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    Production of Magnetic Recording Media
    13.
    发明专利
    Production of Magnetic Recording Media 未知

    公开(公告)号：GB1167527A

    公开(公告)日：1969-10-15

    申请号：GB5062466

    申请日：1966-11-11

    Applicant: BASF AG

    Inventor： WERST GERHARD ,  WILHELM HANS ,  BECHT GUENTER ,  UHL KARL ,  WAGNER HERBERT ,  SENKPIEL WERNER ,  SCHNELL GEORG ,  HARTMANN JOB-WERNER

    IPC: C08L77/00 ,  C09D5/23 ,  G11B5/702

    Abstract: 1,167,527. Polyamide-phenoplast compositions. BADISCHE ANILIN- & SODAFABRIK A.G. 11 Nov., 1966 [13 Nov., 1965], No. 50624/66. Heading C3R. [Also in Division H1] A binder for securing ferromagnetic particles to a substrate (see Division H1) comprises a mixture of (I) 60 to 99% by weight of a copolyamide of (a) 20 to 60% by weight of at least one lactam having more than six ring members and (b) 80 to 40% by weight of a mixture of at least one dicarboxylic acid having 6 to 20 carbon atoms, the latter mixture having at least one aliphatic dicarboxylic acid or diamine of 6 to 20 carbon atoms and represented by the formula in which Z denotes -CH 2 NH 2 or -COOH, R is an alkyl radical having at least 2 carbon atoms, R 2 is hydrogen or an alkyl radical having at least 2 carbon atoms and x and y each denote an integer from 1 to 5, and/or p,p 1 - diamino dicyclohexyl methane, the copolyamide being soluble in an organic solvent, and ((II) 40 to 1% by weight of a reaction product of formaldehyde and an aromatic compound having a phenolic hydroxy group and suitable for the formation of a phenolic resin. Numerous suitable lactams or corresponding amino acids are mentioned. Lists are given of compounds of the above general formula and of other C 6-20 dicarboxylic acids and diamines which may contain aliphatic or aromatic ring systems. The phenoplasts may be derived from phenol, cresols or naphthols and may be modified by conventional additives; in examples, the phenoplast comprises a polyester of 1 mole of trimethylol propane and 0.8 mole of adipic acid as modifier. Various solvents and optional additives are mentioned.

    Production of amorphous polyamides
    14.
    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.

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