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Rapid dry type water-based epoxy ester emulsion and preparation method and application thereof

An epoxy ester, quick-drying technology, applied in coatings, anti-corrosion coatings, etc. The process is not easy to control and other problems, to achieve the effect of good self-crosslinking, dense paint film, good hydrolysis resistance and storage stability

Active Publication Date: 2015-04-01
上海华谊涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of preparation method also has the following disadvantages: (1) the reaction process is not easy to control, and gelation is prone to occur; (2) in the synthesis process, due to the incomplete reaction of the acrylate monomer, it remains in the emulsion system, which has a large odor and toxicity Heavy; (3) The acid value of the resin is high, and the water resistance and rust resistance of the paint film are poor
Since the emulsion is prepared by phase inversion emulsification, there are disadvantages such as high requirements for emulsification equipment, coarse latex particle size, and poor storage stability. At the same time, due to the use of a large amount of surfactant, the film-forming properties of the paint , Water resistance and anti-rust performance deteriorate

Method used

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  • Rapid dry type water-based epoxy ester emulsion and preparation method and application thereof
  • Rapid dry type water-based epoxy ester emulsion and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment aims to demonstrate the preparation method of quick-drying water-based epoxy ester emulsion, and its preparation steps are as follows:

[0052] (1) Add 140g of E-12 epoxy resin, 65g of linoleic acid, and 75g of soybean oil into a four-necked flask, and gradually heat up to 130°C. After the material melts, start stirring, continue to heat up to 180°C, and react at this temperature to After the acid value is less than 5mgKOH / g, add 38g soy oil;

[0053] (2) Cool down to 150°C, mix 20g of methyl methacrylate, 35g of styrene, 25g of methacrylic acid and 3g of tert-butyl peroxybenzoate evenly, and then drop them into a four-necked flask gradually, and the dropping time is controlled at 4 to 8 hours, after the dropwise addition, keep warm for 3 to 4 hours until the conversion rate is 98±2%;

[0054] (3) Raise the temperature to 190°C, and after reacting for 2 to 3 hours, start to measure the acid value, and after the acid value is 40mgKOH / g, start to cool dow...

Embodiment 2

[0059] This embodiment aims to demonstrate the preparation method of quick-drying water-based epoxy ester emulsion, and its preparation steps are as follows:

[0060] (1) Add 140g E-12 epoxy resin, 56g tung oil, and 80g tall oleic acid into a four-necked flask, gradually heat up to 130°C, start stirring after the material melts, continue to heat up to 180°C, and react at this temperature to After the acid value is less than 5mgKOH / g, add 42g tall oleic acid;

[0061] (2) Cool down to 150°C, mix 20g of isobutyl methacrylate, 35g of vinyl toluene, 25g of methacrylic acid and 3g of tert-butyl peroxybenzoate evenly, and gradually add them dropwise into a four-necked flask. Control it within 4 to 8 hours, after the dropwise addition, keep it warm for 3 to 4 hours until the conversion rate is 98±2%;

[0062] (3) Raise the temperature to 190°C, and after reacting for 2 to 3 hours, start to measure the acid value, and after the acid value is 40mgKOH / g, start to cool down;

[0063] (...

Embodiment 3

[0069] This embodiment is intended to demonstrate the method for preparing antirust primer with quick-drying water-based epoxy ester emulsion as base material, and its preparation steps are as follows:

[0070] (1) Add 450g of quick-drying water-based epoxy ester emulsion, 170g of deionized water, 4g of N,N-dimethylethanolamine, 4g of defoamer BYK-024 and 3g of wetting and dispersing agent BYK-190 into the high-speed dispersion kettle , Stir at a speed of 600-800rpm for 15-30 minutes to mix the materials evenly;

[0071] (2) Add 68g iron oxide red, 150g zinc phosphate, 84g precipitated barium sulfate and 56g talcum powder CMS-888, grind with a sand mill until the fineness is less than 30 microns;

[0072] (3) Add 4g of water-based drier HLD-061 and 7g of thickener WT-202, and stir at a speed of 600-800rpm for 1-1.5 hours to mix the materials evenly;

[0073] (4) Detect the pH value, add an appropriate amount of neutralizer, and adjust the pH value to 7.5-8.5;

[0074] (5) Fi...

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Abstract

The invention relates to rapid dry type water-based epoxy ester emulsion and a preparation method and application thereof. The rapid dry type water-based epoxy ester emulsion comprises the following raw materials in percentage by weight: 10-30 percent of epoxy resin, 10-30 percent of unsaturated fatty acids, 2-15 percent of vegetable oil, 4-20 percent of (methyl) acrylate or vinyl monomer, 2-8 percent of methacrylic acid, 0.1-0.5 percent of an initiator, 2-5 percent of a cosolvent, 1-3 percent of a neutralizer and 45-55 percent of deionized water. The technical scheme in the invention comprises preparation of the rapid dry type water-based epoxy ester emulsion, and preparation of rapid dry type water-based epoxy ester anti-corrosive primer with excellent anti-rust performance by using the emulsion serving as a base material together with non-toxic and high-efficiency anti-rust pigments. The epoxy ester emulsion disclosed by the invention has the characteristics of high drying speed, excellent water resistance and anti-rust property, high storage stability, safety, environment friendliness, simple preparation process and the like.

Description

technical field [0001] The invention relates to a quick-drying water-based epoxy ester emulsion and its preparation method and application. The quick-drying water-based epoxy ester emulsion can be used to prepare a quick-drying water-based epoxy ester antirust paint. Background technique [0002] With the enhancement of people's awareness of environmental protection, the use of solvent-based coatings is increasingly restricted due to serious environmental pollution and health problems. Environmentally friendly water-based coatings are the current development trend of the coatings industry. [0003] Epoxy ester antirust coatings are widely used in the field of metal antirust due to their excellent antirust performance. Epoxy ester resin is made by esterification reaction of epoxy resin and vegetable oil fatty acid. Therefore, epoxy ester has many excellent properties of epoxy resin and drying oil at the same time. Compared with alkyd resin, epoxy ester resin has higher hydr...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08G59/14C08G59/16C09D151/08C09D7/12C09D5/08
Inventor 刘卫峰赵其中孙凌廖群晖
Owner 上海华谊涂料有限公司
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