Weather-resistant, flame retardant and impact-resistant polystyrene material, and preparation method
A polystyrene and polystyrene resin technology, applied in the field of polystyrene materials and preparation, can solve the problems of reducing the strength and toughness of the material, increasing the impact strength, increasing the molding of the material, etc., and achieves easy molding, high weather resistance, Production cost reduction effect
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[0034] Example 1
[0035] (1) Weigh 100 parts of polystyrene resin, 24 parts of styrene-butadiene-styrene copolymer, 8 parts of nano calcium carbonate (average particle size of 60nm), 0.8 parts of N-cyclohexylethanolamine and (β- (3,5 di-tert-butyl 4-hydroxy-phenyl) propionic acid] 0.6 parts of pentaerythritol ester, 0.5 parts of 2-hydroxy-4-methoxybenzophenone, 6 parts of epoxy resin coated ammonium polyphosphate and 4 parts of melamine cyanurate, 1 part of zinc borate, and 2.8 parts of calcium stearate are placed in the reaction kettle, and stirred and mixed for 40 minutes at 85°C and normal pressure;
[0036] (2) After mixing, put the materials into a 54mm diameter screw extruder for granulation. The screw length-to-diameter ratio is 35, the speed is 65r / min, and the barrel temperature is: 170~180℃, 190~200℃, 200~210℃, head temperature 195~200℃;
[0037] (3) After granulation, the pellets are dried at 85°C for 2 hours and then injection molded. The injection temperature is 200-2...
Example Embodiment
[0039] Example 2
[0040] (1) Weigh 100 parts of polystyrene resin, 20 parts of EPDM rubber, 15 parts of nano titanium dioxide (average particle size of 50nm), 1.0 part of stearyl thiodipropionate and [β-(3,5) Di-tert-butyl 4-hydroxy-phenyl) propionic acid] pentaerythritol ester 0.5 part, tris(1,2,2,6,6-pentamethylpiperidine) phosphite 0.2 part, polyurethane elastomer coated polyphosphoric acid Place 5 parts of ammonium, 3 parts of melamine cyanurate, 2 parts of antimony trioxide, and 2.5 parts of zinc stearate in the reaction kettle, stir and mix for 35 minutes at 90°C and normal pressure;
[0041] (2) After mixing, put the materials into a 46mm diameter screw extruder for granulation, the screw length to diameter ratio is 32, the rotation speed is 80r / min, and the barrel temperature is: 165~175℃, 180~190℃, 200~210℃, head temperature 190~195℃;
[0042] (3) After granulation, the pellets are dried at 80°C for 2.5 hours and then injection molded. The injection temperature is 195-200...
Example Embodiment
[0044] Example 3
[0045] (1) Weigh 100 parts of polystyrene resin, 32 parts of styrene-butadiene-styrene copolymer, 25 parts of nano barium sulfate (average particle size of 55nm), 0.6 part of dilauryl thiodipropionate and 1,1,3-Tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane 0.4 part, 2-hydroxy-4-methoxybenzophenone 0.6 part, epoxy resin coating 6 parts of ammonium polyphosphate, 6 parts of melamine octamolybdate, 4 parts of molybdenum oxide, 3.5 parts of calcium stearate are placed in the reaction kettle, and stirred and mixed for 45 minutes at 80°C and normal pressure;
[0046] (2) After mixing, put the materials into a 62mm diameter screw extruder for granulation. The screw length to diameter ratio is 40, the speed is 55r / min, and the barrel temperature is: 160~170℃, 180~190℃, 205~215℃, head temperature 185~190℃;
[0047] (3) After granulation, the pellets are dried at 85°C for 2 hours before injection molding. The injection temperature is 190~195°C, the mold temperature is ...
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