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    2.
    发明专利
    未知

    公开(公告)号：DE1816395A1

    公开(公告)日：1970-06-25

    申请号：DE1816395

    申请日：1968-12-21

    Applicant: BASF AG

    Inventor： ECKERT DR GUENTER ,  HARTMANN DR HEINRICH ,  MARX DR MATTHIAS ,  WUERTELE DR LOTHAR

    IPC: D06N3/00 ,  C08F246/00 ,  C14C11/00 ,  D06N3/04

    Abstract: 1286553 Crosslinking polymers on leather or synthetic leather BADISCHE ANILIN- & SODA-FABRIK AG 22 Dec 1969 [21 Dec 1968] 62282/69 Heading B2E [Also in Division C3] A process for dressing leather or synthetic leather substitute comprises applying to the surface of the leather or leather substitute (1) a solution or dispersion (aqueous or non- aqueous) of a copolymer carrying acetoacetate groups and/or cyano-acetate groups, and (2) one or more aldehydes and/or compounds capable of dissociating to give an aldehyde, as cross-linking agent; the major part of the crosslinking of the copolymer by means of the cross-linking agent occurring only after application of components (1) and (2) to said surface. Component (1) is suitably derived from a monomer of the formula where X is C 2 -C 10 alkylene or oxa alkylene, R is H or methyl and Y is acetyl or cyano, or from acetoacetates and cyanoacetates vinyl thioalcohols, e.g. vinyl thioglycol acetoacetate; these monomers are copolymerised with, for example, acrylic or methacrylic acid and alkyl and hydroxyalkyl esters thereof, vinyl esters of carboxylic acids, (meth)acrylonitrile, N- hydroxymethyl amides of (meth)acrylic acid and their alkyl ethers, (methyl)allylalcohol, vinyl chloride, vinylidene chloride, butadiene or mixtures thereof. Specified as component (2) are formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, glyoxal, acrolein, methacrolein, dimethylolurea and hexamethylenetetramine. The solutions or dispersions may optionally contain additives such as plasticisers, pigments, flow improvers and additional binding agents, e.g. phenolic resins, amino resins, alkyd resins, epoxide resins, acrylate resins or cellulose derivatives. To avoid a major amount of premature cross-linking, components (1) and (2) should be stored separately until required for use, except possibly when component (2) is not in free aldehyde form. The components are suitably applied to the leather or substitute by means of a two-component spray gun or a twocomponent casting machine.

    3.
    发明专利
    未知

    公开(公告)号：DE1907957A1

    公开(公告)日：1970-08-20

    申请号：DE1907957

    申请日：1969-02-18

    Applicant: BASF AG

    Inventor： HARTMANN DR HEINRICH ,  HARTMANN DR JOB-WERNER ,  WILHELM DR HANS ,  SCHNELL DR GEORG ,  KITTLER DR WOLFRAM ,  WERST DR GERHARD ,  BAUR DR REINHOLD

    IPC: C08G18/62 ,  C09D5/23 ,  G11B5/702 ,  H01F10/02

    Abstract: 1290834 Magnetic recording media BADISCHE ANILIN- & SODA-FABRIK AG 17 Feb 1970 [18 Feb 1969] 7488/70 Heading H1H In magnetic recording media comprising a non-magnetic support, e.g. tape or disc, bearing a dried or cured layer of magnetic particles dispersed in a binder, comprising a mixture of (A) a polyisocyanate (B) a OH-group-containing copolymer and (C) an organic solvent non- reactive to isocyanate groups, the polymer B is made by polymerizing, in an organic solvent, (1) 7-25 wt. per cent of an acrylic or methacrylic monoester of a C 2 -C 8 dihydric aliphatic alcohol; (2) 25-83 wt. per cent of an acrylic or methacrylic ester of a C 1 -C 8 monohydric aliphatic alcohol; (3) 10-50 wt. per cent vinylidene chloride. Up to 25 wt. per cent of further monoolefinically unsaturated monomers may be used in making the copolymer, provided that not more than 3À5% of these monomers, based on the total weight of monomers, contains groups reactive to isocyanate. The binder may be modified by addition of another copolymer of olefinically-unsaturated monomers in an amount less than B. Specified magnetic particles, are acicular or cubic γ-Fe 2 O 3 (0À1-2 Á), Fe, Co, alloys of Fe, Co, and/or Ni, chromium oxide and mixtures of iron oxides with or without other metal oxides. The proportion of magnetic particles to binder is suitably 2À4-4À5 : 1. In making the recording media, the coated and dried support may be pressed between rollers at 20-80‹ C., and tempered at 60-80‹ C. for 1-3 days. In examples, the magnetic particles are γ-Fe 2 O 3 and the binder components A and B are: (1) and (4) A-4,4 1 -diisocyanato-diphenyl methane; B - 1,4 - butanediol monoacrylate/n - butyl acrylate / acrylic acid / vinylidene chloride copolymer; (2) A-4,4 1 -diisocyanatodicyclohexylmethane; B- as (1); (3) A-4,4 1 -diisocyanato - diphenylmethane; B - 1,4 - butanediol monoacrylate / n - butyl acrylate / acrylonitrile/ vinylidene chloride copolymer. Binder (1) also contains vinyl chloride / acetate / alcohol copolymer, and binder (3) also contains vinyl chloride / diethyl maleate / dimethyl maleate copolymer.

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