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    Production of Magnetic Recording Media
    11.
    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 molding materials from polypropylene and polyisobutylene
    17.
    发明专利
    Production of molding materials from polypropylene and polyisobutylene 未知

    公开(公告)号：GB1096346A

    公开(公告)日：1967-12-29

    申请号：GB1693065

    申请日：1965-04-22

    Applicant: BASF AG

    Inventor： STEDEFEDER JOACHIM ,  SCHNELL GEORG

    IPC: C08F210/00

    Abstract: Moulding material consisting of 99.5 to 70% by weight of polypropylene and 0.5 to 3.0% by weight of polyisobutylene, is made by homopolymerizing propylene and isobutylene mixed together in the presence of a catalyst comprising an alkyl aluminium halide and a titanium halide. The molar ratio of halogen to aluminium in the alkyl aluminium supplied to the polymerization being from 1.1: to 1.9:1 and the molar ratio of aluminium to titanium being 10:1 to 1:3. The catalyst may be modified with complex-forming substances, and the polymerizable mix may include polymerization and molecular weight regulators. The polymers are recovered by known techniques.

    Magnetic recording media
    20.
    发明专利
    Magnetic recording media 未知

    公开(公告)号：GB1147518A

    公开(公告)日：1969-04-02

    申请号：GB3186766

    申请日：1966-07-15

    Applicant: BASF AG

    Inventor： SCHNELL GEORG ,  HARTMANN JOB-WERNER ,  BONITZ ECKHARD

    IPC: C09D5/23 ,  G11B5/702 ,  G11B5/725

    Abstract: 1147518 Magnetic compositions BADISCHE ANILIN- & SODA-FABRIK A G 15 July 1966 [17 July 1965] 31867/66 Index C3R 3 R22 R32 L4H C24 C13X C10 C11 C12 C25 C6X C5B2 C8P L5A L6G L4D C14A C16 L5X A magnetic recording medium comprises a flexible non-magnetic support with a coating thereon containing magnetic particles dispersed in a thermoplastic resinous binder togehter with 0À5-26% (b. w. of the particles) of a compound of formula R n SiX 4-n , where n is 1-3, R is a saturated or unsaturated aliphatic or aromatic hydrocarbon radical, and X is a halogen atom, or alkoxy, hydroxyl, or amine radical. Numerous examples are given where R is Me, Et, Pr, Bu, Ph, naphthyl, vinyl, dodecyl, octadecyl, octyl and mixtures thereof, and X is C1, (OBu), (OEt), (OH) and (NH 2 ). The compound may be added before, during, or after dispersion of the particles. The binder may be P.V.C., cellulose ester, polyurethane, polyamide, or polyester (examples given). The magnetic particles may be acicular γ-Fe 2 O 3 , and a layer 10Á thick may be produced, containing 0À5-5% of the particles.

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