A kind of salt-spray resistant waterborne polyester primer and preparation method thereof
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A technology of water-based polyester and water-based polyester resin, which is applied in the field of coatings and can solve problems such as human health damage, environmental pollution, and waste of resources
Active Publication Date: 2017-05-31
SHANGHAI YISAI NEW MATERIAL TECH CO LTD
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[0003] Environmental pollution will also cause harm to human health. At the same time, these VOCs volatilized into the air are also a serious waste of resources.
Method used
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preparation example Construction
[0051] Another aspect of the present invention provides the preparation method of salt spray resistant waterborne polyester primer, comprising the following steps:
[0052] (1) Under the condition of stirring, according to the weight of the raw material components, first mix the water-based polyester resin, water and amine neutralizer evenly, and then add the defoamer and Leveling agent, stir for 30min;
[0053] (2) Adjust the rotation speed to 600~700r / min, add permethyletherified amino resin in step (1), stir for 20 minutes, then add filler and continue stirring for 30 minutes to obtain the product.
Embodiment 1
[0058] A kind of salt-spray resistant waterborne polyester primer, described primer is prepared by comprising following raw materials by weight:
[0059] Water-based polyester resin 100
[0060] Hardener 22
[0061] Defoamer 0.2
[0062] Leveling agent 0.3
[0063] Filler 0.6
[0064] water 32
[0065] The water-based polyester resin is prepared through the following steps: (1) Add 1.25mol linoleic acid and 1.25mol glycerin to a 500ml four-neck flask equipped with a stirrer, thermometer, water separation condensing device and nitrogen protection device , and then add 0.7% hypophosphorous acid color reducer accounting for the total weight of the feed, and rapidly heat up to 230 ° C, and esterify for 1.5 hours, then take a sample to detect the acid value, when the acid value in the reaction system is ≤ 5, put The temperature of the reaction system dropped below 120°C.
[0066] (2) Add 1.20 mol of maleic anhydride and 1.32 mol of deionized water into a 500ml four-neck flask...
Embodiment 2
[0071] A kind of salt-spray resistant waterborne polyester primer, described primer is prepared by comprising following raw materials by weight:
[0072] Water-based polyester resin 100
[0073] Hardener 28
[0074] Defoamer 0.2
[0075] Leveling agent 0.3
[0076] Filler 0.6
[0077] water 32
[0078] The preparation method for water-based polyester resin and salt spray-resistant water-based polyester primer is the same as in Example 1.
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Abstract
The invention discloses salt-fog-resistant waterborne polyester primer and a preparation method thereof. The primer is prepared from, by weight, 100 parts of waterborne polyester resin, 22-35 parts of curing agents, 0.1-0.3 part of defoaming agents, 0.2-0.5 part of flattening agent, 0.5-2.0 parts of filler and 32-45 parts of water. The provided primer is environment-friendly, resistance to corrosion and capable of improving adhesion and the like, and can be used for appearance coating of automobiles, agricultural motor vehicles and other vehicles.
Description
technical field [0001] The invention relates to the technical field of coatings, more specifically, the invention relates to a salt spray-resistant water-based polyester primer and a preparation method thereof. Background technique [0002] In recent years, as the technical requirements for the coating of agricultural machinery vehicles and small and micro cars have become higher and higher, the amount of polyester resin coatings in the industry has also increased year by year due to its superior performance. At present, the polyester resins used in domestic and foreign automotive coatings and agricultural machinery coatings are mainly solvent-based resins. A large amount of volatile organic compounds (VOC) in these systems will not only affect [0003] Environmental pollution will also cause harm to human health. At the same time, these VOCs volatilized into the air are also a serious waste of resources. Today, when the whole people advocate low-carbon environmental protec...
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