Acrylate emulsion, preparation method and water-based aluminum powder coating containing acrylate emulsion
A technology of acrylate and ethyl acrylate, applied in the direction of coating, etc., can solve problems such as the decrease of thickening performance and thixotropic performance, and achieve the effect of good orientation energy, less addition amount and good stability
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[0040] The present invention also includes a kind of preparation method of acrylate emulsion, comprising:
[0041] S101. The nonionic surfactant accounting for 0-100% of the total mass of nonionic surfactant and the anionic surfactant accounting for 0-100% of the total mass of anionic surfactant are placed in the reaction flask as a compound emulsifier, and then added Deionized water accounting for 30%-100% of the total mass of deionized water is stirred and heated to 80°C-90°C;
[0042] S102. Add methacrylic acid, ethyl acrylate, polyurea crosslinking monomer, initiator, nonionic surfactant accounting for 0-100% of the total mass of nonionic surfactant, accounting for 0-100% of the total mass of anionic surfactant % anions and deionized water accounting for 0-70% of the total mass of deionized water are pre-emulsified to obtain a stable pre-emulsion, which is added dropwise to the reaction bottle within 2-3 hours, and then kept for 2 hours to obtain.
Embodiment 1
[0044] Preparation of Polyurea Crosslinking Monomer
[0045] 1) Add 58.06g (0.5mol) of β-hydroxyethyl acrylate to the reaction flask, and then cool down the reaction system. When the temperature of the system drops to 10°C-20°C, start to drop 116.55g (0.525mol) For phodione diisocyanate (IPDI), the dripping time is controlled to be 1 hour, and the temperature is kept for 2 hours after the dripping is completed.
[0046] 2) After the heat preservation is over, lower the temperature of the system. After controlling the temperature of the system to stabilize at 5°C-10°C, add 106.5g (0.5mol) of n-tetradecylamine into the reaction flask, and then control the temperature of the reaction system. Note The reaction temperature should not exceed 10°C, keep warm for 2 hours, and the monomer containing urea bond and urethane bond can be obtained after discharging.
Embodiment 2
[0048] Prepare the acrylate emulsion DX-1 for aluminum powder orientation according to the distribution ratio of each component in the following table 1
[0049] Table 1, DX-1 group distribution ratio
[0050]
[0051] S101. Put the nonionic surfactant and the anionic surfactant in the reaction flask as a composite emulsifier, then add deionized water accounting for 30% of the total mass of deionized water and stir to raise the temperature to 85° C.;
[0052] S102. Perform a pre-emulsification operation on methacrylic acid, ethyl acrylate, polyurea crosslinking monomer, initiator and remaining deionized water to obtain a stable pre-emulsion, drop it into the reaction bottle within 3 hours, and keep it warm for 2 hours. Acrylate emulsion DX-1 was obtained.
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