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    Production of cyanuric acid
    22.
    发明专利
    Production of cyanuric acid 未知

    公开(公告)号：GB1042174A

    公开(公告)日：1966-09-14

    申请号：GB2631363

    申请日：1963-07-03

    Applicant: BASF AG

    Inventor： CLAREN OTTO BERND ,  UNTERSTENHOEFER LEO

    IPC: C07D20060101

    Abstract: In the production of cyanuric acid by thermal decomposition of urea, a layer of urea between 0.5 mm. and 5.0 mm. is heated to between 250 DEG and 380 DEG C. and kept at this temperature for 5 to 30 minutes. The urea, in solid or liquid form, may be deposited as a layer on an endless conveyer belt and heated thereon. In an example, molten urea was passed down a shoot heated to a temperature above the melting-point of urea on to a metal conveyer belt heated to 300 DEG C. to form a layer 2 mm. thick. After eleven minutes, flakes of cyanuric acid were collected.

    MANUFACTURE OF THERMOPLASTICS FIBRIDS
    25.
    发明专利
    MANUFACTURE OF THERMOPLASTICS FIBRIDS 未知

    公开(公告)号：CA1053871A

    公开(公告)日：1979-05-08

    申请号：CA200541

    申请日：1974-05-22

    Applicant: BASF AG

    Inventor： ENGLER PETER ,  NAGEL OTTO ,  UNTERSTENHOEFER LEO ,  FRIELINGSDORF HANS ,  BERBNER HEINZ ,  MUELLER-TAMM HEINZ ,  STOEHR DIETER

    IPC: D01F6/04 ,  D01D5/00 ,  D01D5/11 ,  D01D5/40 ,  D01F6/60 ,  B01D5/00

    Abstract: A process for the manufacture of thermoplastic fibrids by shredding a solution of a polymeric thermoplastic in a field of shearing forces, said shredding being performed by passing a homogeneous solution of the thermoplastic in an organic solvent, which is a solvent for said thermoplastic only at elevated temperature, through a nozzle having one or more orifices in the form of an annular die into a zone having the form of an impulse exchange chamber which has a mean inlet diameter of from 2 to 20 times that of the circular area equal to the total cross-sectional area of the nozzle orifices through which the homogeneous solution is extruded and a length of from 2 to 30 times its hydraulic diameter, in which chamber the homogeneous solution is cooled such that the thermoplastics material precipitates and in which a turbulent field of shear forces exists, this being produced by the introduction of one or more jets of a gaseous or liquid medium, which jets are located centrally to the annular orifice, into said impulse exchange chamber at a velocity of from 5 to 500 m/s.

    Adhesive Compositions
    27.
    发明专利
    Adhesive Compositions 未知

    公开(公告)号：GB1171185A

    公开(公告)日：1969-11-19

    申请号：GB257667

    申请日：1967-01-18

    Applicant: BASF AG

    Inventor： TRIESCHMANN HANS-GEORG ,  UNTERSTENHOEFER LEO ,  BERBNER HEINZ

    IPC: C08L25/06 ,  C08L95/00 ,  C09J123/08 ,  C09J131/00 ,  C09J131/02 ,  C09J133/06 ,  C09J195/00

    Abstract: 1,171,185. Laminates. BADISCHE ANILIN & SODA-FABRIK A.G. 18 Jan., 1967 [19 Jan., 1966], No. 2576/67. Heading B5N. [Also in Divisions B6 and C3] Polyolefines, e.g. polyethylene, polypropylene, polybutylene - 1 or poly - 4 - methyl - pentene-1 are bonded to each other or to concrete, metal, wood, woven or non-woven fabrics or paper using an adhesive comprising a copolymer of ethylene with vinyl acetate and/or vinyl propionate and/or acrylic compounds, bitumen and expandible polystyrene. In an example, a polyethylene sheet is bonded to a sheet of bitumen and ethylene copolymer using an adhesive composition containing an ethylenevinyl acetate copolymer, bitumen and unexpanded and pre-expanded expandible polystyrene in a mould for roofing elements using the steam injection method.

    Continuous production of foamed synthetic resins
    28.
    发明专利
    Continuous production of foamed synthetic resins 未知

    公开(公告)号：GB1115060A

    公开(公告)日：1968-05-22

    申请号：GB3970165

    申请日：1965-09-17

    Applicant: BASF AG

    Inventor： UNTERSTENHOEFER LEO

    IPC: B01F3/04 ,  B01F5/06 ,  B29B7/32 ,  B29B7/74 ,  C08J9/30

    Abstract: Foamed synthetic resins are produced from solutions of curable synthetic resins by mixing a foam of a solution of a foaming agent which has been foamed up with a compressed gas with a solution of a synthetic resin and curing the resultant synthetic resin foam, wherein the foam is produced in a tubular vessel into the inlet end of which a solution of a foaming agent is introduced axially and a compressed gas is introduced tangentially and the introduction of a solution of the synthetic resin into the foam produced is carried out near to the end of a tube which is attached to the tapering outlet end of the tubular vessel. Specified resins are ureaformaldehyde and melamine-formaldehyde condensates, and suitable foaming agents are alcohol sulphonates. A hardener may be added to the foaming agent solution, e.g. an organic or an inorganic acid.

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