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Saturday, October 8, 2011

Polybutenes as Oil Thickener

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Brightstock is a traditional viscosity thickener for low viscosity oils.  But using a synthetic alternatives like polybutenes can also be employed.

Advantages of polybutenes.

  • Can raise the viscosity index of oil giving superior lubrication properties and easy cold starting.
  • Excellent shear stability that retains the viscosity of blended oil longer under service condition
  • With anti-throw or tackiness properties.

One example of polybutene is “Hyvis.”

Blending S.A.E. 30 and 40  using Hyvis 600 and Solvent 150 Neutral Oil as compared with Brightstock and SN 150.


S.A.E. 30
S.A.E. 40
(wt/ %)
(wt/ %)
Hyvis 600
9.0

12.5

Brightstock

47.5

60
SN 150
91.0
52.5
87.5
40

100%
100%
100%
100%
Viscosity @ 100oC
11.7
11.3
15.7
14.2
Viscosity @ 100oC
83.7
98.3
121
140
Viscosity Index VI
132
101
137
98
Pour Point (Upper) oC
-15
-9
-15
-9

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