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High-adhesive water-based polyurethane anti-corrosion and waterproof coating and preparation method thereof

A water-based polyurethane, high-adhesion technology, applied in the field of coatings, can solve the problems of limited application range, water resistance, solvent resistance and mechanical properties are not ideal, and achieve improved mechanical properties, strong anti-corrosion and waterproof ability, and weather resistance. Good results

Inactive Publication Date: 2016-09-28
扬州豪扬新型建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most waterborne polyurethanes are linear polymers with a linear structure, and their water resistance, solvent resistance and mechanical properties are not ideal, which limits their scope of application.

Method used

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  • High-adhesive water-based polyurethane anti-corrosion and waterproof coating and preparation method thereof
  • High-adhesive water-based polyurethane anti-corrosion and waterproof coating and preparation method thereof
  • High-adhesive water-based polyurethane anti-corrosion and waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The concrete preparation steps of coating in the present embodiment are:

[0022] 1) Weigh 14g bamboo wood powder (crystallinity 52%, filter with 100 mesh screen before weighing), bake it in vacuum -0.1Mpa, high temperature 50~55℃ for 1h, take it out, and then mix it with 8g nano Metal powder (wherein containing 3.2g silver powder, 2.6g chromium powder and 2.2g zinc powder) is put into ball mill, ball mills 20min, then the mixture of the two is transferred to mixing mixer, then add 34gN- dodecylpyridine hexafluorophosphate and 8g of cetyltrimethylammonium bromide, stirred at 1200rpm for 0.5h, taken out, and ultrasonically dispersed for 20min;

[0023] 2) Put the dispersion obtained in step 1) in a reaction kettle, heat to 70-75°C, keep at this temperature for 10 minutes, then slowly add 90g of polyurethane emulsion (solid content 30%), stir and react at 1800rpm for 1h, slowly drop Add 1.6g of dibutyltin dilaurate, keep the temperature at 70-75°C for reflux reaction for...

Embodiment 2

[0026] The concrete preparation steps of coating in the present embodiment are:

[0027] 1) Weigh 10g bamboo wood powder (56% crystallinity, filter with 100 mesh screen before weighing), bake it in vacuum -0.1Mpa, high temperature 50~55℃ for 1h, take it out, and then mix it with 10g nano Metal powder (which contains 4.3g silver powder, 2.2g chromium powder and 3.5g zinc powder) is put into a ball mill, ball milled for 20min, then the mixture of the two is transferred to a mixing mixer, and then 40gN-butylpyridinium hexafluorophosphate and 10g2- Sodium undecyl-N-oxyethyl acetate, stirred at 1200rpm for 0.5h, taken out, and ultrasonically dispersed for 20min;

[0028] 2) Put the dispersion obtained in step 1) in a reaction kettle, heat it to 70-75°C, keep it at this temperature for 10 minutes, then slowly add 95g of polyurethane emulsion (solid content 30%), stir and react at 1800rpm for 1h, slowly drop Add 1g of dibutyltin dilaurate, keep the temperature at 70-75°C for reflux ...

Embodiment 3

[0031] The concrete preparation steps of coating in the present embodiment are:

[0032] 1) Weigh 16g bamboo wood powder (55% crystallinity, filter with 100 mesh screen before weighing), bake it in vacuum -0.1Mpa, high temperature 50~55℃ for 1h, take it out, and then mix it with 6g nano Metal powder (which contains 2.2g silver powder, 2.7g chromium powder and 1.1g zinc powder) is put into the ball mill, ball milled for 20min, then the mixture of the two is transferred to the mixing mixer, then add 30gN-butylpyridine tetrafluoroborate and 6g Octylphenyl polyoxyethylene ether, stirred at 1200rpm for 0.5h, taken out, and ultrasonically dispersed for 20min;

[0033] 2) Put the dispersion obtained in step 1) in a reaction kettle, heat to 70-75°C, keep at this temperature for 10 minutes, then slowly add 80g of polyurethane emulsion (solid content 30%), stir and react at 1800rpm for 1h, slowly drop Add 2g of dibutyltin dilaurate, keep the temperature at 70-75°C for reflux reaction f...

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Abstract

The invention discloses an aqueous polyurethane antiseptic and waterproof coating with high cohesiveness. The coating comprises the following raw materials in parts by weight: 40-50 parts of polyurethane emulsion, 15-20 parts of pyridine ionic liquid, 5-8 parts of bamboo powder, 3-5 parts of nanometal, 18-22 parts of inorganic functional filling, 8-10 parts of vegetable oil, 1-3 parts of 2-naphthol, 1-3 parts of isopropyl myristate, 0.5-1 part of dibutyltin dilaurate, 1-3 parts of dimethyl sulfoxide, 3-5 parts of surfactant, 1-2 parts of coalescing agent and 60-80 parts of water. In the invention, pollution-free and environment-friendly ionic liquid is used as a cosolvent, the cohesiveness of the polyurethane emulsion can be greatly improved, and furthermore, nano-particles are uniformly dispersed in the coating, so that the difficult problem of aggregation of the nano-particles is solved. The coating provided in the invention has the advantages of strong cohesiveness, crack resistance, good waterproof performance, good corrosion resistance in severe environments such as acid, alkali, salt and oil, and obviously prolonged service life.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a highly cohesive water-based polyurethane anti-corrosion and waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane coatings are the most versatile coating species after alkyd resins. Water-based polyurethane coatings are based on water-based polyurethane resins and formulated with water instead of traditional solvents as dispersants. They have the advantages of low toxicity, non-flammability, no pollution to the environment, good weather resistance, stable color, and good low-temperature construction. , At the same time, due to the tailorability of polyurethane molecules, combined with new synthesis and cross-linking technologies, the composition and structure of coatings can be effectively controlled. It is the fastest-growing water-based coating product in recent years. However, most waterborne polyurethanes are linear po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D197/02C09D7/12C09D5/10
CPCC08K2201/011C08L2205/025C08L2205/035C08L2205/16C09D5/106C09D7/47C09D7/61C09D7/63C09D7/65C09D7/70C09D175/04C08L97/02C08L91/00C08K13/02C08K2003/0893C08K2003/0806C08K3/08C08K5/19C08K5/12C08K2003/2227C08K2003/2296
Inventor 曹茂盛
Owner 扬州豪扬新型建筑材料有限公司
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