Patent ID: 9527970
Filing Date: 2016-12-27
CPC Classification: C08J,C08L,E04D

Claim Text:
1. A polymer-modified bitumen (PMB) compound for a bituminous covering layer of a roof sheet, comprising a distillation bitumen, wherein an additive which is in the form of a polymer and which modifies properties of the distillation bitumen is present, and wherein the bitumen compound modified by the additive has properties in respect of a softening point and penetration, wherein the additive comprises polyethylene present as a polyethylene wax, wherein the polyethylene wax is in an amount ranging from 2.5 wt.-% to 5.0 wt.-%; a softening point of the bitumen compound is between 70° C. and 80° C.; and a penetration value of the bitumen compound is between 30 and 40 1/10 mm.