Process for the preparation of a block copolymer blend
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United States of America Patent
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Apr 11, 1995
Grant Date -
N/A
app pub date -
Mar 9, 1994
filing date -
Mar 30, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A process is provided for preparing block copolymer blend compositions, which process comprises the subsequent steps of polymerizing vinyl aromatic monomer, adding conjugated diene monomer to the polymerization mixture, adding more initiator, adding of a second portion of conjugated diene monomer, adding a second portion of vinyl aromatic monomer, and adding a terminating agent. A block copolymer composition is provided having a blend of a triblock copolymer A-B-B'-A' and a diblock copolymer B'-A'.
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