Preparation method of flame-retardant and antibacterial waterborne polyurethane coating and adhesive
A water-based polyurethane and antibacterial technology, which is applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, antifouling/underwater coatings, etc., can solve problems such as limitations and expensive fluororesins, and achieve increased expansion rate, Increased carbon remaining rate and long-lasting flame retardancy
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example 1
[0019] The preparation method of flame-retardant, antibacterial waterborne polyurethane coating and adhesive, its preparation method is:
[0020] (1) Add 0.05g of dibutyltin dilaurate, 73g of polytetrahydrofuran ether glycol and 16g of isocyanate into a 250ml three-necked flask equipped with a stirrer, condenser, and thermometer, and react at 70°C for 1 hour to obtain a polyurethane prepolymer A;
[0021](2) Add 3.1g of flame retardant A, 1.5g of antibacterial agent and 16.7g of solvent acetone to polyurethane prepolymer A, react at 60°C for 2h, add 6.7g of triethylamine for neutralization reaction for 90min, 80 g of water was added and stirred and emulsified for 0.5 h to obtain a flame-retardant and antibacterial water-based polyurethane coating and adhesive.
[0022] The preparation method of the flame retardant A is as follows: 0.6mol of dimethyl phosphite is added in a three-necked flask, catalyst A0.01mol and 0.66mol of acrylamide are added, a stirring paddle is connecte...
example 2
[0029] The preparation method of flame-retardant, antibacterial waterborne polyurethane coating and adhesive, its preparation method is:
[0030] (1) Add 0.05g of dibutyltin dilaurate, 73g of polytetrahydrofuran ether glycol, and 16g of isocyanate into a 250ml three-necked flask equipped with a stirrer, condenser, and thermometer, and react at 90°C for 3 hours to obtain a polyurethane prepolymer A;
[0031] (2) Add 3.1g of flame retardant A, 1.5g of antibacterial agent and 16.7g of solvent acetone to polyurethane prepolymer A, react at 90°C for 4h, add 6.7g of triethylamine for neutralization reaction for 90min, Add 90 g of water and carry out stirring and emulsification for 0.5 h to obtain flame-retardant and antibacterial water-based polyurethane coatings and adhesives.
[0032] The preparation method of the flame retardant A is as follows: 0.6mol of dimethyl phosphite is added in a three-necked flask, catalyst A0.01mol and 0.9mol of acrylamide are added, a stirring paddle ...
example 3
[0038] The preparation method of flame-retardant, antibacterial waterborne polyurethane coating and adhesive, its preparation method is:
[0039] (1) Add 0.05g of dibutyltin dilaurate, 73g of polytetrahydrofuran ether glycol, and 16g of isocyanate into a 250ml three-necked flask equipped with a stirrer, condenser, and thermometer, and react at 80°C for 2 hours to obtain a polyurethane prepolymer A;
[0040] (2) Add 3.1g of flame retardant A, 1.5g of antibacterial agent and 16.7g of solvent acetone to polyurethane prepolymer A, react at 75°C for 3h, add 6.7g of triethylamine for neutralization reaction for 90min, Add 85 g of water and carry out stirring and emulsification for 0.5 h to obtain flame-retardant and antibacterial water-based polyurethane coatings and adhesives.
[0041] The preparation method of the flame retardant A is as follows: add 0.6mol of dimethyl phosphite into a three-necked flask, add 0.01mol of catalyst A and 0.78mol of acrylamide, connect a stirring pad...
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