Water-based non-stick coating and preparation method thereof

Abstract

The invention belongs to the field of coatings, and discloses a water-based non-stick coating. The water-based non-stick coating comprises a primer and a finishing coat. The primer comprises the following components in parts by weight: 15 to 35 parts of a polytetrafluoroethylene emulsion, 1 to 15 parts of a catalyst, 0.1 to 15 parts of a pigment, 0.1 to 15 parts of a filler, 0 to 15 parts of water, 5 to 30 parts of a water-based polyethersulfone resin emulsion, 5 to 30 parts of modified polyamide-imide resin and 5 to 20 parts of a thickening agent. The finishing coat comprises the following components in parts by weight: 50 to 70 parts of a polytetrafluoroethylene emulsion, 5 to 15 parts of a modified acrylic emulsion, 1 to 25 parts of a thickening agent, 0 to 7 parts of a pigment, 5 to 20parts of water and 0.5 to 2 parts of a catalyst. The water-based non-stick coating disclosed by the invention does not use an auxiliary agent, namely a perfluorooctanoate compound which is harmful toa human body, meets the requirements of environmental protection, can endure salt for 50 hours in salt spray tests and has hardness of 4-5 H.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a water-based non-stick coating and a preparation method thereof. Background technique [0002] At present, the more commonly used internal coatings for tableware in the market are polytetrafluoroethylene coatings, which have better non-stick and chemical resistance properties. However, the comprehensive performance of most coatings is relatively poor, and the gap with the increasingly high demand of the market is getting wider and wider. For example, the texture of the coating is relatively soft and the corrosion resistance is poor (it only takes 6-12 hours to boil 10% salt water for ordinary coatings), the non-stickiness of the coating decreases significantly after the coating is worn, and the wear resistance is relatively poor. Some obvious disadvantages, and once there is damage It is easy to be corroded and peeled off, reducing the service life of the coating. Therefore...

AI Technical Summary

Problems solved by technology

However, the comprehensive performance of most coatings is relatively poor, and the gap with the increasingly high demand of the market is getting wider and wider.

For example, the texture of the coating is relatively soft, and the corrosion resistance is poor (it only takes 6-12 hours to boil 10% salt water for ordinary coatings), the non-stickiness of the coating decreases significantly after the coating is worn, and the wear resistance is relatively poor. Some obvious disadvantages, and once there is damage It is easy to be corroded and peeled off, reducing the service life of the coating

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