waterborne coating composition
A technology of composition and coating, applied in the direction of coating, etc.
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Embodiment 1
[0068] Embodiment 1: synthetic acrylic copolymer
[0069] 5 kg of deionized water was introduced into the reaction vessel and heated to 85°C. An initiator solution was prepared by dissolving 35 g of ammonium peroxodisulfate in 4 kg of water. By adding 800 g of 35% strength poly(oxy-1,2-ethylenediyl), α-sulfo-ω-[l-[(nonylphenoxy)methanol, mixed in equimolar ratio with its ammonium salt base]-2-(2-propen-1-yloxy)ethoxy]- (CAS ref. 113405-85-9), and 120 g of 50% strength eikosa (oxy-1,2- ethylenediyl), α-sulfo-ω-[l-[(allyloxy-3-alkoxy-propylene-2-yl]-aqueous solution to 3kg water, prepare surfactant solution, wherein alkane The base is a mixture derived from a fatty alcohol mixture with 13-20 carbon atoms in the alkyl group.By 3.5kg hydroxyethyl methacrylate, 1.77kg methyl methacrylate, 850g styrene, 380g methacrylic acid, and 3.5kg n-butyl acrylate prepares monomer mixture.This monomer mixture is emulsified in the aqueous solution of surfactant of 80% quality, and all the oth...
Embodiment 2
[0071] Example 2 Aqueous clear coating composition 1
[0072] From 8.5 kg of the acrylic copolymer dispersion of Example 1, 20 g of flow and leveling additives (acid number 80 mg / g, hydroxyl number 58 mg / g, and molar mass of 25 kg / mol acid and hydroxyl functional acrylic copolymer, and the mass fraction of solid is 50%), 60g wetting additive (the mass fraction of solid is the polyether-modified heptamethyltrisiloxane surfactant of 50%), and 1.42kg deionized water, Prepare the mixture. at 600min -1 The mixture was homogenized for 10 minutes using a Cowles dissolver. The resulting homogeneous mixture was degassed by standing at ambient temperature and pressure (23°C, 1013 hPa) for 24 hours.
[0073] By manual stirring, mix 1.63kg polyfunctional isocyanate crosslinking agent (hexamethylene diisocyanate trimer, no solvent added, and the mass fraction of isocyanate group-N=C=0 is 23%), 1.1kg hydrophilic modifier A non-toxic polyfunctional isocyanate crosslinking agent (based on...
Embodiment 3
[0075] The acrylic copolymer of embodiment 3 synthesis contrast
[0076] By mixing 7kg of water, 350g of an aqueous solution of fatty alcohol ether sulfate in the form of its sodium salt (mass fraction of solids is 27%, and pH is 7), and 100g of solids is 80% and the turbidity temperature "cloud point" is Aqueous solutions of mixtures of ethoxylated linear fatty alcohols at 63°C were used to prepare aqueous solutions of surfactants, wherein the cloud point was measured in 1% strength solutions in 10% strength aqueous sodium chloride.
[0077] 4kg deionized water was introduced into the reaction vessel, and under stirring, in 150min -1 25% by mass of the surfactant solution thus prepared was added to water. In another container, use the remaining 75% by mass of the surfactant solution to emulsify 3.3 kg of hydroxyethyl methacrylate, 1.8 kg of methyl methacrylate, 1 kg of styrene, 250 g of methacrylic acid and 3.65 kg of butyl acrylate monomer mixture. A 3% mass fraction of t...
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