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    Ethylene copolymer emulsion - by copolymering ethylene and unsaturated comonomer containing oxygen and/or sulphur
    3.
    发明专利
    Ethylene copolymer emulsion - by copolymering ethylene and unsaturated comonomer containing oxygen and/or sulphur 未知

    公开(公告)号：DE2161880A1

    公开(公告)日：1973-06-20

    申请号：DE2161880

    申请日：1971-12-14

    Applicant: BASF AG

    Inventor： KUCHNER KARL DR ,  KUEHNEWEG OTTO ,  OTTERBACH HANS DR ,  PENNING ERNST DR ,  SLIWKA WOLFGANG DR

    IPC: C08F2/22 ,  C08F10/00 ,  C08F1/13

    Abstract: Ethylene copolymer dispersions with a high solids content and a good freeze-thaw stability are prepd. by the aq. emulsion polymsn. of ethylene and an unsatd. comonomer contg. oxygen and/or sulphur in an amount giving a copolymer contg. 2.0 - 4.0 wt.% oxygen and/or 0.5 - 1.0 wt.% sulphur, in the presence of a free radial initiator, and of 2 - 20 wt.%, based on aqs. phase, of an emulsifier consisting of a mixt. of a 10 - 25C alkali metal alkylsulphonate and/or alkylsulphate, and a satd. or unsatd. fatty acid polyoxyethylate with 10 - 25C atoms in the carboxylic acid group, and 3 - 15 alkylene oxide units. The unsatd. comonomer is sodium vinylsulphonate. The emulsifier consists of a mixt. of a 13 - 17C alkali metal alkylsulphonate and an oleic acid oxyethylate with S ethylene oxide units.

    Use of a specific propene polymer for the production of films
    4.
    发明专利
    Use of a specific propene polymer for the production of films 未知

    公开(公告)号：DE3732953A1

    公开(公告)日：1989-04-13

    申请号：DE3732953

    申请日：1987-09-30

    Applicant: BASF AG

    Inventor： SCHOENE WERNER DR ,  GRUBER WOLFGANG DR ,  DREYER WILHELM DR ,  WERNER RAINER ALEXANDER DR ,  KUCHNER KARL DR ,  HUBER KARL

    IPC: C08F2/34 ,  C08F10/06 ,  C08F210/06 ,  C08J5/18 ,  C08L23/14

    Abstract: The invention relates to the production of films from propene polymers, characterised in that propene polymers are employed which are obtained by continuous preparation of random copolymers of propene by polymerization of a monomer mixture by means of a Ziegel-Natta catalyst system in the gas phase in a central stirred bed of finely divided polymer with dissipation of the heat of polymerization by evaporative cooling, where the monomer mixture is constantly introduced into the polymerization zone and the polymer is constantly discharged from the polymerization zone, with the provisos that (a) the pressure and temperature in the polymerization zone are kept in a range which corresponds to the gaseous state of the monomer mixture, (b) gaseous, unconsumed monomer mixture is discharged from the polymerization zone and is re-introduced into the polymerization zone in liquid form, (c) the temperature in the polymerization zone is regulated by means of the amount of liquid monomer mixture introduced per time unit, and (d) the monomers consumed by polymerization are replaced, with the particular feature that - using a monomer mixture comprising principally propene, a little ethylene and very little hydrogen - the residence time of the monomer mixture in the polymerization zone is kept very short.

    7.
    发明专利
    未知

    公开(公告)号：DE3784148D1

    公开(公告)日：1993-03-25

    申请号：DE3784148

    申请日：1987-11-25

    Applicant: BASF AG

    Inventor： GRUBER WOLFGANG DR ,  SCHWEIER GUENTHER DR ,  SCHOENE WERNER DR ,  SCHNEIDER PAUL ,  KUCHNER KARL DR ,  HUBER KARL

    IPC: C08F2/34 ,  C08F4/00 ,  C08F4/60 ,  C08F4/64 ,  C08F210/16

    Abstract: Continuous prodn. of random copolymers (I) of propene with other monoalkenes is carried out in the qas phase in the presence of a Ziegler-Natta catalyst system at 50-80 deg.C and 20-35 bar in a centric stirred bed of small polymer particles with a Froude No. of 1-3, in which the heat of polymerisation is removed by evaporative cooling. The monomer mixt. is supplied and (I) is discharged from the polymerisation zone continuously or cyclically. The process is carried out under conditions such that: (a) the polymerisation zone is kept in a pressure and temp. range at which the monomer mixt. is gaseous; (b) the unpolymerised monomer mixt. is discharged as gas, liquefied, stored and recycled to the polymerisation zone in liq. form; (c) the temp. in the polymerisa-tion zone is controlled by monitoring the temp. continuously and varying the amt. of liq. monomer mixt. introduced in unit time, which vaporises in the reactor; and (d) replacing the polymerised monomers by supplying fresh monomers. The novelty is that the monomer mixt. used contains 0.5-3.5 mole-% ethylene and 0.2-1.0 mole-%. H2 w.r.t. propene nand the dwell time of the monomer mixt. in the polymerisation zone is 0.5-8 min.

    Use of a special propene polymer in the production of heat-sealable films
    9.
    发明专利
    Use of a special propene polymer in the production of heat-sealable films 未知

    公开(公告)号：DE3732933A1

    公开(公告)日：1989-04-13

    申请号：DE3732933

    申请日：1987-09-30

    Applicant: BASF AG

    Inventor： SCHOENE WERNER DR ,  GRUBER WOLFGANG DR ,  DREYER WILHELM DR ,  WERNER RAINER ALEXANDER DR ,  KUCHNER KARL DR ,  HUBER KARL

    IPC: B32B27/32 ,  C08F2/34 ,  C09J123/14

    Abstract: The framework of the invention is the production of heat-sealable films consisting of (i) a basic film of polypropene (polypropylene) and (ii) a heat-sealable layer which is applied to the basic film and comprises a propene polymer with a relatively low softening point. The characteristic feature is that the propene polymers used for the heat-sealable layer are those obtained by continuous production of random copolymers of propene by polymerisation of a monomer mixture by means of a Ziegler-Natta catalyst system in the gas phase in a centric stirred bed comprising small-particulate polymer with removal of the heat of polymerisation by evaporative cooling, the monomer mixture being introduced constantly into the polymerisation zone and the polymer being constantly discharged from the polymerisation zone, with the provisos that (a) in the polymerisation zone pressure and temperature are kept in a range corresponding to the gaseous state of the monomer mixture, (b) gaseous, unconsumed monomer mixture is discharged from the polymerisation zone and reintroduced into the polymerisation zone in the liquid state, (c) the temperature in the polymerisation zone is controlled by means of the amount of liquid monomer mixture introduced per unit time, and (d) the monomer consumed by polymerisation is replaced, with the special feature that - with the use of a monomer mixture comprising principally propene, a little ethene and very little hydrogen - the residence time of the ... Original abstract incomplete.

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