Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-09-27
1993-11-30
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525901, C08F29704
Patent
active
052666484
ABSTRACT:
A symmetric star block copolymer having and exhibiting one phase melt behavior comprising from about 3 to 30 arms, wherein each of said arm has a molecular weight of from about 20,000 to 35,000; said arms coupled with a suitable coupling agent; and wherein said arms comprises monomers of monoalkenyl aromatic hydrocarbon and conjugated diolefins; and wherein said monoalkenyl aromatic hydrocarbon is present in an amount of from about 20 to 40 wt % of the star block copolymer. Also disclosed is a process for preparing these one phase melt block copolymers.
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Cain Edward
Michl Paul R.
Okorafor James O.
Shell Oil Company
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