Multilayer plastic pipe having good adhesion between layers
AssigneeDegussa-Huels Aktiengesellschaft
InventorsStefan Roeber, Hans-Dieter Herrmann
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Abstract
A plastic pipe based on polyolefins is provided, which pipe, compared with single-layer pipes of polyolefins, has improved barrier action against (petro)chemical materials, in particular against methanol-containing fuels. This is achieved by a multilayer plastic pipe which comprises the following layers: I. at least one layer based on a polyolefin, II. at least one layer based on a thermoplastic polyester, bonded via III. a layer between them of a suitable coupling agent which contains reactive groups, with adjacent layers being cohesively bonded to one another. The invention makes it possible to obtain plastic pipes having the desired improved property profile.
Claims15
A multilayer plastic pipe comprising the following layers:
- I. at least one layer comprising a polyolefin,
- II. at least one layer comprising a thermoplastic polyester containing at least one compound having two or more epoxy groups, having two or more oxazoline groups, having two or more isocyanate groups, and combinations thereof, and
- III. at least one layer lying between layers I and II and comprising a coupling agent containing reactive groups, wherein adjacent layers are cohesively bonded to one another.
Dependencies are inferred from the claim text.