CPC C08L 95/00 (2013.01) [C08G 18/44 (2013.01); C08G 18/69 (2013.01); E04D 5/10 (2013.01); C08L 2205/03 (2013.01); C08L 2555/50 (2013.01); C08L 2555/74 (2013.01); C08L 2555/84 (2013.01)] | 38 Claims |
1. A method for forming an actively modified polymer-modified bitumen material, said method comprises:
providing 25-75 wt. % of a first component comprising bitumen, coal tar, or combinations thereof;
providing 1-49% wt. % of a second component comprising polyisocyanate compound and polyol; and,
adding said second component to said first component to form a mixture and to allow said second component to react with hydroxyl functional groups of said first component to form said bitumen material; and
wherein a content of said polyol in said second component creating a NCO/OH equivalent ratio of 2:1 to 15:1.
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