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    Process for the removal of volatiles from polymer solutions
    1.
    发明授权
    Process for the removal of volatiles from polymer solutions 失效
    从聚合物溶液中除去挥发物的方法

    公开(公告)号：US3865672A

    公开(公告)日：1975-02-11

    申请号：US27536072

    申请日：1972-07-26

    Applicant: BASF AG

    Inventor： METZINGER LOTHAR ,  GOTTSCHALK ALFRED ,  SCHOETTLE KLAUS ,  SCHWAAB JOSEF

    IPC: C08F6/10 ,  B01D1/00 ,  F26B7/00

    CPC classification number: C08F6/10

    Abstract: Process for the removal of volatiles, in a single stage by vacuum evaporation, from polymer solutions obtained in the continuous solution polymerization of monomer mixtures containing acrylonitrile or methacrylonitrile. The evaporation is effected in a devolatilizing zone in which the temperature of the polymer solution rises in its direction of flow. This process causes no damage to the polymers on account of decomposition products of the heat-sensitive nitrile monomers.

    Abstract translation: 通过真空蒸发在一个阶段除去在含丙烯腈或甲基丙烯腈的单体混合物的连续溶液聚合中获得的聚合物溶液中的挥发物的方法。

    Production of impact resistant and rigid compositions based on polystyrene
    4.
    发明专利
    Production of impact resistant and rigid compositions based on polystyrene 未知

    公开(公告)号：GB979652A

    公开(公告)日：1965-01-06

    申请号：GB2416863

    申请日：1963-06-18

    Applicant: BASF AG

    Inventor： DAUMILLER GUENTHER ,  WILLERSINN HERBERT ,  METZINGER LOTHAR ,  POHLEMANN HEINZ ,  JOST KONRAD

    IPC: C08F36/00 ,  C08F279/02 ,  C08F279/04

    Abstract: Impact resistant graft polymeric materials are made by polymerizing 97 to 70 parts by weight of styrene, or a mixture of styrene and acrylonitrile in a weight ratio of from 90:10 to 65:35, in the presence of 3 to 30 parts by weight of a copolymer of 30 to 90 parts by weight of butadiene and 10 to 70 parts by weight of a C3-C18 alcohol ester of an unsaturated carboxylic acid, the copolymer having a K value of between 50 and 150. Specified carboxylic esters are n-butyl and 2-ethylhexyl acrylates, di-n-butyl and diisobutyl fumarates, and di-n-propyl maleate. The styrene-containing monomeric material may contain minor amounts of other monomers, e.g. alpha-methyl styrene, vinyl toluene or chlorostyrene. In addition to the carboxylic esters of the defined type, the butadiene copolymers may contain minor proportions of other monomers, e.g. methyl methacrylate, cyclohexyl acrylate and vinyl carbazole. The butadiene copolymer may be supplemented by other rubbery polymers, e.g. copolymers of butadiene and styrene or acrylonitrile, polychloroprene, polybutadiene and polyacrylates. The polymerization is preferably carried out by dissolving the butadiene copolymer in the styrene-containing monomeric material with the aid, if desired, of an organic solvent, and heating the mixture in the presence of a catalyst, e.g. di-tert.-butyl peroxide, benzoyl peroxide or azodiisobutyronitrile. Also present during polymerization may be regulators and lubricants.

    Production of anhydrous polymer solutions
    5.
    发明专利
    Production of anhydrous polymer solutions 未知

    公开(公告)号：GB1110008A

    公开(公告)日：1968-04-18

    申请号：GB3369765

    申请日：1965-08-06

    Applicant: BASF AG

    Inventor： WILLERSINN HERBERT ,  NAARMANN HERBERT ,  METZINGER LOTHAR

    IPC: C08F279/02 ,  C08J3/09 ,  C08J3/11

    Abstract: Polymer solutions having a water content of less than 0-1% by weight, are produced from systems containing a polymer and at least 5% water by dissolving the polymer in at least an equal amount of an organic liquid consisting exclusively or partly of an ethylenically unsaturated compound, adding to the resulting solution 0-05 to 20% of an inorganic sedimentation aid and removing the water and undissolved constituents by means of a separator at 5 DEG to 50 DEG C. The water-containing polymer system may be a water-moist polymer or an aqueous polymer dispersion e.g. produced by emulsion or suspension polymerization. The unsaturated liquid used may be mixed with a conventional solvent. The sedimentation aids specified are kaolin, ZnO, TiO2, Al2O3, BaSO4, whiting and Ca(OH)2 and/or silica gel. When a polymer dispersion is treated, an electrolytic precipitant, e.g. dilute H2SO4, CaCl2, Al2(SO4)3 or NaCl may be added before or after the organic liquid. Separating agents, e.g. polyethers such as polypropylene and polyethylene glycols may also be added. In Example 1 a polybutadiene containing 32-5% H2O is dissolved in styrene, Al2O3 is added and the water is removed by centrifugation. In Example 2 a mixture of styrene and ethylbenzene is used to dissolve a butadiene/styrene/di-n-butyl fumarate polymer containing 9.2% H2O, kaolin is added and the water is removed in a continuous separator. In Example 3 a solution comprising styrene, polypropylene glycol, aqueous NaCl and aqueous H2SO4 is added to a 10% aqueous polybutadiene dispersion, the bulk of the water is removed, kaolin is added and the remaining water removed in a continuous separator.

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