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Hyperbranched organic amino silicon post-chain-extension modified waterborne polyurethane and preparation method thereof

A technology of water-based polyurethane and organic amino group, applied in the field of high-molecular water-based polyurethane, can solve the problems of insufficient mechanical properties change, unfavorable, limited degree of improvement, etc., and achieve good industrial production prospects, reduce production costs, and improve the effect of contact angle.

Active Publication Date: 2022-01-21
山东圳谷新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing organic small molecule silicon-modified waterborne polyurethane can improve the contact angle to a certain extent, the degree of improvement is limited, and the change in mechanical properties is not obvious enough, which still cannot meet the needs of practical applications.
In the prior art, polymer organosiloxane is used to modify water-based polyurethane, although its contact angle is greatly improved, but its mechanical properties are greatly reduced, and the addition of polymer organosiloxane will make the system Increased viscosity increases the amount of organic solvents and increases industrial costs, which is unfavorable for industrial production
In addition, the salt spray resistance performance is rarely tested in the existing literature or patents

Method used

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  • Hyperbranched organic amino silicon post-chain-extension modified waterborne polyurethane and preparation method thereof
  • Hyperbranched organic amino silicon post-chain-extension modified waterborne polyurethane and preparation method thereof
  • Hyperbranched organic amino silicon post-chain-extension modified waterborne polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In a four-neck flask equipped with a thermometer probe, serpentine condenser, mechanical stirring rod, and nitrogen inlet, add 15.0 g of isophorone diisocyanate (IPDI), 45.0 g of polyadipate-1,4-butanediol Ester diol (PBA, Mn=2000), 0.005g of dibutyltin dilaurate (DBTDL), need to pass nitrogen gas for 5min before adding the medicine. Ensure that the bottle is a nitrogen atmosphere, react at 80°C for 100min, then add 3.0g dimethylolpropionic acid (DMPA), react at 80°C for 90min, then add 1.0g trimethylolpropane (TMP), at 80°C Reaction at ℃ for 60 minutes, when the -NCO of the system measured by the n-dibutylamine method reaches the theoretical requirement, lower the temperature of the system to 45 ℃, add 2.04g of triethylamine, and react at 40 ℃ for 20 minutes to neutralize the acid in the system , A total of 30ml of organic solvent acetone was added during the reaction; 1.0g of diethylenetriamine was added to 120ml of deionized water, emulsified at 30°C for 10min to obt...

Embodiment 2

[0054] In a four-neck flask equipped with a thermometer probe, serpentine condenser, mechanical stirring rod, and nitrogen inlet, add 15.0 g of isophorone diisocyanate (IPDI), 40.0 g of polyadipate-1,4-butanediol Ester diol (PBA, Mn=2000), 0.005g of dibutyltin dilaurate (DBTDL), need to pass nitrogen gas for 5min before adding the medicine. Ensure that the bottle is a nitrogen atmosphere, react at 80°C for 100min, then add 3.2g dimethylolpropionic acid (DMPA), react at 80°C for 90min, then add 1.2g trimethylolpropane (TMP), at 80°C Reaction at ℃ for 60 minutes, when the -NCO of the system measured by the n-dibutylamine method reaches the theoretical requirement, lower the temperature of the system to 45 ℃, add 2.18g of triethylamine, and react at 40 ℃ for 20 minutes to neutralize the acid in the system , A total of 25ml of organic solvent acetone was added during the reaction; 0.6g of diethylenetriamine was added to 120ml of deionized water, and emulsified at 30°C for 10min to...

Embodiment 3

[0056] In a four-necked flask equipped with a thermometer probe, serpentine condenser, mechanical stirring rod, and nitrogen inlet, add 20.0 g of isophorone diisocyanate (IPDI), 60.0 g of polyadipate-1,4-butanediol Ester diol (PBA, Mn=2000), 0.005g of dibutyltin dilaurate (DBTDL), need to pass nitrogen gas for 5min before adding the medicine. Ensure that the bottle is a nitrogen atmosphere, react at 80°C for 100min, then add 4.0g of dimethylolpropionic acid (DMPA), react at 80°C for 90min, then add 1.5g of trimethylolpropane (TMP), at 80°C Reaction at ℃ for 60 minutes, when the -NCO of the system measured by the n-dibutylamine method reaches the theoretical requirement, lower the temperature of the system to 45 ℃, add 2.35g of triethylamine, and react at 40 ℃ for 20 minutes to neutralize the acid in the system , A total of 35ml of organic solvent acetone was added during the reaction; 1.8g of diethylenetriamine was added to 120ml of deionized water, and emulsified at 30°C for ...

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Abstract

The invention belongs to the technical field of macromolecular waterborne polyurethane, the method comprises the following steps: 1, mixing micromolecular siloxane, deionized water, absolute ethyl alcohol and acid, and reacting under the protection of nitrogen to obtain a product I, namely hyperbranched organic silicon with amino; 2, enabling diisocyanate, dihydric alcohol and a catalyst to react under inert atmosphere protection; then, adding a hydrophilic chain extender, a cross-linking agent, a neutralizer and an organic solvent for continuous reaction to obtain primary waterborne polyurethane; putting the primary waterborne polyurethane and an amine chain extender into water, uniformly mixing, and emulsifying to obtain a primary waterborne polyurethane prepolymer emulsion; and 3, mixing the product I with the primary waterborne polyurethane prepolymer emulsion for reaction, and removing the organic solvent to obtain the hyperbranched organic amino silicon modified waterborne polyurethane emulsion. The prepared modified waterborne polyurethane emulsion has excellent mechanical properties, good water resistance, low water absorption, good temperature change resistance, salt fog resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer water-based polyurethane, and relates to a chain-extended modified water-based polyurethane after hyperbranched organoaminosilicon and a preparation method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The introduction of hydrophilic groups into waterborne polyurethanes results in inferior water resistance, mechanical properties, high temperature resistance, and drying time compared to traditional solvent-based polyurethanes. Although the existing organic small molecule silicon-modified waterborne polyurethane can improve the contact angle to a certain extent, the degree of improvem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/42C08G18/34C08G18/32C08G18/12C08G18/61
CPCC08G18/12C08G18/755C08G18/4238C08G18/348C08G18/6659C08G18/3206C08G18/61
Inventor 杨延钊李永年郭松
Owner 山东圳谷新材料科技有限公司
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