Preparation method of flame-retardant polyurethane resin
A technology of polyurethane resin and phosphate ester, which is applied in the field of preparation of flame retardant resin materials, can solve the problems of decreased comprehensive performance of materials, poor dispersion of flame retardants, migration of flame retardants, etc., achieves excellent mechanical properties, improves mechanical properties and resistance Combustibility, the method is simple and easy to control the effect
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[0022] Example 1
[0023] (1) Add 3.08g of β-cyclodextrin and 1.54g of resorcinol bis(diphenyl) phosphate to 30ml of DMAc solution, and mix thoroughly for 1 hour at 50°C to form β-cyclodextrin / RDP Complex;
[0024] (2) standing for precipitation, filtration, vacuum drying, adding 10 ml of ethanol, washing excess RDP to obtain β-cyclodextrin / RDP inclusion complex;
[0025] (3) Take 0.53g of β-cyclodextrin / RDP inclusion compound, add it to 35g of polyurethane resin with a solid content of 30%, add 16ml of DMAc to dissolve, fully stir at room temperature, stand, defoaming, and shape, to prepare polyurethane barrier Combustion films and splines.
Example Embodiment
[0026] Example 2
[0027] (1) 3.27g of β-cyclodextrin and 3.27g of resorcinol bis(diphenyl) phosphate were added to 30ml of DMAc solution and mixed thoroughly for 2h at 55°C to form β-cyclodextrin / RDP Complex;
[0028] (2) stand for precipitation, filter, vacuum dry, add 15ml of ethanol, wash excess RDP to obtain β-cyclodextrin / RDP inclusion complex;
[0029] (3) Take 1.05g of β-cyclodextrin / RDP inclusion compound, add it to 35g of polyurethane resin with a solid content of 30%, add 14ml of DMAc to dissolve, fully stir at room temperature, stand, defoaming, and shape, to prepare polyurethane barrier Combustion films and splines.
Example Embodiment
[0030] Example 3
[0031] (1) 2.59g of β-cyclodextrin and 5.18g of resorcinol bis(diphenyl) phosphate were added to 25ml of DMAc solution and mixed thoroughly for 3 hours at 60°C to form β-cyclodextrin / RDP Complex;
[0032] (2) stand for precipitation, filter, vacuum dry, add 25ml of ethanol, wash excess RDP to obtain β-cyclodextrin / RDP inclusion complex;
[0033] (3) Take 1.58g of β-cyclodextrin / RDP inclusion compound, add it to 35g of polyurethane resin with a solid content of 30%, add 12ml of DMAc to dissolve, fully stir at room temperature, stand, defoaming, and shape, to prepare polyurethane barrier Combustion films and splines.
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