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Star-shaped polyurethane thickening agent with anion-cation zwitterionic nuclei, and preparation method thereof

A polyurethane thickener and ionic core technology, which is applied in the field of star polyurethane thickener and its preparation, can solve the problems that the thickener cannot be fully dissolved or dispersed, affects product quality and use effect, and is difficult to control the product structure. , to achieve the effect of rich structure, short cycle and good thickening

Active Publication Date: 2021-06-15
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation of semi-blocked monofunctional monomers, due to the lack of selectivity in the reaction between groups, it is difficult to control the structure of the product
At the same time, due to the unavoidable presence of a certain amount of cetyl alcohol double-capped structure and free cetyl alcohol in the product structure, the thickener cannot be fully dissolved or dispersed in the thickening system, which affects product quality and use. Effect
In addition, the reaction system is very viscous in the middle and late stages of the reaction, the reaction is difficult to control, and the process is complicated and the cycle is long, which is not convenient for organizing large-scale production.

Method used

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  • Star-shaped polyurethane thickening agent with anion-cation zwitterionic nuclei, and preparation method thereof

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preparation example Construction

[0059] The present invention provides a kind of preparation method of the star-shaped polyurethane thickener with anion-cation zwitterionic nucleus on the one hand, described method comprises the following steps:

[0060] (1) Preparation of raw materials: the raw materials contain polymerized monomers, organic solvents, polymerization catalysts and emulsifiers; wherein, the polymerized monomers include diisocyanate I, diisocyanate II, polymethylol amino acid and polyether diol mono Alkyl esters;

[0061] Diisocyanate I is isophorone diisocyanate or 1,6-hexamethylene diisocyanate;

[0062] Diisocyanate II is isophorone diisocyanate;

[0063] The polymethylolamino acid is one of trimethylolaminopropanesulfonic acid, trimethylolaminoethanesulfonic acid and trimethylolaminoacetic acid;

[0064] Polyether glycol monoalkyl ester is one of polyethylene glycol monoalkyl esters with a water content not higher than 2‰, wherein the polyethylene glycol monoalkyl ester has a chemical for...

Embodiment 1

[0104] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;

[0105] (2) Preparation of zwitterionic core: react diisocyanate I with polymethylol amino acid and some organic solvents to prepare a multifunctional chain extender for star-shaped polyurethane thickeners with anionic and cationic zwitterionic cores;

[0106] (2.1) Put diisocyanate I and a total amount of 37.5% organic solvent into the reactor, and cool down to -2.5°C;

[0107] (2.2) Within 115 minutes, slowly add polymethylol amino acid, and control the temperature of the reaction system to -2.5°C;

[0108] (2.3) Maintain the temperature of the reaction system at -2.5°C and keep it warm for 22.5 minutes to prepare a multifunctional chain extender for a star-shaped polyurethane thickener with an anion and cation zwitterionic core;

[0109] (3) Preparation of active branched arms: react diisocyanate II with polyether diol monoalkyl ester, some organi...

Embodiment 2

[0121] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;

[0122] (2) Preparation of zwitterionic core: react diisocyanate I with polymethylol amino acid and some organic solvents to prepare a multifunctional chain extender for star-shaped polyurethane thickeners with anionic and cationic zwitterionic cores;

[0123] (2.1) Put diisocyanate I and a total amount of 32.5% organic solvent into the reactor, and cool down to 0°C;

[0124] (2.2) Slowly add polymethylol amino acid within 115 minutes, and control the temperature of the reaction system to 0°C;

[0125] (2.3) Maintain the temperature of the reaction system at 0°C and keep it warm for 32.5 minutes to prepare a multifunctional chain extender for a star-shaped polyurethane thickener with an anion and cation zwitterionic core;

[0126] (3) Preparation of active branched arms: react diisocyanate II with polyether diol monoalkyl ester, some organic solvents...

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Abstract

The invention relates to an associative polyurethane thickening agent used in the processing fields of water-based coatings, textile printing, water-based resin coatings and the like, and discloses a star-shaped polyurethane thickening agent with anion-cation zwitterionic nuclei, and a preparation method thereof. The method comprises the following steps: (1) raw material preparation; (2) zwitterionic nucleus preparation; (3) active branched arm preparation; (4) star chain extension; and (5) finished product formation. According to the method, polyether glycol monoalkyl ester is subjected to chain extension by adopting a multifunctional chain extender with a tertiary amine group and a sulfonic group at the same time, and anionic and cationic groups with different ionic properties are introduced into a thickener molecule at the same time, so that the product has better acid resistance and alkali resistance, certain anti-electrolyte performance is given to the product, the application range is wider, and the performance is better.

Description

technical field [0001] The invention relates to an associative polyurethane thickener used in the processing fields of water-based paint, textile printing, water-based resin coating, etc., in particular to a star-shaped polyurethane thickener with an anion and a cation zwitterion core and a preparation method thereof. Background technique [0002] Associative polyurethane thickeners have been widely used in water-based coatings, textile printing, water-based resin coatings and other fields due to their advantages of good leveling, stable viscosity, and good overall feel. Common polyurethane thickeners are basically nonionic structures, and anionic polyurethane thickeners with linear or comb structures have developed rapidly in recent years. However, the preparation methods and products of ionic, especially cationic and zwitterionic, star-shaped polyurethane thickeners are seldom reported. Generally speaking, the molecules of nonionic polyurethane thickeners lack strong hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/28C08G18/34
CPCC08G18/755C08G18/73C08G18/722C08G18/283C08G18/34
Inventor 倪丽杰权衡徐振明陈学俊余祖光王佳肖力卫增峰
Owner WUHAN TEXTILE UNIV