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US 12,486,402 B2Granted
Polymer-modified bitumen, method of production and use thereof for asphalt
AssigneeLANXESS Deutchland GmbH
InventorsThomas Klein, Thomas Rossrucker, Sandra Horstmann
Life of this patent
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Abstract
The present invention relates to polymer-modified bitumen, to a process for production thereof and to the use thereof for asphalt.
Claims13
Polymer-modified bitumen obtained by one or more styrene-butadiene copolymers, optionally dissolved in oil, are admixed with the bitumen at temperatures of at least 150° C. and subsequently the dialkyl polysulfides of formula (I)
- R1—S(x)—R2 (I),
- in which R1 and R2 are identical or different and represent a linear or branched C8-alkyl radical and x represents 5, are admixed.
Dependencies are inferred from the claim text.