Method for preparing zinc phosphate-based composite antirust pigments by pin-pin nano ball mill
A nano-ball mill and anti-rust pigment technology, which is applied in anti-corrosion coatings, dyed low-molecular organic compound treatment, fibrous fillers, etc., can solve the problems of high corrosion of equipment, wide particle size dispersion range, and difficulty in large-scale production. Achieve the effect of high grinding efficiency and fineness of grinding materials
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[0034] The preparation of the zinc phosphate composite antirust pigment of the present invention uses a pin-type nano ball mill as a grinding device; the ball mill has ZrO 2 Ceramic liner and dispersing blades use ZrO with a diameter of 0.1-2mm 2 Ceramic grinding media, and equipped with chiller, batching bucket and diaphragm pump as auxiliary devices.
[0035] The method includes the following steps:
[0036] (1) Take deionized water, inorganic zinc phosphate antirust pigments, organic antirust pigments and dispersing aids at a weight ratio of 5-1:1:0.01-0.2:0.005-0.05, add them to the batching tank, and stir evenly;
[0037] (2) Start the cooling circulating water system, keep the circulating cooling water temperature at 5-20°C; start the diaphragm pump, inject the mixed slurry in the batching tank into the inner cavity of the ball mill, and the injection rate of the mixed slurry is 1-10L / min; start the ball mill for circular grinding, the grinding time is 60-180min;
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Embodiment 1
[0045] An organic-inorganic composite nano-zinc phosphate antirust pigment, the preparation method of which is:
[0046] (1) Add deionized water, zinc phosphate (5 μm), benzotriazole (BTA, 5 μm) and dispersant (BYK190) into the batching tank of the ball mill. Wherein, the weight ratio of water to zinc phosphate is 5.0:1.0, the weight ratio of dispersant to zinc phosphate is 0.005:1.0, and the weight ratio of BTA to zinc phosphate is 0.01:1;
[0047] (2) Start the chiller, keep the cooling water temperature at 20°C, start the diaphragm pump, inject the mixed slurry in the batching bucket into the inner cavity of the ball mill, and circulate the grinding, the slurry injection rate is 10L / min, the grinding time is 60min, ZrO 2 Grinding medium diameter 0.1~0.3mm;
[0048] (3) After grinding, the slurry was spray-dried to prepare a composite nano anti-rust pigment with an average particle size of 100 nm, which was used in the water-based two-component anti-corrosion coating formul...
Embodiment 2
[0050] An organic-inorganic composite nano-zinc phosphate antirust pigment, the preparation method of which is:
[0051] (1) Add deionized water, zinc phosphate (100 μm), benzotriazole (BTA, 100 μm) and dispersant (BYK190) into the batching tank of the ball mill. Wherein, the weight ratio of water to zinc phosphate is 1.0:1.0, the weight ratio of dispersant to zinc phosphate is 0.05:1.0, and the weight ratio of BTA to zinc phosphate is 0.2:1;
[0052] (2) Start the chiller, keep the cooling water temperature at 5°C, start the diaphragm pump, inject the mixed slurry in the batching bucket into the inner cavity of the ball mill, start grinding, the slurry injection rate is 1L / min, the grinding time is 180min, ZrO 2 Grinding medium diameter 1.0~2.0mm;
[0053] (3) After grinding, the slurry was spray-dried to prepare a composite anti-rust pigment nanopowder with an average particle size of 90nm, which was used in the water-based two-component anti-corrosion coating formulation s...
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