Matt waterborne polyurethane material and preparation method thereof

A water-based polyurethane, matte technology, applied in the field of water-based polyurethane materials, can solve the problems of decreased coating performance, reduced coating film transparency, poor coating resistance to polishing, etc., to achieve stable emulsion performance, avoid whitening and yellowing, and excellent The effect of mechanical properties

Inactive Publication Date: 2018-12-14
安徽匠星联创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, water-based matte products represented by matte / matt are gradually popular among people. However, the method of physically adding matting agents is generally used to prepare water-based matting paints. The performance of the coating is reduced such as precipitation, the storage stability of the coating is poor, the coating is poor in polishing resistance, and the transparency of the coating film is reduced.

Method used

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  • Matt waterborne polyurethane material and preparation method thereof
  • Matt waterborne polyurethane material and preparation method thereof
  • Matt waterborne polyurethane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh each raw material according to the table below.

[0028]

[0029]

[0030] Preparation of matte water-based polyurethane material:

[0031] (1) Preparation of prepolymer: Add macromolecular polyol and small molecule chain extender to a four-neck flask, stir evenly, heat up to 90-100°C for vacuum dehydration for 1 hour, cool down to 60°C, add diisocyanate at one time, and then drop Add 2 drops of catalyst, stir, keep warm at 75°C for 2 hours, then add a small molecule hydrophilic compound, drop 1 drop of catalyst, keep warm for 2 hours, cool down to below 50°C, slowly add neutralizer dropwise, stir evenly, and get water-based Polyurethane prepolymer;

[0032] (2) Preparation of anionic emulsifier aqueous solution: take anionic emulsifier and dissolve it in deionized water, stir evenly to obtain anionic emulsifier aqueous solution;

[0033] (3) Prepolymer dispersion and chain extension: quickly pour the water-based polyurethane prepolymer into the anionic em...

Embodiment 2

[0035] Weigh each raw material according to the table below.

[0036]

[0037]

[0038] The preparation method of the matte water-based polyurethane material of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0040] Weigh each raw material according to the table below.

[0041] raw material

[0042] The preparation method of the matte water-based polyurethane material of this embodiment is the same as that of Embodiment 1.

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Abstract

The invention discloses a matt waterborne polyurethane material and a preparation method and relates to the technical field of waterborne polyurethane materials. The matt waterborne polyurethane material has the solid content of 30%-40% and is prepared from raw materials in parts by weight as follows: 20-30 parts of diisocyanate, 40-50 parts of macromolecular polyols, 1.2-3 parts of a small-molecular chain extender, 1-2.5 parts of a small-molecular hydrophilic compound, 0.2-0.4 parts of a catalyst, 0.7-1.4 parts of an anionic emulsifier, 131-170 parts of deionized water, 0.7-2 parts of a neutralizer and 3-5 parts of a polyamine chain extender. The prepared matt waterborne polyurethane material does not require an additional matting agent, avoids the whitening and yellowing phenomena and issafe and environmentally friendly, and the emulsion performance is stable; the matt waterborne polyurethane material has excellent mechanical performance, friction resistance and water resistance, has matt performance and can be widely applied to waterborne coatings.

Description

Technical field: [0001] The invention relates to the technical field of water-based polyurethane materials, in particular to a matte water-based polyurethane material and a preparation method thereof. Background technique: [0002] The most representative of water-based coatings is water-based polyurethane coatings, which do not contain or contain a small amount of organic solvents, small particle size, good dispersion stability, and not only retain some excellent properties of traditional solvent-based polyurethane coatings , but also has the advantages of low film forming temperature, strong adhesion, good wear resistance, high hardness, chemical resistance and weather resistance. [0003] At present, water-based matte products represented by matte / matt are gradually popular among people. However, the method of physically adding matting agents is generally used to prepare water-based matting paints. The resulting matte coating has poor brittleness and causes The performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/48C08G18/44C08G18/12
CPCC08G18/12C08G18/44C08G18/4854C08G18/6659C08G18/6692C08G18/755C08G18/7614C08G18/7671C08G18/3228C08G18/3231
Inventor 刘明星梁亚平孙学武周静静
Owner 安徽匠星联创新材料科技有限公司
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