Amino-silicone oil modified waterborne polyurethane and preparation method thereof

A water-based polyurethane, amino silicone oil technology, applied in the direction of repelling fibers to liquids, textiles and papermaking, fiber processing, etc., can solve the problems of limited cross-linking density, poor water resistance, solvent resistance, and the influence of the service life of fabrics, etc. Achieve the effect of low surface tension, great application value and good softness

Inactive Publication Date: 2020-11-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane (WPU) has excellent elasticity and film-forming properties, does not contain formaldehyde, and has good environmental performance. However, WPU is generally obtained t

Method used

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  • Amino-silicone oil modified waterborne polyurethane and preparation method thereof
  • Amino-silicone oil modified waterborne polyurethane and preparation method thereof
  • Amino-silicone oil modified waterborne polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of amino silicone oil modified water-based polyurethane, its chemical reaction process, such as figure 1 shown, including the following steps:

[0045] (1) 12.5g PCL-1000 or PPG-1000, 4.88g HDI or IPDI, 0.02g DBTDL were added to a three-necked flask and mixed, and the reaction was carried out at a low speed at 90°C for 2h to obtain a prepolymer;

[0046] Take the prepolymer to measure the content of -NCO group in the reactant, it should reach the theoretical value;

[0047] (2) Add 0.9g DMPA to the prepared prepolymer, react for 1h, and carry out chain extension; after the chain extension is completed, add 0.6g ASO to carry out graft modification, and continue to react at 90 °C for 2h, chain extension and Silicon is introduced, and the viscosity of the system is adjusted with NMP throughout the process;

[0048] (3) stop heating the mixed solution after chain extension modification, take out and cool down for 30min, then add 0.6g of TEA to...

Embodiment 2

[0053] A preparation method of aminosilicone oil-modified water-based polyurethane, comprising the following steps:

[0054] (1) 13.5g PCL-1000 or PPG-1000, 4.90g HDI or IPDI, 0.02g DBTDL were added to a three-necked flask and mixed, and the prepolymer was prepared by stirring at a low speed for 2 hours at 90°C;

[0055] Take the prepolymer to measure the content of -NCO group in the reactant, it should reach the theoretical value;

[0056] (2) Add 1.0g DMPA to the prepared prepolymer, react for 1h, and carry out chain extension; after the chain extension is completed, add 0.9g ASO to carry out graft modification, and continue the reaction at 90 °C for 2h, chain extension and Silicon is introduced, and the viscosity of the system is adjusted with NMP throughout the process;

[0057] (3) stop heating the mixed solution after chain extension modification, take out and cool down for 30min, and then add 0.7g of TEA to it for 40min to obtain a neutralized salt solution mixed syste...

Embodiment 3

[0062] A preparation method of aminosilicone oil-modified water-based polyurethane, comprising the following steps:

[0063] (2) 14.7g PCL-1000 or PPG-1000, 5.0g HDI or IPDI, 0.04g DBTDL, were added to a three-necked flask and mixed, and the prepolymer was prepared by stirring at a low speed for 2 hours at 90°C;

[0064] Take the prepolymer to measure the content of -NCO group in the reactant, it should reach the theoretical value;

[0065] (2) Add 1.1g DMPA to the prepared prepolymer, react for 1h, and carry out chain extension; after the chain extension is completed, add 1.46g ASO to carry out graft modification, and continue to react at 90°C for 2h to extend chain And introduce silicon element, and adjust the viscosity of the system with NMP in the whole process;

[0066] (3) stop heating the mixed solution after chain extension modification, take out and cool down for 30min, then add 0.8g of TEA to it and react for 40min to obtain a neutralized salt solution mixed system;...

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Abstract

The invention discloses amino-silicone oil modified waterborne polyurethane and a preparation method thereof. The amino-silicone oil modified waterborne polyurethane comprises the following raw materials in parts by weight: 12.5-14.7 parts of polyester polyol, 4.88-5.0 parts of polyisocyanate, 0.02-0.04 part of a catalyst, 0.9-1.1 parts of a hydrophilic chain extender, 0.6-1.5 parts of a modifier,9.0-11.0 parts of a solvent, 0.6-0.8 part of a neutralizer, 0.02-0.04 part of a post-chain extender and 42.0-48.0 parts of deionized water. The amino-silicone oil modified waterborne polyurethane hasmaximum water absorption rate of 7.8%, maximum tensile strength of 30.28 MPa, and minimum elongation at break of 458.93%. The preparation method comprises the following steps: subjecting polyester polyol to reacting with polyisocyanate under the action of the catalyst to obtain a prepolymer; introducing the chain extender on the basis of the prepolymer, subjecting the prepolymer to reacting withthe modifier, and introducing alkoxy-terminated amino silicone oil into the prepolymer; and finally, adding the deionized water for high-speed emulsification to prepare the modified amino-silicon oilmodified waterborne polyurethane with good emulsion stability and latex film water resistance. The method is simple in process step, easy to operate and good in repeatability.

Description

technical field [0001] The invention relates to the field of preparation of water-based polyurethane, in particular to an amino-silicone oil-modified water-based polyurethane and a preparation method thereof. Background technique [0002] At present, the finishing agent of textiles generally adopts urea-formaldehyde resin, 2D resin, cyanaldehyde resin, low-formaldehyde resin, etc. Not only are these finishes not environmentally friendly, they also contain formaldehyde. Water-based polyurethane (WPU) has excellent elasticity and film-forming properties, and does not contain formaldehyde, and has good environmental protection performance. However, WPU is generally prepared by linear polymerization, and its cross-linking density is limited, resulting in poor water and solvent resistance. After the fabric is used, it has a greater impact on the service life of the fabric. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide an amino-silicone o...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/42C08G18/48C08G18/10C08G18/61C08G18/34C08G18/32D06M15/568D06M15/572D06M15/564
CPCC08G18/10C08G18/4277C08G18/4825C08G18/73C08G18/755D06M15/564D06M15/568D06M15/572D06M2200/12C08G18/348C08G18/61C08G18/3228
Inventor 来水利杨欣陈功葛茹月刘筱
Owner SHAANXI UNIV OF SCI & TECH
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