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Waterborne polyurethane resin for waterborne clothing leather base and preparation method thereof

A technology of water-based polyurethane and resin, which is applied in the direction of textiles and papermaking, etc., can solve the problems of water-based clothing leather base development limitations, poor clothing leather structure, poor air permeability, etc., to avoid pollution and human health hazards, soft hand feel, The effect of high fullness

Inactive Publication Date: 2017-07-14
HEFEI KETIAN WATERBORNE TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to technical restrictions on the use of water-based polyurethane resin for garment leather, the development of water-based garment leather is limited, especially in terms of hard handle, poor tightness of garment leather structure and poor air permeability.

Method used

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  • Waterborne polyurethane resin for waterborne clothing leather base and preparation method thereof
  • Waterborne polyurethane resin for waterborne clothing leather base and preparation method thereof
  • Waterborne polyurethane resin for waterborne clothing leather base and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Dehydrate 80g of polytetrahydrofuran ether polyol (molecular weight: 3000) at 105°C for 1 hour, then cool down to 50°C, add 15g of toluene diisocyanate, raise the temperature to 90°C and keep it warm for 3 hours, measure the NCO content in two hours, and reach the theoretical value After cooling down to 50°C, add 2g of dimethylolbutyric acid and 1.5g of ethylene glycol to react at 80°C for 2h, cool down to 50°C, then add 0.2g of organic bismuth Coscat83 and 2ml of acetone to adjust the viscosity. React for 2.5 hours, measure the NCO content after the reaction is over, then cool down to 0°C, add 2.32g of triethylamine for neutralization, after neutralization for 30 minutes, add deionized water under high-speed shear, disperse for 2 minutes, and then slowly add 10g of poly Ether amine (molecular weight is 2000), the acetone in the system is distilled off under reduced pressure, promptly obtains waterborne polyurethane resin sample 1.

Embodiment 2

[0038] Dehydrate 78g of polyethylene oxide polyol (molecular weight: 3000) at 105°C for 1 hour, then cool down to 50°C, add 15g of isophorone diisocyanate, raise the temperature to 90°C and keep it warm for 3 hours, then measure NCO in two hours After reaching the theoretical value, cool down to 50°C, then add 2g of dimethylolbutyric acid and 1.5g of glycerin to react at 80°C for 2 hours, cool down to 50°C, then add 0.15g of organic bismuth 1610 and 2ml of acetone to adjust the viscosity, React at 70°C for 2.5h, measure the NCO content after the reaction is over, then cool down to 0°C, add 2.12g of triethylamine for neutralization, after neutralization for 30min, add deionized water under high-speed shear, disperse for 2min, then slowly add 20g of polyether amine (molecular weight: 2000), acetone in the system was distilled off under reduced pressure to obtain water-based polyurethane resin sample 2.

Embodiment 3

[0040] Dehydrate 75g of polyester ether polyol (molecular weight: 3000) at 105°C for 1 hour, then cool down to 50°C, add 15g of 1,6-hexamethylene diisocyanate, raise the temperature to 90°C and keep it warm for 3 hours, then measure the NCO content in two hours After reaching the theoretical value, cool down to 50°C, then add 2g of dimethylol octanoic acid, 1.5g of ethylene glycol to react at 80°C for 2h, cool down to 50°C, then add 0.2g of organic bismuth 2010 and 2ml of acetone to adjust the viscosity. React at 70°C for 2.5h, measure the NCO content at the end of the reaction, then cool down to 0°C, add 2.51g of triethylamine for neutralization, after neutralization for 30min, add deionized water under high-speed shearing, disperse for 2min, then slowly add 15g of polyetheramine (molecular weight: 2000), acetone in the system was distilled off under reduced pressure to obtain waterborne polyurethane resin sample 3.

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Abstract

The invention provides waterborne polyurethane resin for waterborne clothing leather base and a preparation method thereof. The waterborne polyurethane resin comprises the following raw materials (by weight): 70-85 parts of macromolecular polyol, 10-20 parts of polyisocyanates, 1.5-3.5 parts of a hydrophilic chain-extender, 0.5-2 parts of a micromolecular alcohol chain-extender, 6-25 parts of an amine chain-extender, 0.01-0.5 part of a catalyst and 2-5 parts of a salt forming agent. By the use of the ether-bonded macromolecular polyol with large molecular weight, the waterborne polyurethane resin has low modulus modulus and soft hand-feeling. The amine chain-extender used in the invention is polyetheramine. In comparison with other amine chain-extenders, main chain of polyetheramine is a polyether structure such that waterborne polyurethane feels softer; and polyetheramine has large molecular weight such that solid content of the waterborne polyurethane resin is greatly enhanced so as to raise fullness of the waterborne polyurethane resin.

Description

technical field [0001] The invention relates to the field of high-molecular polymers, and specifically discloses a water-based polyurethane resin used for water-based clothing leather bases and a preparation method thereof. Background technique [0002] The current solvent-based garment leather base uses a large amount of organic solvent DMF in the manufacturing process, which not only pollutes the environment, but also endangers the health of consumers due to the residual solvent in the product. Water-based polyurethane resin uses water as the dispersion medium, and no toxic organic solvents are needed during processing, which avoids environmental pollution and health hazards to operators. Water-based polyurethane resins are widely used in the field of garment leather. Water-based synthetic leather does not contain organic solvents such as benzene series and DMF. It has the advantages of non-toxic and environmental protection, and is loved by more and more consumers. Howev...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/08C08G18/12C08G18/32C08G18/34C08G18/40C08G18/48C08G18/50C08G18/61D06N3/00D06N3/14
Inventor 汪飞戴家兵李维虎赵曦赵春娥王浩志
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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