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Waterborne polyurethane resin for toluene reduced ultrafine fiber base and preparation method and application of waterborne polyurethane resin

A water-based, polyurethane resin technology for bass, applied in the field of polyurethane resin, can solve the problems of poor toluene resistance, unable to prepare water-based microfiber bass, etc., and achieve the effect of reducing production cost, soft and plump hand, and good elasticity.

Active Publication Date: 2020-02-04
JIANGSU HUADA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing water-based polyurethane resin is used in the production process of toluene-reduced superfine fiber bass. After the toluene reduction treatment, due to the poor toluene resistance of the resin, the resin is extracted together with the low-density polyethylene during the extraction process, and the toluene is lost. The significance of extraction, after extraction, the bass is often in a dense state, and the resin cannot form an effective support, so it is impossible to prepare a truly valuable water-based microfiber bass

Method used

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  • Waterborne polyurethane resin for toluene reduced ultrafine fiber base and preparation method and application of waterborne polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A water-based polyurethane resin for toluene-reduced superfine fiber bass provided in this example is prepared by the following method:

[0040]Add 200 grams of PTMG-2000 and 100 grams of polycarbonate diol with a molecular weight of 2000 into the reaction flask, start stirring and raise the temperature to 120°C for vacuum dehydration for 1 hour, then lower it to 55°C, add 68.7g of pure MDI and 61 grams of IPDI, keep warm at 70-95°C for 2.5 hours, then add 11.5 grams of 1.4-butanediol, keep warm for 1.5 hours, then add 16.7 grams of DMPA, keep warm for 2 hours, then measure NCO to reach the theoretical value, then cool down to 55 ℃, add 250 grams of acetone, stir for 1 hour, then add 11.5 grams of triethylamine for neutralization, transfer to an emulsification tank after 1 hour of neutralization, and cool down to 40 ℃, add 500 g of distilled water for emulsification, emulsification time is 50 minutes, emulsification After finishing, add 8.0g A95 and carry out chain exte...

Embodiment 2

[0042] A water-based polyurethane resin for toluene-reduced superfine fiber bass provided in this example is prepared by the following method:

[0043] Add 200 grams of PTMG-2000 and 100 grams of polycaprolactone diol with a molecular weight of 2000 into the reaction flask, start stirring and heat up to 120°C for vacuum dehydration for 1 hour, then drop to 55°C, add 68.7g of pure MDI and 61 Gram IPDI, keep warm at 70-95°C for 2.5 hours, then add 11.5 grams of 1.4-butanediol, continue to keep warm for 1.5 hours, then add 16.7 grams of DMPA, continue to keep warm for 2 hours, and then cool down to 55°C after passing the NCO test. Add 250 grams of acetone, stir for 1 hour, then add 11.5 grams of triethylamine for neutralization, transfer to an emulsification tank after 1 hour of neutralization, and lower the temperature to 40°C, add 500 grams of distilled water for emulsification, and the emulsification time is 40 minutes. Add 8.0g of A95 for chain extension reaction, the reactio...

Embodiment 3

[0045] A water-based polyurethane resin for toluene-reduced superfine fiber bass provided in this example is prepared by the following method:

[0046] Add 200 grams of PTMG-2000 and 100 grams of polyhexamethylene adipate diol with a molecular weight of 2000 into the reaction flask, start stirring and raise the temperature to 120°C for vacuum dehydration for 1 hour, then lower it to 55°C, and add 68.7g of Pure MDI and 61 grams of IPDI, keep warm at 70-95°C for 2.5 hours, then add 11.5 grams of 1.4-butanediol, keep warm for 1.5 hours, then add 16.7 grams of DMPA, keep warm for 2 hours, then cool down after passing the NCO test To 55°C, add 250g of acetone, stir for 1 hour, then add 11.5g of triethylamine for neutralization, transfer to an emulsification tank after 1 hour of neutralization, and cool down to 40°C, add 500g of distilled water for emulsification, and the emulsification time is 30 minutes After the emulsification is completed, add 8.0g A95 for chain extension reacti...

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Abstract

The invention relates to a waterborne polyurethane resin for a toluene reduced ultrafine fiber base and a preparation method and application of the waterborne polyurethane resin. The waterborne polyurethane resin is prepared by the following methods: performing a stirring reaction on polyester polyol, polyether polyol and diisocyanate at a temperature of 65-95 DEG C for 1-3 hours, successively adding a glycol type chain extension agent and a carboxylic acid type hydrophilic chain extender, and performing a chain extension reaction respectively so as to obtain a prepolymer; and cooling the prepolymer to a temperature less than or equal to 60 DEG C, adding a low boiling point solvent, performing uniform stirring, adding a neutralizing reagent, performing stirring for 0.5-2 hours, performingcooling to a temperature less than or equal to 40 DEG C, adding water, performing emulsion, after emulsion is completed, firstly adding a hydrophilic chain extender and a diamine type chain extender,performing chain extension respectively, after the operation, increasing the temperature greater than or equal to 70 DEG C, performing vacuum desorption of the solvent, and performing cooling and discharge, so as to obtain the waterborne polyurethane resin. The resin is used in preparation of the toluene reduced ultrafine fiber base, and the obtained base is high in bass thickness retention rate,soft and plump in hand feel, good in elasticity, high in tensile strength and good in tear resistance.

Description

technical field [0001] The invention belongs to the technical field of polyurethane resins, and in particular relates to a water-based polyurethane resin for toluene-reduced superfine fiber basses, a preparation method and application thereof. Background technique [0002] At present, the polyurethane resin used in the production process of toluene-reduced microfiber bass is usually a solvent-based polyurethane resin, with a solid content of 30-35% and a solvent content of 65-70%. The solvent is mainly N,N-dimethyl methyl formamide (DMF). Although the microfiber bass processing factories all have DMF recovery devices, the recovered material is not higher than 95%, and about 5% of the solvent still enters the environment, which poses a potential threat to the human living environment. [0003] Water-based polyurethane uses water as the dispersion medium. It is non-toxic, non-polluting, safe and environmentally friendly. It is a non-dangerous product and has a low hazard leve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/44C08G18/48C08G18/42C08G18/32C08G18/34C08G18/38D06M15/564
CPCC08G18/6625C08G18/6618C08G18/6607C08G18/4018C08G18/44C08G18/4854C08G18/348C08G18/3855C08G18/4277C08G18/4238D06M15/564
Inventor 王胜军
Owner JIANGSU HUADA NEW MATERIAL CO LTD
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