Waterborne polyurethane resin and preparation method of dipping sizing agent for synthetic leather base material

A water-based polyurethane and synthetic leather base material technology, which is applied in textiles, papermaking, fiber treatment, etc., to achieve good tensile strength, good softness and resilience, and reduce the use and emission of solvents

Inactive Publication Date: 2009-12-30
烟台道成化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the water-based polyurethane resin used for impregnating non-woven fabrics to prepare synthetic leather and artificial leather substrates is still in the research stage

Method used

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  • Waterborne polyurethane resin and preparation method of dipping sizing agent for synthetic leather base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The first step is to prepare the prepolymer: isophorone diisocyanate 100g, polytetrahydrofuran glycol ether 202g, polycaprolactone glycol ester 81.2g, dimethylol propionic acid 16.8g;

[0034] The second step is to prepare water-based polyurethane resin: add triethylamine to the prepolymer and emulsify it in water, and the solid content after emulsification is 30%;

[0035] The third step is to obtain a stable dipping water-based polyurethane resin slurry: add Wet-245: 8.9g, Rheolate-255: 11.2g, and A-321: 5.6g to the water-based polyurethane resin.

[0036] The specific technological process of the impregnated slurry for the synthetic leather base material of the present embodiment is as follows:

[0037] 1. Processing of prepolymer: Put 100g of isophorone diisocyanate, 202g of polytetrahydrofuran glycol ether, and 81.2g of polycaprolactone into a reaction kettle equipped with mechanical stirring and temperature controller, stir, and heat up 16.8 grams of dimethylolpr...

Embodiment 2

[0041] The first step is to prepare the prepolymer: 100g of isophorone diisocyanate, 212.6g of polytetrahydrofuran glycol ether, 148g of polyoxypropylene glycol ether, and 19.7g of dimethylol butyric acid;

[0042] The second step is to prepare water-based polyurethane resin: after adding triethylamine to the prepolymer at 40°C, it is emulsified in water, and the solid content after emulsification is 25%;

[0043] The third step is to obtain a stable dipping water-based polyurethane resin slurry: add Wet-260: 19g, Rheolate-278: 28.5g, and A-321: 5.7g to the water-based polyurethane resin.

[0044] The specific technological process of the impregnated slurry for the synthetic leather base material of the present embodiment is as follows:

[0045] 1. Processing of prepolymer: Put 100g of isophorone diisocyanate, 212.6g of polytetrahydrofuran glycol ether, and 148g of polyoxypropylene glycol ether into a reaction kettle equipped with mechanical stirring and temperature controller...

Embodiment 3

[0049] The difference between the preparation method of a kind of synthetic leather substrate dipping slurry of the present example and embodiment 1 is:

[0050] The first step is to prepare the prepolymer: diphenylmethane 4.4-diisocyanate 100g, polyoxypropylene glycol ether 190.6g, polyneopentyl glycol adipate 63.5g, dimethylol propionic acid 15.9g;

[0051] The second step is to prepare water-based polyurethane resin: add triethylamine to the prepolymer at 35°C to emulsify it in water, and the solid content after emulsification is 30%;

[0052] The third step is to obtain a stable dipping water-based polyurethane resin slurry: add Wet-270: 13.2g, TRM203 12.5g, AMP-95: 6.4g to the water-based polyurethane resin.

[0053] The specific technological process of the impregnated slurry for the synthetic leather base material of the present embodiment is as follows:

[0054] 1. Processing of prepolymer: put 100g of diphenylmethane 4.4-diisocyanate, 190.6g of polyoxypropylene glycol ...

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Abstract

The invention relates to a preparation method of waterborne polyurethane dipping sizing agent for synthetic leather base material, belonging to the technical field of chemical products and a preparation method thereof. The preparation method is characterized in that diisocyanate, polyester polyol, polyether polyol and hydrophilic chain-extending agent carry out polymerization to generate prepolymer; the prepolymer is reacted with a neutralizer to carry out water dispersion emulsification to generate a waterborne polyurethane resin; and the waterborne polyurethane resin, wetting agent, thickener and stabilizer are reacted to generate synthetic leather base material dipping sizing agent. In the preparation method for synthesizing the leather base material dipping sizing agent by the waterborne polyurethane, synthetic leather and artificial leather base material manufactured after an ultrafine non-woven fabric is dipped in the dipping sizing agent have favorable performance, soft handle, favorable elasticity and stronger tear strength and tensile strength. In addition, the use and the discharge of organic solvent in a manufacture process is greatly reduced, the energy consumption and the environmental pollution is reduced to the maximum extent, and the invention has a wide popularization and application prospect.

Description

1. Technical field [0001] The invention relates to a preparation method of water-based polyurethane resin and a method for impregnating ultra-fine non-woven fabrics with water-based polyurethane resin to prepare synthetic leather and artificial leather substrates, belonging to the technical field of chemical products and preparation methods thereof. 2. Background technology [0002] At present, solvent-based polyurethane resin is used as the basic raw material for the base layer and surface layer of traditional synthetic leather products, and its production process mostly uses toluene and dimethylformamide (DMF) as solvents. Although 95% of the solvents in the grass-roots wet production are recycled, some of them cannot be recycled, which not only causes a lot of waste of organic solvents and energy, but also inevitably seriously affects the ecological environment. The latest ecological standards of the European Community have also newly defined the scope of use of toxic and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/76C08G18/73D06M15/572D06M15/568D06N3/14
Inventor 郑玉
Owner 烟台道成化学有限公司
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