Preparation of novel chemical milling protective coating

Abstract

The invention discloses a novel chemical milling protective coating, which is a single-component coating comprising a thermoplastic elastomer, a pigment, a filler, an aid, a solvent and the like. The coating can be dried at normal temperature and also can be dried at a low temperature; and a film is level and uniform, and has a certain adhesive force and better physical and mechanical properties. Meanwhile, the coating has high chemical corrosion resistance and peeling performance, is mainly used for chemical milling of an aluminum alloy, a titanium alloy, stainless steel and the like, processing of high-hardness metals, anodizing of the aluminum alloy, electroplating, etching processing temporary protection of artistic products with complex technology and the like, and also can be used for chemical corrosion-resistant shielded protection of coated object surfaces or used as temporary protection coatings for preventing scratches and bruises on surfaces of instruments and mechanical equipment.

Description

technical field [0001] The invention relates to a temporary protection mainly used for chemical milling of aluminum alloys, titanium alloys, stainless steel, etc., processing of high-hardness metals, anodization of aluminum alloys, electroplating, and engraving of artworks with complicated processes. It can be used as a masking protection against chemical corrosion on the surface to be coated, or as a temporary protective coating on the surface of instruments and mechanical equipment to prevent scratches and scratches. [0002] The paint can be dried at normal temperature or at low temperature; the paint film is flat and uniform, has certain adhesion and good physical and mechanical properties. At the same time, the coating has good chemical corrosion resistance and strippability. Background technique [0003] Chemical milling protective coating, also known as strippable coating, is a temporary protective coating in the process of chemical milling, which plays a temporary p...

AI Technical Summary

Problems solved by technology

[0008] The technical points of the present invention: mainly use the mixed thermoplastic elastomer as the matrix material, completely abandon the traditional rubber material, and at the same time improve the defects that the protective coating prepared by using SBS is not high in heat resistance and the coating is slightly faded after chemical milling; auxiliary The base resin, tung aldehyde resin, provides good resemblance and etching ratio of the coating film; methyl silicone oil provides good peelability of the coating film; plasticizer white oil provides good plasticity and thermal adhesion of the coating film; assists release of the film The agent fumed silica provides a certain peelability, strength, hardness and anti-settling effect of the coating film; the pigment and filler provide the coloring of the coating film, stress relief and guarantee the tensile strength, engraving, linearity of etching and trimming, etc.; The defoamer provides a good defoaming effect of the coating film and meets the performance index requirements; the solvent is a mixture of tetrachlorethylene, toluene and xylene, which meets certain solubility and dryness

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