A kind of redispersing powder AKD sizing agent and its preparation method and application
A re-dispersion and sizing agent technology, which is applied in the direction of water-repellent addition, inorganic compound addition, paper, etc., can solve the problem of difficult dispersion of powder, and achieve the effects of protecting emulsion particles, convenient transportation and storage, and good water dispersibility
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Embodiment 1
[0032] Heat 38 parts by mass of deionized water to 70°C with a water bath, gradually add 3.5 parts by mass of cationic starch into the deionized water while stirring continuously, and add 1.5 parts by mass of sodium lignosulfonate at the same time, and stir at 10000r / min for 10min , to obtain starch gelatinization solution, the temperature is kept at 70°C, and it is set aside;
[0033] Weigh 15 parts by mass of industrial AKD wax powder and heat it in an emulsifier to a molten state; add the molten AKD to the starch gelatinization liquid prepared above, stir at a speed of about 2500r / min for 1min, and then adjust the speed to 15000r / min, stirring and emulsifying for 8min to obtain the emulsion;
[0034] The obtained emulsion was added to 39 parts by mass of ice deionized water, and 3 parts by mass of aluminum sulfate solution with a mass fraction of 40% were added at the same time, the rotating speed was adjusted to 3500r / min, and stirred to room temperature to obtain an AKD ...
Embodiment 2
[0040] Heat 38 parts by mass of deionized water to 70°C with a water bath, gradually add 2.5 parts by mass of cationic starch into the deionized water under constant stirring, and stir for 10 minutes at 10,000 r / min to obtain starch gelatinization solution, and keep the temperature at 70°C ,spare;
[0041] Weigh 13 parts by mass of industrial AKD wax powder and heat it to a molten state in an emulsifier; add the molten AKD to the starch gelatinization liquid prepared above, stir at a speed of about 2000r / min for 1min, and then adjust the speed to 18000r / min, stirring and emulsifying for 8min to obtain the emulsion;
[0042] The obtained emulsion was added to 42.5 parts by mass of ice-deionized water, and 4 parts by mass of aluminum sulfate solution with a mass fraction of 40% were added at the same time, the rotating speed was adjusted to 4000r / min, and stirred to room temperature to obtain an AKD emulsion with an AKD content of 13%. (Aggregation will occur between some AKD dr...
Embodiment 3
[0048] Heat 38 parts by mass of deionized water to 70°C with a water bath, gradually add 5 parts by mass of cationic starch into the deionized water under constant stirring, and stir at 10,000r / min for 10min to obtain starch gelatinization solution, and keep the temperature at 70°C ,spare;
[0049] Weigh 15 parts by mass of industrial AKD wax powder and heat it to a molten state in an emulsifier; add the molten AKD to the starch gelatinization liquid prepared above, stir at a speed of about 2500r / min for 1min, and then adjust the speed to 18000r / min, stirring and emulsifying for 8min to obtain the emulsion;
[0050] Gained emulsion is added to 42 mass parts of ice deionized water, the rotating speed is adjusted to 4000r / min, stirred to room temperature, the AKD emulsion that obtains the AKD content is 15% (aggregation will occur between some AKD droplets, and the emulsion gradually loses its Fluidity, become a paste, but the paste can still be dispersed in water), standby; ...
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Abstract
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