Preparation method of salt-fog-resistant polyaspartic acid ester, salt-fog-resistant polyaspartic acid ester and coating
An aspartate and salt spray-resistant technology, applied in the preparation of salt spray-resistant polyaspartate, salt spray-resistant polyaspartate and coatings, can solve the problem of poor hydrophobicity and water resistance , Poor salt spray resistance and poor salt spray resistance of coatings, to achieve the effect of improving water resistance and salt spray resistance, long construction period, excellent water resistance and salt spray resistance
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Embodiment 1
[0043] Take a 1L four-necked flask, add 514g (1mol) of F530 polyaspartate, 30.2g (0.1mol) of NX-2024 cardanol resin, 0.3g (0.001mol) of tetraisopropyl titanate, then stir and heat up to 100°C, under the relative vacuum of -0.095MPa, under reduced pressure distillation reaction for 2 hours to obtain salt spray-resistant polyaspartate;
[0044]The obtained salt spray-resistant polyaspartate had a secondary amine group equivalent of 263.5 and a viscosity of 1800 mPa·s (25° C.).
Embodiment 2
[0046] Take a 1L four-necked flask, add F520 polyaspartate 582g (1mol), LITE-2020 cardanol resin 68.8g (0.2mol), dibutyltin oxide 0.74g (0.003mol), then stir and heat up to 120 ℃, under the relative vacuum degree of -0.095MPa, the vacuum distillation reaction is carried out for 3 hours to obtain the salt spray-resistant polyaspartic acid ester;
[0047] The secondary amine group equivalent of the obtained salt spray-resistant polyaspartate was 321, and the viscosity was 3350 mPa·s (25° C.).
Embodiment 3
[0049] Take a 1L four-necked flask, add F530 polyaspartate 514g (1mol), NX-2024 cardanol resin 75.5g (0.25mol), tetraisopropyl titanate 0.58g (0.002mol), then stir and heat up to 100°C, under the relative vacuum of -0.095MPa, under reduced pressure distillation reaction for 5 hours to obtain salt spray-resistant polyaspartate;
[0050] The secondary amine group equivalent of the obtained salt spray-resistant polyaspartate was 309, and the viscosity was 3200 mPa·s (25° C.).
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