Aqueous emulsion type electromagnetic wave shielded coating and preparation process thereof

Abstract

The composition of water emulsion electromagnetic wave shielding paint is composed of (by weight portion) 20-60 portions of water soluble film-forming resin, 20-60 portions of conducting filler, 30-100 portions of pure clean water, 1-5 portions of thickening agent and 1-5 portions of film-forming adjuvant, and its preparation process includes the following steps: (1) drying conducting filler, controlling temp. at 50-80 deg.C until the conducting filler is become into powder; (2). mixing the dried conducting filler together with film-forming adjuvant, film-forming resin and pure clean water orclean running water and grinding by using grinding machine; and (3) adding thickening agent and regulating the paint to make it have a certain viscosity.

Description

1. Technical field

[0001] The invention belongs to the field of electromagnetic wave shielding paint, in particular to a water-based emulsion type electromagnetic wave shielding paint and a preparation method thereof. 2. Background technology

[0002] Traditional electromagnetic wave shielding coatings use organic solvents as diluents. The disadvantages are: 1. Harmful substances will be volatilized during preparation and use, which will pollute the environment and damage human health; 2. Increase the cost.

[0003] U.S. Patent Application No. 4556506, filed on December 3, 1985, discloses a water-based conductive composition prepared from bifunctional amphoteric particles, polyacrylamide, non-ionic surfactant, metal particles and water . The application documents of this patent only stated that the electromagnetic wave shielding performance of this water-based conductive composition is stable, and that the viscosity and dispersion have no obvious changes within two or three...