Waterborne interpenetrating polymer network anticorrosive coating and preparation method
A water-based polymer and interpenetrating network technology, which is applied in the field of water-based polymer interpenetrating network anti-corrosion coatings and their preparation, can solve the problems of inability to guarantee the drying of water-based polyurethane paints for 48 hours and poor water resistance, and achieves improved adhesion and comprehensive performance. Good, broaden the effect of the application field
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[0045] The preparation method of waterborne polymer interpenetrating network anticorrosion coating of the present invention comprises the following steps:
[0046] 1) Take 15-25 parts of deionized water, 0.2-0.5 parts of defoamer (tego901W, tego902W), 2-5 parts of dispersant (BYK190, BYK194N), 0.4-0.8 part of wetting agent (BYK381, BYK349, tego4100) , 0.3-0.6 parts of thixotropic agent (BYK420, Deqian 299) were mixed, and dispersed at 800r / min for 15-20min to obtain mixture I;
[0047] 2) Under low-speed stirring, gradually add 20-55 parts of corrosion-inhibiting pigments and fillers (zinc phosphate, aluminum tripolyphosphate, zinc chrome yellow, strontium chrome yellow, iron oxide red, iron-titanium powder, methylbenzotriazole, titanium white powder, carbon black) into mixture I, disperse at 800r / min for 20-25min, enter into a sand mill and grind until the fineness is ≤25μm, and obtain mixture II;
[0048] 3) Under low-speed stirring, gradually mix 7-10 parts of alkyd emulsi...
Embodiment 1
[0058] Example 1: Black
[0059] Component A totals 100 parts:
[0060]
[0061]
[0062] A:B:C=10:2:3
[0063] The preparation method is:
[0064] The preparation process of the first component (color paint component) is as follows:
[0065] 1) Add the required amount of deionized water into the dispersion tank, add the required defoamer, dispersant, wetting agent, and thixotropic agent, and disperse at 1200r / min for 15-20min to obtain the mixture I;
[0066] 2) Under low-speed stirring, gradually add a certain amount of corrosion-inhibiting pigments and fillers to the mixture I, and disperse at 1200r / min for 20-25min. After the dispersion is completed, enter the sand mill for grinding to a fineness of ≤25μm to obtain the mixture II.
[0067] 3) Under low-speed stirring, gradually add a certain amount of alkyd emulsion, epoxy emulsion, and water-based polyester resin to the mixture II, stir evenly, and use a thixotropic agent to adjust the viscosity to meet the requi...
Embodiment 2
[0074] Example 2: iron red
[0075] Component A totals 100 parts:
[0076]
[0077]
[0078] A:B:C=10:1.5:2.5
[0079] The preparation method is the same as in Example 1, wherein the alkyd emulsion is a water-based alkyd emulsion, which is prepared by the following method:
[0080] ① Add 50 parts of deionized water, 0.5 parts of emulsifier K12 and 35 parts of acrylate monomer ST to the container according to the mass ratio, and disperse at 300r / min for 30 minutes to make milky white pre-emulsion I; add 12 parts into the container according to the mass ratio Deionized water, 0.4 parts of emulsifier sodium dodecylsulfonate K12 and 8 parts of rosin were dispersed at 300r / min for 30min to make light yellow emulsion pre-emulsion II; add 3 parts of deionized water, 0.10 part of initiator APS, 0.01 part of NaHCO 3 Disperse at 300r / min for 30min to make pre-initiator III;
[0081] ②Introduce nitrogen into the container, add 1 / 3 of the pre-emulsion I to the container, heat it...
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