acid) trithiocarbonate into 15 parts of water, stir to dissolve , and then slowly added to solution A, stirred under nitrogen protection, and kept at 30°C for 4 hours to obtain polymer solution B;

[0036] c) adding sodium hydroxide solution to the above polymer solution B to neutralize the pH to 8 to prepare a block polymer dispersant synthesized by RAFT technology.

[0037] Add 0.2 parts of the above-mentioned dispersant solution to 100 parts of ground...

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PUM

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Abstract

The invention relates to a block polymer dispersant synthesized by a reversible addition-fragmentation chain transfer (RAFT) technique. The prepared block polymer dispersant has adjustable molecular weight and narrow molecular weight distribution. Because the contained anchor groups (sulfo-group and amino group) can be easily adsorbed on the surfaces of glaze particles and exert a dispersion effect, and the water molecules adsorbed by hydration cations in the glaze slurry can be released, the viscosity of the glaze slurry is decreased, and thixotropy cannot occur easily. The invention also provides a preparation method of the block polymer dispersant synthesized by the RAFT technique. The synthesis of the dispersant by waterborne RAFT reagent component can realize industrialization, controllable molecular weight, controllable groups, and high dispersion efficiency. The block polymer dispersant synthesized by the RAFT technique can be used in coating, printing, energy, electronics, ceramics, pigment and filler, and commodity industries.

Description

technical field [0001] The invention relates to a preparation method of a dispersant, in particular to a block polymer dispersant synthesized by a reversible addition-fragmentation chain transfer polymerization RAFT technology, and belongs to the technical field of polymer dispersant synthesis. Background technique [0002] Ceramic dispersant is also called ceramic water reducer. As a part of polymer dispersant, it is widely used in the field of glaze and blank. Since the position, size and quantity of the hydrophobic group and hydrophilic group of the polymer ceramic dispersant can be adjusted, and the molecular structure can be comb-shaped, multi-branched, etc., the surface coverage and encapsulation effect of the polymer ceramic dispersant on the dispersed particles must be It is much stronger than inorganic ceramic dispersants, the dispersion system is more stable, and the dispersion system has wider adaptability. Polymer ceramic dispersants have become a promising class...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F2/38C08F220/06C08F220/54C08F220/58C03C8/14
CPCC03C8/14C08F2/38C08F220/06C08F220/54C08F220/58C08F293/00
Inventor 许钧强谢义鹏康伦国姚东生
Owner UNION FOSHAN CHEM
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