Bitumen and halogenated vinyl aromatic-conjugated diolefin block

Details Bitumen and halogenated vinyl aromatic-conjugated diolefin block Bitumen and halogenated vinyl aromatic-conjugated diolefin block

1992-05-14

1993-09-21

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

1062731, 1062842, 106285, 10628735, 524 71, 525 545, 525314, C08L 9500

Patent

active

052469875

ABSTRACT:
A bitumen composition is provided which contains a block copolymer of one or more halogenated vinyl aromatic blocks and one or more conjugated diolefin blocks. The composition does not phase separate upon storage for five days at 160.degree. C. and has excellent ductility and elasticity. The utilization of halogenated block copolymers also results in improved high service temperature viscosity and moduli with excellent resistance to thermal cracking at low service temperatures. The block copolymer is preferably a hydrogenated block copolymer. The bitumen is preferably halogenated.

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Engel et al., "Synthesis and Thermal Stability of Bitum-Polymer Ionomers", Journal of Appl. Poly. Science, vol. 43, pp. 227-236, (1991).
Boucher et al., "Elimination Chemistry in Asphalt", Research Report for SHRP, Southwestern Laboratories, Nov. 1989.

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