US 11,926,738 B2
Active polymer modification of bitumen for use in roofing materials
Jason D. Smith, Strongsville, OH (US); Joseph W. Mellott, II, Stow, OH (US); Melissa Rus, Cleveland, OH (US); David Sokol, Vermillion Township, OH (US); and Julia Holland, Cleveland, OH (US)
Assigned to Garland Industries, Inc., Independence, OH (US)
Filed by Garland Industries, Inc., Cleveland, OH (US)
Filed on Sep. 18, 2020, as Appl. No. 17/024,935.
Application 17/024,935 is a division of application No. 14/624,672, filed on Feb. 18, 2015, granted, now 10,907,045.
Claims priority of provisional application 61/944,687, filed on Feb. 26, 2014.
Prior Publication US 2021/0002485 A1, Jan. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 95/00 (2006.01); C08G 18/44 (2006.01); C08G 18/69 (2006.01); E04D 5/10 (2006.01)
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
OG exemplary drawing
 
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.