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A binder or film-forming agent is the most important component of a paintwork. It is this coating that, after the applied layer dries, creates a coating firmly adhered to the substrate
on the surface to be painted, which has certain mechanical and physicochemical properties. The curing rate, strength and durability of the formed film largely depend on the properties
of the binder itself.
BINDERS FOR PAINTS AND VARNISHES
A binder or film-forming agent is the most important component of a paintwork. It is this coating that, after the applied layer dries, creates a coating firmly adhered to the substrate
on the surface to be painted, which has certain mechanical and physicochemical properties. The curing rate, strength and durability of the formed film largely depend on the properties
of the binder itself.
Binders for waterborne coatings
Binders for solventborne coatings
Raw materials for powder paints
Thermoplastic binders
A paint is formulated as a mixture of four ingredients:
Binder
Solvent
Pigment
Additives
Binders of paints
Binder is the main ingredient of paints. Binders are polymers (resins) forming a continuous film on the substrate surface.
Binders are responsible for good adhesion of the coating to the substrate. The binder holds the pigment particles distributed throughout the coating. The binder is dispersed in a carrier (water or organic solvent either in molecular form (true solutions) or as colloidal dispersions (emulsions or sols).
Common binders by ATAMAN are as follows:
Alkyd resins are prepared by the condensation polymerization in the reaction of fatty acid and polyols (commonly glycerol) with polybasic acids.
Acrylic resins are prepared by polymerization of acrylic or methacrylic esters.
Latex (PVA) is a vinyl polymer prepared by free radical vinyl polymerization of the monomer vinyl acetate.
Phenolic resins are thermosetting polymers prepared by the reaction of simple phenol with aldehydes (eg. formaldehyde).
Urethane resins (polyurethanes) are prepared by the step-growth polymerization of isocyanates reacting with monomer molecules containing hydroxyl (alcohol) groups.
Epoxy resins is a thermosetting polymer formed as a result of cross-linking a resin containing short molecules in the presence of a hardener.
Chlorinated rubber is prepared through polymerization of the degraded natural rubber (in the presence of atoms of chlorine participating in cross-linking.
