Iron oxide red aqueous color paste for wood coating and preparation thereof

Abstract

The invention relates to an iron oxide red aqueous color paste for wood coating, which comprises the following components in percentage by weight: 50-70% of iron oxide red pigment, 0.5-2.0% of surface modifier, 2.0-8.0% of wetting dispersant, 0.5-2.0% of defoamer, 0.05-0.2% of thickening agent, 0.5-2.0% of thixotropic agent, 0.1-0.5% of preservative and 20-40% of water. The color paste solid content is more than or equal to 60%, and fineness is less than 20 meshes; the color paste has strong tinting strength, stable color strength, high thixotropy and big viscosity during standby; viscosity is lowered when cutting; the color paste can be stably stored and does not have the defects of water distribution, clotting and the like; the color paste does not contain resin, can be compatible with various polymer emulsions and avoids the phenomena of flooding and floating of coating; the color paste takes water as dispersion medium and protects environment. The preparation method is as follows:firstly, preparing the surface-modified iron oxide red pigment powder, then preparing color paste predisperse body by the iron oxide red pigment powder, water and other assistants, and finally grinding to obtain the iron oxide red aqueous color paste. The color paste is used for mixing scarlet and light red aqueous wood true color coating and can be mixed with aqueous yellow color paste and aqueous blue color paste to prepare aqueous wood true color coatings with other colors.

Description

technical field [0001] The invention relates to a water-based color paste, in particular to an iron oxide red water-based color paste used for preparing wood solid-color paints and a preparation method thereof. Background technique [0002] A development trend in the coatings industry is that solid-color coatings use a new process of colorant toning to replace the traditional process of directly mixing and grinding pigments. At present, not only solvent-based paints are widely used for color matching of solvent-based colorants, but also water-based architectural coatings have also been widely used for color matching of water-based colorants. With the advancement of water-based coating technology, water-based wood coatings have begun to be applied, which puts forward new requirements for water-based colorants. Compared with architectural coatings, wood coatings not only have higher requirements on hardness, fineness, film-forming properties, adhesion, tinting strength, hidin...

AI Technical Summary

Problems solved by technology

[0004] The main problem of the existing iron oxide red water-based color paste is that the storage stability is relatively poor, and water separation, precipitation and agglomeration may occur in a short period of time; power loss etc.

The main reason is that the density of iron oxide red pigment is relatively high, and it is easy to sink under the action of gravity; the second is that the dispersion stability is not good, and the pigment particles are agglomerated

In the final analysis, the selection and ratio of raw materials for iron oxide red water-based color paste are not reasonable, and the preparation process also has deficiencies.

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