Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1989-10-16
1991-07-30
Lieberman, Allan M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 68, C08J 322, C08J 9500
Patent
active
050361198
ABSTRACT:
A process is provided to prepare a composition of bitumen, carbon black, and a block copolymer, the block copolymer being a hydrogenated or unhydrogenated block copolymer comprising, before hydrogenation, at least two blocks which comprise predominantly polymerized monoalkenyl arenes and at least one block which comprises predominantly polymerized conjugated diolefins. The process involves blending of the carbon black with the block copolymer and then combining the carbon black-block copolymer mixture with bitumen. The product of the process of this invention has excellent storage stability and aged tensile strength properties, and has superior weatherability.
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Lieberman Allan M.
Shell Oil Company
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