Architectural coatings Requirements for base materials and types of base materials

What are the requirements for the base material of architectural coatings?

 Substances used as base materials for architectural coatings should generally have the following requirements.

Can form film at room temperature

Because architectural coatings are directly painted on the interior, exterior walls, roofs, floors and other different parts of buildings, usually on-site construction, it is impossible to bake buildings, so it is required that the base material can be dried and hardened at room temperature or Room temperature cross-linking curing.

Has good water resistance

Architectural coatings are applied to the surface of buildings, especially the coatings on the outer walls are often washed by rain or other water, and the inner walls also have the problem of coating stains that need to be scrubbed, so the base material is required to have a strong after-drying and hardening. Good water resistance.

Has good alkali resistance

Architectural coatings are mainly painted on the surface of cement concrete or cement mortar. The surface of these substrates is alkaline, so the base material is required to have good alkali resistance.

Has good weather resistance

It is mainly used as a base material for exterior wall coatings. Since the coating formed by exterior wall architectural coatings is exposed to the atmosphere, it will be eroded by sunlight, dihydrate and other harmful substances in the atmosphere. In order to maintain a certain durability of the coating, the main film-forming substances are required to have good weather resistance. .

In addition, wide sources of materials, abundant resources, and moderate prices are also necessary conditions.

What are the types of base materials for architectural coatings?

The base materials used in architectural coatings are of the following types:

organic

(1) Water-soluble resins such as polyvinyl alcohol and polyvinyl formal.

(2) Polymer emulsion acrylic emulsion, styrene-acrylic emulsion, ethylene-propylene emulsion, chlorine partial emulsion, vinyl acetate emulsion, ethylene-vinyl acetate emulsion, etc.

(3) Solvent-based polymer acrylic resin, acrylic polyurethane resin, gasified rubber, epoxy resin, perchlorethylene, nitrocellulose, etc.

Inorganic silicates

(1) Water glass Potassium water glass, sodium water glass. (2) Silica sol

Inorganic-Organic Composite

Silica sol-styrene-acrylic emulsion, silica sol-acetate emulsion, silica sol-vinyl acetate, emulsion, polyvinyl alcohol-water glass, etc.