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Waterborne polyurethane with solid content of 60%

A water-based polyurethane, polyurethane technology, applied in the field of polymer materials, can solve problems such as difficulty in introducing sulfonic acid groups

Active Publication Date: 2015-02-11
SHANGHAI SISHENG POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to prepare water-based polyurethane with a solid content of more than 50% by introducing sulfonic acid groups alone.

Method used

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  • Waterborne polyurethane with solid content of 60%
  • Waterborne polyurethane with solid content of 60%

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Water-based polyurethane comprises the following components by weight percentage:

[0053] (1) Polyurethane, 60%

[0054] Among them, by weight percentage, polyester polyol (molecular weight: 2000) containing sulfonate group, 30%; polyester polyol (molecular weight: 2000) containing highly branched chain structure, 45%; Isocyanate (IPDI), 6.9%; Dicyclohexylmethane diisocyanate (HMDI), 16.1%; Dimethylolpropionic acid, 2.0%.

[0055] (2) N-methylpyrrolidone (organic solvent), 5%

[0056] (3) Deionized water, 31.2%

[0057] (4) Ethylenediamine (organic amine chain extender), 2.3%

[0058] (5) Triethylamine (pH regulator), 1.5%.

[0059] The preparation method is as follows: using the prepolymer mixing method, first add polyester polyols containing sulfonate groups, polyester polyols containing highly branched chain structures, dimethylol propionic acid, and N-methylpyrrolidone according to the formula In the reaction kettle, add isophorone diisocyanate (IPDI) and dicy...

Embodiment 2

[0062] Water-based polyurethane comprises the following components by weight percentage:

[0063] (1) Polyurethane, 61%

[0064] Among them, by weight percentage, polyester polyol (molecular weight: 2000) containing sulfonate group, 32%; polyester polyol (molecular weight: 2000) containing highly branched chain structure, 48%; Isocyanate (IPDI), 9.25%; Dicyclohexylmethane diisocyanate (HMDI), 9.25%; Dimethylolpropionic acid, 1.5%.

[0065] (2) Acetone, which is half of the weight part of the polyurethane, is separated at last and is not included in the total weight percentage.

[0066] (3) Deionized water, 36.4%

[0067] (4) Ethylenediamine (organic amine chain extender), 1.5%

[0068] (5) Triethylamine (pH regulator), 1.1%.

[0069] The preparation method is: using the acetone method, first add polyester polyols containing sulfonate groups, polyester polyols containing highly branched chain structures, dimethylol propionic acid, and acetone into the reaction kettle accord...

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Abstract

The invention relates to preparation of waterborne polyurethane with the solid content of 60%. The waterborne polyurethane comprises the following components in parts by weight: 58-62 parts by weight of polyurethane, 0-6 parts by weight of an organic solvent, 30-40 parts by weight of deionized water, 1-3 parts by weight of an organic amine chain extender, and a proper amount of a pH value regulator. The preparation has the advantage that the high-solid-content waterborne polyurethane with the solid content of 60% is prepared through adopting of a specially-designed composite polyester polyol and a specially-designed composite isocyanate monomer. The composite polyester polyol comprises the following components in parts by weight: 20-40 parts by weight of a polyester polyol containing a sulfonate group, and 60-80 parts by weight of a polyester polyol having a highly branched structure. The composite isocyanate monomer comprises the following components in parts by weight: 20-70 parts by weight of isophorone diisocyanate (IPDI), and 30-80 parts by weight of dicyclohexyl methane diisocyanate (HMDI).

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of water-based polyurethane with a solid content as high as 60%. Background technique [0002] Water-based polyurethane has the advantages of non-combustibility, no pollution to the environment, and energy saving. It has developed considerably at home and abroad, and its application fields are becoming wider and wider. [0003] Water-based polyurethane essentially has the excellent characteristics of solvent-based polyurethane, but its solid content is usually low, and domestic products are mostly 20%-40%, which limits its application in many fields. This is mainly due to the influence of the following factors: (1) The latent heat of evaporation of water is much higher than that of solvents, and the energy consumption during construction is higher; (2) The surface tension of water is three times that of commonly used solvents, and the wetting of the substrate...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/66C08G18/46C08G18/42C08G18/32C08G18/12
CPCC08G18/0823C08G18/12C08G18/348C08G18/4202C08G18/4238C08G18/4676C08G18/6659C08G18/751C08G18/755C08G18/3228
Inventor 韦雨春
Owner SHANGHAI SISHENG POLYMER MATERIAL
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