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Dispersion stabilizer and application thereof

A dispersion stabilizer, unsaturated technology, applied in the direction of coating, pigment slurry, etc., can solve the problems of short efficacy, stickiness, and water-based calcium carbonate pigments cannot be used normally, and achieve the effect of stable and low viscosity

Inactive Publication Date: 2019-09-06
NINGBO JIAHUA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium carbonate minerals do not have a natural flaky or layered structure and cannot be naturally split into small particles. Therefore, in the application process, calcium carbonate particles need to be artificially ground into fine particles as small as possible, that is, less than a few microns, and form water-based carbonic acid. Calcium dispersion, that is, water-based calcium carbonate pigment. In the process of preparing calcium carbonate pigment, dispersant or stabilizer is needed. Its main function is to improve the dispersion rate of pigment particles. Most dispersants or stabilizers on the market have short efficacy. Even in the freshly ground calcium carbonate pigment, the dispersion degree of the pigment particles is only 30%-50%. After standing still for a long time, the viscosity of the pigment increases and exceeds 2000mPa s, which makes the water-based calcium carbonate pigment unable to be used normally. With the extension of time, it will even reach the state of sticking, which is inconvenient to use and needs to be improved

Method used

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  • Dispersion stabilizer and application thereof
  • Dispersion stabilizer and application thereof
  • Dispersion stabilizer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of carboxyl intermediates, as described in the table below

[0028] Table 1

[0029]

[0030] Concrete preparation process is as follows:

[0031] Preparation Example 1: Preparation of Carboxyl Intermediate A1

[0032] 1) Add 20 parts of EO-PO ethylene glycol methoxypolyethylene glycol and 5 parts of hydroquinone as a polymerization inhibitor to the reaction kettle, heat to 80-85°C, and continue the reaction until it is completely molten. Then add 35 parts of carboxyl monomer acrylic acid, and heat up to 100-105°C. After the temperature stabilizes, add 5 parts of initiator p-toluenesulfonic acid, and keep the temperature for 5 hours.

[0033] 2) Cool the temperature to 90°C, add 35 parts of carboxyl monomer acrylic acid after the temperature stabilizes, keep it warm for 30 minutes, and finally lower it to 40°C, which is the carboxyl intermediate A1 of the present invention.

[0034] Preparation Example 2: Preparation of Carboxyl Intermediate A2

[...

Synthetic example 1

[0044] Synthesis Example 1: Synthesis of High Molecular Block Polymer B1

[0045] 1) Add deionized water, 2.5 parts of chain transfer agent mercaptoethanol (accounting for 50% of the total amount of chain transfer agent) and 0.1 part of reducing agent sodium metabisulfite in the reactor, and start heating while stirring. When the temperature reaches 80°C, add 3 parts of initiator tert-butyl hydroperoxide, 10 parts of carboxylic acid intermediate, 6 parts of sulfonic acid monomer sodium styrene sulfonate, 4 parts of phosphate monomer Acrylic acid ethylene glycol ethyl phosphoric acid, 1.9 parts of ammonium / amide monomer acrylamide and the remaining 2.5 parts of chain transfer agent mercaptoethanol (accounting for 50% of the total amount of chain transfer agent) were added dropwise and reacted for 200 minutes.

[0046] 2) After the raw materials are added dropwise, steam is introduced, the temperature is increased to 100° C. and stabilized, then aged for 60 minutes, and finally ...

Synthetic example 2

[0047] Synthesis Example 2: Synthesis of Polymer B2

[0048] The specific operation steps are the same as those in Synthesis Example 1, and the substances and specific contents added sequentially to the synthetic polymer B2 are as described in Table 2 Synthesis Example 2, wherein the aging treatment temperature is 105° C., and the time is 50 minutes.

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Abstract

The invention discloses a dispersion stabilizer. The dispersion stabilizer comprises compound, and the compound is prepared by an acid-base neutralization reaction of a neutralizer and a block copolymer formed by linking an unsaturated carboxylic acid, an unsaturated sulfonic acid and an unsaturated phosphate end to end. The molecular chain of the compound contains a carboxyl group, a sulfonic group and a phosphate group, the compound is a copolymerized polymer electrolyte, and the molecular weight distribution of the compound belongs to a bimodal structure, so the dispersant is multifunctional, that is the mechanical stability of the dispersant is improved, the grinding efficiency is increased, and the viscosity stability of a ground slurry is improved; and the acid-base neutralization reaction makes the compound have a plurality of valence ions, such as a plurality of valence metal cations, and the plurality of valence compounds are combined to form the polymer electrolyte with further optimized properties, such as mechanical stability and viscosity stability of the slurry.

Description

technical field [0001] The present invention relates to a dispersion stabilizer and its application. Background technique [0002] For a long time, water-based calcium carbonate pigments have been widely used in many fields such as paints, coatings, rubber fillers and synthetic resins. Calcium carbonate minerals do not have a natural flaky or layered structure and cannot be naturally split into small particles. Therefore, in the application process, calcium carbonate particles need to be artificially ground into fine particles as small as possible, that is, less than a few microns, and form water-based carbonic acid. Calcium dispersion, that is, water-based calcium carbonate pigment. In the process of preparing calcium carbonate pigment, dispersant or stabilizer is needed. Its main function is to improve the dispersion rate of pigment particles. Most dispersants or stabilizers on the market have short efficacy. Even in the freshly ground calcium carbonate pigment, the dispe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C09D17/00C09D7/65
CPCC08F283/06C09D17/004C09D7/65C08F220/06
Inventor 刘喜林千胜宇葛政台
Owner NINGBO JIAHUA NEW MATERIAL TECH CO LTD
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