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Comb-shaped polycarboxylate as well as synthesis method and application thereof in preparation of dispersing agent

A comb-shaped polycarboxylate, synthesis method technology, applied in application, botanical equipment and method, biocide and other directions, to achieve the effect of low electrical conductivity, meeting performance requirements, good anti-gluing performance

Pending Publication Date: 2022-02-08
东莞市长洲化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole reaction process does not need to add solvent

Method used

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  • Comb-shaped polycarboxylate as well as synthesis method and application thereof in preparation of dispersing agent
  • Comb-shaped polycarboxylate as well as synthesis method and application thereof in preparation of dispersing agent
  • Comb-shaped polycarboxylate as well as synthesis method and application thereof in preparation of dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of synthetic method of comb polycarboxylate, comprises the following steps:

[0036] (1) In terms of parts by mass, 20 parts of styrene, 15 parts of acrylate, 18 parts of acrylic acid and 16 parts of allyl epoxy monomer were added to the reaction kettle protected by nitrogen, and heated to 90 ° C under stirring, Completely dissolve; add 0.7 parts of initiator in batches, stir and react at 90°C for 3 hours; finally add 0.12 parts of chain transfer agent, react at 90°C for 0.3 hours to obtain a copolymer;

[0037] (2) Add 70 parts of amino polyethylene glycol (NH 2 (CH 2 CH 2 O) 20 H), stirring and reacting at 100°C for 2 hours; then cooling down to below 50°C, adding 280 parts of deionized water, stirring evenly, and finally adding 15 parts of ethanolamine to obtain a polycarboxylate liquid product.

[0038] The comb-shaped polycarboxylate prepared in embodiment 1 is named as J 1 . J in this example 1 The solid content is 35.37%, pH=5-8, and the weight aver...

Embodiment 2

[0040] A kind of synthetic method of comb polycarboxylate, comprises the following steps:

[0041] (1) In terms of parts by mass, 25 parts of styrene, 20 parts of acrylate, 18 parts of methacrylic acid and 16 parts of allyl epoxy monomer are added to the reactor under nitrogen protection, and heated to 85 ℃, completely dissolved; adding 0.9 parts of initiator in batches, stirring and reacting at 85 ℃ for 4 hours; finally adding 0.15 parts of chain transfer agent, reacting at 85 ℃ for 0.5 hours to obtain a copolymer;

[0042] (2) Add 30 parts of amino polyethylene glycol (NH 2 (CH 2 CH 2 O) 15 H) and 60 parts of amino polyethylene glycol (NH 2 (CH 2 CH 2 O) 30 H), stirring and reacting at 95°C for 1.5 hours; then cooling down to below 50°C, adding 320 parts of deionized water, stirring evenly, and finally adding 7 parts of sodium hydroxide to obtain a polycarboxylate liquid product.

[0043]The comb-shaped polycarboxylate prepared in embodiment 2 is named as J 2 . J i...

Embodiment 3

[0045] A kind of synthetic method of comb polycarboxylate, comprises the following steps:

[0046] (1) In terms of parts by mass, 20 parts of styrene, 25 parts of acrylate, 16 parts of acrylic acid and 12 parts of allyl epoxy monomer are added to the reaction kettle protected by nitrogen, and heated to 70 ° C under stirring, Completely dissolve; add 1 part of initiator in batches, stir and react at 70°C for 3 hours; finally add 0.1 part of chain transfer agent, react at 70°C for 0.3 hours to obtain a copolymer;

[0047] (2) Add 70 amino polyethylene glycol (NH 2 (CH 2 CH 2 O) 30 H), stirring and reacting at 90°C for 1.5 hours; then cooling down to below 50°C, adding 290 parts of deionized water, stirring evenly, and finally adding 12 parts of potassium hydroxide to obtain a polycarboxylate liquid product.

[0048] The comb-shaped polycarboxylate prepared in embodiment 3 is named as J 3 . J in this example 3 The solid content is 35.32%, pH=5-8, and the weight average mol...

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Abstract

The invention discloses comb-shaped polycarboxylate as well as a synthesis method and application thereof in preparation of a dispersing agent. According to the method, styrene, acrylate, an allyl carboxylic acid monomer and an allyl epoxy monomer are directly subjected to free radical polymerization reaction by adopting a solvent-free 'two-step method' to obtain a copolymer main chain with moderate molecular weight; then, amino polyethylene glycol is added and subjected to a ring-opening grafting reaction with an epoxy group on the main chain to introduce a polyethylene glycol side chain; and finally, a neutralizer is added for a neutralization reaction to obtain a comb-shaped polycarboxylate liquid product. The prepared comb-shaped polycarboxylate is wide in universality in a pesticide water suspending agent and has good anti-creaming performance. The comb-shaped polycarboxylate has excellent particle size control capability in a nano disperse dye, is low in conductivity, and can meet the performance requirements of water-based nano ink.

Description

technical field [0001] The invention belongs to the field of fine chemical additives, and in particular relates to a comb-shaped polycarboxylate, a synthesis method thereof and an application in preparing a dispersant. Background technique [0002] Comb-shaped polycarboxylate is a new type of polymer dispersant that has emerged in recent years. Its structure is characterized by the copolymerization of several different types of unsaturated propylene-based monomers to obtain a main chain containing hydrophilic groups and multiple polymers. A comb-shaped polymer surfactant composed of oxyethylene side chains. This comb-shaped polycarboxylate was first successfully and widely used as a cement water reducing agent. Later, researchers introduced a large number of hydrophobic functional group structures into the main chain of this comb-shaped polycarboxylate to improve its adsorption performance on the surface of hydrophobic substances, and successfully applied it to coal water s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02A01N25/04A01N51/00A01P7/04C09B67/40C09D11/00C09D7/65C04B24/28C04B103/30
CPCC08G81/025A01N25/04A01N51/00C09B67/0082C09B67/0086C09D11/00C09D7/65C04B24/28C04B2103/302
Inventor 周鹏鹏黄亚蔡彩芬
Owner 东莞市长洲化工科技有限公司
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