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A kind of aqueous polyurethane and preparation method thereof

A water-based polyurethane, high-performance technology, applied in the field of polymer materials, can solve the problems of complicated preparation methods, no involvement, and reduction of effective chain extension.

Active Publication Date: 2021-08-27
优美特(北京)环境材料科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water resistance, alcohol resistance, heat resistance and hardness of the high-performance waterborne polyurethane dispersion are improved, but it does not involve the improvement of its flexibility, adhesion and other mechanical properties
[0004] Chinese patent CN 1226323C discloses a method for preparing high-performance water-based polyurethane. By strictly controlling the NCO content after the prepolymer is dispersed into water, the isocyanate functional group and A large amount of water reacts to reduce the problem of effective chain extension
However, its operation method is relatively cumbersome, which is not conducive to the widespread promotion of technical products.
[0005] Chinese patent CN 100475874C discloses a method for preparing a high-efficiency oxidative self-crosslinking high-performance aqueous polyurethane dispersion. In the chain structure design of polyurethane, an alkyd resin is introduced as an oxidative crosslinking unit, but it does not involve the mechanical properties, resistance Improvement of comprehensive performance such as thermal performance
However, the number of active groups in its amino-type cage silsesquioxane is large, and the process control is cumbersome, which is not conducive to industrial production.
[0008] The existing modified high-performance water-based polyurethane still has problems such as poor mechanical properties, poor water resistance, and cumbersome and complicated preparation methods.

Method used

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  • A kind of aqueous polyurethane and preparation method thereof
  • A kind of aqueous polyurethane and preparation method thereof
  • A kind of aqueous polyurethane and preparation method thereof

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preparation example Construction

[0060] The present invention also provides the preparation method of high-performance waterborne polyurethane, it comprises the following steps:

[0061] a) Add solvent to the reactor, add functionalized POSS, hydrophilic chain extender, control the temperature at 30-70°C, stir to dissolve (preferably last 0.5-2.0 hours), and then add isocyanate dropwise (preferably slowly dropwise) In the reactor, react for 0.5-2.0 hours;

[0062] b) Add polyol, small molecule chain extender, and catalyst into the reactor, control the temperature at 60-100°C, and react for 1.5-5.0 hours;

[0063] c) continue to add the remaining solvent to the mixture obtained in step b), then add a metered multifunctional compound, control the temperature at 50-80° C., and react for 1.5-4.0 hours to obtain a high-performance water-based polyurethane prepolymer;

[0064] d) Control the temperature of the high-performance water-based polyurethane prepolymer obtained in step c) at 30-70°C, and add a salt-formi...

Embodiment 1

[0087] In a dry reactor equipped with a stirrer and a temperature measuring instrument, add 5 g of acetone (AC), 5 g of N,N-dimethylformamide (DMF), 2 g of isobutyl-substituted aminoethylaminopropyl-POSS (purchased from Hybrid Plastics, AM0275, Mw=917.65), 6g dimethylolpropionic acid (DMPA), controlled temperature at 50°C, stirring and dissolving for 0.5 hour, to a clear and transparent state, then 45g toluene diisocyanate (TDI) Slowly added dropwise to the reactor, the dropping time was controlled at 1 hour, and then reacted for 0.5 hour; 25g polybutylene adipate diol (Mw=1000, hydroxyl value 110mgKOH / g), 1g 1,6 -Add hexanediol (HDO) and 0.05g dibutyltin dilaurate into the reactor, stir and react at 70°C for 3 hours; add 5g N,N-dimethylformamide (DMF) to adjust the viscosity to 400mPa·s , and then add 0.5g of trimethylolpropane (TMP), and stir and react at 60°C for 2 hours to obtain a high-performance water-based polyurethane prepolymer. Gained high-performance water-based p...

Embodiment 2

[0089]In the drying reactor equipped with stirrer and temperature measuring instrument, add 12.5g butanone, 4g phenyl-substituted hydroxyethyl hydroxypropyl-POSS (purchased from Hangzhou Yajian Biotechnology Co., Ltd., P007, Mw=1127.53 ), 8g dimethylol butyric acid (DMBA), controlled temperature at 60°C, stirring and dissolving for 1 hour until clear and transparent, then 35g isophorone diisocyanate (IPDI), 5g hexamethylene diisocyanate ( After HDI) is mixed evenly, it is slowly added dropwise to the reactor, and the drop time is controlled at 2 hours, followed by 1 hour reaction; 40g polypropylene oxide glycol (Mw=2000, hydroxyl value 55mgKOH / g), 2g Add pentanediol (NPG) and 0.05g stannous octoate into the reactor, and stir and react at 80°C for 2.5 hours; add 5g N,N-dimethylformamide (DMF) to adjust the viscosity to 350mPa·s, then add 1g of pentaerythritol was stirred and reacted at 80°C for 2 hours to obtain a high-performance water-based polyurethane prepolymer. Gained hi...

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Abstract

The invention relates to a water-based polyurethane, which is a high-performance water-based polyurethane chemically modified by functionalized polyhedral oligomeric silsesquioxane and a multifunctional compound, has a network structure, and exhibits improved mechanical properties and heat resistance, Lower water absorption rate and good solvent resistance; the present invention also relates to a preparation method of high-performance water-based polyurethane, which is prepared by introducing functionalized polyhedral oligomeric silsesquioxane for chemical side chain grafting, and through multifunctional The compound forms a network structure, the process is simple and the process is easy to control.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-performance water-based polyurethane chemically modified with functionalized polyhedral oligomeric silsesquioxane and a multifunctional compound and a preparation method thereof. Background technique [0002] High-performance water-based polyurethane has been known for a long time. It uses water as the dispersion medium and has the advantages of non-toxic, non-flammable, non-polluting, energy-saving, safe and reliable. In addition, the unique molecular structure of polyurethane makes it have excellent soft and hard adjustable characteristics, which can be used in a wide range of coating and finishing fields. [0003] Chinese patent CN 101265318B discloses a method for preparing a high-performance water-based polyurethane dispersion, which is prepared by using 2-80% ring-structured polymer polyol as the main raw material and polyisocyanate. The water resistance, alcohol re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/61C08G18/48C08G18/44C08G18/67C08G18/42C08G18/34C08G18/12C08G18/32
CPCC08G18/12C08G18/3206C08G18/348C08G18/4009C08G18/4238C08G18/44C08G18/4825C08G18/61C08G18/664C08G18/6659C08G18/6674C08G18/6692
Inventor 张建森郝伟郭金砚
Owner 优美特(北京)环境材料科技股份公司
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