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UV-curable water-based epoxy acrylic resin coating and preparation method thereof
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A technology of epoxy acrylic and acrylic resin, which is applied in the direction of coating, etc., and can solve the problems of VOC increase and other issues
Inactive Publication Date: 2018-03-23
DONGLAI COATING TECH SHANGHAI
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Problems solved by technology
However, general UV-curable acrylic coatings are solvent-based, requiring a large amount of reactive diluent monomers, which will lead to a significant increase in VOC in the coating, which is in violation of the increasingly stringent international VOC control regulations in coatings
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Embodiment 1
[0036] (1) Synthetic epoxy acrylic resin:
[0037] In a three-necked flask equipped with a stirrer, condenser, constant pressuredropping funnel, and thermometer, add a certain amount of epoxy resin 42kg and polymerization inhibitor 0.8kg, mix the epoxy resin and polymerization inhibitor, slowly stir and heat to 70-90°C, then add dropwise a mixture of 42kg of acrylic resin and 0.15kg of catalyst, drop it in 0.5-1h, then raise the temperature to 75-85°C, and measure the acid value of the system after reaching the set value (pH=2-4) , the reaction ends to obtain epoxy acrylic resin;
[0038] (2) epoxy acrylic resin modification
[0039] Add catalyst 1.35kg in the epoxy acrylic resin gained in step (1), fully stir, drop into the maleic anhydride (maleic anhydride) of 12kg, then slowly stir and heat up to reaction temperature 75-85 ℃, every Sampling and measuring the acid value of the system once every 5 minutes, stop the reaction when the acid value is close to the theoretical ...
Embodiment 2
[0053] A kind of ultraviolet curing water-based epoxy acrylic resin coating, comprises the component of following parts by weight:
[0054] Epoxy resin selects bisphenol A epoxy resin 40 for use;
[0062] The above-mentioned UV-curable waterborne epoxy acrylic resin coating is prepared by the following method:
[0063] (1) Mix epoxy resin and polymerization inhibitor, stir slowly and heat to 70-90°C, then add dropwise the mixed solution of acrylic resin and catalyst (the amount is 1wt% of the total amount of catalyst), and drop it in 0.5-1h , and then the temperature was raised to 75-85° C., after the acid value of the measuring system reached pH=2-4, the reactio...
Embodiment 3
[0067] A kind of ultraviolet curing water-based epoxy acrylic resin coating, comprises the component of following parts by weight:
[0068] Epoxy resin selects bisphenol A epoxy resin 45 for use;
[0076] The above-mentioned UV-curable waterborne epoxy acrylic resin coating is prepared by the following method:
[0077] (1) Mix epoxy resin and polymerization inhibitor, stir slowly and heat to 70-90°C, then add dropwise the mixed solution of acrylic resin and catalyst (the amount is 3wt% of the total amount of catalyst), and drop it in 0.5-1h , and then warming up to 75-85°C, after the acid value of the measuring system reaches pH=2-4, the reaction ends, and epoxy ...
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Abstract
The invention relates to a UV-curable water-based epoxyacrylic resincoating and a preparation method thereof. The method comprises the following steps: (1) mixing epoxy resin and a polymerization inhibitor, performing heating to the temperature of 70-90 DEG C under slow stirring, then adding a mixed liquid of acrylic resin and a catalyst dropwise for 0.5-1h, raising the temperature to be 75-85 DEG C, measuring the acid value of the system, and when the pH value achieves 2-4, finishing a reaction to obtain epoxyacrylic resin; (2) adding a catalyst into the epoxy acrylic resin obtained in thestep (1), performing stirring fully and uniformly, adding maleic anhydride, and performing heating to the reaction temperature of 75-85 DEG C under slow stirring to obtain modified epoxy acrylic resin; and (3) under stirring with a moderate speed at a room temperature, slowly adding a neutralizing agent, water and a water-based photoinitiator into the modified epoxy acrylateoligomer for a salt forming reaction, and performing neutralization until the pH is 7-8 to obtain the UV-curable water-based epoxy acrylic resin coating product. Compared with the prior art, the coating provided by the invention has the advantages that the coating film has excellent water resistance, alkali resistance and acid resistance.
Description
technical field [0001] The invention relates to a coating, in particular to an ultravioletlight curing water-based epoxy acrylic resin coating and a preparation method thereof. Background technique [0002] UV-curable resin coatings have grown rapidly in recent years due to their excellent properties such as fast curing speed, energy saving, and high coating gloss. In particular, epoxy acrylic resins are most commonly used due to their high reactivity. However, general UV-curable acrylic coatings are solvent-based and require a large amount of reactive diluent monomers, which will lead to a substantial increase in VOC in coatings, which is in violation of the increasingly stringent international VOC control regulations in coatings. At present, in order to ensure the sustainable development of the national economy, the country has formulated strict environmental protection policies and increased law enforcement; people's awareness of environmental protection is increasing, ...
Claims
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Application Information
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