| abstract |
The present invention relates to a multilayer structure comprising: n a tie layer based on a graft polymer resulting from the polymerization of at least one alkyl (meth)acrylate in the presence of a polyolefin and directly attached to the latter; and n a layer of a polymer chosen from polyolefins, acrylic polymers and fluoropolymers. n The polymerization of the alkyl (meth)acrylate in the presence of the polyolefin may be carried out in an extruder in which the polyolefin is in the melt. A radical initiator, such as a peroxide, is also added. n The thickness of this structure may be of the order of 100 μm up to several mm or cm. n The present invention also relates to a structure comprising, in this order: n a layer of a polymer chosen from polyolefins, acrylic polymers and fluoropolymers; n a layer of the aforementioned tie; and n a layer of a polymer chosen from polyolefins, acrylic polymers and fluoropolymers; n the layers adhering to one another. n Preferred structures are those in which the layers on each side of the tie are different. n The present invention also relates to a structure comprising, in this order: n a layer of a polymer chosen from polyolefins, acrylic polymers and fluoropolymers; n a layer of the aforementioned tie; n a layer of a polymer chosen from polyolefins, acrylic polymers and fluoropolymers; n a layer of the aforementioned tie; and n a layer of a polymer chosen from polyolefins, acrylic polymers and fluoropolymers; n the layers adhering to one another. n Preferred structures are those in which the central layer is different from the outermost layers, these outermost layers being able to be identical or different. n The present invention also relates to devices for transferring or storing fluids, and more particularly to pipes, tanks, ducts, bottles and containers formed from the above structures. |