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Polyetheramine modified aqueous polyurethane resin and preparation method thereof

The technology of water-based polyurethane and polyetheramine is applied in the field of modified water-based polyurethane resin, polyetheramine-modified water-based polyurethane resin and its preparation, and can solve the problems of low film-forming fastness, poor water resistance, easy water absorption, poor stability, etc. Achieving the effect of balancing hardness and flexibility, excellent adhesion, and improving the hardness of the paint film

Inactive Publication Date: 2020-02-28
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, water-based polyurethane uses water as a solvent, which has poor stability during storage or transportation, is prone to delamination, and has poor adhesion
Moreover, when the water-based polyurethane is combined with the substrate, because the surface tension of the medium water is too large, the polyurethane has poor water resistance after film formation on the surface of the substrate and is easy to absorb water, and the film-forming fastness is low and easy to separate from the substrate. After spraying, the product feels hard and has poor flexibility
At the same time, its impact resistance, corrosion inhibition and oxidation resistance are not good. In view of this, researchers began to modify water-based polyurethane resin
[0004] Chinese patent CN110054756A discloses a silicone-modified polyurethane resin containing fluorocarbon branched chains and its preparation method. The polyurethane resin contains organosilane and fluorocarbon branched chains, which can make the polyurethane resin react with hydroxyl groups on glass or metal , so that it has good adhesion, and the fluorocarbon branched chain can make the polyurethane resin have a hydrophobic and oleophobic effect; it is colorless and transparent, has low viscosity, excellent weather resistance, and good compatibility with various solvents; the polyurethane resin can Coating on various glass, stone, and metal has the effect of hydrophobic and oleophobic and easy to clean; but the weather resistance and oxidation resistance of the invention are not ideal, and it is difficult to adjust the hardness and flexibility at the same time

Method used

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  • Polyetheramine modified aqueous polyurethane resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A polyetheramine-modified water-based polyurethane resin, which consists of the following formula in parts by weight: 46.0 parts of isophorone diisocyanate, 30.0 parts of polytetrahydrofuran diol, 8.0 parts of polyetheramine, 5.0 parts of butanediol, 2.0 parts of trimethylolpropane, 3.2 parts of dimethylolpropionic acid, 0.05 parts of dibutyltin dilaurate, 2.2 parts of ethanol, 1.6 parts of sodium bicarbonate, 8.0 parts of triethylamine, and 160.0 parts of deionized water.

[0026] A kind of preparation method of polyetheramine modified waterborne polyurethane resin in the present embodiment, comprises the following steps:

[0027] a) In the multifunctional reactor, add polytetrahydrofuran diol, butanediol and trimethylolpropane in sequence according to the weight of the formula, raise the temperature to 110°C, and dehydrate under vacuum for 1.5h;

[0028] b) Cool down to 70°C, add dimethylolpropionic acid and isophorone diisocyanate, and pass through N 2 , stirred and...

Embodiment 2

[0031] A polyetheramine modified water-based polyurethane resin, which consists of the following formula in parts by weight: 36.0 parts of toluene diisocyanate, 28.0 parts of polycarbonate diol, 7.0 parts of polyetheramine, 1,4-cyclohexane di 8.0 parts of methanol, 3.0 parts of dimethylolpropionic acid, 0.04 parts of dibutyltin dilaurate, 2.0 parts of ethanol, 1.5 parts of sodium bicarbonate, 6.0 parts of ammonia water, and 140.0 parts of deionized water.

[0032] A kind of preparation method of polyetheramine modified waterborne polyurethane resin in the present embodiment, comprises the following steps:

[0033] a) In the multifunctional reactor, add polycarbonate diol and 1,4-cyclohexanedimethanol in sequence according to the weight of the formula, raise the temperature to 105°C, and dehydrate under vacuum for 2.0 hours;

[0034] b) Cool down to 70°C, add dimethylolpropionic acid and toluene diisocyanate, and pass N 2 , stirred and reacted for 0.5h, added dropwise the amou...

Embodiment 3

[0037] A polyetheramine modified water-based polyurethane resin, which consists of the following formula in parts by weight: 30.0 parts of hexamethylene diisocyanate, 26.0 parts of polycaprolactone diol, 6.0 parts of polyetheramine, dipropylene glycol 5.0 parts, 1.8 parts of trimethylolpropane, 3.5 parts of dimethylolpropionic acid, 0.05 parts of dibutyltin dilaurate, 2.0 parts of ethanol, 1.3 parts of sodium bicarbonate, 7.0 parts of triethylamine, 130.0 parts of deionized water.

[0038] A kind of preparation method of polyetheramine modified waterborne polyurethane resin in the present embodiment, comprises the following steps:

[0039] a) In the multifunctional reactor, add polycaprolactone diol, dipropylene glycol, and trimethylolpropane in sequence according to the weight of the formula, raise the temperature to 110°C, and dehydrate under vacuum for 2.0 hours;

[0040] b) Cool down to 70°C, add dimethylolpropionic acid and hexamethylene diisocyanate, and pass N 2 , stir...

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Abstract

The invention relates to a polyetheramine modified aqueous polyurethane resin, which comprises following components in parts by weight: 25.0 to 55.0 parts of diisocyanate, 20.0 to 45.0 parts of oligomer polyol, 5.0 to 10.0 parts of polyetheramine, 6.0 to 10.0 parts of a chain extender, 2.0 to 4.5 parts of dihydroxymethyl propionic acid, 0.03 to 0.08 part of dibutyl tin dilaurate, 1.5 to 3.0 partsof ethanol, 0.5 to 2.0 parts of sodium bicarbonate, 2.5 to 10.0 parts of a neutralizing agent, and 100.0 to 200.0 parts of deionized water. The provided polyetheramine modified aqueous polyurethane resin has the characteristics of excellent adhesion force, waterproof property, impact resistance, corrosion resistance, antioxidant property, alkali / acid resistance, and aging resistance, the strengthof the coating is obviously enhanced, and the hardness and flexibility of the coating are balanced.

Description

technical field [0001] The invention relates to a modified waterborne polyurethane resin, in particular to a polyetheramine modified waterborne polyurethane resin and a preparation method thereof, belonging to the technical field of waterborne resin synthesis. Background technique [0002] Water-based polyurethane uses water as the dispersion medium. Compared with solvent-based polyurethane, it has the advantages of non-combustibility, low odor, non-toxic, non-polluting, energy-saving, and convenient operation. It has been widely used as leather finishing agent, textile auxiliary agent, paper industry auxiliary agent Agents, coatings and adhesives, etc., its products have been successfully used in textile, leather, wood processing, construction, papermaking and other industries, and the application fields are still expanding. [0003] However, water-based polyurethane uses water as a solvent, which has poor stability during storage or transportation, is prone to delamination...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/76C08G18/73C08G18/12C08G18/66C08G18/48C08G18/32C08G18/34C08G18/44C08G18/50
CPCC08G18/0823C08G18/12C08G18/3206C08G18/3212C08G18/348C08G18/4277C08G18/44C08G18/4854C08G18/5024C08G18/6659C08G18/6692C08G18/73C08G18/755C08G18/7621C08G18/48
Inventor 张武康伦国姚东生
Owner UNION FOSHAN CHEM