Antimony-based compounding flame retardant masterbatch for PVC and preparation method thereof
A flame-retardant masterbatch and antimony-based technology, which is applied in the field of flame-retardant materials, can solve the problems of limited flame-retardant and smoke suppression effects, difficulty in general use, and no patents found for antimony-based flame-retardant masterbatches. Environmental protection, cost saving, and improved flame retardant effect
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[0028] Example 1
[0029] Weigh separately according to the following proportions: 35 kg of PVC resin, 40 kg of antimony trioxide (main content above 99.6%, particle size 1.0μm), 25 kg of molybdenum trioxide, 13 kg of montmorillonite, 8 kg of organic tin, titanic acid Ester coupling agent 6 kg.
[0030] S1: Antimony trioxide modification: Weigh antimony trioxide and titanate according to the above amount and put them into a high-speed mixer for modification. The modification temperature is 140°C, the stirring rate is 4000rpm / min, and the stirring time is 3.5h;
[0031] S2: Put the modified antimony trioxide and other components (except PVC resin particles) into a variable frequency high-speed mixer for high-speed mixing, with a rotation speed of 3000 rpm / min, and a temperature of 75°C; mix the homogeneous materials Transfer to the secondary mixing equipment, add PVC resin pellets, and mix at low speed with a rotation speed of 900 rpm / min, a mixing time of 7 minutes, and no temperatu...
Example Embodiment
[0034] Example 2
[0035] Weigh separately according to the following proportions: PVC resin 20 kg, antimony trioxide 25 kg (main content 99.6% or more, particle size 1.0μm), molybdenum trioxide 13 kg, montmorillonite 8 kg, organotin 3 kg, aluminate Ester coupling agent 3 kg.
[0036] S1: Antimony trioxide modification: Weigh antimony trioxide and titanate according to the above-mentioned amount and put them into a high-speed mixer for modification. The modification temperature is 100°C, the stirring rate is 2000rpm / min, and the stirring time is 4.5h.
[0037] S2: Put the modified antimony trioxide and other components (except PVC resin particles) into a variable frequency high-speed mixer for high-speed mixing, with a rotation speed of 2000 rpm / min and a temperature of 90°C; mix the homogeneous materials Transfer to the secondary mixing equipment, add PVC resin pellets, and mix at a low speed with a rotation speed of 6000 rpm / min, a mixing time of 10 minutes, and no temperature con...
Example Embodiment
[0040] Example 3
[0041] Weigh separately according to the following proportions: 28 kg of PVC resin, 32 kg of antimony trioxide (main content above 99.6%, particle size 1.0μm), 19 kg of molybdenum trioxide, 10 kg of montmorillonite, 6 kg of organic tin, titanic acid Ester coupling agent 4 kg.
[0042] S1: Antimony trioxide modification: Weigh antimony trioxide and titanate according to the above-mentioned amount and put them into a high-speed mixer for modification. The modification temperature is 120°C, the stirring rate is 3000rpm / min, and the stirring time is 4h.
[0043] S2: Put the modified antimony trioxide and other components (except PVC resin particles) into a variable frequency high-speed mixer for high-speed mixing, at a speed of 4000 rpm / min, and a temperature of 60°C; mix the homogeneous materials Transfer to the secondary mixing equipment, add PVC resin pellets, and mix at low speed with a rotation speed of 1200 rpm / min, a mixing time of 5 minutes, and no temperature...
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