Preparation process of sulfonate polyurethane water-based chain extender

A preparation process, polyurethane technology, applied in the direction of sulfonate preparation, organic chemistry, etc., can solve the problems of chain extender efficiency reduction, etc., to achieve the effect of speeding up the preparation speed and mixing evenly

Pending Publication Date: 2022-02-01
中科华宇(福建)科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although dropwise addition can maintain the reaction temperature very well, it will greatly reduce the efficiency of preparing chain extenders

Method used

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  • Preparation process of sulfonate polyurethane water-based chain extender
  • Preparation process of sulfonate polyurethane water-based chain extender

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Embodiment Construction

[0030] The invention discloses a preparation process of a sulfonate polyurethane water-based chain extender. Those skilled in the art can learn from the content of this article and appropriately improve the technical details to realize it. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and the relevant personnel can obviously make changes or appropriate changes and combinations to the method and application described herein without departing from the content, spirit and scope of the present invention to realize and Apply the technology of the present invention.

[0031] The applicant's research found that during the preparation of some sulfonate-type chain extenders, it is necessary to maintain the reaction temperature to avoid...

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Abstract

The invention discloses a preparation process for a sulfonate polyurethane water-based chain extender. The preparation process comprises the following steps: adding an ethylenediamine solution into a reaction kettle, and adjusting a temperature in the reaction kettle to a reaction temperature; spraying 1,3-propanesultone into the reaction kettle through an atomizing spray head, and starting a spiral propelling blade, wherein the spiral propelling blade pushes the lower-layer unreacted liquid to move upwards, the upper-layer liquid is pushed by the lower-layer unreacted liquid to move all around and then moves downwards to fill in the space of the lower-layer unreacted liquid so as to form surging stirring, the spraying range of the atomizing spray head just covers the liquid level of the ethylenediamine solution, and the amount of 1,3-propanesultone sprayed by the atomizing spray head in each direction is the same; in response to complete reaction of the ethylenediamine and the 1,3-propanesultone in the reaction kettle, adding alkali into the reaction kettle, and adjusting a pH value; and carrying out reduced-pressure distillation on the reacted liquid to remove redundant solvent, thereby obtaining the sulfonate polyurethane water-based chain extender. According to the invention, the efficiency of preparing the chain extender can be improved while a reaction temperature is maintained.

Description

technical field [0001] The invention relates to the field of chain extender preparation, in particular to a preparation process of a sulfonate polyurethane water-based chain extender. Background technique [0002] Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium, also known as water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. Water-based polyurethane uses water as a solvent, which has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. [0003] The basic principle of the preparation of water-based polyurethane is: through the reaction of the chain extender containing hydrophilic ionic groups with isocyanate groups, the ionic groups are introduced in the post-chain extension process of polyurethane, so that the polyurethane has a certain hydrophilic emulsification, thereby realizing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C309/14
CPCC07C303/32C07C309/14
Inventor 郑宾颜财彬林毅林超
Owner 中科华宇(福建)科技发展有限公司
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