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    Production of polyethers
    13.
    发明专利
    Production of polyethers 未知

    公开(公告)号：GB1125386A

    公开(公告)日：1968-08-28

    申请号：GB4695465

    申请日：1965-11-05

    Applicant: BASF AG

    Inventor： GEHM ROBERT ,  ADAM KARL

    IPC: C08G2/00 ,  C08G4/00 ,  C08G18/48 ,  C08G65/06 ,  C08G65/16 ,  C08G65/18

    Abstract: 1,125,386. Hexamethylene oxide and polymers therefrom. BADISCHE ANILIN- & SODAFABKIK A.G. 5 Nov., 1965 [6 Nov., 1964], No. 46954/65. Heading C2C. [Also in Division C3] Polymers and copolymers of hexamethylene oxide are made by polymerizing hexamethylene oxide, with or without other comonomers, in the presence of one or more Friedel-Crafts catalysts or Lewis acids in an amount of from 0À01-10 mole per cent with reference to the monomer(s) at from about - 40‹ to 150‹ C. in substance or in the presence of inert solvents. Comonomers to be used are cyclic ethers, e.g. ethylene, propylene and styrene oxides, epichlorhydrin, oxacyclobutane, di- (chloromethyl)-oxacyclobutane, tetrahydrofuran and allyl glycidyl ether, and cyclic acetals, e.g. dioxolane, trioxane, butanediolformal, and diethylene glycolformal. There may also be present in the reaction mixture regulators containing active hydrogen, such as alcohols, glycols, amines, mercaptans and water. The examples describe the preparation of polymers and copolymers from hexamethylene oxide alone and with epichlorhydrin, ethylene oxide alone and with epichlorhydrin and ethylene oxide with epichlorhydrin and butane diol-(1,4). Hexamethylene oxide (oxacycloheptane) is made by the action of potassium hydroxide on hexamethylene bromohydrin and forms an addition compound with boron trifluoride.

    Process for the production of highly elastic polyurethane articles
    14.
    发明专利
    Process for the production of highly elastic polyurethane articles 未知

    公开(公告)号：GB1079708A

    公开(公告)日：1967-08-16

    申请号：GB4933664

    申请日：1964-12-04

    Applicant: BASF AG

    Inventor： KUNDE JOACHIM ,  GEHM ROBERT ,  WEISSAUER HERMANN ,  WELLENREUTHER GERHARD

    IPC: C08G18/10

    Abstract: Highly elastic polyurethane articles are made by reacting, in an inert polar solvent, substantially linear isocyanate modified polyhydroxy compounds of M.W. from about 750 to 6000 and having terminal -NCO groups with dihydrazino compounds of cyclic diazines containing at least two reactive hydrogen atoms and moulding or applying to a substrate while removing the solvent. Hydrazino compounds specified are:-2,4-dihydrazino-6-methyl-m-diazine; 2, 4 - dihydrazino - 5, 6 - tetramethylene-m-diazine; 2,4 - dihydrazino - 6 - benzyl - m-diazine; 2, 4 - dihydrazino - 5 - methyl - 6-phenyl - m - diazine; 2, 4 - dihydrazinoquinazoline; 2, 3 - dihydrazinoquinoxaline and 1, 4-dihydrazinophthalazine. The polar solvent may be dimethyl formamide, dimethyl acetamide, tetramethylenesulphone or tetramethyl urea.

    Improvements in the bonding of polyamides to rubber
    20.
    发明专利
    Improvements in the bonding of polyamides to rubber 未知

    公开(公告)号：GB843377A

    公开(公告)日：1960-08-04

    申请号：GB1779258

    申请日：1958-06-04

    Applicant: BASF AG

    Inventor： CANTZLER ERIKA ,  DANIEL WALTER ,  GEHM ROBERT ,  HOELSCHER FRIEDRICH ,  RIEDER FRITZ ,  SCHUSTER CURT

    IPC: C08J5/06

    Abstract: An adhesive for bonding polyamides to rubber comprises a mixture of 80 to 40% (all percentages by weight) of a 10 to 20% aqueous solution of a resorcinol-formaldehyde condensate at a molar ratio of formaldehyde to resorcinol of from 1:2 to 2:1 and p 20 to 60% of a 20 to 60% aqueous dispersion of a copolymer derived from 30 to 70% butadiene, 67 to 20% styrene and 3 to 10% of a N-vinyl-imidazole (including substituted derivatives) or a N-vinylcarbazole (including substituted derivatives). For use with a polyamide fabric, the fabric may be soaked or impregnated with the adhesive mixture, allowed to dry and then pressed on to the rubber at 150 DEG C. with a pressure of about 20 kg/cm2. If foils of polyamides are used, they are preferably pre-treated with an aqueous solution of a resorcinol-formaldehyde condensate. Example (1) describes a conventional preparation of a butadiene-styrene-N vinylimidazole copolymer and also the preparation of a suitable resorcinol-formaldehyde condensate. A finely meshed fabric of polyamide fibres is bonded with a mixture of these two components on to an unvulcanised natural rubber. In another example N-vinyl-benzimidazole replaces N-vinylimidazole.

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