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A solvent-based block polymer dispersant

A polymer dispersant and block polymer technology, which is applied in the field of new structure pigment polymer dispersant and its preparation, can solve the problem that it is difficult to precisely control the monomer distribution, cannot prepare block copolymers, and can be freed by free radical polymerization. To solve problems such as low degree of control, to achieve the effect of shortening grinding time, high product purity, and preventing pigment flocculation and precipitation

Active Publication Date: 2015-08-19
NANTONG HANTAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The controllability of traditional free radical polymerization is very low, it is difficult to precisely control the distribution of monomers in the polymer chain, and it is impossible to prepare block copolymers

Method used

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  • A solvent-based block polymer dispersant
  • A solvent-based block polymer dispersant
  • A solvent-based block polymer dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A solvent-based block polymer dispersant, the molecular chain of the dispersant includes an anchor segment and a solvation segment, and the structural formula is as follows:

[0018]

[0019] Among them, X1, X2, X3, X4, X5 are H; Y1 is a nitrogen-containing aromatic ring; Y2 is a C1-C10 alkyl group or a hydroxyl-containing alkyl group or a mixture; Y3 is a phenyl group or a nitrile group; R1, R2 It is a C1-C10 alkyl group, the anchor segment is part a and b in the molecular formula, and the solvating segment is part c, d and e in the molecular formula. n1=1, n2=1, a=1, b=1, c=5, d=1, e=5, the anchor segment is composed of homopolymer or copolymer of nitrogen-containing vinyl monomer, its molecular weight It is 105 g / mol, and the mass percentage in the polymer is 2%. The solvating segment is composed of a homopolymer or copolymer of nitrogen-free vinyl monomer, its molecular weight is 105 g / mol, and its mass percentage in the polymer is 50%. At 60-90 degrees Celsius...

Embodiment 2

[0021] A solvent-based block polymer dispersant, characterized in that: the molecular chain of the dispersant includes an anchor segment and a solvation segment, and the structural formula is as follows:

[0022]

[0023]Among them, X1, X2, X3, X4, X5 are CH3; Y1 is nitrogen-containing aromatic ring; Y2 is C1-C10 alkyl or hydroxyl-containing alkyl or mixture; Y3 is phenyl, nitrile; R1, R2 It is a C1-C10 alkyl group, the anchor segment is part a and b in the molecular formula, and the solvating segment is part c, d and e in the molecular formula. n1=2, n2=4, a=1~100, b=30, c=10, d=5, e=8. The anchor segment is composed of homopolymer or copolymer of nitrogen-containing vinyl monomer, its molecular weight is 105-10000 g / mol, and its mass percentage in the polymer is 50%. The solvated segment is composed of a nitrogen-free vinyl monomer homopolymer or copolymer, with a molecular weight of 20,000 g / mol and a mass percentage of 98% in the polymer. At 90 degrees Celsius, add an...

Embodiment 3

[0025] A solvent-based block polymer dispersant, the molecular chain includes an anchor segment and a solvation segment, and the structural formula is as follows:

[0026]

[0027] Among them, X1, X2, X3, X4, X5 are CH3; Y1 is nitrogen-containing aromatic ring; Y2 is C1-C10 alkyl or hydroxyl-containing alkyl or mixture; Y3 is phenyl, nitrile; R1, R2 It is a C1-C10 alkyl group, the anchor segment is part a and b in the molecular formula, and the solvating segment is part c, d and e in the molecular formula. n1=3, n2=5, a=50, b=50, c=30, d=30, e=10. The anchor segment is composed of a homopolymer or copolymer of nitrogen-containing vinyl monomers, its molecular weight is 10,000 g / mol, and its mass percentage in the polymer is 50%. The solvated segment of the polymer is composed of a homopolymer or copolymer of nitrogen-free vinyl monomers, its molecular weight is 20,000 g / mol, and its mass percentage in the polymer is 98%. At 60-90 degrees Celsius, add anchoring segment mon...

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Abstract

The invention relates to a solvent type block polymer dispersant and a preparation method thereof, the molecular chain of the dispersant comprises an anchoring chain segment and a solvation chain segment, and has a structural formula shown in the specification. The solvent type block polymer dispersant fundamentally solves the defects of traditional dispersants, the molecular chain of the dispersant comprises the anchoring chain segment and the solvation chain segment, a homopolymer or copolymer of vinyl pyridine, vinyl imidazole, amino acrylate and other nitrogen-containing vinyl monomers is used as the pigment anchoring chain segment, a homopolymer or copolymer of nitrogen-free vinyl monomer such as acrylate, acrylonitrile and styrene is used as the solvation chain segment, and pigment flocculation and sedimentation during storage can be prevented.

Description

technical field [0001] The invention relates to a dispersant, in particular to a pigment polymer dispersant with a novel structure and a preparation method thereof. Background technique [0002] Ultrafine pigment particles have a large surface area and high surface energy, but they belong to a thermodynamically unstable system. When dispersed in a medium, they are prone to agglomeration. If they are used directly, the application performance of the pigment will be seriously lost, such as hiding power, coloring Strength, transparency. In order to obtain a uniform and stable dispersion system, give full play to the performance of the pigment, and facilitate construction, it is usually necessary to add a dispersant to the pigment dispersion system. Traditional small-molecule dispersants have a certain dispersion and stabilization effect on solid particles in the dispersion medium, but due to their weak binding force with pigment particles, the adsorption on the surface of pigm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/10
Inventor 杨伦
Owner NANTONG HANTAI CHEM
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