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Preparation method of high-water-resistance water-based polyurethane adhesive for purification equipment

A technology for polyurethane adhesives and purification equipment, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problems of poor chemical resistance and water resistance, and have not yet met people's needs, so as to prevent alcohol The solution and synthesis operation are simple and easy, and the reaction time is short

Inactive Publication Date: 2021-01-29
苏州言信新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of its film, such as solvent resistance, chemical resistance, and poor water resistance, the simplest polyurethane emulsion has not yet met people's needs in some properties. Maintain its proper mechanical properties to make it more in line with people's needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a water-based polyurethane adhesive for high water-resistant purification equipment, comprising the following steps:

[0026] (1) Put tung oil in a constant temperature oil bath at 80°C, and under magnetic stirring, drip excess epoxide at a constant speed to react for 2 hours;

[0027] (2) The product is washed with 5% sodium carbonate solution, washed with saturated brine, then washed with deionized water until neutral, and evaporated to remove water to obtain epoxy tung oil;

[0028] (3) Get epoxy tung oil, add monohydric alcohol, magnetically stir and mix evenly, then add tetrafluoroboric acid, stir and react at room temperature for 15s, obtain tung oil polyol oligomer, wherein, epoxy tung oil, monohydric alcohol and tetrafluoroboric acid The volume ratio is 10:20:3;

[0029] (4) adding anhydrous magnesium sulfate to remove the water produced by the reaction, to obtain tung oil polyol;

[0030] (5) Mix polyethylene glycol 2000 and tung oil p...

Embodiment 2

[0039] A preparation method of a water-based polyurethane adhesive for high water-resistant purification equipment, comprising the following steps:

[0040] (1) Put tung oil into an 80°C constant-temperature oil bath, and under magnetic stirring, drip excess epoxide at a constant speed to react for 3.5 hours;

[0041] (2) The product is washed with 5% sodium carbonate solution, washed with saturated brine, then washed with deionized water until neutral, and evaporated to remove water to obtain epoxy tung oil;

[0042] (3) Get epoxy tung oil, add monohydric alcohol, magnetically stir and mix evenly, then add tetrafluoroboric acid, stir and react at room temperature for 20s, obtain tung oil polyol oligomer, wherein, epoxy tung oil, monohydric alcohol and tetrafluoroboric acid The volume ratio is 10:23:4;

[0043] (4) adding anhydrous magnesium sulfate to remove the water produced by the reaction, to obtain tung oil polyol;

[0044] (5) Mix polyethylene glycol 2000 and tung oil...

Embodiment 3

[0053] A preparation method of a water-based polyurethane adhesive for high water-resistant purification equipment, comprising the following steps:

[0054] (1) Put tung oil in a constant temperature oil bath at 80°C, and under magnetic stirring, drop excess epoxy oxidant at a constant speed to react for 5 hours;

[0055] (2) The product is washed with 5% sodium carbonate solution, washed with saturated brine, then washed with deionized water until neutral, and evaporated to remove water to obtain epoxy tung oil;

[0056] (3) Get epoxy tung oil, add monohydric alcohol, magnetically stir and mix evenly, then add tetrafluoroboric acid, stir and react at room temperature for 25s, obtain tung oil polyol oligomer, wherein, epoxy tung oil, monohydric alcohol and tetrafluoroboric acid The volume ratio is 10:25:5;

[0057] (4) adding anhydrous magnesium sulfate to remove the water produced by the reaction, to obtain tung oil polyol;

[0058] (5) Mix polyethylene glycol 2000 and tung...

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Abstract

The invention provides a preparation method of a high-water-resistance water-based polyurethane adhesive for purification equipment. The preparation method comprises the following steps: preparing tung oil polyol; mixing polyethylene glycol 2000 and tung oil polyol according to the total mass, heating and stirring, and carrying out vacuum dehydration; after dehydration is finished, cooling, addingisophorone diisocyanate and dimethylolpropionic acid, and carrying out heating reaction; cooling to 50 DEG C, adding diethylene glycol, and heating for reaction; cooling, adding stannous octoate anddibutyltin dilaurate, and heating to 60 DEG C for reaction; after the reaction is finished, cooling, pouring a prepolymer into an emulsifying barrel, adding triethylamine, neutralizing and stirring; slowly adding water for emulsification under high-speed shearing of a stirrer to obtain the high-water-resistance water-based polyurethane adhesive for the purification equipment. The high-water-resistance water-based polyurethane adhesive for the purification equipment has the advantages that the film forming property is good, the physical and mechanical properties of an adhesive film are good, and the water resistance is good.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a preparation method of a water-based polyurethane adhesive for high water-resistant purification equipment. Background technique [0002] Water-based polyurethane adhesives use water as a solvent and adopt self-emulsification technology to prepare dispersions. Compared with traditional polyurethane adhesives, organic solvents are reduced or not used in the synthesis of resins. This reduces the cost of raw materials on the one hand, and reduces volatility on the other hand. The discharge of organic pollutants improves the living environment and reduces the risk of chemical accidents. Therefore, water-based polyurethane adhesives are widely used in a wide range of applications. They are used as adhesive layers in automobiles, pharmaceutical industries, and precision mechanical equipment. While satisfying excellent adhesion, they also endow materials with good mechanical properties and...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04C08G18/75C08G18/66C08G18/48C08G18/36C08G18/34C08G18/32
CPCC08G18/3206C08G18/348C08G18/36C08G18/4833C08G18/6692C08G18/755C08G2170/80C09J11/04C09J175/14C08K3/38
Inventor 李玉光
Owner 苏州言信新型材料有限公司