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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 initial adhesion and poor water resistance, especially the low bonding strength seriously affects its wide application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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-neck flask equipped with a stirring blade, a condenser tube and nitrogen protection at 80°C 0.02 g of dibutyltin dilaurate was added as an initiator, and kept at 70-80° C. for 40-50 minutes.

[0031] 2. Add 7 grams of 2,2-dimethylolpropionic acid and react for 2 hours. Acetone can be used to adjust the viscosity during the reaction.

[0032] 3. Lower the temperature so that the temperature in the three-neck flask is 40-48°C, and neutralize by adding triethylamine and a small amount of deionized water.

[0033] 4. After the dispersion is uniform, add 7 grams of sodium lauryl sulfate and 5 grams of potassium persulfate to continue the reaction 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] After 6.2 hours, obtain novel acrylate modi...

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 paddle, condenser and nitrogen protection, and add 0.02 grams of Dibutyltin laurate was 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. Acetone can be used to adjust the viscosity during the reaction.

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

[0040] 4. Cool down to 40°C, add triethylamine and a small amount of deionized water for neutralization and dispersion, and obtain a new type of acrylate-modified water-based polyurethane binder.

example 3

[0042] 1. Add 43 grams of isophorone diisocyanate (IPDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG, 1000) into a 500ml three-neck flask equipped with a stirring blade, a condenser tube and nitrogen protection at 80°C 0.02 g of dibutyltin dilaurate was added as an initiator, and kept at 70-80° C. for 40-50 minutes.

[0043] 2. Add 7 grams of 2,2-dimethylolpropionic acid and react for 2 hours. Acetone can be used to adjust the viscosity during the reaction.

[0044] 3. Lower the temperature so that the temperature in the three-neck flask is 40-48°C.

[0045] 4. Add 10 g 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 for 2 hours of reaction.

[0047] 6. After 2 hours, lower the temperature to 40°C and add triethylamine and a small amount of deionized water ...

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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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