Marine and offshore coating systems

For Marine and off-shore use, an acrylicArinyl blend is often favoured. These coatings have lower solids content, but are less prone to plasticiser migration which can occur with the previous formulation in tropical climates. 

This formulation does not use extenders and with a PVC/CPVC (L) value of 0.33 the coating will be glossy in appearance ( 75% / 60°) 

A blend of polar and aromatic solvents is used to dissolve the thermoplastic vinyl resin and to promote compatibility between acrylic and vinyl during film formation. 

Vinyl Resin VAGH (polyvinyl chloride/polyvinyl acetate copolymer) may be used for a topcoat formulation which is applied over acrylic/vinyl intermediate coats. The carboxyl function VMCH resin is used to promote better adhesion to metal substrates. 

This formulation would be used as the topcoat over high build intermediate coats which would use similar resins and solvents, but a pigment package somewhat similar to that shown in the earlier example. 

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