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Preparation method of star-shaped polymer dispersant, and product and application thereof

A star-shaped polymer and dispersant technology, applied in the direction of pigment slurry, etc., can solve the problems of dispersant anchoring ability and steric hindrance, uncontrollable relative molecular mass, poor dispersion stability of pigment particles, etc., to achieve relative molecular Narrow mass distribution, controllable relative molecular mass, and improved dispersion performance

Active Publication Date: 2020-04-10
常熟世名化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the structure and relative molecular mass of the styrene-maleic anhydride dispersant prepared by the prior art are uncontrollable, and the relative molecular mass distribution is wide, so the anchoring ability and steric hindrance of the dispersant are poor, resulting in poor dispersion stability of the pigment particles
So far, there is no good preparation method to solve these problems

Method used

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  • Preparation method of star-shaped polymer dispersant, and product and application thereof
  • Preparation method of star-shaped polymer dispersant, and product and application thereof
  • Preparation method of star-shaped polymer dispersant, and product and application thereof

Examples

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preparation example Construction

[0034] A preparation method of a star-shaped polymer dispersant, in parts by mass, comprising the steps of:

[0035] S1: Dissolving 136 parts by mass of pentaerythritol in a solvent of 800 to 1000 parts by mass, adding 500 to 800 parts by mass of an initiator and 300 to 500 parts by mass of triethylamine , react at a temperature of 0-30°C for 3-6h, remove the solvent to obtain the initiating monomer;

[0036] S2: Take 100 parts by mass of the initiating monomer prepared in step S1, and 2 to 5 parts by mass of catalyst and 5 to 10 parts by mass of ligand, and 300 to 500 parts by mass 80-120 parts of solvent, 80-120 parts of styrene, and 80-120 parts of maleic anhydride are respectively added to a reaction vessel filled with an inert gas, and reacted at a temperature of 60-90°C for 4- 8h, remove solvent and cool to room temperature, obtain star polymer;

[0037] S3: Take the star polymer of 100 parts by mass obtained in step S2, add a solvent of 300 to 500 parts by mass and a ...

Embodiment 1

[0060] A preparation method of a star-shaped polymer dispersant, in parts by mass, comprising the steps of:

[0061] S1: Dissolve 136 parts by mass of pentaerythritol in 900 parts by mass of toluene, add 800 parts by mass of initiator A1 and 400 parts by mass of triethylamine, and react at a temperature of 10°C 5h, remove solvent and obtain initiation monomer;

[0062] S2: Take 100 parts by mass of the initiator monomer prepared in step S1, 3 parts by mass of CuBr and 6 parts by mass of 2,2'-bipyridine, and 400 parts by mass Toluene, 90 parts by mass of styrene, and 80 parts by mass of maleic anhydride were added to a reaction vessel filled with an inert gas, reacted at 70°C for 7 hours, removed the solvent and cooled to room temperature to obtain star polymer;

[0063] S3: Take 100 parts by mass of the star-shaped polymer prepared in step S2, add 400 parts by mass of toluene and 40 parts by mass of graft modifier B1 and react at a temperature of 95°C for 5 hours , and then...

Embodiment 2

[0065] A preparation method of a star-shaped polymer dispersant, in parts by mass, comprising the steps of:

[0066] S1: Dissolve 136 parts by mass of pentaerythritol in 800 parts by mass of N,N-dimethylformamide, add 500 parts by mass of initiator A2 and 300 parts by mass of Triethylamine was reacted at 0°C for 6h, and the solvent was removed to obtain the initiating monomer;

[0067] S2: get the initiation monomer that the mass fraction that step S1 makes is 100 parts, and the mass fraction is 2 parts of CuCl and the mass fraction is 10 mass fractions of pentamethyldiethylenetriamine, mass fraction is Add 500 parts of N,N-dimethylformamide, 100 parts by mass of styrene, and 120 parts by mass of maleic anhydride into a reaction vessel filled with an inert gas, and react at a temperature of 90°C 4h, remove solvent and cool to room temperature, obtain star polymer;

[0068] S3: Take 100 parts by mass of the star-shaped polymer prepared in step S2, add 500 parts by mass of N,N...

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Abstract

The invention discloses a preparation method of a star-shaped polymer dispersant as well as a product and application of the star-shaped polymer dispersant. The preparation method comprises the following steps: preparing an initiating monomer from pentaerythritol and an initiator, carrying out atom transfer radical polymerization reaction on an initiating monomer, a ligand, styrene and a maleic anhydride monomer, and carrying out ammonium salinization by using a grafting modifier and alkyl halide to obtain the required star-shaped polymer dispersant. The invention provides a preparation method, a product and application of the star-shaped polymer dispersant. The structure and the relative molecular mass of the star-shaped polymer dispersant are controllable; relative molecular mass distribution is narrow, the anchoring capacity and steric hindrance of the dispersant are improved through a star-shaped structure, an ammonium salt dispersant has higher surface activity and can be compounded with a dispersant with a specific structure and applied to the field of water-based color paste, pigment can be stably dispersed, the relative tinting strength is high, and the storage stability ishigh.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method of a star-shaped polymer dispersant and its product and application. Background technique [0002] Dispersing pigment particles in water to form a stable water-based pigment dispersion can effectively avoid pigment dust pollution and improve the coloring strength, vividness and brightness of pigments. The current dispersants mainly realize the dispersion and stable existence of pigment particles through electrostatic repulsion and steric hindrance effects. [0003] Styrene-maleic anhydride copolymer is widely used in many fields due to its excellent performance and low price. The traditional free radical polymerization method is currently the most important method for synthesizing styrene-maleic anhydride copolymer. The traditional free radical polymerization is a random process. The polymerization mechanism of slow initiation, fast growth...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F222/06C08F8/32C09D17/00
CPCC08F212/08C08F222/06C08F8/32C09D17/007C09D17/008C09D17/001
Inventor 吕仕铭胡艺民吕品
Owner 常熟世名化工科技有限公司
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