中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

64 records (took 0.076 seconds)

    31.
    发明专利
    未知

    公开(公告)号：DE4107635A1

    公开(公告)日：1992-09-10

    申请号：DE4107635

    申请日：1991-03-09

    Applicant: BASF AG

    Inventor： BROSIUS SIBYLLE DR ,  RUEMPLER KLAUS-DIETER DR ,  SEILER ERHARD DR ,  HAHN SUSANNE DR ,  HUBER KARL ,  WERNER RAINER ALEXANDER DR

    IPC: C08F255/02

    Abstract: A partially crosslinked polymer composition having a melt flow index of from 0.1 to 50 g/10 min at 230 DEG C. under a weight of 2.16 kg and comprising a) a polymer comprising from 25 to 95% by weight of polypropylene and 5 to 75% by weight of a propylene copolymer with copolymerized C2-C10-alk-1-enes, the comonomer content being from 1 to 45% by weight, based on the total polymer, b) an organosilane compound of the formula (I) A4-nSiRn(i) where A are identical or different acrylates or methacrylates or vinyl groups, R are identical or different C1-C8-alkoxy or C1-C8-acetoxy groups, and n is 1, 2 or 3, obtainable by reacting the polymer a) with the organosilane compound b) in the presence of a free-radical initiator and in the presence of a condensation catalyst at from 180 DEG to 280 DEG C., and at from 1 to 100 bar and at a mean residence time of the reaction mixture of from 0.2 to 10 minutes, has, in particular, high notched impact strength, increased puncture resistance and improved weld line strength.

    Process for the preparation of a modified titanium component for the Ziegler-Natta catalyst systems
    35.
    发明专利
    Process for the preparation of a modified titanium component for the Ziegler-Natta catalyst systems 未知

    公开(公告)号：DE3432759A1

    公开(公告)日：1986-03-13

    申请号：DE3432759

    申请日：1984-09-06

    Applicant: BASF AG

    Inventor： STAIGER GERHARD DR ,  WERNER RAINER ALEXANDER DR ,  GRUBER WOLFGANG DR

    IPC: C08F4/64 ,  C08F10/00

    Abstract: The invention relates to the preparation of a titanium component (1) for Ziegler-Natta catalyst systems, in which first (1.a) an intermediate is prepared from (1.a.1) titanium tetrachloride, (1.a.2) a modifier and (1.a.3) magnesium alkoxide, and then (1.b) the titanium component is prepared from (1.b.1) titanium tetrachloride, (1.b.2) the intermediate from (1.a) and optionally (1.b.3) a further modifier, characterised in that the titanium component (1) is obtained by first (1.1) preparing a first intermediate from (1.1.1) titanium tetrachloride, (1.1.2) a modifier comprising (1.1.2.1) a titanic ester and (1.1.2.2) p-phthalic anhydride and (1.1.3) magnesium alkoxide, then (1.2) a second intermediate is prepared from (1.2.1) titanium tetrachloride, (1.2.2) the intermediate from (1.1) and optionally (1.2.3) o-phthalic anhydride as further modifier, and finally (1.3) the titanium component is prepared from (1.3.1) titanium tetrachloride and (1.3.2) the intermediate from (1.2).

    38.
    发明专利
    未知

    公开(公告)号：DE59105679D1

    公开(公告)日：1995-07-20

    申请号：DE59105679

    申请日：1991-01-08

    Applicant: BASF AG

    Inventor： SCHWAGER HARALD DR ,  KERTH JUERGEN DR ,  ZOLK RALF DR ,  KOELLE PETER DR ,  WERNER RAINER ALEXANDER DR

    IPC: C08F4/655 ,  C08F4/60 ,  C08F297/02 ,  C08F297/08

    Abstract: Propylene-ethylene copolymers obtainable by two-step polymerisation from the gas phase in an agitated fixed bed by means of a Ziegler-Natta catalyst system containing an aluminium compound as cocatalyst in addition to a titanium-containing solid component, in which, in a first polymerisation step, propylene is polymerised at a pressure of from 20 to 40 bar, a temperature of from 60 to 90 DEG C and a mean residence time of the reaction mixture of from 1 to 5 hours, giving from 0.05 to 2 kg of polypropylene per mmol of the aluminium compound, and subsequently, in a second polymerisation step, a mixture of propylene and ethylene is polymerised onto the polymer discharged from the first polymerisation step, at a pressure of from 5 to 30 bar, this pressure being at least 7 bar below the pressure in the first polymerisation step, a temperature of from 30 to 100 DEG C and a mean residence time of the reaction mixture of from 1 to 5 hours, the ratio between the partial pressures of propylene and ethylene being set in the range from 0.5 : 1 to 5 : 1, and a) the weight ratio between the monomers reacted in the first and second polymerisation steps is set so that it is in the range from 2.5 : 1 to 20 : 1, or b) the polymerisation in the second polymerisation step is carried out in the presence of a C1-C8 alkanol, the weight ratio between the monomers reacted in the first and the second polymerisation steps being from 1 : 1 to 20 : 1. s

Patent Agency Ranking