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    • 6. 发明授权
    • Process for copolymerizing conjugated dienes with monovinyl aromatic monomers
    • 用单酚芳族单体共聚合的方法
    • US3726844A
    • 1973-04-10
    • US3726844D
    • 1970-11-20
    • FIRESTONE TIRE & RUBBER CO
    • HALASA A
    • C08F236/10C08F19/08
    • C08F236/10C08F4/461
    • A DIENE OF 4 TO 6 CARBON ATOMS AND STYRENE OR OTHER VINYL AROMATIC MONOMER, INCLUDING AKYLATED VINYL AROMATIC MONOMERS, ARE COPOLYMERIZED IN A HYDROCARBON SOLVENT USING A SUBSTANTIAL AMOUNT OF EACH MONOMER AND UTILIZING AS THE INITIATOR, AN ALKALI METAL HYDROCARBON (PREFERABLY N-BUTYLLITHIUM) COMPLEXED WITH ANOTHER ALKALI METAL. THE COMPLEX MAY BE FORMED BY COMPLEXING HYDROCARBON LITHIUM WITH A DIFFERENT ALKALI METAL. THE COMPLEXING METAL IS USED IN AN AMOUNT NO MORE THAN THE AMOUNT OF ALKALI METAL INITIALLY PRESENT IN THE INITIATOR. THUS, IF THE INITIATOR BE PREPARED FROM HYDROCARBON LITHIUM, THE RATIO OF (A) THE AMOUNT OF ALKALI METAL OTHER THAN LITHIUM IN THE COMPLEXED INTIATOR TO (B) THE AMOUNT OF LITHIUM IN THE COMPLEXED INITIATOR, MAY BE ONE PART OF THE OTHER ALKALI METAL TO 50 PARTS OFLITHIUM, AND PREFERABLY 5 TO 20 PARTS OF LITHIUM. THE RESULTING COPOLYMER IS A COPOLYMER OF SUBSTANTIALLY CONSTANT COMPOSITION (I.E. A COPOLYMER CONTAINING NO SUBSTANTIAL BLOCK OF VINYL MONOMER), AND IT HAS A LOW VINYL CONTENT. THE DIENE MAY BE BUTADIENE, ISOPRENE, PIPERYLENE OR 2,3-DIMETHYLBUTADIENE OR A MIXTURE THEREOF. THE VINYL AROMATIC MONOMER MAY BE STYRENE OR AN ALKYLATED STYRENE OR VINYL NAPHTHYLENE OR ALKYLATED VINYL NAPHTHYLENE OR A MIXTURE THEREOF.
    • 8. 发明申请
    • STAR POLYMERS FROM MIXED INITIATORS
    • 混合发动机的STAR聚合物
    • WO1997005179A1
    • 1997-02-13
    • PCT/US1996012380
    • 1996-07-29
    • FMC CORPORATION
    • FMC CORPORATIONQUIRK, Roderic, P.
    • C08F36/04
    • C08G83/00C08C19/44C08F4/461C08F4/72C08F12/06C08F36/04C08F297/044C08G81/022
    • The present invention provides novel, multi-arm or star-shaped polymers having mixed protected functional and non-functional ends, their optionally hydrogenated analogues, and the polymers produced by removal of the protecting groups. The invention also provides a process for the preparation of novel multi-arm or star-shaped polymers having branched-end functionality on some, but not all, of the branches. The multi-arm or star polymers of this invention are produced from more than one type of initiator, i.e., from both functional and non-functional initiators which, by design, incorporates both desired physical properties associated with multi-arm or star polymers with non-functional branch-ends and the versatility of functional branch end multi-arm or star polymers.
    • 本发明提供具有混合保护的官能和非官能末端的新型多臂或星形聚合物,它们任选氢化的类似物,以及通过除去保护基产生的聚合物。 本发明还提供了一种制备新颖的多臂或星形聚合物的方法,其在一些但不是全部的分支上具有支链官能团。 本发明的多臂或星形聚合物由多于一种类型的引发剂生产,即从功能性和非功能性引发剂两者产生,其通过设计将包含与多臂或星形聚合物相关的所需物理性能与非 - 功能分支端和功能性分支端多臂或星形聚合物的多功能性。