Patent ID: 11926738
Assignee: GARLAND INDUSTRIES, INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  E  Y | IPC C  E

Claim 36:
37. A method for forming a roof membrane on a roof, said method comprises:
a. providing an actively modified polymer-modified bitumen material, said bitumen material comprising 25-75 wt. % of a first component comprising bitumen, coal tar, or combinations thereof, 1-49% wt. % of a second component comprising polyisocyanate compound and polyol; and wherein a content of said polyol in said bitumen material in said second component creates a NCO/OH equivalent ratio of 2:1 to 15:1; and,
b. applying said bitumen material to said roof to form a weather-resistant and waterproof membrane on said roof.