ELASTOMERIC OIL BITUMEN MODIFIER AND ELASTOMER-BITUMEN BINDER BASED THEREON Russian patent published in 2019 - IPC C08L17/00 C08L95/00 C04B26/26 

FIELD: technological processes.

SUBSTANCE: group of inventions relates to elastomer modifiers of oil bitumen, obtained from rubber articles technical articles, which can be used for making elastomer-bitumen binder, and also relates to elastomer-bitumen binder made using said modifiers and intended for use, mainly in road and civil construction for asphalt concrete road surfaces, construction of aerodromes. Elastomeric oil bitumen modifier is a granular regenerate of crumbs of rubber articles, preferably, crumbs from amortized tires (tire regenerate), having following characteristics: content of gel-fraction 73–85 %, weight-average molecular weight of rubber in ash 87,500–131,600 conv. units, weight ratio of rubber is not less than 50 %. Granules with size of 0.5–1.0 mm are preferable. It is also possible to produce granules of said size and / or agglomerates thereof with maximum size of 10–12 mm. Elastomer-bitumen binder contains the claimed elastomeric modifier of oil bitumen and petroleum bitumen, at the following ratio of components, wt%: elastomeric modifier (preferably, tire regenerate) 5–25, petroleum bitumen – the rest – up to 100.

EFFECT: achieved technical result consists in improvement of complex of consumer properties of elastomer-bitumen binder, namely in increase of hardness, softening temperature, elasticity and reduction of brittleness temperature, and, accordingly, improvement of characteristics of asphalt concrete.

5 cl, 2 tbl