A kind of halogen-free flame-retardant polypropylene film and preparation method thereof
A technology of flame-retardant polypropylene and polypropylene film, which is applied in the field of flame-retardant polypropylene film, can solve the problems of poor comprehensive properties such as flame-retardant and mechanical properties of flame-retardant polypropylene film, and achieve excellent mechanical properties and thermal stability The effect of good and good application prospects
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[0062] The preparation method of the halogen-free flame-retardant polypropylene masterbatch provided by the invention comprises the following steps:
[0063] (1) Mixing flame retardant: Weigh APP, CA, AO and REC, add to high-speed mixer and mix at high speed for 5-15min.
[0064] The titanate coupling agent TC-101 was dissolved in a mixed solution of water and alcohol to prepare a mixed solution of titanate coupling agent (45%), alcohol (40%) and water (5%). The dosage of the titanate coupling agent is about 1% of the total weight of the flame retardant (that is, the total weight of APP, CA, AO and REC), and it is added to the uniformly mixed flame retardant. Then mix at high speed for 5-15 minutes, take it out and dry it in an oven for later use.
[0065] (2) Extrusion granulation
[0066] The composite flame retardant processed in the above step (1) is added together with the PP resin into a twin-screw extruder for extrusion and granulation, the processing temperature is 2...
Embodiment 1
[0076] Embodiment 1, prepare charcoal agent
[0077] Add 1mol of cyanuric chloride into 400ml of water and stir to disperse the cyanuric chloride evenly, then dropwise add 1mol of diethylenetriamine and the aqueous solution made of 40g of NaOH at the same time at a temperature of 0-5°C, the speed of adding the aqueous NaOH solution should be Control the pH of the reaction system at 6-7, and react for 2 hours; after raising the temperature of the reaction system to 30°C, continue to stir while adding 1mol of ethylenediamine and an aqueous solution made of 41g of NaOH to it, and add NaOH dropwise The speed of the aqueous solution should be such that the pH of the reaction system is controlled at 6-7, and the reaction lasts for 8 hours; after the temperature of the reaction system is raised to 90°C, 1mol of diethylenetriamine and 40g of NaOH are added dropwise to it while stirring. Aqueous solution, the speed of adding NaOH aqueous solution dropwise should make the pH of the reac...
Embodiment 2
[0079] Embodiment 2, prepare charcoal agent
[0080] Add 1mol cyanuric chloride into 500ml acetone and stir to disperse the cyanuric chloride evenly, then add 0.5mol ethylenediamine dropwise at a temperature of 10-15°C and use 70g K 2 CO 3 Prepared aqueous solution, add K dropwise 2 CO 3 The speed of the aqueous solution should be such that the pH of the reaction system is controlled at 5-7, and the reaction lasts for 2.5 hours; after the temperature of the reaction system is raised to 40°C, 1mol of ethylenediamine and 69g of K 2 CO 3 Prepared aqueous solution, add K dropwise 2 CO 3 The speed of the aqueous solution should be such that the pH of the reaction system is controlled at 5-7, and the reaction lasts for 13 hours; after the temperature of the reaction system is raised to 95°C, 0.5mol of ethylenediamine is added dropwise to it while stirring and 69g of K 2 CO 3 Prepared aqueous solution, add K dropwise 2 CO 3 The speed of the aqueous solution should make the p...
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Abstract
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