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A kind of aqueous polymer polyurethane dispersant and preparation method thereof

A polyurethane dispersant and water-based polymer technology, applied in chemical instruments and methods, transportation and packaging, coatings, etc., can solve problems such as application restrictions, reduce system viscosity, enhance water resistance and salt spray resistance, and versatility wide effect

Active Publication Date: 2022-05-13
KITO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong hydrophilicity of the carboxylate ion group, it has a great influence on the water resistance and salt spray resistance of the coating film. In the fields with relatively high requirements such as industrial coatings and automotive coatings, polycarboxylate Applications of water-based dispersants are often limited

Method used

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  • A kind of aqueous polymer polyurethane dispersant and preparation method thereof
  • A kind of aqueous polymer polyurethane dispersant and preparation method thereof
  • A kind of aqueous polymer polyurethane dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a water-based polymer polyurethane dispersant and a preparation method of the dispersant.

[0023] The raw materials used to prepare the dispersant of this embodiment are: Desmodur IL1451 BA, styrenated phenol, MPEG-350, N'N-dimethylethanolamine, butyl acetate, distilled water.

[0024] The preparation method of dispersant specifically comprises the following steps:

[0025] 1) Weigh 10g of butyl acetate and add it to a four-necked flask equipped with a stirring and condensing device. Under stirring, add 20g of Desmodur IL1451 BA and mix evenly, then add 4.30g of styrenated phenol, and protect with nitrogen. At 65°C, keep warm for 1h;

[0026] 2) Weigh 6.17g of MPEG-350, add it to a four-necked flask, and keep it warm for 1.5h;

[0027] 3) Add 0.63g of N'N-dimethylethanolamine dropwise, keep stirring the reaction, the dropwise addition is completed in 0.5h, keep warm for 0.5h and raise the temperature to 85°C, then keep warm for 2h, then lower...

Embodiment 2

[0029] This embodiment provides a water-based polymer polyurethane dispersant and a preparation method of the dispersant.

[0030] The raw materials used to prepare the dispersant of this example include: Desmodur IL1451 BA, styrenated phenol, MPEG-500, DMP-30, butyl acetate, and distilled water.

[0031] The preparation method of dispersant specifically comprises the following steps:

[0032] 1) Weigh 10g of butyl acetate and add it to a four-necked flask equipped with a stirring and condensing device. Under stirring, add 20g of Desmodur IL1451 BA and mix evenly, then add 7.17g of styrenated phenol, and protect with nitrogen. At 70°C, keep warm for 1.5h;

[0033] 2) Weigh 5.29g of MPEG-500, add it to a four-necked flask, and keep it warm for 1h;

[0034] 3) Weigh 1.87g of DMP-30 and 5g of butyl acetate and mix them uniformly in advance, add the mixture dropwise, and keep stirring the reaction. After 1 hour of dropwise addition, raise the temperature to 95°C after 1 hour of ...

Embodiment 3

[0036] This embodiment provides a water-based polymer polyurethane dispersant and a preparation method of the dispersant. The raw materials used to prepare the dispersant of this embodiment are: Desmodur IL1451 BA, styrenated phenol, AEO-9, N'N-diethylethanolamine, butyl acetate, distilled water.

[0037] The preparation method of dispersant specifically comprises the following steps:

[0038] 1) Weigh 10g of butyl acetate and add it to a four-necked flask equipped with a stirring and condensing device, under stirring, add 20g of Desmodur IL1451 BA and mix evenly, add 2.87g of styrenated phenol, nitrogen protection, in At 70°C, keep warm for 0.5h;

[0039] 2) Weigh 14.38g of AEO-9, add it to a four-necked flask, and keep it warm for 2 hours;

[0040] 3) Add 0.41g of N'N-diethylethanolamine dropwise, keep stirring the reaction, the dropwise addition is completed in 0.5h, keep warm for 0.5h and raise the temperature to 90°C, then keep warm for 2h, then lower the temperature to...

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Abstract

The invention relates to the technical field of fine chemical additives, in particular to a water-based polymer polyurethane dispersant and a preparation method thereof. The present invention introduces styrenated phenol into the molecular structure to generate a more multivariate aromatic hydrocarbon structure, which has better wetting and dispersibility for organic pigments, and more effectively reduces the viscosity of the system. At the same time, aromatic hydrocarbon isocyanate and alkyl-terminated mono Hydroxypolyoxyethylene ether and monohydroxyl tertiary amine react to introduce pigment anchoring groups such as polyoxyethylene ether and tertiary amine into the molecular structure, so that the dispersant has excellent wetting and dispersing effect on carbon black. The water solubility is adjusted by introducing alkyl polyoxyethylene ether, avoiding the introduction of strong hydrophilic carboxylate ions, thereby enhancing the water resistance and salt spray resistance of the paint film. In addition, using monohydroxyl tertiary amine as a catalyst avoids the Use of organometallic catalysts. The dispersant of the invention does not contain organic solvents and organic metals, has wide versatility and high performance, and is an environment-friendly polymer dispersant.

Description

technical field [0001] The invention relates to the technical field of fine chemical additives, in particular to a water-based polymer polyurethane dispersant and a preparation method of the dispersant. Background technique [0002] With the continuous improvement of environmental protection requirements, the research and application of water-based paints and inks continue to deepen. As an important part of water-based paints, the development and application of water-based color pastes are also continuously strengthened. As the most critical component of water-based colorants, water-based dispersants are restricted by the level of development and application of the entire industry. [0003] At present, the longest and most mature water-based dispersant on the market is the traditional polycarboxylate-based water-based dispersant, which has highly polar carboxylate ion groups in its molecular structure and has excellent wetting properties for pigments. It has the advantages ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/79C08G18/28C08G18/18C09K23/52C09B67/46C09D7/65
CPCC08G18/794C08G18/2825C08G18/283C08G18/2875C08G18/1825C09B67/009C09D7/65C09K23/16
Inventor 王文陶金铸
Owner KITO CHEM CO LTD
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