A kind of preparation method of flame-retardant and waterproof waterborne polyurethane coating
A water-based polyurethane, waterproof technology, applied in the direction of polyurea/polyurethane coatings, fire-resistant coatings, polyurea/polyurethane adhesives, etc. Effect
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example 1
[0030] (1) Add 60g of 3-aminopropyltrihydroxysilane, 84g of isophorone diisocyanate and 0.18g of tetramethylammonium hydroxide into a 500ml three-necked flask equipped with a stirrer, a condenser and a thermometer, and set the temperature at 70°C Reaction 1h, obtains polyurethane prepolymer A to be 144g;
[0031] (2) Add 1.14g of clomiphene citrate and 10.7g of adenosine cyclic phosphate to polyurethane prepolymer A, react at 60°C for 3h, add 14.2g of triethylamine and 0.6g of propylamine bromide Neutralize for 30 minutes, then add 4.1 g of boron trifluoride diethyl ether, react at 70 ° C for 1 h, add 80 g of water and 0.28 g of sodium dodecylsulfonate for emulsification for 60 min, and obtain a flame-retardant and waterproof water-based polyurethane coating.
example 2
[0033] (1) Add 60g of diphenyldihydroxysilane, 84g of isophorone diisocyanate and 0.72g of tetramethylammonium hydroxide into a 500ml three-necked flask equipped with a stirrer, condenser and thermometer, and react at 80°C for 3h , obtaining polyurethane prepolymer A is 144g;
[0034] (2) Add 4.07g of nicotinamide adenine dinucleotide phosphate, 4.07g of methyltrihydroxysilane and 58g of tris(2,3-dichloropropyl) phosphate to polyurethane prepolymer A, at 80℃ React at 70°C for 4h, add 20.7g of triethylamine and 5.2g of chlorpromazine for neutralization reaction for 60min, then add 2.38g of benzyltrimethylammonium fluoride, react at 70°C for 1h, add water 100g and dodecylsulfonic acid Sodium 0.58g was emulsified for 60 minutes to obtain a flame-retardant and waterproof water-based polyurethane coating.
example 3
[0036] (1) Add 80g of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether, 84g of isophorone diisocyanate and tetramethylhydrogen into a 500ml three-necked flask equipped with a stirrer, condenser and thermometer Ammonium oxide 0.27g was reacted at 75°C for 3h to obtain 164g of polyurethane prepolymer A;
[0037] (2) Add 5.7g of pyridoxal phosphate and 35g of 2-chloro-1-(2,4-dichlorophenyl) vinyl diethyl phosphate to polyurethane prepolymer A, and react at 70°C for 3.5 h, add 17.4g of triethylamine and 2.1g of niclosamide for neutralization reaction for 45min, add 2.7g of tetrabutylammonium fluoride and 2.1g of R-HCH, react at 70°C for 1h, add water 110g and dodeca 0.43 g of sodium alkyl sulfonate was emulsified for 60 minutes to obtain a flame-retardant and waterproof water-based polyurethane coating.
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