US 12,258,461 B2
Bitumen product
Hartmut Kremer, Wernberg (AT)
Assigned to Omya International AG, Oftringen (CH)
Appl. No. 17/642,805
Filed by Omya International AG, Oftringen (CH)
PCT Filed Sep. 23, 2020, PCT No. PCT/EP2020/076523
§ 371(c)(1), (2) Date Mar. 14, 2022,
PCT Pub. No. WO2021/058535, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 19199058 (EP), filed on Sep. 23, 2019.
Prior Publication US 2022/0380569 A1, Dec. 1, 2022
Int. Cl. C08K 3/013 (2018.01); C08K 7/24 (2006.01)
CPC C08K 3/013 (2018.01) [C08K 7/24 (2013.01); C08K 2201/005 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A bitumen product comprising bitumen as well as a mineral filler, wherein the mineral filler comprises expanded perlite grains, which expanded perlite grains have a closed-cell surface, and expanded perlite grains, which expanded perlite grains have an open-cell surface,
wherein a proportion of expanded perlite grains having a closed-cell surface is greater in % by weight than a proportion of expanded perlite grains having an open-cell surface,
wherein the expanded perlite grains with closed-cell surface are unground,
wherein the expanded perlite grains with closed-cell surface have a bulk density of between 90 kg/m3 and 550 kg/m3,
wherein the expanded perlite grains with closed-cell surface have a particle size of between 5 μm and 2000 μm, and
wherein the expanded perlite grains with closed-cell surface are present in amounts of between 1 wt. % and 20 wt. %.