Anti-ultraviolet organic-inorganic nano composite transparent coating and method for producing the same

Abstract

The invention belongs to the technical field of the coating composite, in particular to ultraviolet radiation-resistant organic-inorganic compound transparent coating and the preparative method thereof. The invention comprises the steps as follows: amphoteric ion multipolymer is adopted as the surface activator and the stabilizing agent to conduct surface modification for the organic nm grain; effective blending physical compounding of the inorganic nm grain and the polymer basal body is carried out for the aim of producing the organic-inorganic compound transparent coating. The invention overcomes the disadvantages of uneven reuniting and dispersion, weak heat stability and bad function durability of ultraviolet absorbent in the traditional blending fusion composite algorithm in the polymer, as well as rejects the shortcomings such as complicate preparative technique, high cost and so on of the prior chemical compounding method. The film made of the compound transparent coating has an ultraviolet screening factor of higher than 99.9 percent and the permeability of visible beam region of more than 90 percent. Moreover, the invention is applicable for the production of the ultraviolet radiation-resistant film and various anti-aging plastic products requiring high light permeability, and the fields of automobile, preservation of cultural relics and environment protection.

Description

An anti-ultraviolet organic-inorganic nanocomposite transparent coating and its preparation method technical field The invention belongs to the technical field of coating compositions, and in particular relates to an anti-ultraviolet organic-inorganic nanometer composite transparent coating and a preparation method thereof. Background technique Ultraviolet rays are electromagnetic waves ranging from 200 to 400 nanometers, which are divided into short waves (200 to 280nm), medium waves (280 to 320nm) and long waves (320 to 400nm). The shorter the wavelength of ultraviolet rays, the greater the damage to human skin. At the same time, the energy of ultraviolet rays is about 314-419KJ / mol, which is enough to destroy the chemical bonds of polymers, trigger auto-oxidation reactions, and cause aging and degradation of polymers such as plastics, rubber, and coating resins, resulting in huge losses every year. At present, polymers with anti-ultraviolet and anti-aging functions are...

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Problems solved by technology

The preparation process is simple and convenient, and the cost is low, but the invention still does not deviate from the traditional blending physical composite method, and the stability and anti-ultraviolet effect of the organic / inorganic nanocomposite coating still need to be further improved

Xu Hong and Cheng Cunkang et al. (authorized announcement number CN1224640C) used nano-titanium dioxide to prepare a nano-titanium dioxide / polyester composite material with anti-ultraviolet radiation in situ. The uniform dispersion of inorganic nanoparticles in the polymer matrix solves the problem of agglomeration of nano-titanium oxide particles in the matrix. The anti-ultraviolet organic / inorganic nanocomposite material prepared by the inventive method has excellent mechanical and thermal properties and anti-ultraviolet effect. However, the preparation process adopts a chemical preparation method, the process is complex and cumbersome, the cost is high, the lack of universality, and more importantly, the efficiency of organic / inorganic in-situ compounding is low

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