Stable alkenyl succinic anhydride sizing emulsion for papermaking and preparation method thereof
An alkenyl succinic anhydride, sizing emulsion technology, applied in the direction of adding inorganic compounds, adding water repellents, etc., can solve the problems of easy generation of bubbles, reduced sizing efficiency, large amount of emulsifier, etc., and achieves good stability and application. The effect of high glue efficiency and simple emulsification process
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Embodiment 1
[0022] Preparation of emulsifier: disperse 0.85 parts of laponite in 45 parts of water to obtain laponite colloid, disperse 0.0042 parts of alanine in 38 parts of water to obtain alanine aqueous solution, mix the above two liquids, and adjust with acetic acid The pH value is 8, and it is prepared as an ASA emulsifier.
[0023] Emulsification of ASA: Weigh 17 parts of the industrial product ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:5, and use a high-speed stirring device to stir and emulsify at 5000 rpm for 10 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the mass percentage of ASA is about 17%, the emulsion is centrifuged under the centrifuge (speed 3000r / min) for 10min without change, no phase body precipitation, no Demulsification phenomenon.
[0024] In-pulp sizing effect: Take 100 parts of hardwood pulp and disperse in 9900 parts of water. After the dispersion is uniform, add 3 parts of ...
Embodiment 2
[0026] Preparation of emulsifier: disperse 0.5 part of laponite in 40 parts of water to obtain laponite colloid, disperse 0.0033 part of alanine in 10 parts of water to obtain alanine aqueous solution, mix the above two liquids, and adjust with hydrochloric acid The pH value is 5, and it is prepared as an ASA emulsifier.
[0027] Emulsification of ASA: Weigh 50 parts of industrial product ASA, add it to the emulsifier prepared above, keep the ratio of oil to water at 1:1, and use high-speed stirring equipment to stir and emulsify at 12000 rpm for 3 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the mass percentage of ASA is about 50%, the emulsion is centrifuged under the centrifuge (speed 3000r / min) for 10min without change, no phase body precipitation, no Demulsification phenomenon.
[0028] In-pulp sizing effect: Take 100 parts of hardwood pulp and disperse in 9900 parts of water. After the dispersion is uniform, add 1 part of the ...
Embodiment 3
[0030] Preparation of emulsifier: disperse 0.31 part of laponite in 40 parts of water to obtain laponite colloid, disperse 0.0039 part of alanine in 35 parts of water to obtain alanine aqueous solution, mix the above two liquids, and adjust with hydrochloric acid The pH value is 6, and it is prepared as an ASA emulsifier.
[0031]Emulsification of ASA: Weigh 25 parts of the industrial product ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:3, and use a high-speed stirring device to stir and emulsify at 7000 rpm for 5 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the mass percentage of ASA is about 25%, and the emulsion is centrifuged under the centrifuge (rotating speed 3000r / min) for 10min without change, no phase body precipitation, no Demulsification phenomenon.
[0032] In-pulp sizing effect: Take 100 parts of wheat hardwood pulp and disperse it in 9900 parts of water. After the dispersion is ...
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