Preparation method of modified metallocene polyethylene used for hot melt adhesive
A technology of metallocene polyethylene and hot melt adhesives, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problems of heat transfer, poor mass transfer effect, mild reaction conditions, low reaction temperature, etc. problems, to achieve the effect of good adhesion, mild reaction conditions, and low reaction temperature
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Embodiment 1
[0012] Embodiment 1 aqueous suspension method maleic anhydride grafted metallocene polyethylene
[0013] Accurately weigh 20.00g of metallocene polyethylene (mPE) (particle size: 0.01-1mm, the same below) as the dispersed phase and 2.00g of xylene, mix and stir evenly, then add to a four-necked flask with a reflux tube and a stirrer , then add 60.00gH 2 O as the dispersion medium, start the agitator, pre-mix for 30 minutes, heat up to 70°C, divide 12.00g maleic anhydride (MAH) and 0.30g BPO into three equal parts, add one part every half hour, wait until the addition is complete , and then after grafting reaction for 1 h, the reaction was terminated. The resulting product was filtered, washed three times with hot water, and dried to obtain maleic anhydride grafted metallocene polyethylene, which was used as a hot-melt adhesive matrix material. The performance parameters are shown in Table 1.
Embodiment 2
[0014] Embodiment 2 aqueous phase suspension method diethyl maleate grafted metallocene polyethylene
[0015] Accurately weigh 20.00g of mPE as the dispersed phase and 1.00g of toluene and 1.00g of xylene, mix and stir evenly, then add it into a four-necked flask with a reflux tube and a stirrer, and then add 200.00gH 2 O was used as the dispersion medium, and the agitator was started. After pre-mixing for 30 min, the temperature was raised to 90 °C, and then 2.00 g of diethyl maleate and 0.20 g of BPO were added to carry out the grafting reaction for 1 h, and then the reaction was terminated. The resulting product was filtered, washed with hot water, and dried to obtain diethyl maleate grafted metallocene polyethylene, and its performance parameters are shown in Table 1.
Embodiment 3
[0016] Embodiment 3 aqueous phase suspension method dibutyl maleate grafted metallocene polyethylene
[0017] Accurately weigh 20.00g of mPE as the dispersed phase, add it into a self-made reactor with a stirrer, and then add 100.00g of H 2 O as the dispersion medium, start the agitator, pre-mix for 30 minutes, heat up to 110°C, divide 2.00g dibutyl maleate (DBM) and 0.20g BPO into three parts, add one part every half hour, After the addition is complete, after another 0.5 h of grafting reaction, the reaction is terminated. The resulting product was filtered, washed with hot water, and dried to obtain dibutyl maleate grafted metallocene polyethylene, which can be used as a matrix material for hot-melt adhesives. The performance parameters are shown in Table 1.
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