Novel acrylate modified waterborne polyurethane adhesive

A water-based polyurethane and acrylate technology, applied in polyurea/polyurethane adhesives, graft polymer adhesives, adhesives, etc., can solve the problems of poor water resistance, low initial adhesion, and low bond strength, and achieve The market prospect is broad, the effect of improving the bonding performance and shortening the curing time

Inactive Publication Date: 2019-01-25
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic water-based polyurethane adhesives have disadvantages such as slow drying speed, low initia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] 1. Add 26 grams of isophorone diisocyanate (IPDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG, 2000) into a 500ml three-necked flask equipped with stirring blade, condenser and nitrogen protection at 80℃ Add 0.02 g of dibutyl tin dilaurate as an initiator, and keep it at 70-80°C for 40-50 minutes.

[0031] 2. Add 7 grams of 2,2-dimethylolpropionic acid and react for 2 hours. During the reaction, use acetone to adjust the viscosity.

[0032] 3. Cool down so that the temperature in the three-necked flask is 40~48℃, and add triethylamine and a small amount of deionized water to neutralize it.

[0033] 4. After the dispersion is uniform, add 7 grams of sodium lauryl sulfate and 5 grams of potassium persulfate and continue to react for 30 minutes.

[0034] 5. After 30 minutes, add 20 grams of butyl acrylate and adjust the temperature to 60°C, and react for 2 hours.

[0035] 6. After 2 hours, a new acrylate modified waterborne polyurethane adhes...

Example Embodiment

[0036] Example 2

[0037] 1. Add 26.3 grams of toluene diisocyanate (TDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG, 2000) into a 500ml three-necked flask equipped with a stirring blade, condenser and nitrogen protection, and add 0.02 grams of two Dibutyltin laurate is used as an initiator and stirred at 90°C for 40-50 minutes.

[0038] 2. Add 5 grams of 2,2-dimethylolpropionic acid and react for 1 hour. During the reaction, use acetone to adjust the viscosity.

[0039] 3. Cool down to 50℃, add 7g sodium lauryl sulfate, 5g azobisisobutyronitrile and 30g hydroxyethyl acrylate, raise the temperature to 80℃, and react for two hours

[0040] 4. Cool down to 40°C, add triethylamine and a small amount of deionized water to neutralize and disperse to obtain a new type of acrylate modified waterborne polyurethane adhesive.

Example Embodiment

[0041] Example 3

[0042] 1. Put 43 grams of isophorone diisocyanate (IPDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG, 1000) into a 500ml three-necked flask equipped with stirring blade, condenser and nitrogen protection at 80℃ Add 0.02 g of dibutyl tin dilaurate as an initiator, and keep it at 70-80°C for 40-50 minutes.

[0043] 2. Add 7 grams of 2,2-dimethylolpropionic acid and react for 2 hours. During the reaction, use acetone to adjust the viscosity.

[0044] 3. Cool down so that the temperature in the three-necked flask is 40~48℃.

[0045] 4. Add 10 grams of 2-hydroxyethyl methacrylate and continue the reaction for 30 minutes.

[0046] 5. After 30 minutes, add 7 grams of sodium lauryl sulfate, 5 grams of azobisisobutyronitrile and 30 grams of hydroxybutyl acrylate and adjust the temperature to 60°C, and react for 2 hours.

[0047] 6. After 2 hours, cool down to 40°C and add triethylamine and a small amount of deionized water to neutralize. After being unifo...

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PUM

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Abstract

The invention provides a novel acrylate modified waterborne polyurethane adhesive. The adhesive is characterized by being prepared by the following steps: taking polyether glycol and polyisocyanate toreact, so as to obtain a waterborne polyurethane pre-polymer; enabling the waterborne polyurethane pre-polymer to react with an acrylic monomer or a methacrylic acid monomer under the action of an emulsifier and an initiator to obtain waterborne polyurethane acrylate, so as to obtain emulsion, wherein the emulsion is the acrylate modified waterborne polyurethane adhesive. The invention further discloses a preparation method and application of the adhesive. Compared with the prior art, the novel acrylate modified waterborne polyurethane adhesive has the advantages of better environment-friendly performance and improved anti-oxidization capability and anti-ageing capability; the adhesive has good bonding performance with adhesive films and paper products.

Description

technical field [0001] The present invention relates to a binder, and also relates to a preparation method of the binder. Background technique [0002] Water-based polyurethane adhesive uses water as the dispersion medium. It has the advantages of environmental protection, non-toxicity, long service life and resource saving. It is widely used in the bonding of construction, automobiles, home decoration, packaging, printing, leather, handicrafts, etc. Water-based polyurethane binders have achieved great development abroad, among which Bayer, BASF and other companies have developed a series of water-based polyurethane binders. It starts relatively late in China and is in the development stage. The present invention has broad prospects. At present, domestic water-based polyurethane adhesives have disadvantages such as slow drying speed, low initial adhesion and poor water resistance, especially the low bonding strength seriously affects its wide application. Contents of the ...

Claims

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Application Information

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IPC IPC(8): C09J151/08C09J175/14C08F283/00C08F220/14C08F220/18C08G18/48C08G18/34C08G18/66C08G18/67C08G18/32
CPCC08F283/008C08G18/3206C08G18/348C08G18/36C08G18/4854C08G18/6674C08G18/6692C08G18/672C09J151/08C09J175/14C08F220/14C08F220/18C08F220/1804
Inventor 周超江龙赵赫
Owner CHANGCHUN UNIV OF TECH
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