中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

36 records (took 0.022 seconds)

    Process for the preparation of homopolymers and copolymers of alpha -monoolefins by means of a Ziegler-Natta catalyst system
    21.
    发明专利
    Process for the preparation of homopolymers and copolymers of alpha -monoolefins by means of a Ziegler-Natta catalyst system 未知

    公开(公告)号：DE3428478A1

    公开(公告)日：1986-02-13

    申请号：DE3428478

    申请日：1984-08-02

    Applicant: BASF AG

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

    IPC: C08F4/58 ,  C08F4/64 ,  C08F10/00 ,  C08F4/52

    Abstract: The invention relates to the polymerisation of alpha -monoolefins by means of a catalyst system comprising (1) a titanium component obtained by first (1.a) preparing an intermediate from (1.a.1) titanium tetrachloride, (1.a.2) a modifier and (1.a.3) magnesium alkoxide, and then (1.b) preparing the titanium component from (1.b.1) titanium tetrachloride, (1.b.2) the intermediate from (1.a) and optionally (1.b.3) a further modifier; (2) an alkyl aluminium compound; (3) a cocatalyst, characterised in that (i) a titanium component (1) is employed which is obtained by first (1.1) preparing a first intermediate from (1.1.1) titanium tetrachloride, (1.1.2) a modifier made from (1.1.2.1) an ester of titanic acid and o-phthalic anhydride, and (1.1.3) magnesium alkoxide, then (1.2) preparing a second intermediate 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) preparing the titanium component from (1.3.1) titanium tetrachloride and (1.3.2) the intermediate from (1.2); and (ii) a trialkoxy silane is employed as cocatalyst (3).

    Process for preparing propylene homopolymers
    22.
    发明专利
    Process for preparing propylene homopolymers 未知

    公开(公告)号：DE3413754A1

    公开(公告)日：1985-10-24

    申请号：DE3413754

    申请日：1984-04-12

    Applicant: BASF AG

    Inventor： STAIGER GERHARD DR ,  JAGGARD JAMES F R DR ,  BALL WOLFGANG DR ,  GRUBER WOLFGANG DR ,  SCHOENE WERNER DR

    IPC: C08F4/64 ,  C08F10/06 ,  C08F110/06

    Abstract: The background is the homopolymerisation of propylene in the gas phase with the removal of the heat of polymerisation by evaporative cooling, the propylene being introduced into the polymerisation zone (P) and the polymer (P) being removed, and (a) the pressure and temperature in (P) being held in a range corresponding to the gaseous state of the propylene, (b) gaseous, non-consumed propylene being removed from (P), liquefied, stored and reintroduced in the liquid state, (c) the temperature in (P) being controlled by measuring the temperature and changing the amount of liquid propylene introduced accordingly, (d) replacing the consumed propylene, and (e) using a Ziegler-Natta catalyst system which comprises a titanium-containing catalyst component (1) and an aluminium-containing catalyst component (2), (1) being a complex compound of (1.1) a substance of the formula TiCl3 +/- 0.33 AlCl3 and (1.2) a specific phosphorus compound and (2) being triethylaluminium. The characteristic feature is that the catalyst system additionally contains (3) tetramethylurea.

    PROCESS FOR THE PREPARATION OF A TITANIUM COMPONENT FOR ZIEGLER-NATTA TYPE POLYMERISATION CATALYSTS
    23.
    发明专利
    PROCESS FOR THE PREPARATION OF A TITANIUM COMPONENT FOR ZIEGLER-NATTA TYPE POLYMERISATION CATALYSTS 未知

