Patent ID: 8142871
Filing Date: 2012-03-27
Classification: C08L,C09D,Y10T

Abstract:
1. A pipe comprising an inner surface, an outer surface layer (A) and a coating layer (B) covering said outer surface layer (A); wherein the coating layer (B) comprises a coating composition (B-2) comprising a multimodal ethylene copolymer (B-1), being a copolymer of ethylene and one or more alpha-olefin comonomers having from 6 to 10 carbon atoms; wherein the multimodal ethylene copolymer (B-1) has a weight average molecular weight of from 70000 g/mol to 250000 g/mol and a melt index MFR wherein the coating composition (B-2) comprises from 80-100% by weight, based on the total weight of the coating composition (B-2), of the multimodal ethylene copolymer (B-1); wherein the coating composition (B-2) has a stress cracking resistance, as measured by CTL (Constant Tensile Load) at 60° C. and 5 MPa, of at least 10 h; wherein the coating composition (B-2) has Shore hardness according to ISO 868-2003 of at least 59; and, wherein the coating composition (B-2) has a tensile modulus determined according to ISO 572-2 of at least 800 MPa.