发明授权
US5399628A Block copolymers of monovinylarenes and conjugated dienes containing two
interior tapered blocks
失效
含有两个内锥形嵌段的单乙烯基芳烃和共轭二烯的嵌段共聚物
- 专利标题: Block copolymers of monovinylarenes and conjugated dienes containing two interior tapered blocks
- 专利标题(中): 含有两个内锥形嵌段的单乙烯基芳烃和共轭二烯的嵌段共聚物
-
申请号: US162735申请日: 1993-12-02
-
公开(公告)号: US5399628A公开(公告)日: 1995-03-21
- 发明人: George A. Moczygemba , Nancy R. Knight , William J. Trepka , Nathan E. Stacy
- 申请人: George A. Moczygemba , Nancy R. Knight , William J. Trepka , Nathan E. Stacy
- 申请人地址: OK Bartlesville
- 专利权人: Phillips Petroleum Company
- 当前专利权人: Phillips Petroleum Company
- 当前专利权人地址: OK Bartlesville
- 主分类号: C08F297/02
- IPC分类号: C08F297/02 ; C08F297/04
摘要:
A method for preparing tapered block copolymers in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomer in the presence of a randomizer; (2) an initiator and monovinylaromatic monomer; (3) a mixture of monovinylaromatic and conjugated diene monomers; (4) a mixture of monovinylaromatic and conjugated diene monomers; (5) conjugated diene monomer; and (6) a coupling agent; and the polymodal tapered block copolymers prepared thereby. The copolymers are particularly useful neat or in blends for applications such as packaging and food or drink containers which require transparency and good environmental stress crack resistance.
公开/授权文献
- US4919332A Riser or pop-up irrigation sprinkler 公开/授权日:1990-04-24
信息查询