Building external wall temperature-change-resistant anti-oxidative color coating

Abstract

The invention discloses a building external wall temperature-change-resistant anti-oxidative color coating, which is prepared from the following raw materials in parts by weight: 20 to 25 parts of carboxylic waterborne polyurethane, 19 to 24 parts of pure silicon resin emulsion, 11 to 16 parts of cobalt blue, 10 to 15 parts of mill base, 8 to 12 parts of bentonite, 7 to 11 parts of mica powder, 6 to 10 parts of kaolin, 5 to 9 parts of talcum powder, 12 to 14 parts of sodium carbonate, 9 to 11 parts of sodium tripolyphosphate, 10 to 12 parts of polyoxyethylene aliphatic ester, 8 to 10 parts of sodium polyacrylate, 13 to 16 parts of sheet zinc powder, 7 to 11 parts of aluminum hydroxide, 5 to 8 parts of silicon nitride, and 30 to 35 parts of deionized water. A preparation method comprises the following steps of S1, adding the carboxylic waterborne polyurethane, the pure siliconresin emulsion, the cobalt blue, the mill base and the deionized water into a stirrer, and stirring with the stirring speed of 30 to 40rpm for 20 to 30min at the temperature of 40 to 50 DEG C; S2, adding the sheet zinc powder, the aluminum hydroxide and the silicon nitride for stirring with the stirring speed of 100 to 150rpm for 5 to 10min. The building external wall temperature-change-resistant anti-oxidativecolor coating provided by the invention has excellent temperature alternating resistance and oxidation resistance, has high tensile strength and favorable flexibility, and is simple in preparation process, convenient to use, and low in cost.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a temperature-resistant and oxidation-resistant color coating for building exterior walls. Background technique [0002] The definition of paint refers to a fine chemical product that is coated on the surface of an object by a specific construction method and cured to form a beautiful and continuous protective film with a certain strength on the surface of the object, or to form a coating film with a certain special function. It can cover various defects on the coated surface to make it beautiful, that is, decorative; it can control moisture, isolate corrosive gases such as carbon dioxide, sulfur dioxide, and hydrogen chloride in the air, and prevent the climate from affecting the coated object and the metal substrate. Rust, that is, has a protective function; it can give various colors to the surface of the coated object, and has a symbolic effect. [0003] Most of the existin...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing coatings for building exterior walls do not have excellent temperature change resistance and oxidation resistance, and have limited application range, high cost, low yield, and serious environmental pollution. Therefore, we propose a building Temperature-resistant and anti-oxidation color coatings for exterior walls are used to solve the above problems