Composite article

A method of forming a composite article having increased peel strength, said method comprising the steps of:

• A. providing a first layer of the composite article comprising a low surface energy polymer;
• B. providing at least one (meth)acrylate and an organoborane initiator;
• C. providing an epoxide composition;
• D. providing a polyurethane composition;
• E. disposing the at least one (meth)acrylate and the organoborane initiator on the first layer;
• F. polymerizing the at least one (meth)acrylate in the presence of the organoborane initiator to form a poly(meth)acrylate layer that comprises a poly(meth)acrylate and that is disposed on and in direct contact with the first layer;
• G. disposing the epoxide composition on the poly(meth)acrylate layer;
• H. curing the epoxide composition to form an epoxide layer that comprises an epoxide and that is disposed on and in direct contact with the poly(meth)acrylate layer;
• I. disposing the polyurethane composition on the epoxide layer;
• and
• J. curing the polyurethane composition to form a polyurethane elastomer layer that comprises a polyurethane elastomer and that is disposed on an in direct contact with the epoxide layer,
• wherein the composite article has a 90° peel strength of at least 50 pli measured using ASTM D6862.

A subsea structure comprising:

• A. a pipe having a length;
• B. a first layer disposed on said pipe and comprising a low surface energy polymer;
• C. a multilayer coating disposed on and in direct contact with said first layer, wherein said multilayer coating comprises;
• (1) a poly(meth)acrylate layer disposed on and in direct contact with said first layer, wherein said poly(meth)acrylate layer comprises a poly(meth)acrylate comprising the reaction product of at least one (meth)acrylate polymerized in the presence of an organoborane initiator;
• (2) an epoxide layer disposed on and in direct contact with said poly(meth)acrylate layer, wherein said epoxide layer comprises an epoxide;
• and
• (3) a polyurethane elastomer layer disposed on and in direct contact with said epoxide layer, wherein said polyurethane elastomer layer comprises a polyurethane elastomer,
• wherein said multilayer coating has a 90° peel strength of at least 50 pli measured using ASTM D6862.