Bitumen compositions and a process for their preparation

Details Bitumen compositions and a process for their preparation Bitumen compositions and a process for their preparation

1998-05-05

1999-08-17

Jagannathan, Vasu

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 64, 524 69, 524 59, C08L 9500, C08L 3100

Patent

active

059394749

ABSTRACT:
The invention provides a process for preparing a bitumen composition comprising blowing a mixture with an oxygen-containing gas which mixture comprises a bitumen having a penetration of at least 300 dmm (as measured by ASTM D 5 at 25.degree. C.), a thermoplastic rubber which is present in an amount of less than 10% w, and a bitumen blowing catalyst which is present in an amount in the range of from 1 to 3% w, both based on total mixture; and bitumen compositions obtainable by such process.

REFERENCES:
patent: 4425454 (1984-01-01), Goodrich
patent: 4454269 (1984-06-01), Goodrich
patent: 4882373 (1989-11-01), Moran
patent: 5284509 (1994-02-01), Kamel et al.
patent: 5342866 (1994-08-01), Trumbore et al.
patent: 5605946 (1997-02-01), Planche et al.
European Search Report Sep. 14, 1998.

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