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Waterborne polyurethane resin and preparation method thereof

A water-based polyurethane and resin technology, applied in the field of water-based polyurethane resin and its preparation, can solve the problems of water-based polyurethane water resistance, solvent resistance, mechanical strength, poor plumpness, etc. The effect of feel plumpness

Inactive Publication Date: 2020-02-28
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Water-based polyurethane products have poor water resistance, solvent resistance, mechanical strength, and fullness, which limit their application fields to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Accurately weigh 60g of polyoxypropylene triol (number average molecular weight of 3000), 100g of polytetrahydrofuran ether diol (number average molecular weight of 1000), 20g of castor oil, 2g of organic montmorillonite, vinyl trimethoxy 0.5g of methyl silane, 56g of toluene diisocyanate, 7.2g of dimethylolpropionic acid, 4g of trimethylolpropane, 3g of diethylene glycol, 0.2g of bismuth neodecanoate, 80g of acetone, 5.5g of triethylamine, 600g deionized water, 3g wetting agent, 0.5g defoamer, 4.5g softening aid;

[0042] Step 2: Modification of organic montmorillonite: Take vinyltrimethoxysilane, make it into a 10% aqueous solution, and hydrolyze it for 20 minutes at room temperature; take in montmorillonite, make it into a 5% aqueous solution, swell it at room temperature for 2 hours, and use a high-speed disperser Stir and disperse for 30min, then transfer the montmorillonite aqueous solution to a round-bottomed flask equipped with a stirrer, a temperature m...

Embodiment 2

[0050] Step 1: Accurately weigh 48g of polyoxypropylene triol (number average molecular weight of 3000), 200g of polyoxypropylene diol (number average molecular weight of 8000), and polycaprolactone diol (number average molecular weight of 1000) 82g, castor oil 26g, organic montmorillonite 5g, γ-(2,3-epoxypropoxy)propyltrimethoxysilane 1.2g, isophorone diisocyanate 89g, dimethylolpropionic acid 14.8g, Trimethylolpropane 3g, neopentyl glycol 3.1g, 1,6-hexanediol 5.4g, bismuth neodecanoate 0.4g, acetone 140g, sodium hydroxide 1.2g, dimethylaminoethanol 5.5g, deionized water 1120g, leveling agent 4.6g, defoamer 0.8g, softening aid 9.6g;

[0051] Step 2: Modification of organic montmorillonite: take γ-(2,3-glycidyloxypropoxy)propyltrimethoxysilane, make it into a 10% aqueous solution, and hydrolyze it for 30 minutes at room temperature; take it into montmorillonite, and make it into 10% aqueous solution, swell at room temperature for 3 hours, stir and disperse with a high-speed d...

Embodiment 3

[0059] Step 1: Accurately weigh 80g of polyoxypropylene diol (number average molecular weight of 4000), 100g of polytetrahydrofuran diol (number average molecular weight of 1000), 40g of castor oil, 2.5g of organic montmorillonite, 3-aminopropyl Triethoxysilane 0.6g, 4,4-dicyclohexylmethane diisocyanate 100g, dimethylolbutanoic acid 10.8g, trimethylolpropane 6g, 1,8-octanediol 15g, bismuth neodecanoate 0.3g, acetone 120g, dimethylaminoethanol 6.5g, deionized water 825g, wetting agent 3.5g, defoamer 0.56g, softening aid 5.7g;

[0060] Step 2: Modification of organic montmorillonite: take 3-aminopropyltriethoxysilane, make it into a 10% aqueous solution, and hydrolyze it for 30 minutes at room temperature; take in montmorillonite, make it into an 8% aqueous solution, and swell it at room temperature for 2.5 hours , use a high-speed disperser to stir and disperse for 50 minutes, then transfer the montmorillonite aqueous solution to a round-bottomed flask equipped with a stirrer, ...

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PUM

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Abstract

The invention relates to waterborne polyurethane resin and a preparation method thereof, and belong to the technical field of high polymer materials, and the waterborne polyurethane resin comprises the following substances in parts by weight: 160-330 parts of polymer polyol, 20-40 parts of castor oil, 2-5 parts of organic montmorillonite, 0.5-1.2 parts of a silane coupling agent, 56-100 parts of polydiisocyanate, 7.2 to 14.8 parts of hydroxymethyl acid, 7 to 21 parts of hydroxyl type small molecule polyhydric alcohol, 0.2 to 0.4 part of a catalyst, 80 to 140 parts of acetone, 5.5 to 7.5 partsof a neutralizer, 600 to 1120 parts of deionized water and 8 to 15 parts of an auxiliary agent. The silane coupling agent and the montmorillonite are subjected to an intercalation modification reaction, so that the interlamellar spacing of the montmorillonite is opened, intercalation of macromolecular chains is facilitated, meanwhile, the compatibility of the water dispersible montmorillonite andan organic phase is better, the stability of emulsion is facilitated, and meanwhile, the water resistance and alkali resistance of the material are enhanced.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a water-based polyurethane resin and a preparation method thereof. Background technique [0002] Water-based polyurethane uses water instead of organic solvents as the dispersion medium. In addition to the excellent performance of solvent-based polyurethane, water-based polyurethane has the advantages of non-toxicity, environmental friendliness, etc., and has good weather resistance and grease resistance. With the improvement of people's requirements for environmental protection, there is an increasing demand for water-based resins to replace solvent-based resins to prepare synthetic leather. The new ecological standard solution of the European Community has a new definition of the scope of use of toxic and harmful solvents. At the same time, my country's environmental protection department has limited the content of toluene and DMF in the sewage discharge of the leather industry...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/36C08G18/34C08G18/32C08G18/42C08G18/22C08K9/06C08K3/34C08J3/03
CPCC08G18/227C08G18/4018C08G18/4277C08G18/4812C08G18/4825C08G18/4829C08G18/4854C08G18/6607C08G18/6611C08G18/6625C08G18/6629C08G18/6674C08G18/6677C08G18/6692C08G18/6696C08J3/03C08K3/346C08K9/06
Inventor 刘娅林宁继鑫徐旭东陈玉国陈建栋张留生郭翠娟高云峰郑萍赵继光
Owner SHANDONG TIANQING TECH DEV