Wanhua Chemical Obtains Patent for New Coating to Improve the Stability of Polyamide Powder Coating

On December 21, 2023, according to the announcement of the State Intellectual Property Office of China, Wanhua Chemical Group Co., Ltd. obtained a patent entitled "a high-adhesion anti-corrosion polyamide powder coating and its preparation method", authorized notice No. CN115746695B, the application date is October 2022.

The patent abstract shows that the present invention provides a high adhesion anti-corrosion polyamide powder coating and a preparation method thereof. The polyamide powder coating is a (BNNSs-OH)-PA/polyamide composite coating, in which the plant acid PA is loaded on hydroxy-functionalized hexagonal boron nitride nanosheet BNNSs‑OH. Through esterification with polyamide end group, the dispersion of polyamide powder coating with high adhesion and high barrier property is greatly improved. Phytic acid can give the powder coating higher adhesion, at the same time, it can be used as a corrosion inhibitor to improve the slow release efficiency, and the hexagonal network structure of hexagonal boron nitride provides good gas and liquid barrier property. The polyamide nylon powder coating of the invention has high adhesion and excellent anti-corrosion performance under the multi-synergistic anti-corrosion action of the two, and can be widely used in metal pipes, ships and other fields, overcomes the limitations of the application of the existing materials in high humidity environment, and improves the stability of the polyamide powder coating.