A preparation method of papermaking sizing agent emulsified by flake solid particles
A technology of solid particles and sizing agent, applied in the direction of adding water repellents, etc., can solve the problems of low ASA emulsion concentration, large amount of particle components added, unfavorable emulsion storage, etc., achieving low emulsification cost, improving sizing performance, Low dosage effect
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Embodiment 1
[0020] The trialkoxysilane coupling agent (KH570, γ-methacryloxypropyltrimethoxysilane) and the flaky nano-bentonite solid particles with a particle size of 25nm (sodium carbonate modified sodium-based bentonite, original soil Taken from Zhejiang, provided by Zhejiang Sanding Technology Co., Ltd.) mixed by 10% mass percentage, deionized water is added to the mixture, the mass ratio of deionized water and sheet-like nano-bentonite solid particles is 10: 1, then add toluene or Absolute ethanol, the mass ratio of deionized water and flaky nano-bentonite solid particles is 30:1, heat and stir at 75°C for 6 hours, let stand and cool to room temperature to obtain a modified bentonite suspension, and then extract the resulting suspension , The solid obtained by extraction was washed repeatedly with toluene. The washed solids are dried and ground, and passed through a 200-mesh sieve, and the resulting sieve residue (not the residue in the sieve) is dispersed in deionized water (resist...
Embodiment 2
[0024] Trialkoxysilane coupling agent (KH550, γ-chloropropyltriethoxysilane) and flaky nano-bentonite solid particles with a particle size of 50nm (calcium carbonate modified calcium-based bentonite, the original soil was taken from Zhejiang, Provided by Zhejiang Sanding Technology Co., Ltd.) by 5% mass percentage, add deionized water to the mixture, the amount of deionized water relative to the mass ratio of bentonite solid particles is 20:1, then add toluene or absolute ethanol, the amount The mass ratio relative to the bentonite solid particles is 60:1, heated and stirred at 75°C for 8 hours, allowed to stand and cooled to room temperature to obtain a modified bentonite suspension, and then extract the obtained suspension, and extract the obtained solid with Repeated washing with toluene or ethanol. The solids after washing are dried and ground and passed through a 200-mesh sieve, and the resulting sieve residue is dispersed in deionized water and stirred evenly to obtain a...
Embodiment 3
[0028] The trialkoxysilane coupling agent (KH560, γ-glycidyl etheroxypropyltrimethoxysilane) and the flaky nano-bentonite with a particle size of 100nm (magnesium-based modified bentonite, the original soil was taken from Liaoning, by Chaoyang Rundong Products Sales Co., Ltd. Provided) the solid particles are mixed at a mass percentage of 2%, and deionized water is added to the mixture, the amount of deionized water relative to the mass ratio of the bentonite solid particles is 15:1, and then toluene or absolute ethanol is added, and the amount is relative to the bentonite solid particles The mass ratio of bentonite is 50:1, heated and stirred at 75°C for 5 hours, allowed to stand and cooled to room temperature to obtain a modified bentonite suspension, and then extracted the obtained suspension, and the extracted solid was repeatedly washed with toluene or ethanol . The solids after washing are dried and ground and passed through a 200-mesh sieve, and the resulting sieve resi...
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