Coated pipe and propylene polymer composition therefor
AssigneeBorealis Technology Oy
InventorsLeif Leiden, Jouni Purmonen, Kauno Alastalo
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Abstract
The invention relates to a coated pipe comprising a core, an adhesion layer coated on the core and an outer coating layer coated on the adhesion layer, wherein at least the adhesion layer comprises a propylene polymer composition comprising: (A) a propylene homo- or copolymer, and (B) an elastomeric component and to the use of such a propylene polymer composition for coating a pipe.
Claims13
A coated pipe comprising a core, an adhesion layer, and an outer coating layer, wherein the adhesion layer is intermediate the core and the outer coating layer, wherein the adhesion layer and the outer coating layer comprise a propylene polymer composition comprising:
- (A) a propylene copolymer, and
- (B) an elastomeric component;
- wherein the elastomeric component is an elastomeric ethylene copolymer;
- wherein the coated pipe has an impact resistance at −20° C. of 15 to 40 J/mm according to EN 1411;
- and
- wherein the propylene copolymer (A) comprises an ethylene content of about 8% in the outer coating layer and about 11% in the adhesion layer.
A method of manufacturing a coated pipe comprising a core, an adhesion layer and an outer coating layer, wherein the adhesion layer is intermediate the core and the outer coating layer, wherein the adhesion layer and the outer coating layer comprise a propylene polymer composition comprising:
- (A) a propylene copolymer, and
- (B) an elastomeric component
- wherein the elastomeric component is an elastomeric ethylene copolymer;
- wherein the coated pipe has an impact resistance at −20° C. of 15 to 40 J/mm according to EN 1411;
- and
- wherein the propylene copolymer (A) comprises an ethylene content of about 8% in the outer coating later and about 11% in the adhesion layer.
Dependencies are inferred from the claim text.