A kind of quick-drying type waterborne epoxy ester emulsion and its preparation method and application
An epoxy ester, fast-drying technology, used in coatings, anti-corrosion coatings, etc., can solve the problem of film forming, water resistance and anti-rust performance of paint film, poor water resistance and anti-rust performance of paint film, reaction The process is not easy to control and other problems, to achieve the effects of good self-crosslinking, dense paint film, good hydrolysis resistance and storage stability
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Embodiment 1
[0051] This example aims to demonstrate the preparation method of quick-drying waterborne epoxy ester emulsion, and the preparation steps are as follows:
[0052] (1) Add 140g of E-12 epoxy resin, 65g of linoleum, and 75g of soybean oil into a four-necked flask, gradually increase the temperature 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 38g soy acid;
[0053] (2) Cool down to 150°C, mix 20g methyl methacrylate, 35g styrene, 25g methacrylic acid and 3g tert-butyl peroxybenzoate, and then gradually add them dropwise to a four-necked flask. The dropping time is controlled within 4 to 8 hours, after the dripping is completed, keep it for 3 to 4 hours until the conversion rate is 98±2%;
[0054] (3) Raise the temperature to 190°C and start to measure the acid value after 2 to 3 hours of reaction. After the acid value is 40mgKOH / g, start to cool;
[0055] (4) Cool down t...
Embodiment 2
[0059] This example aims to demonstrate the preparation method of quick-drying waterborne epoxy ester emulsion, and the preparation steps are as follows:
[0060] (1) Add 140g of E-12 epoxy resin, 56g of tung oil, and 80g of tall oleic acid into a four-necked flask, gradually increase the temperature to 130°C, start stirring after the material melts, continue to increase the temperature to 180°C, and react at this temperature to After the acid value is less than 5mgKOH / g, add 42g tall oil acid;
[0061] (2) Cool down to 150°C, mix 20g isobutyl methacrylate, 35g vinyl toluene, 25g methacrylic acid and 3g tert-butyl peroxybenzoate, and then gradually add them dropwise to a four-necked flask. Add time Control it for 4 to 8 hours, after the dripping is completed, keep it for 3 to 4 hours until the conversion rate is 98±2%;
[0062] (3) Raise the temperature to 190°C and start to measure the acid value after 2 to 3 hours of reaction. After the acid value is 40mgKOH / g, start to cool;
[00...
Embodiment 3
[0069] This example aims to demonstrate a method for preparing anti-rust primer using quick-drying waterborne epoxy ester emulsion as a base material, and the preparation steps are as follows:
[0070] (1) Add 450g quick-drying water-based epoxy ester emulsion, 170g deionized water, 4g N,N-dimethylethanolamine, 4g defoamer BYK-024 and 3g wetting and dispersing agent BYK-190 into the high-speed dispersing kettle , Stir for 15-30 minutes at a speed of 600-800rpm to make the materials evenly mixed;
[0071] (2) Add 68g iron oxide red, 150g zinc phosphate, 84g precipitated barium sulfate and 56g talc CMS-888, and 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 for 1 to 1.5 hours at a speed of 600-800rpm to make the materials evenly mixed;
[0073] (4) Detect the pH value, add an appropriate amount of neutralizer, and adjust the pH value to 7.5~8.5;
[0074] (5) Filter with a 80-120 mesh...
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