Patent ID: 8524341
Filing Date: 2013-09-03
Classification: C08L,Y10T

Abstract:
1. A multilayer structure for fluid transport and/or storage comprising as the inner layer, or outer layer a blend of: a) 60-90 percent by weight of one or more polyamides as the continuous phase; b) 10 to 30 percent by weight of one or more unmodified high density polyethylene (HDPE) having a flexural modulus of from 700 Mpas to 1600 Mpas; c) 8-20 percent by weight of one or more modified polyolefins in the disperse phase having two distinct domains, one having a flexural modulus of less than or equal to 100 Mpa (soft) and/or is an elastomer, the other having a flexural modulus of 200 Mpa to 400 Mpa (medium) and a density of 0.915 to 0.925, wherein said medium and soft domains of said modified polyolefin are present on the same modified polyolefin; d) 4-10 percent by weight of one or more plasticizers chosen from benzene sulfonamide derivatives; and e) 0.8-1.5 percent by weight of one or more stabilization compounds, wherein the structure is, in said polyamide continuous phase, a hard HDPE core and satellites at the periphery made of the modified polyolefin having medium and soft domains that are discontinuous; and the inner or outer layer not comprised of said blend comprising PA 11 or PA 12.