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Polyurethane thickener compound with mixed side long-chain alkyl groups and preparation method thereof

A polyurethane thickener and long-chain alkyl technology, which is applied in the field of polyurethane thickener compound and its preparation, can solve the problem that the thickener cannot be fully dissolved or dispersed, affects product quality and use effect, and is inconvenient to organize large-scale Production and other problems, to achieve the effect of enriching thickening, reducing critical association concentration, and improving integrity

Active Publication Date: 2022-06-17
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 later stages of the reaction, and the reaction is difficult to control, making it difficult to organize large-scale production.

Method used

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  • Polyurethane thickener compound with mixed side long-chain alkyl groups and preparation method thereof
  • Polyurethane thickener compound with mixed side long-chain alkyl groups and preparation method thereof
  • Polyurethane thickener compound with mixed side long-chain alkyl groups and preparation method thereof

Examples

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preparation example Construction

[0057] One aspect of the present invention provides a method for preparing a polyurethane thickener compound with mixed pendant long-chain alkyl groups, the method comprising the following steps

[0058] (1) Preparation of raw materials: the raw materials contain polymerized monomers, solvents and auxiliary agents; wherein, the polymerized monomers include diisocyanate, polyethylene glycol, single-ended dihydroxy aliphatic diols and higher aliphatic alcohols; the solvent is an organic solvent; The auxiliary agent is a polymerization catalyst;

[0059] Diisocyanate is a kind of in isophorone diisocyanate and hexamethylene diisocyanate;

[0060] Polyethylene glycol is a kind of polyethylene glycol with a moisture content of not higher than 2‰ and a molecular weight of 4000-8000;

[0061] Single-ended dihydroxy aliphatic diol is 1,2-C 6~12 2 of the diols and 2 of the 1,2-C 6~12 The difference in carbon chain length between the diols is 3 to 6, and the two types of 1,2-C 6~12 ...

Embodiment 1

[0104] The preparation process of high-concentration polyurethane thickener S1 with mixed side long-chain alkyl groups is as follows:

[0105] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;

[0106] (2) prepolymerization: carry out prepolymerization reaction of polyethylene glycol with diisocyanate, polymerization catalyst and part of organic solvent to obtain polyurethane thickener prepolymer with mixed side long-chain alkyl groups;

[0107] (2.1) drop the organic solvent of diisocyanate and total amount 25% into reactor, be warming up to 72 ℃;

[0108] (2.2) in 50min, slowly drop into polyethylene glycol and maintain stirring, control reaction system temperature to be 72 ℃;

[0109] (2.3) after maintaining the temperature of the reaction system at 72°C and maintaining the reaction for 50min, drop into the polymerization catalyst at a uniform speed within 12min;

[0110] (2.4) heating up and controllin...

Embodiment 2

[0142] The preparation process of the high-concentration polyurethane thickener S1 with mixed pendant long-chain alkyl groups is the same as that of Example 1.

[0143] The preparation process of high-concentration polyurethane thickener S3 with mixed side long-chain alkyl groups is as follows:

[0144] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;

[0145] (2) prepolymerization: carry out prepolymerization reaction of polyethylene glycol with diisocyanate, polymerization catalyst and part of organic solvent to obtain polyurethane thickener prepolymer with mixed side long-chain alkyl groups;

[0146] (2.1) drop the organic solvent of diisocyanate and total amount 30% into reactor, be warming up to 78 ℃;

[0147] (2.2) in 58min, slowly drop into polyethylene glycol and maintain stirring, control reaction system temperature to be 78 ℃;

[0148] (2.3) after maintaining the temperature of the reaction syst...

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Abstract

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 polyurethane thickener compound with mixed side long-chain alkyl groups and a preparation method thereof. The method includes the following steps: raw material preparation; prepolymerization; chain extension; capping; concentration; compounding. The method has strong controllability and smooth process. In the present invention, the long-chain alkyl groups with different carbon lengths achieve differential distribution on the side of the polyether polyurethane polymer skeleton, and the effective thickening molecular structure is also diversified; through product compounding, the thickness of the thickener molecule is The side chain structure is more abundant. By inhibiting the intramolecular association of thickeners and strengthening their intermolecular associations, their thickening ability, rheology and washability are improved.

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 and the like, in particular to a polyurethane thickener compound with mixed side long-chain alkyl groups and a preparation method thereof. Background technique [0002] Associative polyurethane thickeners are widely used in water-based coatings, textile printing, water-based resin coatings and other fields due to their advantages of good leveling, strong viscosity stability, and good overall hand feel. However, the existence of associative polyurethane thickeners ① the enhancement of the intermolecular association ability of the thickener is also accompanied by its obvious intramolecular association, which leads to the obvious deterioration of its thickening ability, washability, and thickening speed; ② The thickening system is prone to the problem of water analysis; (3) the intermolecular associ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/48C08G18/10C08G18/28C09D7/43D06P1/52
CPCC08G18/755C08G18/73C08G18/4833C08G18/10C08G18/2825C09D7/43D06P1/5285C08G18/3206C08G18/2805
Inventor 权衡王佳徐振明刘王辉倪丽杰卫增峰刘小川肖力
Owner WUHAN TEXTILE UNIV
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