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A kind of aqueous polyurethane and preparation method thereof

A technology of water-based polyurethane and polyurethane prepolymer, which is applied in the direction of textiles and papermaking, can solve the problems of difficult adjustment of viscosity, low mechanical strength, low modulus, etc., and achieve easy control of the preparation process, good storage stability, and reactivity mild effect

Inactive Publication Date: 2011-11-30
丽水市优耐克水性树脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, the object of the present invention is to prepare a kind of water-based polyurethane dispersion liquid by reacting polyisocyanate and oligomer polyol, add some functional auxiliary agents again, make the product with high mechanical strength, soft and not sticky, to overcome traditional type Waterborne polyurethane has the disadvantages of low modulus, stickiness, low mechanical strength, and difficult adjustment of viscosity. Its physical and chemical properties meet the physical requirements of various industrial fields, especially the synthetic leather industry.

Method used

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  • A kind of aqueous polyurethane and preparation method thereof
  • A kind of aqueous polyurethane and preparation method thereof
  • A kind of aqueous polyurethane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0046]Add 60g of isophorone diisocyanate (IPDI) into 150g of butanediol-adipic acid copolymer (PBA) (Mn=2000), and react at a temperature of 70°C for 120 minutes; add 45g of acetone and control the temperature of the reaction tank At 50°C, add 15g of dimethylolpropionic acid (DMPA), and continue the reaction at 70°C for 180 minutes; then control the temperature of the reaction tank at 50°C, and add 12g of triethylamine (TEA) for neutralization reaction for 30 minutes; Add 500g deionized water to carry out high-speed emulsification and disperse in the prepolymer that has been neutralized and have hydrophilicity, and add triethylenetetramine (TETA) 5.2g before NCO value drops to 1.5wt%, after chain extension reaction Continue at room temperature for 5 hours to obtain a water-based polyurethane dispersion with a solid content of 32wt%. Add a thickener and a leveling agent to the water-based polyurethane dispersion to become a finished slurry for synthetic leather. Its viscosity is...

Embodiment 2

[0048] Add 55g of isophorone diisocyanate (IPDI) into 145g of butanediol-adipic acid copolymer (PBA) (Mn=2000), and react at a temperature of 70°C for 120 minutes; add 40g of acetone and control the temperature of the reaction tank At 50°C, add 14g of dimethylolpropionic acid (DMPA), and continue the reaction at 70°C for 180 minutes; then control the temperature of the reaction tank at 50°C, and add 11g of triethylamine (TEA) for neutralization reaction for 30 minutes; Add 450g deionized water to carry out high-speed emulsification and disperse in the prepolymer that has been neutralized and have hydrophilicity, and add triethylenetetramine (TETA) 5.0g before NCO value drops to 1.5wt%, after chain extension reaction Continue at room temperature for 5 hours to obtain a water-based polyurethane dispersion with a solid content of 33 wt%. Add a thickener and a leveling agent to the water-based polyurethane dispersion to become a finished slurry for synthetic leather. Its viscosity ...

Embodiment 3

[0050] Add 60g of isophorone diisocyanate (IPDI) into 150g of butanediol-adipic acid copolymer (PBA) (Mn=2000), and react at a temperature of 65°C for 125 minutes; add 45g of acetone and control the temperature of the reaction tank At 50°C, add 15g of dimethylolpropionic acid (DMPA), and continue the reaction at 65°C for 170 minutes; then control the temperature of the reaction tank at 45°C, and add 12g of triethylamine (TEA) for neutralization reaction for 35 minutes; Add 500g deionized water to carry out high-speed emulsification and disperse in the prepolymer that has been neutralized and have hydrophilicity, and add triethylenetetramine (TETA) 5.2g before NCO value drops to 1.5wt%, after chain extension reaction Continue at room temperature for 5.5 hours to obtain a water-based polyurethane dispersion with a solid content of 32wt%. Add a thickener and a leveling agent to the water-based polyurethane dispersion to become a finished slurry for synthetic leather. The viscosity...

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Abstract

The invention provides a water-based polyurethane resin and a preparation method thereof. The resin is polymerized from aliphatic and / or alicyclic diisocyanate and polyester diol, wherein the polyester diol is composed of adipic acid and dibasic Alcohol polymerization. The present invention prepares a water-based polyurethane dispersion by reacting polyisocyanate with oligomer polyol, and then adds some functional additives to obtain a product with high mechanical strength, soft and not sticky, so as to overcome the low modulus of traditional water-based polyurethane , stickiness, low mechanical humidity, and difficult to adjust the viscosity, its physical and chemical properties meet the physical requirements of various industrial fields, especially the synthetic leather industry. At the same time, through the post-thickening compounding technology, the water-based polyurethane dispersion is made into a slurry that meets the requirements of the chemical, textile, and plastic industries, especially the industrialization requirements of synthetic leather, realizing industrial applicability.

Description

technical field [0001] The invention relates to a water-based polyurethane and a preparation method thereof, in particular to a water-based polyurethane used for synthetic leather and a preparation method thereof. Background technique [0002] Polyurethane (PU) refers to the abbreviation of Polyurethane (Polyurethane), a high polymer containing a large number of carbamate groups (-NHCOO-, also known as carbamate bonds) on the main chain. Excellent performance has been widely used in various fields of industry, agriculture and daily life. Its products include elastomer materials, coatings, adhesives, elastic fibers, synthetic leather, etc. It is a multifunctional polymer material. With the development of society and economy, it is becoming an indispensable polymer material in the development of society and economy. However, most polyurethane products are solvent-based, containing a large amount of organic solvents such as dimethylamide (DMF) and toluene, which seriously poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/42C08G18/10C08G18/32D06N3/14
Inventor 谢镇铭
Owner 丽水市优耐克水性树脂科技有限公司