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Preparation method of hyperbranched multifunctional dispersant

A dispersant, multi-functional technology, applied in the direction of pigment slurry, etc., can solve the problems of unsatisfactory particle stabilization effect, easy desorption, etc., and achieve the effect of storage stability and freeze-thaw stability

Active Publication Date: 2014-12-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The small molecule dispersant is easy to desorb due to the few adsorption points with the particles, and its stabilizing effect on the particles is not ideal

Method used

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  • Preparation method of hyperbranched multifunctional dispersant
  • Preparation method of hyperbranched multifunctional dispersant
  • Preparation method of hyperbranched multifunctional dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve monomer 0.98g maleic anhydride, 1.04g styrene and 0.10g p-vinylbenzyl mercaptan in a beaker containing 40g toluene, stir well until the solid is dissolved, then dissolve 0.23g azobisisobutyronitrile in the beaker Stir in a beaker with 20 g of toluene until the solids are completely dissolved. Add 1 / 3 of the mixed monomer solution and initiator solution to a 100ml four-necked flask with a condenser tube, stir and heat up to 65°C, and after 30 minutes of reaction, start adding the remaining monomer solution and initiator solution dropwise into the reaction solution. After the dropwise addition, the reaction was continued for 24 hours, and 0.2 g of p-toluenesulfonic acid and 1.6 g of methanol were added thereto, and the reaction was continued at 50° C. for 48 hours. After the reaction is completed, cool to room temperature, filter the obtained product with suction, wash with petroleum ether for 3 times, and then dry to obtain a hyperbranched solid dispersant (BPS...

Embodiment 2

[0031]Dissolve monomer 0.98g maleic anhydride, 2.00g methyl methacrylate and 0.30g vinyl benzyl mercaptan in a beaker containing 40g acetone, stir well until the solid dissolves, then add 0.25g azobisisoheptyl Dissolve the diester of nitrile azobisisobutyrate in a beaker containing 20 g of acetone and stir until the solid is completely dissolved. Add 1 / 3 of the mixed monomer solution and initiator solution to a 100ml four-neck flask with a condenser tube, stir and heat up to 70°C, and after 30 minutes of reaction, start adding the remaining monomer solution and initiator solution dropwise into the reaction solution. After the dropwise addition was completed, the reaction was continued for 6 h, and 0.2 g of triethylamine and 1.5 g of n-butanol were added thereto, and the reaction was continued at 80° C. for 8 h. After the reaction is completed, cool to room temperature, filter the obtained product with suction, wash with petroleum ether for 3 times, and then dry to obtain a hy...

Embodiment 3

[0034] Dissolve monomer 0.98g maleic anhydride, 0.86g methacrylic acid and 0.20g p-vinylbenzyl mercaptan in a beaker containing 40g cyclohexanone, stir until the solid dissolves, then add 0.24g benzyl peroxide Acyl was dissolved in a beaker with 20 g of cyclohexanone and stirred until the solid was completely dissolved. Add 1 / 3 of the mixed monomer solution and initiator solution to a 100ml four-neck flask with a condenser tube, stir and heat up to 90°C, after 30 minutes of reaction, start to drop the remaining monomer solution and initiator solution respectively into the reaction solution. After the dropwise addition, the reaction was continued for 2 h, and 0.12 g of 4-(dimethylamino)pyridine and 3.9 g of n-octanol were added thereto, and the reaction was continued at 90° C. for 24 h. After the reaction is completed, cool to room temperature, filter the obtained product with suction, wash with petroleum ether for 3 times, and then dry to obtain a hyperbranched solid dispersa...

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Abstract

The invention discloses a preparation method of a hyperbranched multifunctional dispersant, and belongs to the field of fine chemical engineering. The preparation method comprises the following steps: by taking p-vinyl benzyl mercaptan as a branching monomer and chain transfer agent, carrying out free radical polymerization reaction on polymerizable double-bond hydrophobic monomers and a hydrophilic monomer maleic anhydride in a certain proportion in a solvent under initiation of an initiator; and then, esterifying and modifying polymerization products under action of an esterification catalyst to obtain the hyperbranched multifunctional dispersant. The hyperbranched multifunctional dispersant is suitable for dispersing a plurality of inorganic and organic pigments; and moreover, the prepared pigment is low in paste viscosity, and good in storage stability and freeze-thaw stability. The hyperbranched multifunctional dispersant can be applied to the industries such as paint, textiles and chemical engineering.

Description

technical field [0001] The invention relates to a preparation method of a hyperbranched multifunctional dispersant, which belongs to the field of fine chemicals. Background technique [0002] Dispersant is an important auxiliary agent for particle wet processing. This substance is of great significance for accelerating the wetting speed of particles, improving dispersion efficiency and maintaining good stability of the dispersion system. It is widely used in pigment dispersion, coatings, paints and other industries. Common dispersants are classified according to the length of molecular chains, and mainly include small molecule dispersants and hyperdispersants. Small molecule dispersants are easy to desorb due to their few adsorption points with particles, and their stabilizing effect on particles is not ideal. Hyperdispersants contain multiple anchoring groups and long solvation chains, which have a good dispersion and stabilization effect on particles, and are currently th...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/14C08F220/06C08F222/08C08F212/14C08F8/14C09D17/00
Inventor 付少海田安丽许翠玲王春霞张丽平
Owner JIANGNAN UNIV
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