    公开(公告)号：DE2963884D1

    公开(公告)日：1982-11-25

    申请号：DE2963884

    申请日：1979-07-11

    Applicant: BASF AG

    Inventor： STAIGER GERHARD DR

    IPC: C08F4/64 ,  C08F10/00

    Abstract: A special process for the preparation of a titanium component for polymerization catalysts of the Ziegler-Natta type, wherein (1) in a first stage (1.1) an alcoholate of the formula Mr(OR)2, where R is lower alkyl and (1.2) a chlorotoluene of the formula where X is chlorine or hydrogen, are milled together in a particular molar ratio in a vibratory ball mill under particular milling conditions, especially a relatively low temperature, in the absence of a diluent, thereafter (2) in a second stage (2.1) the material resulting from stage (1) is brought together with (2.2) titanium tetrachloride in a particular ratio, the batch is kept for some time at an elevated temperature, with constant mixing, and the resulting solid is isolated, excess titanium tetrachloride being separated off, and finally (3) in a third stage (3.1) the solid resulting from stage (2) is again brought together with (3.2) titanium tetrachloride in a particular ratio, the batch is again kept for some time at an elevated temperature, with constant mixing, and the resulting solid, constituting the novel titanium component, is isolated, excess titanium tetrachloride being removed. The novel titanium compound permits the production of polymers of alpha -monoolefins not only in high yield but also with high isotacticity.

    Low m wt polypropylene powder prodn - by gas phase ziegler polymerisation
    26.
    发明专利
    Low m wt polypropylene powder prodn - by gas phase ziegler polymerisation 未知

    公开(公告)号：DE2058122A1

    公开(公告)日：1972-05-31

    申请号：DE2058122

    申请日：1970-11-26

    Applicant: BASF AG

    Inventor： HERBECK RUDOLF DR ,  SCHOLL RICHARD ,  STAIGER GERHARD DR ,  STEDEFEDER JOACHIM DR ,  WISSEROTH KARL DR

    IPC: C08F10/06 ,  C08F110/06 ,  C08F3/10

    Abstract: Propylene opt. together with other monomers is polymerised in the gas phase in presence of Ziegler catalysts by introducing liquid propylene into the reaction zone, vaporising and polymerising, at catalyst activity is not 3000 pts. polymer/pt. catalyst-hr, using catalyst with molar ratio of Ti to al cpd. in 1:0.5-6 range, as in DT1720292, the process being modified by carrying out continuous polymerisation in presence of H2 as mol. wt. regulator and using mixt. of AlEt3 and AlEt2Cl in 4-1:1 molar ratio as reducing component of the Ziegler catalyst. This process can be used to produce polymer with intrinsic viscosity 3, i.e. 1.8-3.0 dl/g. in free-running, powder form, which can be processed conveniently in the fused state.

    Process for the preparation of a modified titanium component for Ziegler-Natta catalyst systems
    30.
    发明专利
    Process for the preparation of a modified titanium component for Ziegler-Natta catalyst systems 未知

    公开(公告)号：DE3411197A1

    公开(公告)日：1985-10-10

    申请号：DE3411197

    申请日：1984-03-27

    Applicant: BASF AG

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

    IPC: C08F4/10 ,  C08F4/12 ,  C08F4/14 ,  C08F4/16 ,  C08F10/00 ,  C08F4/52 ,  C08F10/06

    Abstract: The invention relates to the preparation of a modified titanium component (1) for Ziegler-Natta catalyst systems, in which first (1.1) in a first step (1.1.1) titanium tetrachloride is allowed to react with (1.1.2) an alkyl benzenecarboxylate to give a liquid, then (1.2) in a second step (1.2.1) the liquid resulting from (1.1) is reacted with (1.2.2) a magnesium alkoxide to give a solid, and finally (1.3) in a third step (1.2.1) titanium tetrachloride is reacted with (1.3.2) the solid resulting from (1.2) and optionally additionally (1.3.3) further alkyl benzenecarboxylate to give the titanium component (1) (= solid), characterised in that, in the preparation of (1), the alkyl benzenecarboxylate used under (1.1.2) is a diester of phthalic acid with a certain primary, secondary or tertiary alkanol. The result is a modified titanium component which allows highly stereoregular and morphologically excellent polymers to be prepared.

Patent Agency Ranking