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    Production of amorphous polyamides
    27.
    发明专利
    Production of amorphous polyamides 未知

    公开(公告)号：GB1112395A

    公开(公告)日：1968-05-01

    申请号：GB3766065

    申请日：1965-09-03

    Applicant: BASF AG

    Inventor： RAFF PAUL ,  SCHUSTER LUDWIG ,  DOERFEL HELMUT ,  BECHT GUENTER

    IPC: C08G69/26

    Abstract: Polyamides may be prepared by heating mixtures of and with dicarboxylic acids or esters or chlorides thereof. Acids specified are adipic, sebacic, decane dicarboxylic, suberic, terephthalic, cyclohexane dicarboxylic and pyridine dicarboxylic acids. Where the acid itself is used this may be in the form of its salt with the amine. The reaction may be carried out in the absence of oxygen at superatmospheric pressure, water being removed in the later stages by an inert gas stream, e.g. N2, or by application of a subatmospheric pressure. Where the acid ester is used the reaction may be in 2 stages. In the first stage the diamine and ester may be heated, optionally in a solvent, e.g. an alcohol or aromatic hydrocarbon to form a precondensate. In the second stage the precondensate solution may be heated to distil off the solvent and complete the polymerization. Heating in this stage may be above 200 DEG C. and under an inert atmosphere of subatmospheric pressure. Where the acid chloride is used the reaction may be carried out at a water/non-aqueous solvent interface, the diamine being dissolved in the former and the acid halide in the latter. Non-aqueous solvents specified are CCl4 and toluene. The reaction mixture may include a lactam, e.g. caprolactam, a chain terminator, e.g. a monocarboxylic acid or monoamine or an amide forming derivative of either, a thermal stabilizer, photostabilizer, optical brightener, filler and/or lubricant. The products may be used to make injection mouldings, sheets, rods, bristles, filaments and threads.

    Production of polylaurolactam
    29.
    发明专利
    Production of polylaurolactam 未知

    公开(公告)号：GB1077310A

    公开(公告)日：1967-07-26

    申请号：GB4268164

    申请日：1964-10-20

    Applicant: BASF AG

    Inventor： KUNDE JOACHIM ,  WILHELM HANS ,  METZGER HORST ,  DOERFEL HELMUT

    IPC: C08G69/16

    Abstract: Laurolactam is partially polymerized at 200-340 DEG C. and autogenous pressure in the presence of 10-300 mole per cent of water, the water is removed and the polymerization continued at 270-340 DEG C. Before polymerization the reactants may be freed of oxygen. 0.05-2 mole per cent of a chain terminator, e.g. acetic, propionic, butyric, benzoic or stearic acid or dodecylamine, may be added before or during polymerization. Other additives may be fillers, fibres, pigments and dyes. Both polymerization stages may be conducted under an inert atmosphere. The pressure of the first may be up to 73 atmospheres; that of the second atmospherics sub- or super-atmospheric. The water may be removed by releasing the pressure and heating. The products may be extruded as fibres directly from the bottom of the pressure vessel. They may be injection moulded, extruded, or fluidized bed coated to produce rods, gears, pipe, film, sheeting bristles or fibres.

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