Preparation method of halogen-free flame-retardant composition and flame-retardant polyolefin composition consisting of same
A technology for a composition and a flame retardant, applied in the field of flame retardant composition, can solve the problems of multiple equipment, cost, unfavorable flame retardant performance stability, etc., and achieves low equipment requirements, good industrial application prospects, and simple and easy process. Effect
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[0060] Example 1
[0061] Put melamine phosphate and piperazine diphosphate in a molar ratio of 3:1, a total weight of 100kg, and an activator of nano zinc oxide 1kg, dimethyl polysiloxane 1kg, and nano calcium silicate 3kg, placed in a high-speed mixer After stirring and mixing uniformly, the halogen-free flame retardant composition premix is obtained; then the halogen-free flame retardant composition premix is placed in a Banbury mixer for high temperature dehydration condensation reaction to obtain 97.2 kg of coke (poly 1) A halogen-free flame retardant composition with melamine phosphate and piperazine pyro(poly)phosphate as main components, wherein the vacuum degree is controlled at 0.025MPa, the dehydration condensation temperature is 250°C, the rotation speed is 20rpm, and the heating time is 4h; The appearance, yield, phosphorus content and whiteness index (W value) of the halogen-free flame retardant composition were tested, and the results are listed in Table 1.
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[0062] Example 2
[0063] The molar ratio of melamine phosphate and piperazine diphosphate is 2.5:1, and the others are the same as in Example 1. The appearance, yield, phosphorus content and whiteness index (W value) of the halogen-free flame retardant composition are tested, and the results are Listed in Table 1.
Example Embodiment
[0064] Example 3
[0065] The molar ratio of melamine phosphate and piperazine diphosphate is 2:1, and the others are the same as in Example 1. The appearance, yield, phosphorus content and whiteness index (W value) of the halogen-free flame retardant composition are tested, and the results are Listed in Table 1.
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