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Preparation of high-adhesivity clean waterborne polyurethane adhesive

A technology of water-based polyurethane and cleaning glue, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of low bonding strength, low solid content, poor weather resistance, etc., and achieve low cost, The effect of high solid content and high bond strength

Inactive Publication Date: 2019-04-09
江苏瑞丰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of low bonding strength, poor weather resistance and low solid content of water-based polyurethane adhesives in the prior art, and to provide a preparation method for high-bonding water-based polyurethane cleaning adhesives, which can prepare clean High-performance water-based polyurethane adhesive products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of a high-bond water-based polyurethane cleaning adhesive for shoes:

[0023] (1) Add 200 g of polybutylene adipate and 35 g of polypropylene glycol into a four-neck flask, dehydrate in vacuum at 120°C for 2 hours; cool down to 75°C, and add 70 g of methylene diisocyanate while blowing nitrogen gas , 40 g of isophorone diisocyanate, 15 g of trimethylolpropane, 4 g of dibutyltin dilaurate, and 80 mL of anhydrous acetone solution; The response can be considered adequate;

[0024] (2) When the temperature rises to 80°C, add 28 g of butanediol and continue the reaction until the concentration of NCO groups reaches the second theoretical value; add 45 mL of anhydrous acetone to the above mixture for dilution, and then divide it into 4 equal parts; cool down to 50°C Finally, 7, 15, 23, and 31 g of sodium ethylenediaminoethanesulfonate chain extender were added to each equal portion, and each reaction was carried out for 30 min. Then mix again to obtain the mixed...

Embodiment 2

[0029] Preparation of a high-bond water-based polyurethane cleaning adhesive for wood processing:

[0030] (1) Add 140 g of polybutylene adipate and 23 g of polypropylene glycol into a four-neck flask, dehydrate in vacuum at 120°C for 2 hours; cool down to 75°C, and add 60 g of methylene diisocyanate while blowing nitrogen gas , 30 g of isophorone diisocyanate, 11 g of trimethylolpropane, 2.5 g of dibutyltin dilaurate, and 105 mL of anhydrous acetone solution. After the dropwise addition, keep warm for 2 h, and the concentration of NCO groups reaches the first theoretical The response can be considered adequate;

[0031] (2) When the temperature rises to 80°C, add 21 g of 1,4-butanediol and continue the reaction until the concentration of NCO groups reaches the second theoretical value; add 58 mL of anhydrous acetone to the above mixture to dilute, and then divide it into 4 equal parts; cool down After reaching 50°C, add 4, 6, 8, and 10 g of sodium ethylenediaminoethanesulfon...

Embodiment 3

[0036] Preparation of a high-bonding water-based polyurethane cleaning adhesive for vehicles:

[0037] (1) Add 170 g of polybutylene adipate and 38 g of polypropylene glycol into a four-neck flask, vacuum dehydrate at 120°C for 2 hours; cool down to 75°C, and add 80 g of methylene diisocyanate while blowing nitrogen gas , 40 g of isophorone diisocyanate, 18 g of trimethylolpropane, 2 g of dibutyltin dilaurate, and 125 mL of anhydrous acetone solution. After the dropwise addition, keep warm for 2 h, and the concentration of NCO groups reaches the first theoretical The response can be considered adequate;

[0038] (2) When the temperature rises to 80°C, add 16 g of 1,4-butanediol and continue the reaction until the concentration of NCO groups reaches the second theoretical value; add 50 mL of anhydrous acetone to the above mixture to dilute, then divide into 4 equal parts; cool down After reaching 50°C, 9, 13, 17, and 21 g of sodium ethylenediaminoethanesulfonate chain extender...

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Abstract

The invention discloses preparation of high-adhesivity clean waterborne polyurethane adhesive, belonging to the technical field of waterborne adhesives. According to the preparation, the technical problems in the prior art that a waterborne polyurethane adhesive is poor in adhesivity and weather resistance and low in solid content are solved. The waterborne polyurethane adhesive provided by the invention contains the following components in parts by weight: 150-260 parts of polybutylene adipate, 20-55 parts of polypropylene glycol, 45-110 parts of hexamethylene diisocyanate, 35-80 parts of isophorone diisocyanate, 10-20 parts of trimethylolpropane, 3-9 parts of dibutyltin dilaurate, 56-73 parts of a sulfonic acid ion chain extender, 21-43 parts of a micromolecule chain extender, 10-20 parts of triethylamine, 30-50 parts of ethanediamine, 45-130 parts of acrylate, 2-6 parts of sodium persulfate and 90-185 parts of ahydrous acetone. The high-adhesivity clean waterborne polyurethane adhesive is high in adhesive strength, good in weather resistance, high in solid content, short in room-temperature curing time and low in cost, and a preparation process is simple and easy and convenientin operation, and the preparation process is pollution-free. The primary adhesive strength of the adhesive reaches up to 51N / cm, and the peel strength of the adhesive reaches 166N / (2.5cm).

Description

technical field [0001] The invention specifically relates to the preparation of a high-bonding water-based polyurethane cleaning adhesive, which belongs to the technical field of water-based adhesives. Background technique [0002] Polyurethane adhesives are adhesives containing urethane groups and isocyanate groups. Due to its high elasticity, low temperature resistance, wear resistance and high adhesion strength, polyurethane is widely used in adhesives, coatings, inks and other fields. Polyurethane adhesives can be divided into solvent-free liquid adhesives, hot-melt adhesives, solvent-based adhesives, water-based adhesives, etc. according to whether they contain solvents. Among the adhesive series products, solvent-based products occupy a large proportion. However, solvent-based adhesives emit volatile organic compounds, which are very harmful to the environment and human body. Water-based is the development trend. Water-based polyurethane uses water as a solvent, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/75C08G18/73C08G18/72C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12C08F283/00C08F220/14C08F220/18
CPCC08F283/006C08G18/12C08G18/3206C08G18/4018C08G18/4238C08G18/4825C08G18/722C08G18/73C08G18/755C09J175/06C08G18/3857C08G18/3228C08F220/14
Inventor 杜峰
Owner 江苏瑞丰科技实业有限公司
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