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A kind of high-solid anionic aqueous polyurethane emulsion and preparation method thereof

A water-based polyurethane and anion technology, which is applied in the field of high-solid anion water-based polyurethane emulsion and its preparation, can solve the problems that the water resistance of the film of the material cannot meet the requirements, and achieve the avoidance of high viscosity, good compatibility, and simplified application process Effect

Active Publication Date: 2021-02-23
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-based polyurethane prepared by this method needs to use expensive and rare SPPG and HDI; in addition, due to its high polyether content, the water resistance of the material film still cannot meet the requirements

Method used

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  • A kind of high-solid anionic aqueous polyurethane emulsion and preparation method thereof
  • A kind of high-solid anionic aqueous polyurethane emulsion and preparation method thereof

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preparation example Construction

[0068]The preparation method of the high solid content anionic waterborne polyurethane emulsion of the present invention includes the following steps:

[0069](1) Prepolymerization: prepolymerize polyester diol, diisocyanate, and polymerization catalyst to prepare high solid content anionic waterborne polyurethane prepolymer;

[0070](2) Chain extension: the high solids anionic waterborne polyurethane prepolymer is reacted with a chain extender, a viscosity modifier, and a part of a diluent to prepare a high solids anionic waterborne polyurethane intermediate, wherein the chain extender Including non-ionic chain extenders and anionic chain extenders;

[0071](3) End-capping: reacting the high-solid-content anionic waterborne polyurethane intermediate with a blocking agent to prepare a high-solid-content anionic waterborne polyurethane polymer;

[0072](4) Emulsification: mixing and emulsifying the high solids anionic waterborne polyurethane polymer, neutralizer, remaining diluent, bath chain ex...

Embodiment 1

[0116](1) Pre-polymerization

[0117](1.1) Put the polyester diol into the reactor and raise the temperature to 70°C;

[0118](1.2) Put in diisocyanate and maintain stirring, control the temperature of the reaction system to 80°C, and maintain stirring for 20 minutes;

[0119](1.3) Maintain the temperature of the reaction system at 80°C, and put in the polymerization catalyst at a constant speed within 20 minutes;

[0120](1.4) Increase the temperature and control the temperature of the reaction system to 85° C., and keep the temperature for 90 minutes to prepare a high-solid anionic waterborne polyurethane prepolymer.

[0121](2) Chain extension

[0122](2.1) Cool down the reaction system of step (1.4) to 75°C;

[0123](2.2) Add viscosity modifier and anionic chain extender uniformly within 15 minutes, and maintain the reaction temperature at 75°C;

[0124](2.3) Control the reaction temperature to 80°C and continue to stir the reaction for 20 minutes, then lower the temperature to 77°C and continue to sti...

Embodiment 2

[0138](1) Pre-polymerization

[0139](1.1) Put the polyester diol into the reactor and raise the temperature to 75°C;

[0140](1.2) Put in diisocyanate and maintain stirring, control the temperature of the reaction system to 80°C, and maintain stirring for 25min;

[0141](1.3) Maintain the temperature of the reaction system at 80°C, and put in the polymerization catalyst at a constant speed within 15 minutes;

[0142](1.4) Increase the temperature and control the temperature of the reaction system to 85° C., and keep the temperature for 90 minutes to prepare a high-solid anionic waterborne polyurethane prepolymer.

[0143](2) Chain extension

[0144](2.1) Cool down the reaction system of step (1.4) to 80°C;

[0145](2.2) Add viscosity modifier and anionic chain extender uniformly within 15 minutes, and maintain the reaction temperature at 80°C;

[0146](2.3) Control the reaction temperature to 85°C and continue to stir the reaction for 30 minutes, then lower the temperature to 80°C and continue to stir the...

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Abstract

The invention relates to the field of spinning, and discloses an anionic waterborne polyurethane emulsion with high solid content and a preparing method thereof. The preparing method comprises the following steps of raw material preparation, prepolymerization, chain extension, end sealing and emulsifying, and thus the anionic waterborne polyurethane emulsion product with high solid content is obtained, wherein raw materials include polymerized monomers, a viscosity modifier, an additive and water. The preparing method is high in controllability and smooth in technology. The anionic waterbornepolyurethane emulsion product with high solid content prepared through the preparing method can be widely applied to elastic glue printing and coating processing of various spinning products. An appropriate quantity of polyether side chains are introduced into polyurethane macromolecules, so that the solid content of the emulsion product is obviously increased, the stability of the emulsion product is obviously improved, and meanwhile the emulsion product has low viscosity and a moderate film forming rate. Meanwhile, an appropriate quantity of crosslinking active sealing ends are also introduced into the polyurethane macromolecules, so that the elasticity of an adhesive film is high, and the anionic waterborne polyurethane emulsion is fine and smooth in handfeel and has toughness.

Description

Technical field[0001]The present invention relates to a highly solid anionized aqueous polyurethane emulsion of various types of textile products, and more particularly to a high-solid anionic aqueous polyurethane emulsion and a preparation method thereof.Background technique[0002]In the textile field, paint printing and style finishing technology is one of the most important development directions due to significant energy-saving consumption and its rich and varied finished product effects. In recent years, the consumer market has a wide range of knitted products and demand, but it is suitable for high-elastic, high-energy-containing polymers, which are suitable for needle textile coatings, but also limits the development of this industrial sector. Among them, the preparation techniques of high-solid anionic polyester waterborne polyurethane polymer resin emulsions with excellent elasticity are more relatively rare. At present, the related products based on the prior art mainly hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/42C08G18/38C08G18/34C08G18/48C08G18/32C08G18/10
CPCC08G18/10C08G18/4238C08G18/425C08G18/4833C08G18/755C08G18/7614C08G18/6674C08G18/48C08G18/348C08G18/3206C08G18/3893
Inventor 权衡刘希萌李祥王佳倪丽杰毕曙光李青李时伟熊伟
Owner WUHAN TEXTILE UNIV
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