Castor oil modified emulsion for improving edge corrosion resistance of waterborne coating
A technology of water-based paint and castor oil, applied in anti-corrosion paint, coating, etc., can solve problems such as low grafting rate and unstable emulsion, achieve good compatibility, improve salt spray resistance, and increase reactivity
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Embodiment 1
[0029] A. Castor oil modified monomer formula:
[0030]
[0031] After vacuum dehydration of castor oil, add castor oil, acetone, and organotin catalyst into a four-necked flask according to the formula, raise the temperature to 75°C, add isocyanate ethyl acrylate dissolved in p-hydroxyanisole dropwise, and add dropwise for 1.5 hours After the completion of the heat preservation at 75° C. for 1 hour, the NCO content was tested. After the NCO value was <1, the acetone was vacuum removed to obtain 132 parts of castor oil modified monomers.
[0032] B. Castor oil modified emulsion formula:
[0033] (1) Compound emulsifier formula:
[0034] 1 part nonionic emulsifier
[0035] Reactive emulsifier 3 parts
[0036] Prepare compound emulsifiers according to formula.
[0037] (2) Nuclear monomer pre-emulsion formula:
[0038]
[0039] Put vinyl monomers or vinyl aromatic compounds that do not contain carboxyl or hydroxyl groups, deionized water, composite emulsifiers and ini...
Embodiment 2
[0046] A. Castor oil modified monomer formula:
[0047]
[0048] After vacuum dehydration of castor oil, add castor oil, acetone, and organotin catalyst into a four-necked flask according to the formula, raise the temperature to 75°C, add isocyanate ethyl acrylate dissolved in p-hydroxyanisole dropwise, and add dropwise for 1.5 hours After the completion of the heat preservation at 75° C. for 1 hour, the NCO content was tested. After the NCO value was less than 1, the acetone was vacuum removed to obtain 120 parts of castor oil modified monomers.
[0049] B. Castor oil modified emulsion formula:
[0050] (1) Compound emulsifier formula:
[0051] 1 part nonionic emulsifier
[0052] Reactive emulsifier 3 parts
[0053] Prepare compound emulsifiers according to formula.
[0054] (2) Nuclear monomer pre-emulsion formula:
[0055]
[0056] Put vinyl monomers or vinyl aromatic compounds that do not contain carboxyl or hydroxyl groups, deionized water, composite emulsifier...
Embodiment 3
[0062] A. Castor oil modified monomer formula:
[0063]
[0064] After vacuum dehydration of castor oil, add castor oil, acetone, and organotin catalyst into a four-necked flask according to the formula, raise the temperature to 75°C, add isocyanate ethyl acrylate dissolved in p-hydroxyanisole dropwise, and add dropwise for 1.5 hours After the completion of the heat preservation at 75° C. for 1 hour, the NCO content was tested. After the NCO value was <1, the acetone was vacuum removed to obtain 132 parts of castor oil modified monomers.
[0065] B. Castor oil modified emulsion formula:
[0066] (1) Compound emulsifier formula:
[0067] 1 part nonionic emulsifier
[0068] Reactive emulsifier 3 parts
[0069] Prepare compound emulsifiers according to formula.
[0070] (2) Nuclear monomer pre-emulsion formula:
[0071]
[0072] Put vinyl monomers or vinyl aromatic compounds that do not contain carboxyl or hydroxyl groups, deionized water, composite emulsifiers and ini...
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