公开(公告)号：US20240002625A1

公开(公告)日：2024-01-04

申请号：US18253635

申请日：2021-11-18

Applicant: CSIR

Inventor： George Akim Jasper MTURI

IPC: C08J11/06 ,  C08L95/00

CPC classification number: C08J11/06 ,  C08L95/00 ,  C08L2555/34 ,  C08L2555/40 ,  C08J2495/00

Abstract: A method of re-stiffening an over-digested rubber modified bituminous binder includes admixing a reactive, stiffness inducing organic additive with the over-digested rubber modified bituminous binder to produce a re-stiffened rubber modified bituminous binder with an increased softening point. The admixing takes place at an elevated temperature of at least 185° C. A rubber modified bituminous binder suitable for both asphalt and seal surfacing applications that includes a digested rubber bituminous admixture with a softening point of at least 55° C. and a dynamic viscosity at 190° C. of less than 2000 mPa·s. A method of sealing or paving a surface includes applying a layer which includes a rubber modified bituminous binder to the surface, the rubber modified bituminous binder being in the form of a digested rubber bitumen admixture with a softening point of at least 55° C. and a dynamic viscosity at 190° C. of less than 2000 mPa·s.