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Preparation method of waterborne polyurethane with excellent freeze-thawing stability

A water-based polyurethane, freeze-thaw stability technology, applied in the field of preparation of water-based polyurethane, can solve the problems of water-based polyurethane resin, such as low strength, insufficient viscosity and wear resistance, application limitations, etc., to improve adhesion and performance Superior, good wear resistance effect

Active Publication Date: 2013-12-25
JIANGSU HUAXIA PAINT MAKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, at this stage, the strength of water-based polyurethane resin is not high, the viscosity and wear resistance are not good enough, and the freeze-thaw resistance is also poor, so its application is also limited.

Method used

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  • Preparation method of waterborne polyurethane with excellent freeze-thawing stability
  • Preparation method of waterborne polyurethane with excellent freeze-thawing stability
  • Preparation method of waterborne polyurethane with excellent freeze-thawing stability

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) At 70° C., add 88.00 g of amino cage silsesquioxane T8 to 174.00 g of toluene diisocyanate in acetone (750.00 g), and react until clear.

[0036] (2) Add 75.00g of 2,2-Dimethylolbutoxyethylene glycol (20EO, see structural formula (II), where n=20) methyl ether (ethoxy-terminated polymer glycol) , 200.00g of polyglycol 1000, 4.60g of glycerol and 2.71g of catalyst di-n-butyltin dilaurate, reacted at 60°C for 2h; then heated to 85°C and continued to react for 2h before returning to room temperature.

[0037] (3) Add 300 g of deionized water to the mixture after it has dropped to room temperature to disperse at 25°C.

[0038] (4) After dispersion, add 29.81g of ethylenediamine at 40°C to carry out chain extension reaction for 3h, then cool to room temperature to obtain waterborne polyurethane with good freeze-thaw stability. The solid content is determined to be 33.35%, and the particle size is 323.6nm.

[0039] The reaction conditions and parameters of each step in Examples ...

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Abstract

The invention discloses a preparation method of waterborne polyurethane with excellent freeze-thawing stability. The preparation method specifically comprises the steps of: at 20-80 DEG C, adding amino type polyhedral oligomeric silsesquioxane into acetone of excessive isocyanate monomer, reacting to be clear, setting the temperature to be 60 DEG C, adding ethyoxyl-terminated polymer glycol, diol and polyol, and catalyst di-n-butyl tin dilaurate, reacting for one to two hours, and controlling the R value to be 1.50-3.00 in the prepolymerization reaction; then increasing the temperature to be 70-90 DEG C, continuously reacting for one to two hours, then cooling to room temperature, adding water for dispersion, adding a chain extender at 30-50 DEG C to conduct chain extension reaction for two to four hours, and cooling to room temperature to obtain waterborne polyurethane. Through tests, the waterborne polyurethane has favorable wear resistance property and bonding strength, as well as excellent freeze-thawing stability.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a preparation method of water-based polyurethane with good freeze-thaw stability. Background technique [0002] Waterborne polyurethane is a new type of polymer material with polyurethane resin as the base material and water instead of organic solvent as the dispersion medium. It not only retains some of the excellent properties of traditional solvent-based polyurethane, but also has the advantages of non-toxic, non-flammable, non-polluting, and energy-saving, and has attracted people's attention. As a new type of green environmental protection material, it has been widely used in the fields of textile, printing and dyeing, leather processing, wood processing and construction. [0003] Waterborne polyurethane combines the advantages of polyurethane with the low volatile organic compound (VOC) content of water itself, which is in line with the "three prerequisites" (resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/42C08G18/62C08G18/44C08G18/32C08G18/12
Inventor 程齐利
Owner JIANGSU HUAXIA PAINT MAKING
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