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Preparation method of high-glossiness high-water-permeability polyurethane resin

A polyurethane resin, water-permeable technology, used in polyurea/polyurethane coatings, animal husbandry, chemical treatment of small raw hides/large raw hides/leather hides/furs, etc. To avoid problems such as large dosage of additives, environmental and human health hazards, etc., to achieve the effects of excellent hand feel and anti-wrinkle performance, excellent hydrophilicity, and increased solid content

Active Publication Date: 2016-07-27
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the amount of carboxylic acid type chain extender is large, the water resistance of the film will deteriorate
In addition, such water-based polyurethane generally adopts amine small-molecule chain extenders for post-chain extension, such as ethylenediamine, etc. Amine chain extenders are relatively volatile and cause harm to the environment and human health during use.
For the above high-gloss resins, taking the reflective gloss of 60° as an example, except for the general anionic water-based polyurethane resin gloss > 80%, the gloss of the other two resins can only reach 80-90%, although solvent-based resins also have higher gloss, but it uses a large amount of organic solvents, which has adverse effects on the environment and human health

Method used

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  • Preparation method of high-glossiness high-water-permeability polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 A kind of preparation method of high light and high water permeability polyurethane resin, steps and conditions are as follows: material and mass percentage are as follows:

[0019] Polyol 49.2%, diisocyanate 38.4%, catalyst 0.8%, carboxylic acid type hydrophilic chain extender 2.5%, neutralizer 2.1%, pre-chain extender 4.2%, end-blocking agent 1.7%, post-chain extender 1.1% ;

[0020] The specific addition amount is as follows: the polyol is polybutylene adipate (Mn=2000), the mass is 43.48g; the diisocyanate is isophorone diisocyanate, the mass is 33.9g; the catalyst is organic bismuth, the mass is 0.70g; The carboxylic acid-type hydrophilic chain extender is dimethylolpropionic acid, with a mass of 2.2g; the neutralizer is triethylamine, with a mass of 1.88g; the pre-chain extender is 1,4 butanediol, with a mass of 3.74g; The agent is octadecylamine, quality 1.52g; The post-chain extender is 2-[(2-aminoethyl)amino]sodium ethanesulfonate aqueous solution...

Embodiment 2

[0026] Embodiment 2 A kind of preparation method of high light and high water permeability polyurethane resin, steps and conditions are as follows: material and mass percentage are as follows:

[0027] Polyol 66%, diisocyanate 24.5%, catalyst 1%, carboxylic acid type hydrophilic chain extender 2.6%, neutralizer 1.9%, pre-chain extender 1.1%, end-blocking agent 1.4%, post-chain extender 1.5% ;

[0028] The specific addition amount is as follows: the polyol is polytetrahydrofuran ether diol (Mn=2000), the mass is 50.21g; the polypropylene glycol (Mn=2000), the mass is 20.45g; the diisocyanate is isophorone diisocyanate, the mass is 26.32g; The catalyst is organic bismuth, with a mass of 1.06g; the carboxylic acid type hydrophilic chain extender is dimethylol propionic acid, with a mass of 2.8g; the neutralizer is triethylamine, with a mass of 2.11g; the pre-chain extender is 1,4 butyl Diol, quality 1.22g; End-capping agent is octadecylamine, quality 1.51g; Post-chain extender i...

Embodiment 3

[0034] Example 3 A preparation method of high-gloss and high-water-permeability polyurethane resin, the steps and conditions are as follows: materials and mass percentages are as follows: polyol 57.8%, diisocyanate 29%, catalyst 0.9%, carboxylic acid type hydrophilic chain extender 3.1% , neutralizer 2.3%, pre-chain extender 3%, end-capping agent 2.2%, post-chain extender 1.7%

[0035] The specific addition amount is as follows: the polyol is polytetrahydrofuran ether diol (Mn=2000), the mass is 53.83g; the diisocyanate is isophorone diisocyanate, the mass is 27g;

[0036] The catalyst is organic bismuth, with a mass of 0.83g; the carboxylic acid type hydrophilic chain extender is dimethylolpropionic acid, with a mass of 2.9g; the neutralizer is triethylamine, with a mass of 2.18g; the pre-chain extender is 1,4 Butanediol, quality 2.83g; End-capping agent is octadecylamine, quality 2.1g; Post-chain extender is the 2-[(2-aminoethyl)amino] sodium ethanesulfonate aqueous solution...

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Abstract

The invention provides a preparation method of high-glossiness high-water-permeability polyurethane resin.Firstly, a waterborne polyurethane prepolymer is prepared, partial end capping is conducted on the prepolymer with octadecylamine, then a hydrophilic chain extender 2-[(2-amino ethyl)amino]sodium ethanesulfonic acid water solution is added dropwise while the prepolymer is dispersed in deionized water, after chain extension is conducted, then acetone or butanone in a system is removed under the vacuum condition, and the high-glossiness high-water-permeability polyurethane resin is prepared.The method is simple in process, it is unnecessary to add a large quantity of organic solvents, no defoamer is needed, and the solid content of the obtained high-glossiness high-water-permeability polyurethane resin is high and is 41-46%; the tensile strength is 39.8-42.2 MPa, and the elongation at break is 789-857%.Glossiness (60 degrees) is 90, light transmittance is 89%, qualification is good, and adhesive film is good in water resistance and solvent resistance and high in mechanical property, glossiness and light transmittance.

Description

technical field [0001] The invention relates to a preparation method of high-gloss and high-water-permeability polyurethane resin. Background technique [0002] At present, high-gloss resins can be used in leather coatings, fabric finishing, PVC plastic coatings, etc. Although acrylic resin has good gloss, high hardness and good weather resistance, it is brittle and has poor elasticity. Alkyd resins have good permeability, but poor blocking resistance and slow drying also limit their use. General anionic high-gloss water-based polyurethane, in the preparation method, to ensure high gloss, high light transmittance, more hydrophilic chain extenders should be used in the pre-chain extension, at least 3-4%, such as two Methylol propionic acid or dimethylol butyric acid, but as the usage of this carboxylic acid-type hydrophilic chain extender increases, the viscosity of the prepolymer will increase, and the amount of organic solvent used to adjust the viscosity will increase. ...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/66C08G18/42C08G18/34C08G18/32C08G18/38C08G18/28C08G18/12C08G18/48D06M15/568D06M15/572C09D175/06C09D175/08C14C11/00
CPCC08G18/12C08G18/2865C08G18/3206C08G18/348C08G18/3855C08G18/4238C08G18/4808C08G18/4825C08G18/4854C08G18/6633C08G18/6666C08G18/755C09D175/06C09D175/08C14C11/006D06M15/568D06M15/572
Inventor 吴广峰杨智慧刘雪雁陈天琪尹浩宇韩冰冰张会轩
Owner CHANGCHUN UNIV OF TECH
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