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    Self-extinguishing thermoplastic compositions
    21.
    发明专利
    Self-extinguishing thermoplastic compositions 未知

    公开(公告)号：GB1124896A

    公开(公告)日：1968-08-21

    申请号：GB3673066

    申请日：1966-08-17

    Applicant: BASF AG

    Inventor： BURGER HEINZ ,  MOHR HEINRICH ,  PRIEBE EDMUND ,  REUTER LOTHAR ,  WEBER HEINZ

    IPC: C08K5/00 ,  C08K5/01

    Abstract: A self-extinguishing composition consists of (a) a normally solid thermoplastic homopolymer or copolymer of styrene which may be substituted by alkyl groups in the nucleus or side chain and which contains more than 50% by wt. of styrene or the substituted styrene having intimately incorporated therewith (b) an organic bromide having a plurality of bromine atoms attached to the carbon atoms and the bromine atoms constituting more than 40% of the bromide, in such an amount that the composition has a bromine content of 0.1-5%, and (c) 0.01-5% of (a) of a compound of formula where RA and RB are a phenyl radical which may be substituted by at least one C1- 3 aliphatic hydrocarbon radical, a C1- 4 alkoxy radical, Cl or Br; R1 and R2 are H, Cl, Br, a C1- 6 aliphatic hydrocarbon radical or cyclohexyl; R3 and R4 are Cl, Br, cyano, nitro, a C1- 6 aliphatic hydrocarbon radical or phenyl. The (a) polymer may be polystyrene and/or a copolymer of styrene and acrylonitrile. Compound (c) may be 2,3-diethyl - 2,3 - diphenylbutane; 2,2,3,3 - tetraphenylbutane or 2,3 - dimethyl - 2,3 - di - p - tolylbutane. The bromide (b) may be hexabromododecane, tris - (2,3 - dibromopropyl)-phosphate or tetrabromoethane. The composition may be made by dissolving the three components in methylene chloride. The composition may also contain a foaming agent, e.g. pentane, and may be formed into a foamed sheet.

    Pressure-resistant screw extruder
    24.
    发明专利
    Pressure-resistant screw extruder 未知

    公开(公告)号：GB1058585A

    公开(公告)日：1967-02-15

    申请号：GB3329865

    申请日：1963-10-04

    Applicant: BASF AG

    Inventor： WISSEROTH KARL ,  TRIESCHMANN HANS GEORG ,  MOHR HEINRICH ,  REUTER LOTHAR ,  SCHOLL RICHARD

    IPC: B29C47/10 ,  B29C48/67 ,  B29C48/72 ,  C08F10/02 ,  C08F110/02 ,  C08F210/16 ,  C08F255/02 ,  C08F255/10

    Abstract: 1,058,585. Pug-mills. BADISCHE ANILIN- & SODA-FABRIK A. G. Oct. 4, 1963 [Oct. 6, 1962], No. 33298/65. Divided out of 1,058,584. Heading B1C. [Also in Division Fl]. Apparatus for polymerizing ethylene comprises a mixing chamber 1 having at least two inlets 3, a regulatable discharge means 2, and a screw 4 having an axial bore 5 open at the discharge end and communicating with the chamber 1 by means of apertures 6 or the inlet end; in operation part of the materials are recycled through the hollow screw. The apertures 6 may be radial or inclined and may open into the flanks of the screw-thread (see Fig. 2, not shown); they may be circular, oval or slotshaped. The apparatus has heating and cooling means (not depicted), and a thermocouple 9, it may discharge to a degassing screw and a granulating apparatus.

    A process for the production of polyethylene with a branched structure
    26.
    发明专利
    A process for the production of polyethylene with a branched structure 未知

    公开(公告)号：GB901148A

    公开(公告)日：1962-07-18

    申请号：GB802661

    申请日：1961-03-06

    Applicant: BASF AG

    Inventor： WISSEROTH KARL ,  REUTER LOTHAR ,  TRIESCHMANN HANS-GECRG

    IPC: C08F8/06

    Abstract: Linear polyethylene of molecular weight 5,000 to 50,000 is treated in melted form at temperatures between 160 DEG and 280 DEG C., with molecular oxygen or mixtures of nitrogen and oxygen, such as air, whereby polyethylene of branched structure is produced. The linear polyethylene used may be obtained by thermal degradation of a linear polyethylene of higher molecular weight, e.g. by heating linear polyethylene of molecular weight 430,000 at 350 DEG to 420 DEG C. under nitrogen. The products find application as film.

    30.
    发明专利
    未知

    公开(公告)号：DE1720296A1

    公开(公告)日：1974-05-30

    申请号：DE1720296

    申请日：1967-08-29

    Applicant: BASF AG

    Inventor： TRIESCHMANN HANS-GEORG PROF DR ,  ZEITLER GERHARD DR ,  REUTER LOTHAR ,  DICKHAEUSER HEINER DR ,  PFANNMUELLER HELMUT DR

    IPC: C08F8/20 ,  C08F27/03

    Abstract: 1,228,976. Chlorinating polyethylene. BADISCHE ANILIN- & SODA-FABRIK A.G. 28 Aug., 1968 [29 Aug., 1967], No. 41122/68. Heading C3P. Polyethylene is chlorinated in a continuous process in which finely particled polyethylene is treated with chlorine in a chlorohydrocarbon whose boiling point is in the range from 30‹ to 90‹ C., the process comprising continuously introducing a high pressure polyethylene in the form of particles having a diameter of from 2 to 6 mm., a chlorohydrocarbon and chlorine into a reaction zone which contains solid polyethylene and a solution of from 1 to 20% by weight with respect to the solution of chlorinated polyethylene in the chlorohydrocarbon, continuously withdrawing from the reaction zone a fraction of the solution which is equivalent in amount to the amount of constituents being continuously introduced, and isolating chlorinated polyethylene from the solution withdrawn. Suitable chlorohydrocarbons are carbon tetrachloride, chloroform and trichloroethane.

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