Hot melt adhesive and preparation method thereof and bicycle mudguard produced by hot melt adhesive
A hot-melt adhesive and composite filler technology, applied in the field of hot-melt adhesives, can solve problems such as poor impact resistance, environmental stress cracking resistance, and slow curing molding speed, so as to improve heat resistance, cohesive strength, and impact resistance Performance and durability, effect of increasing curing rate
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preparation example 1
[0042] (1) Pretreatment of raw materials: dry calcium hydrogen phosphate at 180°C and a vacuum of -0.1MPa for 12 hours; calcinate talcum powder and clay at 900°C for 2 hours, take them out, and add 2% hydrogen peroxide Soak in the solution for 4 hours, take out and dry, and set aside;
[0043] (2) Ball milling: mix pretreated calcium hydrogen phosphate 5Kg, talcum powder 10Kg, clay 3Kg, activated carbon 3Kg, silicon dioxide 8Kg, aluminum oxide 3Kg and calcium carbonate 1Kg, and use absolute ethanol as the medium for ball milling 1 hours, dried at 80°C, and passed through a 200-mesh sieve to obtain mixture A;
[0044] (3) Melting heat treatment: heat the mixture A obtained in step (2) to 1300°C, keep it warm for 3 hours, then quench, pass through a 200-mesh sieve, ball mill for 1 hour, dry at 80°C, and then cool down to obtain mixture B ;
[0045] (4) acid etching: adding concentration to the mixture B obtained in step (3) is 10% hydrofluoric acid to soak and etch for 20 minu...
preparation example 2
[0048](1) Raw material pretreatment: dry calcium hydrogen phosphate at 190°C and a vacuum of -0.1MPa for 14 hours; calcinate talcum powder and clay at 950°C for 1.5 hours, take them out, and add 2% hydrogen peroxide Soak in the solution for 5 hours, take out and dry, and set aside;
[0049] (2) Ball milling: mix 7Kg of calcium hydrogen phosphate after pretreatment, 15Kg of talc, 3.5Kg of pottery clay, 4Kg of activated carbon, 9Kg of silicon dioxide, 4Kg of aluminum oxide and 2Kg of calcium carbonate, and use absolute ethanol as the medium for ball milling 1 hour, drying at 80°C, and passing through a 200-mesh sieve to obtain mixture A;
[0050] (3) Melting heat treatment: heat the compound A obtained in step (2) to 1400°C, keep it warm for 2.5 hours, then quench, pass through a 200-mesh sieve, ball mill for 1 hour, dry at 80°C, and then cool down to obtain compound B ;
[0051] (4) acid etching: adding concentration to the mixture B obtained in step (3) is 10% hydrofluoric a...
preparation example 3
[0054] (1) Raw material pretreatment: dry calcium hydrogen phosphate at 200°C and a vacuum of -0.1MPa for 16 hours; calcinate talcum powder and clay at 1000°C for 1 hour, take them out, and add hydrogen peroxide with a concentration of 2% Soak in the solution for 6 hours, take out and dry, and set aside;
[0055] (2) Ball milling: mix the pretreated calcium hydrogen phosphate 8Kg, talcum powder 20Kg, pottery clay 4Kg, activated carbon 5Kg, silicon dioxide 10Kg, aluminum oxide 5Kg and calcium carbonate 3Kg, and use absolute ethanol as the medium for ball milling 1 hours, dried at 80°C, and passed through a 200-mesh sieve to obtain mixture A;
[0056] (3) Melting heat treatment: heat the mixture A obtained in step (2) to 1450°C, keep it warm for 2 hours, then quench, pass through a 200-mesh sieve, ball mill for 1 hour, dry at 80°C, and then cool down to obtain mixture B ;
[0057] (4) acid etching: adding concentration to the mixture B obtained in step (3) is 10% hydrofluoric ...
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