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    MANUFACTURE OF PAPER
    12.
    发明专利
    MANUFACTURE OF PAPER 未知

    公开(公告)号：AU553980B2

    公开(公告)日：1986-07-31

    申请号：AU5489880

    申请日：1980-01-24

    Applicant: BASF AG

    Inventor： HARTMANN JUERGEN ,  STEDEFEDER JOACHIM ,  DENZINGER WALTER ,  PFOHL SIGBERG

    IPC: D21H19/20 ,  D21H17/43 ,  D21H1/38

    Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

    13.
    发明专利
    未知

    公开(公告)号：FI64964B

    公开(公告)日：1983-10-31

    申请号：FI800072

    申请日：1980-01-10

    Applicant: BASF AG

    Inventor： HARTMANN JUERGEN ,  STEDEFEDER JOACHIM ,  DENZINGER WALTER ,  PFOHL SIGBERG

    IPC: D21H19/20 ,  D21H17/43 ,  D21H3/38

    Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

    14.
    发明专利
    未知

    公开(公告)号：NO800183L

    公开(公告)日：1980-07-28

    申请号：NO800183

    申请日：1980-01-25

    Applicant: BASF AG

    Inventor： HARTMANN JUERGEN ,  STEDEFEDER JOACHIM ,  DENZINGER WALTER ,  PFOHL SIGBERG

    IPC: D21H19/20 ,  D21H17/43 ,  D21H

    Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

    Process and apparatus for the polymerisation of monoolefines
    17.
    发明专利
    Process and apparatus for the polymerisation of monoolefines 未知

    公开(公告)号：GB1037103A

    公开(公告)日：1966-07-27

    申请号：GB1793163

    申请日：1963-05-07

    Applicant: BASF AG

    Inventor： SCHMID KARL ,  STEDEFEDER JOACHIM ,  JOHN GUENTHER ,  HAEBERLE MANFRED ,  LAUTENSCHLAGER HANS ,  TRIESCHMANN HANS GEORG

    IPC: C08F2/00 ,  B01J8/38 ,  C08F2/34 ,  C08F10/00

    Abstract: Polymers of monoolefins are made by polymerizing the monomers in the presence of a catalyst comprising chromium oxide or a "Ziegler-type" catalyst, and optionally hydrogen, at temperatures below the softening point of the polymers formed, in a fluidized bed formed from the catalysts, and the polymers formed at a flow velocity of the monoolefin in the fluidized bed of up to about 15 cm./sec., wherein the ratio of the diameter to the height of the fluidized layer is between 1:1 and 1:8 and the fluidized bed is stirred by moving the particles of polymer formed and particles of catalyst in the direction of the monoolefin by means of a stirrer having a shaft on which blades are provided in spaced relation and which rotate at 20 to 250 r.p.m. The Specification also includes an apparatus for effecting the above process which comprises a container having a cylindrical portion and an upper portion which tapers outwardly, and a shaft rotatable in the cylindrical portion which has mounted thereon a plurality of spaced blades obliquely arranged so that an upward movement is imparted to material in the container. The blades are preferably provided at their outer ends with portions in the shape of ring segments and the blades are arranged on axes which are perpendicular to the stirrer shaft and uniformly twisted with respect to each other. The Specification contains a long list of catalysts which may be used. Exemplified catalysts are chromium oxides supported on SiO2 or aluminium silicate; triisobutyaluminium and TiCl3; triethylaluminium, TiCl3, and di-n-butylformamide or diethylene glycol diethyl ether; triethylaluminium, TiCl3, and triphenylphosphine oxide; a complex of 3TiCl3.AlCl3, diethylaluminium chloride and triphenylbutylphosphonium chloride, a mixture of methylaluminium sesquichloride, carbon black, and vanadium oxychloride, and a mixture of diethylaluminium chloride and 3TiCl3.AlCl3. Exemplified monomers are ethylene, propylene, a mixture of ethylene and butene-1, a mixture of ethylene and propylene, and 4-methylpentene-1.

    PROCESS FOR THE MANUFACTURE OF PAPER HAVING A HIGH DRY STRENGTH AND A LOW WET STRENGTH
    19.
    发明专利
    PROCESS FOR THE MANUFACTURE OF PAPER HAVING A HIGH DRY STRENGTH AND A LOW WET STRENGTH 未知

    公开(公告)号：CA1126594A

    公开(公告)日：1982-06-29

    申请号：CA310918

    申请日：1978-09-08

    Applicant: BASF AG

    Inventor： STEDEFEDER JOACHIM ,  GUENDER WOLF ,  PFOHL SIGBERG

    IPC: D21H19/20 ,  D21H17/43 ,  D21H1/10 ,  D21D3/00

    Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a copolymer of (a) from 90 to 30% by weight of acrylic acid and/or methacrylic acid and (b) from 10 to 70% by weight of acrylonitrile, methacrylonitrile, acrylamide and/or methacrylamide, with or without (c) up to 30% by weight of an ester of acrylic acid or methacrylic acid, which copolymer has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20.degree.C. and drying the impregnated paper. The copolymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

    MANUFACTURE OF PAPER
    20.
    发明专利
    MANUFACTURE OF PAPER 未知

    公开(公告)号：AU5489880A

    公开(公告)日：1980-07-31

    申请号：AU5489880

    申请日：1980-01-24

    Applicant: BASF AG

    Inventor： HARTMANN JUERGEN ,  STEDEFEDER JOACHIM ,  DENZINGER WALTER ,  PFOHL SIGBERG

    IPC: D21H19/20 ,  D21H17/43 ,  D21H1/38

    Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

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