Star polymers of dienes, vinylarenes and alkyl methacrylates as

Details Star polymers of dienes, vinylarenes and alkyl methacrylates as Star polymers of dienes, vinylarenes and alkyl methacrylates as

1994-03-29

1996-03-05

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...

525250, 525271, 525302, 525308, 525309, 525310, C08F29702

Patent

active

054968984

ABSTRACT:
Star polymers having first polymeric arms comprising a hydrogenated conjugated diene and smaller second polymeric arms of a methacrylate resist coupling of methacrylate blocks attached to different cores and have improved performance as viscosity index improvers. The polymerized methacrylate units are converted to amide or imide groups by reaction with a primary or secondary amine to give the viscosity index improver dispersant properties.

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