Organic montmorillonite/halogen-free diphosphonate fire retardation PA6T/6 composite material and preparation method thereof
A technology of organic montmorillonite and halogen-free bisphosphonic acid, applied in the field of organic montmorillonite/halogen-free bisphosphonate flame-retardant PA6T/6 composite materials and its preparation, can solve the problem of reducing the physical properties of PA6T/6, Poor flame retardant effect of flame retardants, great environmental and human hazards, etc., to achieve good synergistic flame retardant effect, long-term flame retardant effect, and the effect of maintaining mechanical properties
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Embodiment 1)
[0027] Add 40g of purified terephthalic acid, 30g of propylenediamine and 75g of deionized water into the reactor, raise the temperature of the system to 90°C, stir thoroughly for 0.5 hours, adjust the pH of the solution at 7.5, add 30g of caprolactam, and mix evenly for 2 hours. Close the reactor and increase the reaction temperature to 280°C, keep the system pressure at 1.5MPa, keep the pressure for 2 hours, discharge the gas within 0.5 hours, and evacuate to 0.09MPa, keep it for 0.5 hours, cool down and discharge the material, the solid is crushed and deionized After washing with water and drying, put it into a reaction extruder, and extrude it at a temperature of 280°C and a vacuum of 0.09MPa for 10 minutes to obtain a PA6T / 6 resin. Mix 50g of PA6T / 6 resin, tetramethyl 1,2-ethylene bisphosphonate 12g and 3g of organic montmorillonite (OMMT) were added into the reactor and stirred, mixed evenly, sent to a twin-screw extruder, and reacted and extruded at a temperature of 280°...
Embodiment 2)
[0029] Add 600g of undecanedibasic acid, 450g of hexamethylenediamine and 1125g of deionized water into the reactor, raise the temperature of the system to 90°C, stir thoroughly for 1 hour, adjust the pH of the solution to 7.3, add 450g of caprolactam, and mix evenly for 2.5 hours , close the reactor, increase the reaction temperature to 290°C, keep the system pressure at 1.8MPa, hold the pressure for 2 hours, discharge the gas within 0.5 hours, and evacuate to 0.09MPa, keep it for 0.5 hours, cool down and discharge the material, the solid is crushed, removed After washing with ionic water and drying, add it to a reactive extruder, and react and extrude at a temperature of 290°C and a vacuum of 0.08MPa for 10 minutes to obtain PA6T / 6 resin. PA6T / 6 resin 200g, tetramethyl methylene bisphosphonate 50g and organic Add 15g of montmorillonite (OMMT) into the reactor, stir and mix evenly, send it into a twin-screw extruder, react and extrude at a temperature of 290°C and a vacuum of ...
Embodiment 3)
[0031]Add 360g of adipic acid, 270g of p-phenylenediamine and 680g of deionized water into the reactor, raise the temperature of the system to 90°C, stir thoroughly for 0.5 hours, adjust the pH of the solution at 7.2, add 270g of caprolactam, mix evenly for 1.5 hours, and seal The reactor raises the reaction temperature to 300°C, keeps the system pressure at 2.0MPa, keeps the pressure for 3.5 hours, discharges the gas within 0.5 hours, and evacuates to 0.08MPa, keeps it for 0.5 hours, cools down and discharges the material, the solid is crushed, deionized water After washing and drying, put it into a reactive extruder, and extrude it at a temperature of 300°C and a vacuum of 0.08MPa for 10 minutes to obtain a PA6T / 6 resin. Mix 300g of PA6T / 6 resin, 80g of tetraethyl 1,2-ethylene bisphosphonate Add 20g of organic montmorillonite (OMMT) into the reactor, stir, mix evenly, send it into a twin-screw extruder, react and extrude at a temperature of 300°C and a vacuum of 0.08MPa for 2...
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