中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

104 records (took 0.021 seconds)

    31.
    发明专利
    未知

    公开(公告)号：DE4231749A1

    公开(公告)日：1994-03-24

    申请号：DE4231749

    申请日：1992-09-23

    Applicant: BASF AG

    Inventor： MUELLER HANS-JOACHIM DR ,  FOLLMER GODOFREDO DR ,  KONRAD RAINER DR ,  SAIVE ROLAND DR ,  LUX MARTIN DR ,  GOERTZ HANS-HELMUT DR ,  FUNK GUIDO DR

    IPC: C08F4/02 ,  C08F4/22 ,  C08F4/24 ,  C08F10/00

    Abstract: Process for the preparation of a supported catalyst for the polymerisation of alpha -olefins, in which (1) a support gel containing silicon dioxide is prepared by (1.1) introducing a sodium or potassium waterglass solution into a rotating stream of an aqueous mineral acid both longitudinally and tangentially to the stream, spraying the silicic acid hydrosol thus formed in droplet form into a gaseous medium, allowing it to solidify into a hydrogel and freeing the hydrogel thus obtained of salt by washing without prior aging, (1.2) drying the hydrogel resulting from (1.1) to form the support gel, and (2) the support gel (1) is loaded with chromium trioxide or a chromium compound which can be converted into chromium trioxide under the conditions of the process step (3), which results in a chromium-containing support gel, and (3) the chromium-containing support gel (2) is heated in an anhydrous gas stream containing oxygen in a concentration of over 10% by volume for from 10 to 1000 minutes at from 400 to 1100 DEG C, the hydrogel resulting from the process step (1.1) being dried in the process step (1.2) over a time of not more than 60 seconds in a shaping flash dryer at an inlet temperature of from 80 to 400 DEG C .

    33.
    发明专利
    未知

    公开(公告)号：DE4106909A1

    公开(公告)日：1992-09-10

    申请号：DE4106909

    申请日：1991-03-05

    Applicant: BASF AG

    Inventor： GOERTZ HANS-HELMUT DR ,  HATZMANN GUENTER DR ,  OSCHMANN WERNER DR

    IPC: C08F2/22 ,  C08F285/00 ,  C08L27/06 ,  C08L51/00

    Abstract: The invention relates to graft copolymers obtainable by …… A) Emulsion polymerisation of from 5 to 35% by weight of a monomer mixture comprising …… a1) 60-80% by weight of at least one vinyl aromatic monomer, … a2) 20-40% by weight of at least one ethylenically unsaturated nitrile … a3) 0-10% by weight of at least one di- or polyethylenically unsaturated monomer, … and … B) subsequent emulsion polymerisation, in the presence of the emulsion polymer obtained from step A), of 20-45% by weight of a monomer mixture comprising …… b1) 50-75% by weight of at least one vinyl aromatic monomer, … b2) 25-50% by weight of at least one C1-C18-alkyl acrylate … b3) 0-10% by weight of at least one di- or polyethylenically unsaturated monomer, … and … C) subsequent emulsion polymerisation, in the presence of the emulsion polymer obtained in step B), of 5-35% by weight of a monomer mixture comprising …… c1) 60-80% by weight of at least one vinyl aromatic monomer, … c2) 20-40% by weight of at least one ethylenically unsaturated nitrile … c3) 0-10% by weight of at least one di- or polyethylenically unsaturated monomer, … and … D) subsequent emulsion polymerisation, in the presence of the emulsion polymer obtained in Step C), of 15-45% by weight of a monomer mixture comprising …… d1) 80-99.9% by weight of at least one C1-C18-alkyl acrylate, … d2) 0.1-10% by weight of at least one di- or polyethylenically unsaturated monomer. ……

    37.
    发明专利
    未知

    公开(公告)号：DE3815291A1

    公开(公告)日：1989-11-23

    申请号：DE3815291

    申请日：1988-05-05

    Applicant: BASF AG

    Inventor： BAUR RICHARD DR ,  STOECKIGT DIETER ,  NEUMANN HANS-WERNER DR ,  GOERTZ HANS-HELMUT DR ,  WAGNER NORBERT DR

    IPC: C11D1/72 ,  C11D3/02 ,  C11D3/04 ,  C11D3/20 ,  C11D3/37

    Abstract: The compositions contain as essential components… (a) 1 to 20% by weight of at least one non-ionic surfactant based on alkoxylated fatty alcohols, fatty acids, fatty amines, fatty acid amides or alkanesulphonamides,… (b) 0.1 to 15% by weight of at least one polyether polyol which is obtainable by reaction of 2 to 6-hydric alcohols, which have 2 to 10 C atoms, with alkylene oxides containing 2 to 4 C atoms, and reaction of these reaction products with 1,2-alkylene oxides, alkyl or alkenyl glycidyl ethers containing 8 to 30 C atoms and… (c) 1 to 40% by weight of at least one acid.

Patent Agency Ranking