Polymer resins
Polymer resins are synthetic resins that are mostly used as binders for paints. The group of polymer resins is divided into polyolefins , vinyl polymers and polyacrylates . These binders are, in each case still in admixture with pigments , fillers and additives , as a fine powder mixture ( powder coating ) or as an aqueous dispersion ( emulsion paint ) or in solvents dissolved ( solvent ink ) applied onto the to be painted material.
Manufacture and use
Like all polymers, polymer resins are created by linking monomers to form macromolecules. However, the molar masses are usually considerably higher than the condensation resins used in paints . This leads to increased use as solvent-free, aqueous emulsion paints or powder coatings.
Aqueous polymer resins are used in the production of emulsion paints, acrylic paints , primers , adhesives and fillers . Polymer resins based on polyacrylates, polyvinyl chloride and polyvinyl acetate are used for floor paints, facade matt paints and primers. Acrylic and methacrylic resins are used for deep primers. Due to their thread-like nature, they penetrate the subsoil perfectly.
Dissolved and undissolved polymer resins
When polymer resins are dissolved by unresolved differentiated polymer resins.
Polymer dispersions
Polymer resins dispersed in water consist of spherical particles that stick to the surface during the drying process ( cold flow ). Coarse dispersions (particle size around 1 µm, as usual in paints) penetrate porous substrates with difficulty. Particularly finely divided dispersions, the particle size of which is around 50 nm, are used primarily for deep grounds.
Dissolved resins
Dissolved polymer resins are divided into crosslinking and non-crosslinking types. Cross-linking types cure through chemical reaction under the influence of hardeners, heat or UV influence . They are mostly used in industry or car paint shops.
Non-networking types are often used in building painting. They dry out by evaporation of their solvent and diluent. Therefore, they can be brought back into solution by using the solvent again.
Individual evidence
- ↑ a b A. Goldschmidt, H.-J. Streitberger: BASF Handbook Painting Technology. 2002, Vincentz Network GmbH & Co KG, ISBN 3878703244 .