Abstract: A method for producing a flexible tubular member having a cross-linked coating includes oxidizing an outer surface of a flexible tubular substrate, disposing a first radiation curable pre-polymer formulation on the oxidized outer surface, exposing the first radiation curable pre-polymer formulation to radiation to produce a first cross-linked coating layer, disposing a second radiation curable pre-polymer formulation on the first cross-linked coating layer, and exposing the second radiation curable pre-polymer formulation to radiation to produce a second cross-linked coating layer. The substrate includes a cross-linked polymer.

Abstract: A flexible tubular member includes a flexible tubular polymeric substrate, and a coating disposed on an outer surface of the tubular substrate. The coating includes a base layer disposed on an outer surface of the tubular substrate, and a topcoat layer disposed over the base layer. The base layer includes a radiation cured cross-linked acrylate polymer. The topcoat layer includes a radiation cured cross-linked polymer.

Abstract: A flexible tubular member includes a flexible tubular polymeric substrate, and a coating disposed on an outer surface of the tubular substrate. The coating includes a base layer disposed on an outer surface of the tubular substrate, and a topcoat layer disposed over the base layer. The base layer includes a radiation cured cross-linked acrylate polymer. The topcoat layer includes a radiation cured cross-linked polymer.

Abstract: A method for producing a flexible tubular member having a cross-linked coating includes oxidizing an outer surface of a flexible tubular substrate, disposing a first radiation curable pre-polymer formulation on the oxidized outer surface, exposing the first radiation curable pre-polymer formulation to radiation to produce a first cross-linked coating layer, disposing a second radiation curable pre-polymer formulation on the first cross-linked coating layer, and exposing the second radiation curable pre-polymer formulation to radiation to produce a second cross-linked coating layer. The substrate includes a cross-linked polymer.

Abstract: Compositions and methods for producing multi-layered plastic pipes are described. Some embodiments of the compositions comprise a cross-linkable polymer system (for example, based on either acrylate or epoxy chemistry), a photoinitiator, and one or more additives such as a pigment, an antioxidant, a light stabilizer, or other additive. In an exemplary method of producing a multi-layered plastic pipe, a base pipe, for example comprising cross-linked polyethylene, is conveyed through an oxidizing step in which at least the outer surface of the base pipe is oxidized, through a coating step in which a pre-polymer system is applied to the outer surface of the base pipe and through a curing step in which the pre-polymer is cured to form a layer of the pipe.