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    18.
    发明专利
    未知

    公开(公告)号：BR9910824A

    公开(公告)日：2001-01-30

    申请号：BR9910824

    申请日：1999-11-26

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG ,  CHNER EUGEN-WALTER B ,  DEIMLING AXEL ,  GAUSEPOHL HERMANN ,  SCHADE CHRISTIAN

    IPC: B01J19/18 ,  C08F2/00 ,  C08F279/02 ,  C08F287/00

    Abstract: A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization is utilized to remove the solvent for the rubber, this solvent having a boiling point lower than those of styrene and ethylbenzene, from at least one of the polymerization reactors via distillation with distillative cooling, and the solvent is reintroduced into the process of rubber preparation.

    Polymerization of conjugated dienes in a vinyl aromatic compound, useful for the production of toughened polystyrene, uses a lanthanide metal alkenyl complex and organoaluminum or boron co-catalyst
    19.
    发明专利
    Polymerization of conjugated dienes in a vinyl aromatic compound, useful for the production of toughened polystyrene, uses a lanthanide metal alkenyl complex and organoaluminum or boron co-catalyst 未知

    公开(公告)号：DE19926283A1

    公开(公告)日：2000-12-14

    申请号：DE19926283

    申请日：1999-06-09

    Applicant: BASF AG

    Inventor： JUENGLING STEPHAN ,  SCHADE CHRISTIAN ,  GAUSEPOHL HERMANN ,  WARZELHAN VOLKER

    IPC: C08F12/04 ,  C08F36/04 ,  C08L55/02 ,  C08F4/52 ,  C08F297/04

    Abstract: Solution polymerization of conjugated dienes in a vinyl aromatic compound is carried out using a lanthanide metal alkenyl complex and organoaluminum or boron co-catalyst. A process for the solution of conjugated dienes in a vinyl aromatic compound in the presence of a catalyst is claimed. The catalyst is prepared by reaction of an alkenyl complex of a lanthanide metal with a co-catalyst comprising: (A) an organoaluminum compound of formula (1)-(6); and (B) a boron compound of formula (7). AlR (1) HAlR (2) R AlOR (3) RAl(OR) (4) R Al(OAl(R))nOAlR (5) (OAl(R))n+2 (6) B(Y)p(C6H5-qR q)3-p (7) (DkH) (BYp(C6H5-qR q)4-p (8) R = 1-12C alkyl; n = 1-50; R = fluorine or 1-10C fluoroalkyl; Y = alkyl, C R 5, a sulfonate O3SR or O3SR , an amide NR 2, a pyridyl NC5R 5, a dipyridyl N2C10R 8, a pyrazolate N2C3R 3, a pyrazolylborate R B(N2C3R 3)3, a benzamidinate (R N)2CC6H5R , an alcoholate or phenolate OR , a siloxane OSiR 3, a thiolate SR , a cyclopentadienyl C5HrR 5-r, an indenyl C9H7-sR s, a fluorenyl C13H9-tR t, a phenyl C6HrR25-r, 1-20 C alkyl, alkenyl or alkinyl; R = H or 1-30C alkyl, 6-30C aryl or an optionally substituted silyl group; r,s = 0-5; t = 0-9; p = 0-2; q = 1-5; D = neutral donor ligand; k = 0-10.

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