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Waterborne polyurethane paint with high stability

A water-based polyurethane, stability technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of application and development limitations, general storage stability, turbidity, etc.

Inactive Publication Date: 2019-02-12
肥西县创玺建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-based polyurethane coating itself has poor water resistance, which limits its application and development. At the same time, its storage stability is average, and problems such as foam and turbidity that affect the quality of the coating are prone to occur during long-term storage and transportation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A waterborne polyurethane coating with good stability, which is made of the following components in parts by weight: modified waterborne polyurethane emulsion 98, polyethylene glycol 12, nano calcium carbonate 18, leveling agent 1.2, propylene glycol methyl ether acetate 2.5, Aluminum tripolyphosphate 2.8, pigment 1, deionized water 70.

[0017] Further, the preparation method of the modified waterborne polyurethane emulsion includes the following steps:

[0018] (1) Preparation of modifier: under inert atmosphere, mix unsaturated ester compounds, higher alcohols, sodium trimethylsiloxy, trichlorosilane, and chloroplatinic acid hexahydrate, and heat to 82°C at 1500r Stir for 20 minutes at speed per minute, then adjust the temperature to 88°C, keep the temperature in the water bath for 15 minutes, add initiator, stir evenly, reflux and stir for 3 hours, cool to room temperature naturally, and purify the reaction product to obtain the modifier; The molar ratio of the unsatura...

Embodiment 2

[0026] A waterborne polyurethane coating with good stability, which is made of the following components in parts by weight: modified waterborne polyurethane emulsion 105, polyethylene glycol 16, nano calcium carbonate 23, leveling agent 1.8, propylene glycol methyl ether acetate 3.6, Aluminum tripolyphosphate 3.5, pigment 2, deionized water 78.

[0027] Further, the preparation method of the modified waterborne polyurethane emulsion includes the following steps:

[0028] (1) Preparation of modifier: under inert atmosphere, mix unsaturated ester compounds, higher alcohols, sodium trimethylsiloxy, trichlorosilane, and chloroplatinic acid hexahydrate, and heat to 85°C at 1500r Stir for 30 min at speed per min, then adjust the temperature to 88°C, keep the temperature in the water bath for 15 min, add the initiator, stir evenly, reflux and stir for 4 hours, cool to room temperature naturally, and purify the reaction product to obtain the modifier; The molar ratio of the unsaturated es...

Embodiment 3

[0036] A waterborne polyurethane coating with good stability, which is made of the following components in parts by weight: modified waterborne polyurethane emulsion 102, polyethylene glycol 13, nano calcium carbonate 21, leveling agent 1.5, propylene glycol methyl ether acetate 2.8, Aluminum tripolyphosphate 3.1, pigment 1.2, deionized water 75.

[0037] Further, the preparation method of the modified waterborne polyurethane emulsion includes the following steps:

[0038] (1) Preparation of modifier: under inert atmosphere, mix unsaturated ester compounds, higher alcohols, sodium trimethylsiloxy, trichlorosilane, and chloroplatinic acid hexahydrate, and heat to 83°C at 1500r Stir for 25 min at speed per min, then adjust the temperature to 88°C, keep the temperature in a water bath for 15 min, add the initiator, stir evenly, stir at reflux for 3.4 hours, cool to room temperature naturally, and purify the reaction product to obtain the modifier; The molar ratio of the unsaturated e...

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Abstract

The invention discloses waterborne polyurethane paint with high stability, and relates to the technical field of waterborne paint. The waterborne polyurethane paint is prepared from the following ingredients: modified waterborne polyurethane emulsion, polyethylene glycol, nanometer calcium carbonate, leveling agents, propylene glycol monomethyl ether acetate, aluminum triphosphate, pigments and deionized water. The prepared waterborne polyurethane paint has a good foam-inhibiting effect.

Description

Technical field [0001] The invention belongs to the technical field of water-based paints, and specifically relates to a water-based polyurethane paint with good stability. Background technique [0002] In recent years, with the development of productivity and the continuous improvement of people’s quality of life, water-based polyurethane uses water as the main solvent, which has the advantages of non-polluting, non-toxic, good film-forming properties, good film flexibility, and strong adhesion. People meet the requirements for low VOC emissions in coatings, and water-based polyurethane coatings have developed rapidly in recent decades. However, the poor water resistance of water-based polyurethane coatings restricts its application and development. At the same time, its storage stability is average. Foam and turbidity are likely to occur during long-term storage and transportation, which affect the quality of the coating. Summary of the invention [0003] The purpose of the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/65
CPCC09D175/04C08K2003/265C08K2003/327C08K2201/011C08L2205/035C09D7/61C09D7/65C08L5/04C08L71/02C08L1/284C08K3/26C08K3/32
Inventor 郭平
Owner 肥西县创玺建材科技有限公司
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