Aqueous anti-adhesion coating for iron substrate

[0081] Put the polyethersulfone, titanium dioxide pigment and the mixed solvent of the present invention into the container according to the ratio shown in Table 2, disperse with a high-speed disperser (800-960 rpm) for 30 minutes, and pass through a 200-400 mesh filter Filter, then add polytetrafluoroethylene powder (Solvay (Shanghai) Co., Ltd., 538#) according to the following ratio, and stir at a low speed (60-100 rpm) for about 20 minutes to obtain the anti-blocking coating of the present invention .

[0082] Table 2

[0083]

[0084] *The type number of the mixed solvent corresponds to Table 1, that is, "1#" corresponds to the mixed solution 1# in Table 1, and so on.

[0090] According to the content of the following table 4, the coatings of Examples 1-9 and Comparative Examples 1-3 are sprayed on the iron substrate in different ways (single layer, double layer or multi-layer), and the coatings of Preparation Examples 1-8 are obtained. layer.

[0091] Table 4

[0092]

[0093] The coating products of the preparation examples of the present invention were evaluated according to the test examples described above, and the effects of the coatings of the preparation examples are shown in Table 5.

[0094] table 5

[0095]

[0096] The above results show that: the anti-blocking coating of the present invention reduces the amount of organic solvent due to the use of polyethersulfone and polytetrafluoroethylene in a specific ratio. The prepared coating has good salt corrosion resistance, hardness and wear resistance, especially on iron substrates, and its adhesion and non-stick properties are obviously better than those formed by traditional an