Viscosity index improver and composition containing same
Patent
·
OSTI ID:6961982
This patent describes a polymeric blend. It comprises a selectively hydrogenated asymmetric radial polymer having at least one polymeric arm containing one or more hydrogenated conjugated dioelfin monomer units and at least one arm which is a selectively hydrogenated diblock copolymer having a single polymeric block containing monoalkenyl aromatic hydrocarbon monomer units and a single polymeric block containing hydrogenated linear diblock copolymer having a single polymeric block containing predominantly monoalkenyl hydrocarbon monomer units and a single polymeric block containing hydrogenated conjugated dioelfin monomer units.
- Assignee:
- Shell Oil Co., Houston, TX
- Patent Number(s):
- A; US 4877836
- Application Number:
- PPN: US 7-198542A
- OSTI ID:
- 6961982
- Country of Publication:
- United States
- Language:
- English
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