Waterborne polyurethane coating and preparation method thereof

A technology of water-based polyurethane and water-based polyurethane adhesive, which is applied in the direction of polyurea/polyurethane coatings and coatings, can solve the problems of poor heat resistance and unstable dispersion of water-based polyurethane coatings, and achieve good heat resistance, easy storage and transportation. The effect of simple synthesis process

Inactive Publication Date: 2015-03-25
SHANDONG YONGTAI CHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, current water-based polyurethane coatings have shortcomings such as unstable dispersion and poor heat resistance. The present invention aims at the defi

Method used

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  • Waterborne polyurethane coating and preparation method thereof
  • Waterborne polyurethane coating and preparation method thereof
  • Waterborne polyurethane coating and preparation method thereof

Examples

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Comparison scheme
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Example Embodiment

[0033] Example 1

[0034] The invention provides a waterborne polyurethane coating and a preparation method thereof, which consist of the following components by weight:

[0035]

[0036] The preparation process of the waterborne polyurethane coating of the present invention is as follows:

[0037] (1) In a four-necked flask equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, the molar ratio of isophorone diisocyanate (IPDI): ethylene glycol: xylene = 4:3:0.5 mol For comparison, add phorone diisocyanate (IPDI), ethylene glycol, and xylene into a four-necked flask, and continuously introduce argon gas, and react for 4h at room temperature;

[0038] (2) Slowly add 0.1ml of dibutyltin dilaurate, slowly increase the temperature to 60°C, react for 2h, and remove excess solvent by rotary evaporation to obtain an aqueous polyurethane latex;

[0039] (3) Add the above-mentioned ingredients except the silicon coupling agent into the mixer and mix them evenly. Befo...

Example Embodiment

[0040] Example 2

[0041] The invention provides a waterborne polyurethane coating and a preparation method thereof, which consist of the following components by weight:

[0042]

[0043] The preparation process of the waterborne polyurethane coating of the present invention is as follows:

[0044] (1) In a four-necked flask equipped with a stirrer, thermometer, dropping funnel, and reflux condenser, the molar ratio of isophorone diisocyanate (IPDI): ethylene glycol: xylene = 4.5:3.5:0.6 moles For comparison, add phorone diisocyanate (IPDI), ethylene glycol, and xylene into a four-necked flask, and continuously pass in argon, and react for 4.5 hours at room temperature;

[0045] (2) Slowly add 0.1-0.5ml dibutyltin dilaurate, slowly increase the temperature to 65°C, react for 3h, and remove the excess solvent by rotary evaporation to obtain an aqueous polyurethane latex;

[0046] (3) Add the above-mentioned ingredients except the silicon coupling agent into the mixer and mix them evenly...

Example Embodiment

[0047] Example 3

[0048] The invention provides a waterborne polyurethane coating and a preparation method thereof, which consist of the following components by weight:

[0049]

[0050] The preparation process of the waterborne polyurethane coating of the present invention is as follows:

[0051] (1) In a four-necked flask equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, the molar ratio of isophorone diisocyanate (IPDI): ethylene glycol: xylene = 4.8:3.5:0.9 moles For comparison, add phorone diisocyanate (IPDI), ethylene glycol, and xylene into a four-necked flask, and continuously pass in argon gas, and react for 5 hours at room temperature;

[0052] (2) Slowly add 0.4ml of dibutyltin dilaurate, slowly increase the temperature to 75°C, react for 3h, and remove excess solvent by rotary evaporation to obtain an aqueous polyurethane latex;

[0053] (3) Add the above-mentioned ingredients except the silicon coupling agent into the mixer and mix them eve...

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Abstract

The invention provides a waterborne polyurethane coating and a preparation method thereof, and belongs to the field of the polyurethane coatings. A waterborne polyurethane latex is adopted as a dominant ingredient, and in combination with the synergistic effect of other ingredients, the waterborne polyurethane coating is dispersed evenly, good in heat resistance, good in stability, and convenient to store and transport; the synthesis process of the waterborne polyurethane coating is simple, simple and convenient to operate, and convenient for construction; and the waterborne polyurethane coating has a relatively high use value.

Description

technical field [0001] The invention belongs to a preparation method of paint, in particular to a water-based polyurethane paint and a preparation method thereof. Background technique [0002] Corrosion will cause huge losses, and the protection of metal corrosion is mainly achieved through anti-corrosion coatings. At present, solvent-based anti-corrosion coatings are mostly used in metal anti-corrosion, such as TY3318 and TY3319 whose main components are phenolic modified epoxy resins. Since different resins have their own unique properties, different resins can be dissolved according to different use environments during construction. In organic solvents, such as polyurethane has excellent weather resistance and chemical resistance, high gloss, abrasion resistance, silicone resin has excellent heat resistance and can be used as a base material for heat-resistant and weather-resistant coatings, etc., while solvent-based coatings The proportion of solvents can be controlled ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C08G18/75C08G18/32
CPCC09D175/04C08G18/3206C08G18/755C09D7/63C08L71/02C08K5/053C08K5/13C08K5/5435
Inventor 尤晓明王显涛李洋迟文泉邓世海
Owner SHANDONG YONGTAI CHEM GROUP
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