Tapered block copolymers of conjugated dienes and monovinylarenes.
摘要
<p>A method for preparing tapered block copolymers in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and a mixture of monovinylaromatic and conjugated diene monomers; (3) an initiator and a mixture of monovinylaromatic and conjugated diene monomers; and (4) a coupling agent to produce a polymodal tapered block copolymer. The copolymers are particularly useful for packaging applications which require good environmental stress crack resistance.</p>
申请公布号
EP0512530(A1)
申请公布日期
1992.11.11
申请号
EP19920107687
申请日期
1992.05.07
申请人
PHILLIPS PETROLEUM COMPANY
发明人
TREPKA, WILLIAM JAMES;MOCZYGEMBA, GEORGE ANTHONY;FARRAR, RALPH COLEMAN, JR.