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US 8,956,708 B2Granted
Rotolined articles
AssigneeTotal Research & Technology Feluy
InventorEric Maziers
Life of this patent
Estimating the term…
Abstract
The present invention relates to the field of steel pipes and vessels rotolined with metallocene-produced polyethylene.
Claims12
A rotolined article comprising:
- an outer skin layer prepared from an iron containing alloy;
- an inner skin layer prepared from a polyethylene-based resin consisting of a metallocene-produced homopolymer of ethylene, a metallocene-produced copolymer of ethylene, or mixtures thereof, in amounts ranging from 70 to 99.5 wt % based on the total weight of the inner skin layer;
- a material selected from the group consisting of a functionalized polyolefin (FPO), an ionomer, a polyolefin (PO) grafted to a non-polyolefin (NPO) in the form of a block copolymer (PO)g-(NPO), and combinations thereof, in amounts ranging from 0.5to 30 wt % based on the total weight of the inner skin layer;
- and
- at least one additional layer prepared from materials selected from the group consisting of polyamide (PA), ethylene vinyl alcohol (EVOH), polypropylene (PP), polyethylene (PE), and combinations thereof, wherein the at least one additional layer:
- comprises a first additional layer that is positioned between the outer skin layer and the inner skin layer, wherein the first additional layer is applied directly to the outer skin layer and the inner skin layer.
3 more elements
Dependencies are inferred from the claim text.