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    Process for preparing a polypropylene wax
    4.
    发明专利
    Process for preparing a polypropylene wax 未知

    公开(公告)号：AU670105B2

    公开(公告)日：1996-07-04

    申请号：AU4446093

    申请日：1993-08-06

    Applicant: HOECHST AG

    Inventor： HOHNER GERD

    IPC: C08F4/656 ,  C08F4/58 ,  C08F4/60 ,  C08F4/642 ,  C08F4/646 ,  C08F10/00 ,  C08F10/06 ,  C08F110/06

    Abstract: Polypropylene waxes having good crystallinity and good processing properties can be obtained by solution polymerisation at a temperature above 110 DEG C if the polymerisation is carried out in the presence of a catalyst system prepared from an alkoxymagnesium compound, a tetravalent titanium compound, a silicon compound and an organoaluminium compound. The polypropylene waxes prepared by the process are hard, tough, colourless, non-tacky, thermostable, readily grindable products having an isotacticity, determined by IR spectroscopy, of greater than 70% and a melt viscosity of from 50 to 4000 mPa.s, measured at 170 DEG C. The waxes are suitable, for example, as base materials for pigment preparation, for scratchproofing of printing inks, for matting surface coating materials (paints, lacquers, enamels, varnishes), as assistants (auxiliaries) in the processing of plastics, for example as lubricants and release agents, as a formulation component in phototoners, and as melting point elevators.

    PROCESS FOR THE CONTINUOUS PREPARATION OF HIGH-MOLECULAR-WEIGHT CARBOXYLIC ACIDS
    8.
    发明专利
    PROCESS FOR THE CONTINUOUS PREPARATION OF HIGH-MOLECULAR-WEIGHT CARBOXYLIC ACIDS 未知

    公开(公告)号：CA2128648A1

    公开(公告)日：1995-01-24

    申请号：CA2128648

    申请日：1994-07-22

    Applicant: HOECHST AG

    Inventor： HEINRICHS FRANZ-LEO ,  HOHNER GERD ,  LUKASCH ANTON ,  PETZ KARL

    IPC: C07C51/25 ,  C07C51/305 ,  C07C53/126 ,  C07C51/16 ,  C07C57/03

    Abstract: Process for the continuous preparation of relatively high-molecular-weight carboxylic acids The oxidation of olefins having from 16 to 70 carbon atoms by means of chromic/sulfuric acid in a single-stage or multistage process in at least one reactor having a narrow residence time spectrum enables the preparation of carboxylic acid mixtures. These can be processed with monoalcohols or polyols such as glycol, glycerol, trimethylolpropane, pentaerythritol or sorbitol to give esters and partial esters or mixtures of such esters. Reaction with basic oxides or metal hydroxides can be used to prepare the corresponding soaps of the carboxylic acids by direct reaction or by trans-precipitation. Reaction with amines or aminoalcohols gives the amides, amidoesters and aminoesters. These products have a pale colour, good thermal stability and a wide range of applications.

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