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Method for preparing epoxy acrylate modified waterborne polyurethane coating

An epoxy acrylate, water-based polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as low shrinkage rate, and achieve the effects of low shrinkage rate, good physical properties and cold resistance, and low cost

Inactive Publication Date: 2012-07-18
常熟市协新冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that there is no polyurethane water-based coating with relatively complete comprehensive performance in the prior art, and in view of the fact that pure water-based polyurethane is difficult to meet people's needs in terms of performance, epoxy Resin has the advantages of excellent bonding ability, high modulus, high strength, excellent adhesion, low shrinkage, good water resistance and chemical resistance, and acrylate has good water resistance, physical properties and weather resistance and low cost. , the two resins are introduced into the water-based polyurethane segment through graft copolymerization, and the water-based polyurethane is modified to make it green and environmentally friendly and the performance of all aspects can be significantly improved. It is of positive significance.

Method used

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  • Method for preparing epoxy acrylate modified waterborne polyurethane coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A). Synthesis of modified epoxy acrylate

[0025] Add 6 parts of epoxy resin E-51, 0.2 parts of polypropylene glycol (PPG600) and 0.002 parts of catalyst dibutyltin dilaurate to the four-necked flask by weight, slowly heat to 80°C, and add 0.01 parts of polymerization inhibition after 15 minutes of reaction Add 0.02 parts of p-methoxyphenol as an agent, add dropwise a mixed solution of 1 part of acrylic acid, 2 parts of butyl acrylate and 0.002 parts of dibutyltin dilaurate as a catalyst, drop it in about 0.5 hours, and slowly raise the temperature to 75°C, every 1 hour Take a sample to measure the acid value once, when the acid value is less than 5mgKOH / g, lower the temperature to obtain low viscosity modified epoxy acrylate;

[0026] B). Preparation of epoxy acrylate modified water-based polyurethane emulsion

[0027] Add 4 parts of methyl-2,4-diisocyanate weighed by weight into a four-necked flask equipped with a stirrer, a thermometer, a condenser tube and ...

Embodiment 2

[0031] A). Synthesis of modified epoxy acrylate

[0032] Add 8 parts by weight of epoxy resin E-51, 0.2 parts of polypropylene glycol (PPG1000) and 0.002 parts of catalyst dibutyltin dilaurate into the four-necked flask, slowly heat to 80 ° C, and add 0.01 parts of polymerization inhibition after 15 minutes of reaction Add 0.02 parts of p-methoxyphenol as an agent, add dropwise a mixed solution of 1 part of acrylic acid, 2 parts of methyl methacrylate and 0.002 parts of dibutyltin dilaurate as a catalyst, finish adding dropwise in about 0.5 hours, and slowly raise the temperature to 86 ° C, every Sampling and measuring the acid value every 1 hour, when the acid value is less than 5mgKOH / g, lower the temperature to obtain low-viscosity modified epoxy acrylate;

[0033] B). Preparation of epoxy acrylate modified water-based polyurethane emulsion

[0034] Add 4 parts of methyl-2,4-diisocyanate by weight to a four-neck flask equipped with a stirrer, thermometer, condenser...

Embodiment 3

[0038] A). Synthesis of modified epoxy acrylate

[0039] Add 7 parts by weight of epoxy resin E-44, 0.3 parts of polypropylene glycol (PPG2000) and 0.003 parts of catalyst dibutyltin dilaurate into a four-neck flask, slowly heat to 80 ° C, and add 0.01 parts of polymerization inhibition after 15 minutes of reaction Add 0.03 parts of p-methoxyphenol as an agent, add dropwise a mixed solution of 2 parts of acrylic acid and 0.003 parts of dibutyltin dilaurate as a catalyst, finish adding dropwise for 0.5 hours, slowly raise the temperature to 88°C, and measure the acid value once every 1 hour. When the acid value is less than 5mgKOH / g, lower the temperature to obtain low-viscosity modified epoxy acrylate;

[0040] B). Preparation of epoxy acrylate modified water-based polyurethane emulsion

[0041] TM Add 6 parts by weight of methyl-2,4-diisocyanate to a four-necked flask equipped with a stirrer, a thermometer, a condenser tube and a nitrogen conduit, and add the modifyi...

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Abstract

The invention discloses a method for preparing epoxy acrylate modified waterborne polyurethane coating and belongs to the technical field of chemical coatings. The method comprises the following steps: A) synthetizing modified epoxy acrylate; B) preparing an epoxy acrylate modified waterborne polyurethane emulsion; and C) preparing the finished product epoxy acrylate modified waterborne polyurethane coating. The epoxy acrylate modified waterborne polyurethane coating has the advantages of excellent bondability of epoxy resin, high modulus, high strength, high adhesive force, low shrink rate, water resistance and chemistry resistance. The epoxy acrylate modified waterborne polyurethane coating has excellent water resistance, physical property and weather resistance of acrylate ester; the raw materials are easy to obtain and have low cost; and the epoxy acrylate modified waterborne polyurethane coating has good physical performance and cold resistance of waterborne polyurethane and has environment protection property.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, and in particular relates to a method for preparing epoxy acrylate modified waterborne polyurethane coatings. Background technique [0002] Water-based polyurethane has good physical properties and excellent cold resistance, and is a green and environmentally friendly material with rapid development. However, a single polyurethane emulsion has poor self-thickening properties, low solid content, and latex film has poor water resistance and low mechanical strength. Low gloss and high cost. A kind of two-component polyurethane coating disclosed as Chinese Patent Publication No. CN101457120A and production method, construction method; Publication No. CN1179745A discloses an acrylic latex coating for rubber products; epoxy resin has the advantages of excellent bonding ability, high modulus, high strength, excellent adhesion, low shrinkage, water resistance and chemical resistance. It is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C08G18/67C08G59/17C08G59/16
Inventor 沈国俭
Owner 常熟市协新冶金材料有限公司
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