PBT environment-friendly and flame-retardant material toughened and reinforced by blending elastomer and micrometer particles

[0021] Example 1:

[0022] A kind of elastomer and micro-particles are blended and toughened to strengthen PBT environment-friendly flame retardant material. , 10% of micron calcium carbonate, 0.3% of stearic acid, 0.6% of polysiloxane, 0.8% of the compound of main antioxidant 1076 and auxiliary antioxidant 168, 0.3% of benzotriazole light stabilizer, of which, The average particle size of micron calcium carbonate is between 1 μm and 10 μm.

[0023] Preparation method: (1) Dry PBT at 130 ℃ ~ 140 ℃ for 3 to 5 hours, control the moisture content below 0.03%, and wait for use; (2) After weighing the micron calcium carbonate and stearic acid by weight , add it into an ultrasonic oscillator or a high-speed mixer with a speed of not less than 3000 rpm, stir at a temperature of 80 to 120 °C for 10 to 60 minutes to make it evenly dispersed, and then cool to below 40 °C to obtain a surface-treated Micron calcium carbonate; (3) Weigh the ethylene-octene copolymer elastomer according to the weight ratio, mix it with the above-mentioned surface-treated micron calcium carbonate, add it into a double-roller mill or an internal mixer, and heat it at 120℃~ Mixing at 140°C for 5-10 minutes, and then pulling and cutting to make ethylene-octene copolymer elastomer/micron calcium carbonate masterbatch; (4) Weigh the dried PBT and phosphonic acid according to the weight ratio. Compound of ester flame retardant, polysiloxane, primary antioxidant 1076 and secondary antioxidant 168 and benzotriazole light stabilizer, added to high-speed mixer, and ethylene-octene copolymer elastomer/micron Calcium carbonate masterbatch, mix thoroughly for 3 to 10 minutes; (5) add the mixture of step (4) into the co-rotating twin-screw extruder, control the screw speed to be 200 to 500 rpm, and the barrel temperature to be 205 ℃~240℃, through the twin-screw extruder blending, extrusion granulation, that is, a kind of elastomer and micro-particles blending toughening and strengthening PBT environmental protection flame retardant material.

[0024] Example 2:

[0025] A kind of elastomer and micro-particles are blended and toughened to strengthen PBT environment-friendly flame retardant material. Elastomer 15%, Micron Calcium Carbonate 15%, Calcium Stearate 0.4%, Ethylenebis Stearamide 1%, Compound 0.4% of Primary Antioxidant 1076 and Secondary Antioxidant 168, Benzophenone Light Stabilizer 0.2%, wherein the average particle size of micron calcium carbonate is between 1 μm and 10 μm.

[0026] Preparation method: (1) Dry the PBT at 130°C to 140°C for 3 to 5 hours, control the moisture content below 0.03%, and wait for use; (2) Weigh the micron calcium carbonate and calcium stearate by weight. Then, add it into an ultrasonic oscillator or a high-speed mixer with a speed of not less than 3000 rpm, stir at a temperature of 80 to 120 °C for 10 to 60 minutes to make it evenly dispersed, and then cool to below 40 °C to obtain a surface treatment (3) Weigh the acrylonitrile-butadiene-styrene copolymer elastomer according to the weight ratio, mix it evenly with the above-mentioned surface-treated micron calcium carbonate, and add it into a double-roller mill or an internal mixer. Mixing at 120 ℃ ~ 140 ℃ for 5 ~ 10 minutes, and then pulling and cutting to make acrylonitrile-butadiene-styrene copolymer elastomer/micron calcium carbonate masterbatch; (4) Prepare by weight Weigh the dried PBT, phosphate ester flame retardant, ethylene bis-stearamide, the compound of main antioxidant 1076 and auxiliary antioxidant 168, and benzophenone light stabilizer, and add them to a high-speed mixer. At the same time, add acrylonitrile-butadiene-styrene copolymer elastomer/micron calcium carbonate masterbatch, and mix thoroughly for 3 to 10 minutes; (5) Add the mixture of step (4) into the co-rotating twin-screw extruder. , control the screw speed to be 200-500 r/min, the barrel temperature to be 205-240°C, and blend, extrude and granulate through a twin-screw extruder to obtain a kind of elastomer and micro-particle blending, toughening and strengthening. PBT environmentally friendly flame retardant material.

[0027] Example 3:

[0028] An elastomer and micro-particles are blended and toughened to strengthen PBT environment-friendly flame retardant material. 5% of the copolymer of lylic anhydride, 5% of micron diatomaceous earth, 0.1% of silane coupling agent, 1.5% of polysiloxane, 0.4% of the compound of main antioxidant 1076 and auxiliary antioxidant 168, among which, micron The average particle size of diatomaceous earth is between 1 μm and 10 μm.

[0029] Preparation method: (1) Dry the PBT at 130 ℃ ~ 140 ℃ for 3 to 5 hours, control the moisture content below 0.03%, and wait for use; (2) weigh the micron diatomite and silane coupling agent by weight After taking it, add it into an ultrasonic oscillator or a high-speed mixer with a speed of not less than 3000 rpm, stir at a temperature of 80 to 120 °C for 10 to 60 minutes to make it evenly dispersed, and then cool to below 40 °C to obtain a surface (3) Weigh the copolymer of ethylene-octene copolymerized elastomer grafted with maleic anhydride according to the weight ratio, mix it with the above-mentioned surface-treated micro-diatomite, and add it to the double-roller opening. Mixing at 120℃~140℃ for 5~10 minutes in a mixer or an internal mixer, and then pulling and cutting to make a copolymer of ethylene-octene copolymer elastomer grafted with maleic anhydride/micron diatom Soil master batch; (4) Weigh the dried PBT, polysilane flame retardant, polysiloxane, main antioxidant 1076 and auxiliary antioxidant 168 compound according to the weight ratio, add it to the high-speed mixer At the same time, add the copolymer of ethylene-octene copolymerized elastomer grafted with maleic anhydride/micron diatomite masterbatch, and mix thoroughly for 3-10 minutes; (5) Add the mixture of step (4) into the co-rotating twin-screw In the extruder, the speed of the screw is controlled to be 200-500 rpm, and the temperature of the barrel is 205°C to 240°C. The twin-screw extruder is used for blending, extrusion and granulation to obtain an elastomer and microparticles. Hybrid toughening reinforced PBT environmentally friendly flame retardant material.