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    • 10. 发明公开
    • GELS MADE FROM TRIBLOCK COPOLYMERS
    • 由三嵌段共聚物制成的凝胶
    • EP0832158A1
    • 1998-04-01
    • EP96917577.0
    • 1996-06-10
    • RAYCHEM LIMITED
    • GRAULUS, HendrikOVERBERGH, NoelHUDSON, JohnHAMMOND, Philip, JamesYu, JianmingPERKINS, Anthony
    • C08F220C08L53
    • C08F220/18C08L53/00
    • Gels of oil-extended methacrylate-alkylene-methacrylate (M-A-M) triblock copolymers having higher glass transition temperatures than known styrene-alkylene-styrene triblock gels. The preferred M-A-M triblocks for making the new gels have polymethylmethacrylate end blocks and butadiene or ethylene/butylene mid-block, and are synthesised by methods in the public domain (inter alia Shell EP-A-0431706). Includes gels of new triblocks having end blocks of higher alkyl (e.g. isobornyl) methacrylate homopolymer or copolymers. Mixed methyl- and higher alkyl- methacrylate end blocks are preferred to reduce gel-formation problems which may arise from solubility parameter of homo-isobornylmethacrylate end blocks being too close to that of extender oil. Includes gels of new multi- (preferably penta-) block copolymers including styrene (S) blocks, e.g. M-S-A-S-M.
    • 具有比已知苯乙烯 - 亚烷基 - 苯乙烯三嵌段凝胶更高的玻璃化转变温度的充油甲基丙烯酸酯 - 亚烷基 - 甲基丙烯酸酯(M-A-M)三嵌段共聚物的凝胶。 用于制备新凝胶的优选M-A-M三嵌段具有聚甲基丙烯酸甲酯端嵌段和丁二烯或乙烯/丁烯中嵌段,并且通过公共领域的方法(特别是Shell EP-A-0431706)合成。 包括具有高端烷基(例如异冰片基)甲基丙烯酸酯均聚物或共聚物末端嵌段的新三嵌段的凝胶。 甲基丙烯酸甲酯和甲基丙烯酸高级烷基酯末端嵌段是优选的以减少凝胶形成问题,这可能由甲基丙烯酸异冰片酯端基嵌段的溶解度参数太接近填充油的溶解度参数引起。 包括新的多(优选五 - )嵌段共聚物的凝胶,包括苯乙烯(S)嵌段,例如苯乙烯 M-S-A-S-M。