Single-component room-temperature multiple-self-crosslinking aqueous epoxy acrylate resin emulsion and preparation method thereof

A technology of epoxy acrylic and resin emulsion, which is applied in the field of coatings, can solve the problems that water-based coatings cannot meet the application requirements, etc., achieve excellent gloss and outdoor aging resistance, improve corrosion resistance and wear resistance, and improve crosslinking effect of density

Active Publication Date: 2013-09-25
天达科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the room temperature self-crosslinking coatings currently developed use a single crosslinking method. As people have higher and higher requirements for the coating film performance of coatings, the performance of single crosslinking water-based coatings often cannot meet the application requirements, while multiple crosslinking Lianeng can effectively increase the crosslinking density of the paint film, thereby improving the water resistance, abrasion resistance, corrosion resistance and mechanical strength of the paint film, which represents the development trend of self-crosslinking technology for water-based anti-corrosion coatings in the future

Method used

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  • Single-component room-temperature multiple-self-crosslinking aqueous epoxy acrylate resin emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of one-component room temperature multiple self-crosslinking waterborne epoxy acrylic resin emulsion comprises the following steps:

[0027] a. After adding 30g E-12 type epoxy resin and 20g E-20 type epoxy resin into the reaction kettle protected by nitrogen gas, heat up to 100°C and keep it warm for 0.5h to make the E-12 type epoxy resin in solid state completely After melting, start stirring, then add a mixture of 38g of linoleic acid and 15g of oleic acid, and add 0.5g of catalyst monobutyltin oxide, heat up to 140°C and keep it warm for 3 hours, at this time, the mass concentration of unsaturated fatty acids in the system decreases The acid value of the system is 2.8mgKOH / g, which is the end point of the reaction, and then the room temperature self-crosslinking epoxy ester resin modified by unsaturated fatty acid is obtained.

[0028]b. Add 60g of n-butanol to the above-mentioned reaction kettle equipped with 40g of self-crosslinking epoxy es...

Embodiment 2

[0032] The preparation method of one-component room temperature multiple self-crosslinking waterborne epoxy acrylic resin emulsion comprises the following steps:

[0033] a. Add 40g of E-12 epoxy resin to the reaction kettle protected by nitrogen gas, raise the temperature to 110°C, keep it warm for 0.5h to completely melt the E-12 epoxy resin in solid state, start stirring, and then add A mixture of 30g of dehydrated ricinoleic acid and 20g of oleic acid, and adding 2g of catalyst triphenylphosphine, heating up to 150°C and then keeping it warm for 3h. At this time, the mass concentration of unsaturated fatty acids in the system dropped to 70%, and then the temperature was raised to 200°C After holding the reaction at ℃ for 5 hours, the acid value of the system is 3.1 mgKOH / g, which is the end point of the reaction, and a room temperature self-crosslinking epoxy ester resin modified by unsaturated fatty acid is obtained.

[0034] b. In the reaction kettle equipped with 55g ro...

Embodiment 3

[0038] The preparation method of one-component room temperature multiple self-crosslinking waterborne epoxy acrylic resin emulsion comprises the following steps:

[0039] a. After adding 30g E-12 type epoxy resin and 10gE-20 type epoxy resin into the reaction kettle with nitrogen protection, raise the temperature to 100°C and keep it warm for 0.5h to make the E-12 type epoxy resin in solid state completely After melting, start stirring, then add 37g of linolenic acid, and add 1g of catalyst tetrabutylammonium bromide, heat up to 160°C and keep it warm for 2 hours, at this time, the mass concentration of unsaturated fatty acids in the system drops to 65%, and then After raising the temperature to 210°C and keeping it warm for 6 hours, the acid value of the system was 2.8 mgKOH / g, which was the end point of the reaction, and a room temperature self-crosslinking epoxy ester resin modified by unsaturated fatty acid was obtained.

[0040] b. In the reaction kettle equipped with the...

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Abstract

The invention discloses a single-component room-temperature multiple-self-crosslinking aqueous epoxy acrylate resin emulsion and a preparation method thereof. The method comprises the steps of: firstly, in parts by mass, preparing 40-50 parts of bisphenol A type epoxy resin and 50-60 parts of unsaturated fatty acid, introducing nitrogen gas to protect under the action of a catalyst, and carrying out esterification reaction so as to synthesize unsaturated fatty acid-modified epoxy ester resin; then, adding a cosolvent to room-temperature self-crosslinking epoxy ester resin, dropwise adding an initiator, monomers with hydrophilic groups, self-crosslinking functional monomers and a chain transfer agent to the room-temperature self-crosslinking epoxy ester resin in 1-3 h at the temperature of 100-110 DEG C, and then, carrying out free radical grafting and copolymerizing reaction so as to obtain single-component room-temperature multiple-self-crosslinking aqueous epoxy acrylate resin; and adding an amine neutralizer to neutralize, and then, adding deionized water to disperse, thereby obtaining a single-component dual-self-crosslinking aqueous epoxy acrylate resin emulsion. The emulsion has the advantages of fast paint film drying, strong adhesive power, high mechanical strength and excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a main body resin mainly used for anti-corrosion coatings for iron and steel products, especially suitable for single-group protective and coating coatings for traffic vehicles, construction machinery, and steel furniture manufacturing industries. One part room temperature self-crosslinking waterborne anti-corrosion coating. technical background [0002] As one of the three general-purpose thermosetting resins, epoxy resin has excellent adhesion, stability, wear resistance, corrosion resistance, insulation and mechanical strength, and is widely used in the coatings industry. However, traditional epoxy resins use a large amount of organic solvents in the application, which increases the cost on the one hand, and on the other hand, the shortcomings of organic solvents such as flammability, explosion, toxicity, and environmental pollution have brought a lot of inconveni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/00C08F283/10C08G59/16C08J3/24C09D151/00C09D5/08
Inventor 任碧野彭军
Owner 天达科技股份有限公司
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