Safety box capable of preventing fire
A safe and fireproof coating technology, which is applied in the field of safes, can solve the problems of not being able to increase the airtightness between the cabinet door and the safe shell, not being able to fix the layered board and the placement slot conveniently, and not being able to adjust the distance between the layered boards. , to achieve the effects of simple structure, increased sealing, and convenient operation
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Embodiment 1
[0031] Example 1 Preparation of polymer of formula (1)
[0032] Step 1: Weigh 1.5mol of dimethyl phosphonate into the reaction flask, add 100mL of dichloromethane to dissolve, then pass nitrogen, add 0.5mol of trimethylchlorosilane, react at room temperature for 3h, stop the reaction, wash with salt water for 3 times, dried with anhydrous magnesium sulfate;
[0033] Step 2: Weigh 1 mol of 4,4'-diaminophenyl hydroxyphosphine oxide into a reaction flask, add 100 ml of dichloromethane to dissolve, then pass nitrogen gas, add 0.5 mol of trimethylchlorosilane, react at room temperature for 3 hours, stop Reaction, washed 3 times with brine, and dried over anhydrous magnesium sulfate;
[0034] Step 3: Weigh 1 mol of the obtained product of step 1, 1 mol of the obtained product of step 2 and 0.01 mol of triethylamine, mix them uniformly in the polymerization kettle, react at 370 ° C for 8 h, stop the reaction, cool to room temperature, vacuum dry, wash with water, dry and dry. It is...
Embodiment 2
[0035] The preparation of embodiment 2 light steel fire retardant coating
[0036] Weigh 500g of the polymer of formula (1), 300g of polyurethane resin, 150g of epoxy-modified polyester resin, 250g of ammonium polyphosphate, 8g of pentaerythritol, 8g of melamine and 200g of solvent oil, add them to the reaction kettle, stir at 80-120°C, and wait for the material After mixing uniformly, cool down to 50~60℃, add 20g bentonite, continue stirring at 50~60℃ for 20 minutes, add 150g titanium dioxide, 150g nano silicon dioxide, 80g lithium silicate, stir well, and cool to room temperature to get .
Embodiment 3
[0037] The preparation of embodiment 3 light steel fireproof coating
[0038] Weigh 800g of the polymer of formula (1), 250g of polyurethane resin, 100g of epoxy-modified polyester resin, 200g of ammonium polyphosphate, 4g of pentaerythritol, 4g of melamine and 200g of solvent oil and add it to the reaction kettle, stir at 80-120°C, and wait for the material After mixing uniformly, cool down to 50~60℃, add 15g bentonite, continue stirring at 50~60℃ for 20 minutes, add 150g titanium dioxide, 100g nano silicon dioxide, 50g lithium silicate, stir well, and cool to room temperature to get .
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