Asymmetric radial polymers with acrylic monomer arms

Abstract

The invention described herein is an asymmetric radial block copolymer having at least one set of arms formed of at least one polymer block of at least one vinyl aromatic hydrocarbon and/or at least one polymer block formed of at least one conjugated diene and at least one set of arms formed of at least one polymer block of at least one acrylic monomer.

We claim: 
     
       1. An asymmetric radial block copolymer having at least one set of arms formed of at least one polymer block of at least one vinyl aromatic hydrocarbon and/or at least one polymer block formed of at least one conjugated diene and at least one set of arms formed of at least one polymer block of at least one acrylic monomer. 
     
     
       2. The copolymer of claim 1 wherein one set of polymer arms is comprised of a block copolymer of styrene and isoprene and/or butadiene and another set of polymer arms is comprised of an acrylic monomer. 
     
     
       3. The copolymer of claim 2 wherein the acrylic monomer is an alkyl methacrylate. 
     
     
       4. The copolymer of claim 3 wherein the acrylic monomer is tertiary butyl methacrylate. 
     
     
       5. The copolymer of claim 1 wherein one set of polymer arms is comprised of a block copolymer of a monomer selected from the group consisting of styrene, isoprene, and butadiene and another set of polymer arms is comprised of an acrylic monomer. 
     
     
       6. The copolymer of claim 5 wherein the acrylic monomer is an alkyl methacrylate. 
     
     
       7. The copolymer of claim 6 wherein the acrylic monomer is tertiary butyl methacrylate.