Fireproof and flame-retardant type sand surface waterborne polyurethane finishing coat and a preparation method thereof
A water-based polyurethane, fire-resistant and flame-retardant technology, applied in polyurea/polyurethane coatings, fire-resistant coatings, coatings, etc., can solve the problems of operator injury, increased risk of fire and explosion, pollution of the environment, etc., and achieve enhanced weather resistance , High fullness of the coating, the effect of increasing the hardness
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[0076] A kind of preparation method of above-mentioned fire retardant type sand surface waterborne polyurethane finish paint, comprises the following steps:
[0077] S1, preparation of component A
[0078] S1.1. Add water, water-based acrylic dispersion hydroxyl resin, halogen-free flame-retardant water-based polyurethane resin, defoamer, dispersant and wetting agent in the dispersion tank according to mass percentage, and carry out medium-speed dispersion, medium-speed dispersion The speed is 600~800r / min;
[0079] S1.2. Slowly add nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminum hydroxide, calcined kaolin, sand flour and water-based wax powder, add water to rinse the cylinder wall, and disperse at high speed for 20-50 minutes until the fineness is ≤40 microns. Add leveling agent, thickener, preservative and antifungal agent at medium and low dispersing speed. The speed is 1000-1500r / min, and the fineness and viscosity of the finished product are teste...
Embodiment 1
[0086] A kind of fire-proof and flame-retardant sand surface water-based polyurethane topcoat comprises the following components by mass percentage:
[0087] A component (main paint)
[0088]
[0089] B component (curing agent)
[0090] Hydrophilic aliphatic polyisocyanate 40.0%
[0091] Lipophilic aliphatic polyisocyanate 36.0%
[0092] Propylene Glycol Diacetate 24.0%
[0093] Component A (main paint) and component B (curing agent) are mixed according to the NCO / OH equivalent ratio of n(-NCO):n(-OH)=1.2~1.3, that is, the -NCO functional group in component A and The equivalent molar ratio of -OH functional groups in component B is 1.2-1.3.
[0094] A kind of preparation method of above-mentioned fire retardant type sand surface waterborne polyurethane finish paint, comprises the following steps:
[0095] S1, preparation of component A
[0096] S1.1. Add water, water-based acrylic dispersion hydroxyl resin, halogen-free flame-retardant water-based polyurethane resin, ...
Embodiment 2
[0105] A kind of fire-proof and flame-retardant sand surface water-based polyurethane topcoat comprises the following components by mass percentage:
[0106] A component (main paint)
[0107]
[0108] B component (curing agent)
[0109] Hydrophilic aliphatic polyisocyanate 42.0%
[0110] Lipophilic aliphatic polyisocyanate 35.0%
[0111] Propylene Glycol Diacetate 23.0%
[0112] Component A (main paint) and component B (curing agent) are mixed according to the NCO / OH equivalent ratio of n(-NCO):n(-OH)=1.2~1.3, that is, the -NCO functional group in component A and The equivalent molar ratio of -OH functional groups in component B is 1.2-1.3.
[0113] A kind of preparation method of above-mentioned fire retardant type sand surface waterborne polyurethane finish paint, comprises the following steps:
[0114] S1, preparation of component A
[0115] S1.1. Add water, water-based acrylic dispersion hydroxyl resin, halogen-free flame-retardant water-based polyurethane resin, ...
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Abstract
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