Branched waterborne polyurethane leather edge oil and preparation method thereof

A water-based polyurethane and leather edge technology, applied in the field of polymer material production, can solve the problems of poor water resistance, solvent resistance and heat resistance, and achieve the effects of easy solubility, simple operation process and excellent fluidity

Pending Publication Date: 2021-02-23
GUANGDONG FION LEATHER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane uses water as a solvent to reduce the health hazards and environmental pollution caused by traditional organic solvents, but compared with traditional polyurethane, its water resistance

Method used

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  • Branched waterborne polyurethane leather edge oil and preparation method thereof
  • Branched waterborne polyurethane leather edge oil and preparation method thereof
  • Branched waterborne polyurethane leather edge oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step (1): Preparation of hydroxyl-terminated branched monomer (HPAE)

[0035] Add 10.5g of diethanolamine (DEA) and 10mL of methanol into a three-necked flask, and stir at room temperature until the DEA is completely dissolved, then measure 17mL of methyl acrylate (MA) and slowly add it dropwise to the flask. After the dropwise addition, the temperature is raised to 40 ℃, reacted for 3h, and finally obtained AB by vacuum filtration 2 monomer.

[0036] Using the nucleated "one-step method", trimethylolpropane (TMP) is the central core, according to TMP and AB 2 Molar ratio is 1:3 and takes by weighing TMP, and catalyst p-toluenesulfonic acid is 2% (AB 2 Monomer and TMP mass and percentage), and AB 2 The monomer was slowly added dropwise to the three-neck flask. Raise the temperature to 110°C and start stirring, and react for 2.5 hours. After the reaction is stopped, the crude product is evaporated in vacuo, dissolved in acetone, reprecipitated with dichloromethane, a...

Embodiment 2

[0044] Step (1): Preparation of hydroxyl-terminated branched monomer (HPAE)

[0045] Add 10.5g of diethanolamine (DEA) and 10mL of methanol into a three-necked flask, and stir at room temperature until DEA is completely dissolved, then measure 17mL of methyl acrylate (MA) and slowly drop it into the flask. After the dropwise addition, the temperature is raised to 35 ℃, reacted for 3.5h, and finally obtained AB by vacuum filtration 2 monomer.

[0046] Using the nucleated "one-step method", trimethylolpropane (TMP) is the central core, according to TMP and AB 2 Molar ratio is 1:3 and takes by weighing TMP, and catalyst p-toluenesulfonic acid is 2% (AB 2 Monomer and TMP mass and percentage), and AB 2 The monomer was slowly added dropwise to the three-neck flask. Raise the temperature to 120°C and start stirring, and react for 2 hours. After the reaction stops, the crude product is evaporated in vacuo, dissolved in acetone, reprecipitated with dichloromethane, and extracted wi...

Embodiment 3

[0050] Step (1): Preparation of hydroxyl-terminated branched monomer (HPAE)

[0051] Take 10.5g of diethanolamine (DEA) and 10mL of methanol into a three-necked flask, and stir at room temperature until the DEA is completely dissolved, then measure 17mL of methyl acrylate (MA) and slowly add it dropwise to the flask, and after the dropwise addition, the temperature is raised to 30 ℃, reacted for 4h, and finally obtained AB by vacuum filtration 2 monomer.

[0052] Using the nucleated "one-step method", trimethylolpropane (TMP) is the central core, according to TMP and AB 2 Molar ratio is 1:3 and takes by weighing TMP, and catalyst p-toluenesulfonic acid is 2% (AB 2 Monomer and TMP mass and percentage), and AB 2 The monomer was slowly added dropwise to the three-neck flask. Raise the temperature to 100°C and start stirring, and react for 3 hours. After the reaction stops, the crude product is evaporated in vacuo, dissolved in acetone, reprecipitated with dichloromethane, and...

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Abstract

The invention discloses branched waterborne polyurethane leather edge oil and a preparation method thereof, belonging to the technical field of high polymer material production. The method comprises the following steps: preparing a branched monomer containing an active group, namely a terminal hydroxyl group, subjecting the hydroxyl group and an isocyanate group contained in a waterborne polyurethane prepolymer to a cross-linking reaction, and conducting internal emulsification to prepare the branched monomer modified waterborne polyurethane leather edge oil. The method is simple in syntheticroute, easy to operate, safe and reliable, and promotes the development of sustainable and eco-friendly materials.

Description

technical field [0001] The invention belongs to the technical field of polymer material production, and in particular relates to a branched water-based polyurethane leather edge oil and a preparation method thereof. Background technique [0002] Leather edge oil, also known as leather edge oil or edge sealing agent, is a kind of beautifying and modifying agent widely used in the trimming or edge of leather or synthetic leather products such as shoes, bags, ticket holders, mobile phone cases, belts, etc. Pigmented semi-liquid paint. The main component of leather edge oil is resin, that is, polyurethane resin, so its own performance and use effect directly depend on the basic properties of polyurethane resin. Therefore, by changing the performance of polyurethane, we can expect to obtain leather edge oil with excellent performance. [0003] The main features of waterborne polyurethane (WPU) are pollution-free, safe and reliable, excellent mechanical properties, good compatib...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/34C08G18/32C08G18/12
CPCC08G18/755C08G18/4854C08G18/6692C08G18/12C08G18/348C08G18/3206C08G18/3278
Inventor邵庆涛郭悦强涛涛黄仕明
OwnerGUANGDONG FION LEATHER CO LTD