中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

62 records (took 0.021 seconds)

    23.
    发明专利
    未知

    公开(公告)号：NO128665B

    公开(公告)日：1973-12-27

    申请号：NO511468

    申请日：1968-12-20

    Applicant: HOECHST AG

    Inventor： ROESCH G ,  SMERZ O ,  SCHINZEL E

    IPC: D06L3/12 ,  D06L4/65

    Abstract: 1,247,895. Brightening synthetic fibres. FARBWERKE HOECHST A.G. 19 Dec., 1968 [29 Dec., 1967], No. 60419/68. Heading D1P. [Also in Division B1] Fibrous materials consisting at least partially of synthetic fibrous materials are optically brightened by treating them with an aqueous dispersion of a mixture consisting essentially of a compound having the formula in which R and R 1 are hydrogen atoms, carboxy groups or carboxy groups esterified with alcohols containing 1-4 carbon atoms, and a compound having the formula in which X is a cyano group, carboxy group or carboxy group esterified with an alchol containing 1-4 carbon atoms and R 1 and R 2 are hydrogen atoms or alkyl groups containing 1-4 carbon atoms or together form an alkylene group containing 3 or 4 carbon atoms. The treatment may be carried out by an exhaustion method at 80‹-140‹C with or without the use of carriers, e.g. benzoic acid methyl ester, or by a method in which the fibrous material is immersed in a bath containing the brightening dispersion, squeezed to a moisture content of 20-100% and heated at 140‹-240‹C. The dispersion may contain 0.1-10 parts by weight of the compound II for each part by weight of compound I. Dispersible products may be produced by grinding using ball mills, colloid mills, bead mills or dispersion kneaders. The dispersion may also contain dispersing and stabilizing agents, e.g. oxyethylated nonylphenol, di (methoxy methyl)-anisole, partially hydrolysed polyvinyl acetates having different chain length and different residual content of polyvinyl acetate and a condensation product of phenol and 4 mols or formaldehyde methylated by means of dimethyl sulphate, and sodium chlorite. Fabrics containing polyester, polyamide or polyacrylonitrile fibres including fabrics comprising polyester and cotton fabrics may be treated.

    24.
    发明专利
    未知

    公开(公告)号：DK124548B

    公开(公告)日：1972-10-30

    申请号：DK249969

    申请日：1969-05-07

    Applicant: HOECHST AG

    Inventor： FRISCHKORN H ,  BEHRENBRUCH H ,  SCHINZEL E

    IPC: C07D263/62 ,  C07D263/64 ,  D06L3/12 ,  D06L4/636 ,  C07D85/48

    Abstract: The invention comprises benzoxazoles of the formula in which R1 and R2, which may be identical or different, denote hydrogen or halogen atoms or alkyl or phenyl groups or together form an isocyclic ring of 2-5 carbon atoms. The benzoxazoles may be prepared by reacting 1 mol. of naphthalene - 1,4 - dicarboxylic acid dichloride with 2 mols. of o -aminophenol or an appropriately substituted o -aminophenol to yield a diamide of the formula which is then subjected to ring-closure by simple heating or by heating in a solvent in the presence of a catalyst, e.g. zinc chloride. Alternatively, a benzoxazole may be produced directly by heating 1 mol. of naphthalene-1,4-dicarboxylic acid with 2 mols. of an o -aminophenol either in an organic solvent in the presence of an acid catalyst, e.g. boric acid, or to 120-200 DEG C. in polyphosphoric acid. Specified o -aminophenols which may be used include o -aminophenol, 3 - amino - 4 - hydroxy - 1 - methylbenzene, 5 - amino - 4 - hydroxy - 1,2 - dimethyl - benzene, 3 - amino - 4 - hydroxy - 1 - tert. - butylbenzene, 5,6,7,8 - tetrahydro - 1 - amino - 2 - naphthol, 5 - amino - 6 - hydroxy - hydrindene, 3 - amino - 4 - hydroxydiphenyl 5 - chloro - 2 - aminophenol and 4,6 - dichloro-2-amino-phenol. Examples are given. The products are useful as optical brighteners (see Divisions C3 and D1).ALSO:As optical brighteners for shaped structures of synthetic materials, use is made of benzoxazoles of the formula in which R1 and R2, which may be identical or different, denote hydrogen or halogen atoms or alkyl or phenyl groups or together form an isocyclic ring of 2-5 carbon atoms (see Division C2). Specified materials which may be treated are fibrous materials, films, foils and ribbons of polyamides of the polycaprolactam or nylon type, polyacrylonitrile, acetylcellulose, polyvinyl chloride, polyethylene, polypropylene, linear polyesters, e.g. polyethylene terephthalate, and polyacetals, which may be homo- or copolymers of formaldehyde or trioxane, some of which are specified. The brighteners may be applied before or during the production of the synthetic materials or they may be applied to the finished product, suitably in an organic solvent or in aqueous suspension. They may be used in association with oxidizing or reducing agents or detergents. Examples are given.ALSO:As optical brighteners for shaped structures of synthetic materials, use is made of benzoxazoles of the formula in which R1 and R2, which may be identical or different, denote hydrogen or halogen atoms or alkyl or phenyl groups or together form an isocyclic ring of 2-5 carbon atoms (see Division C2). Specified materials which may be treated are fibrous materials, films, foils and ribbons of polyamides of the polycaprolactam or nylon type, polyacrylonitrile, acetylcellulose, polyvinyl chloride, polyethylene, polypropylene, linear polyesters, e.g. polyethylene terephthalate, and polyacetals, which may be homo- or co-polymers of formaldehyde or trioxane, some of which are specified. The brighteners may be applied in an organic solvent or in aqueous suspension. They may be used in association with oxidizing or reducing agents or detergents. Examples are given.

Patent Agency Ranking