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Water-based polyurethane shoe adhesive with low viscosity and high bonding strength and preparation method thereof

A water-based polyurethane and adhesive technology, applied in the field of water-based polyurethane, can solve the problems of unsatisfactory peel strength, affecting leveling, and increasing the amount of glue, so as to achieve easy recycling, improve stability, and reduce the amount of glue. Effect

Active Publication Date: 2019-03-01
汕头市龙湖昌丰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in production practice, it is found that the existing water-based polyurethane shoe adhesives on the market have high viscosity, resulting in poor fluidity, which in turn affects its leveling and increases the amount of glue applied. If the viscosity is lowered, The adhesive strength becomes lower again. For the bonding of low polar shoe materials such as SBS, the peel strength often cannot meet the requirements. Therefore, it is necessary to look for a water-based polyurethane shoe with low viscosity and high adhesive strength. Adhesives are the subject of research by those skilled in the art

Method used

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  • Water-based polyurethane shoe adhesive with low viscosity and high bonding strength and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 6 g of sulfonated polyester polyol with a molecular weight of 3000 and 6 g of 1,6-hexanediol adipate with a molecular weight of 2000 into a 500 mL four-necked flask equipped with a thermometer, a stirrer and a reflux condenser, Raise the temperature to about 120°C for dehydration for 30 minutes. After dehydration, cool down to about 80°C. Add 7.5g of 4,4-dicyclomethane diisocyanate, 3g of hexamethylene diisocyanate and 2.5g of trimethylolpropane. Then heat up to 95°C and keep it warm for 3 hours; cool the reaction product to about 60°C and add 2.7g of 1,6 hexanediol, 3g of trimethylpentanediol, 1.8g of dimethylol butyric acid, then heat up to 85°C to expand Chain reaction for 2 hours, after 2 hours of reaction, take samples to measure the content of -NCO in the reactant until it is close to the theoretical value (titration with di-n-butylamine titration method), add 28g of acetone during the reaction to adjust the viscosity, and cool to 40 after the reaction reaches ...

Embodiment 2

[0033] Add 6 g of sulfonated polyester polyol with a molecular weight of 3000 and 6 g of poly(1,6-hexanediol adipate) with a molecular weight of 2000 into a 500 mL four-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and heat up Dehydrate at about 120°C for 30 minutes, after dehydration, cool down to about 80°C, add 1.5g trimethylolpropane and keep it warm for 1 hour, then cool down to about 70°C, add 6g 4,4-dicyclomethane diisocyanate and 4g Hexamethylene diisocyanate, after the addition, heat up to 95°C and keep it warm for 2 hours; cool the reaction product to about 60°C and add 2.5g of 1,6-hexanediol, 2g of trimethylpentanediol, and 1.8g of dimethylol Butyric acid, then heat up to 85°C for chain extension reaction for 2 hours, after 2 hours of reaction, take a sample to measure the content of -NCO in the reactant until it is close to the theoretical value (titration with di-n-butylamine titration), add 28g of acetone during the reaction to adjust...

Embodiment 3

[0035] Add 6 g of sulfonated polyester polyol with a molecular weight of 3,000 and 10 g of poly(1,6-hexanediol adipate) with a molecular weight of 2,000, and 1 g of trimethylolpropane into a 500 mL vessel equipped with a thermometer, a stirrer, and a reflux condenser In a four-neck flask, heat up to about 120 °C for 30 minutes to dehydrate. After dehydration, cool down to about 70 °C, add 4.5g of 4,4-dicyclomethane diisocyanate and 4.5g of hexamethylene diisocyanate, after the addition Heat up to 95°C and keep it warm for 2 hours; cool the reaction product to about 60°C and add 3g of 1,6 hexanediol, 1.5g of trimethylpentanediol, 3g of dimethylol butyric acid, then heat up to 85°C for chain extension reaction 2 hours, after 2 hours of reaction, take a sample to measure the content of -NCO in the reactant until it is close to the theoretical value (titration with di-n-butylamine titration method), add 22g of acetone during the reaction to adjust the viscosity, and cool to 40 °C a...

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Abstract

The invention provides a low-viscosity high-bonding-strength waterborne polyurethane adhesive for shoes. The adhesive for the shoes is prepared from the following components in percentage by weight through polymerization: 3%-5% of hexamethylene diisocyanate, 5%-8% of 4,4'-dicyclohexylmethane diisocyanate, 5%-7% of sulfonated polyester polyol, 5%-10% of poly(1,6-hexamethylene adipate), 0.5%-2% of sodium dodecyl benzene sulfonate, 1.5%-3% of trimethylpentanediol (TMPD), 1%-3% of dimethylolbutanoic acid, 8%-11% of acetone, 0.5%-2% of triethylamine and 10%-50% of deionized water. Due to low adhesive, high bonding strength and good heat resistance and water resistance of the adhesive, the construction is greatly facilitated in the production process of adhesive shoes, so that the glue quantity of the shoes is reduced, the quality can be guaranteed, and the cost is saved. The invention further provides a preparation method of the low-viscosity high-bonding-strength waterborne polyurethane adhesive for the shoes.

Description

technical field [0001] The invention relates to a water-based polyurethane, in particular to a water-based polyurethane which can be used as an adhesive for shoes, and more particularly relates to a water-based polyurethane adhesive for shoes with low viscosity and high bonding strength. The present invention also relates to a preparation method of the above-mentioned water-based polyurethane shoe adhesive. Background technique [0002] my country is the world's largest producer, consumer and exporter of footwear products, with an annual output of more than 10 billion pairs, most of which are adhesive shoes. The development of shoe adhesives is also a process from low-grade to high-grade, from The process of developing from non-environmental protection to environmental protection. With the improvement of global environmental protection awareness and the intensification of the oil crisis, environmentally friendly solvent-free and water-based adhesives for shoes have emerged; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/08C08G18/32C08G18/34C08G18/42C08G18/46C08G18/66C08G18/72C08G18/73C08G18/75
CPCC08G18/0823C08G18/3206C08G18/348C08G18/4202C08G18/4238C08G18/4676C08G18/6659C08G18/722C08G18/73C08G18/751C09J175/06
Inventor 田慧王林王俊博
Owner 汕头市龙湖昌丰化工有限公司
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