| type I |
cured by oxidative
cross-linking of unsaturated polyester groups
and solvent evaporation |
architectural floors and maintenance,
topcoats |
| type II |
contains free
isocyanates, reacts with moisture; various blocking
techniques to preserve isocyanate reactivity for extended shelf life |
leathers, concretes, maintenance |
| type
III |
one-part heat cure; uses blocked isocyanates that
are liberated
upon heating to react with isocyanate-reactive components in the formulation |
coils and electric wires |
| type IV |
two-part solvent-borne; one part is the prepolymer polyisocyanate,
and the second one contains all other components (polyol(s), catalyst,
solvents, pigments, and other additives); ambient or heat curing |
plastics, wood furniture, marine exteriors |
| type V |
two-part high solid (>50%) coatings;
one part is a prepolymer
and the second one is a polyol |
leathers, wood, automotive
clear coats, refinishes, aircraft,
bus, trucks, industrial structure maintenance coatings |
| type VI |
one-component nonreactive low solid
(<20%) solvent-borne;
high gloss film forms upon solvent evaporation |
textiles |
| powder coatings |
one-part reactive
system using caprolactam or 1,2,4 triazole
blocked aliphatic isocyanates |
automotive exterior panels
and parts, wires, electrical transmission
equipment, surfaces, metal surfaces, outdoor lawn furniture |
| radiation |
high solid coatings, rapid
cure, high gloss, not practical
for home use or complex shapes; made by reacting isocyanate-capped
prepolymer with hydroxyl functionalized acrylate or methacrylate |
manufactured wood flooring, cabinets, metal surfaces, plastics |
| waterborne |
broadly applied to one-
and two-part systems using aliphatic
or aromatic isocyanates; reduces VOC exposure, can be used in hybrid
technologies |
wood coatings, decorative coatings, artificial
leathers, textiles,
plastics, inks, architectural, automotive |
