High-wear-resistance non-stick coating special for cooker and preparation method thereof

Abstract

The invention relates to the field of coatings, and discloses a high-wear-resistance non-stick coating special for a cooker. The coating comprises a primary layer coating body and a non-primary layercoating body; each of the primary layer coating body and the non-primary layer coating body is prepared from a polytetrafluoroethylene emulsion, bonding resin, wear-resistant resin, a pigment, a filler and an auxiliary agent; in the primary layer coating body, the non-uniform coefficient Cu of the particle size of the pigment and the filler is greater than 5; in the non-primary layer coating body,the particle size of the pigment and the filler adopts discontinuous grading, the non-uniform coefficient Cu is larger than 5, and the curvature coefficient Cc is equal to 1-3, wherein Cu accounts for d60 / d10, and Cc accounts for d30<2> / d60*d10; the particle size of the pigment and the filler in the primary layer coating body is smaller than the particle size of the pigment and the filler in thenon-primary layer coating body; and the filler is insoluble in the coating and can be uniformly dispersed. The wear-resistant non-stick coating has the advantages of being outstanding in non-viscosity, good in wear resistance, capable of effectively resisting scraping of a truner and long in service life.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a high wear-resistant and non-stick coating specially used for cookware and a preparation method thereof. Background technique [0002] In the non-stick cookware industry, the poor wear resistance of non-stick coatings seriously affects the performance and service life of cookware. Pure polytetrafluoroethylene (PTFE) has low strength, flexible and stretchable mechanical properties, so that when the coating encounters the impact of cooking with a spatula or cleaning and wiping with hard fiber cloth, it is very easy to produce irreversible and detectable wear, so that it does not stick. The pot loses its use value in a short period of time and is scrapped ahead of schedule. In order to improve the service life of the PTFE coating, organic resins are often used to modify it. For example, the patent CN101717601A discloses a non-stick coating made of polytetrafluoroethylene as a film-forming ...

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Problems solved by technology

[0002] In the non-stick cookware industry, the poor wear resistance of non-stick coatings seriously affects the performance and service life of cookware

Pure polytetrafluoroethylene (PTFE) has low strength, flexible and stretchable mechanical properties, so that when the coating encounters the impact of cooking with a spatula or cleaning and wiping with hard fiber cloth, it is very easy to produce irreversible and detectable wear, so that it does not stick. The pot loses its use value in a short period of time and is scrapped ahead of schedule

In order to improve the service life of the PTFE coating, organic resins are often used to modify it. For example, the patent CN101717601A discloses a non-stick coating made of polytetrafluoroethylene as a film-forming substance. It is mainly composed of polytetrafluoroethylene, solvent gasoline, Composed of alkyd resin, surfactant, and wear-resistant filler, but it can't get very good wear-resistant effect

The PTFE coating still has the disadvantages of poor wear resistance and easy scratches

Patent CN 102643582A discloses a non-stick coating containing main film-forming fluororesin, acrylic emulsion and water, with or without additives. Although its surface has no pinholes and no yellowing defects, it also has insufficient wear resistance The problem

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