Modified multiphase bitumen composition and floor covering
AssigneeInterface, Inc.
InventorAndrew Thompson
Life of this patent
Estimating the term…
Abstract
A floor covering having a bitumen composition as a backing layer, such as carpet tiles, which bitumen composition comprises straight run bitumen and a mixture of high density and low density polyethylene polymers blended and dispersed in the straight run bitumen as a continuous phase in an amount of up to about 12% by weight and which bitumen composition contains a minimum of about 40% by weight of a mineral filler material, such as limestone, and the bitumen composition having improved dimensional stability, adhesion, static loading and electrical conductivity and having lower cost and processing advantages.
Claims16
A multiphase modified bitumen composition, which composition comprises:
- a) a straight run bitumen;
- b) a polymer mixture, the polymer mixture consisting essentially of a major amount of a low density polyethylene polymer (LDPE) and a minor amount of a high density polyethylene polymer (HDPE);
- c) the straight run bitumen forming a dispersed phase in a continuous phase of the polymer mixture;
- and
- d) the polymer mixture employed in an amount of up to about 12 percent by weight of the bitumen composition.
Dependencies are inferred from the claim text.