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28 条记录 (耗时 0.012 秒)

    Cutting-off machines
    7.
    发明授权
    Cutting-off machines 失效
    切割机

    公开(公告)号：US3745713A

    公开(公告)日：1973-07-17

    申请号：US3745713D

    申请日：1971-06-23

    申请人： NOBEL BOZEL

    发明人： FABRE A

    IPC分类号： B24B27/06 ,  B24B7/00 ,  B24B9/00

    CPC分类号： B24B27/0608

    摘要： The invention deals with an improved machine for cutting off metal sheets. The improvement consists in the fact that a carriage, movable along a horizontal guiding rail and bearing an arm at the extremity of which is mounted a cutting-off disc rotated at high speed, is given simultaneously a continuous to-and-fro movement in the direction of cutting and an intermittent movement of translation in the direction of cutting brought into action by a depth guide for the cutting-off wheel, by means of a suitable transmission system. This improvement renders automatic the opration of the cuttingoff machine.

    摘要翻译： 本发明涉及一种用于切断金属片的改进机。

    Polymers and copolymers of acetals of allyl alcohol
    10.
    发明授权
    Polymers and copolymers of acetals of allyl alcohol 失效
    烯丙醇缩醛的聚合物和共聚物

    公开(公告)号：US3197447A

    公开(公告)日：1965-07-27

    申请号：US15211961

    申请日：1961-11-06

    申请人： NOBEL BOZEL

    发明人： PIERRE TALET

    IPC分类号： C08F8/28 ,  C08F20/00 ,  C09D157/00

    CPC分类号： C09D157/00 ,  C07C67/08 ,  C07C69/734 ,  C08F20/00

    摘要： The invention comprises compounds of formula: where a and b are CH2=CH-CH2-O-, and H, or combined to form O, the compounds being obtained by acetalization of an at least stoichiometric amount of allyl alcohol with glyoxal or glyoxylic acid. The reaction is preferably effected by heating the reactants, a substantial excess of allyl alcohol being used, in the presence of an acid catalyst; whilst removing water by azeotropic distillation. In examples glyoxal-tetra-allylacetal is made from glyoxal and the allylester-diallylacetal of glyoxylic acid from glyoxylic acid, the catalyst being sulphuric acid and the solvent benzene. The products may be polymerized or used as copolymers (see Divisions C3 and D1).ALSO:Compounds of formula: where a and b are CH2=CH-CH2-O- and H, or together represent an oxygen radicle, are made by acetalising allyl alcohol with glyoxal or glyoxylic acid, and polymerized or copolymerised. Polymerization or copolymerization may be effected at room temperature, or above, and with or without catalysts. Polymer formation may be carried out in bulk, in solution or in emulsion and oxygen may be present. Control over the extent of polymerisation may be obtained because the allyl radicles take part in the polymerisation successively and any free double bonds remaining after the initial stage may, by more energetic treatment e.g. at a higher temperature or by the use of a catalyst, be cross-linked. Organic peroxides and hydroperoxides are preferred catalysts e.g. tertiary butyl, lauryl, benzoyl and cyclohexanone peroxides, tertiary butyl perbenzoate and tertiary butyl hydroperoxide. Numerous examples are provided of the preparation of various conventional methods, of polymers and copolymers from glyoxal-tetraallylacetal and allyl ester-diallylacetal of glyoxylic acid. Substances used for copolymer formation are ethyl, methyl and butyl acrylates and methacrylates and vinyl acetate and styrene. The products are used in film forming compositions e.g. in paints, varnishes and lacquers. Stoving may be required. Tin tetrachloride and aqueous ammonia and potassium persulphates are other polymerisation catalysts used in the examples the persulphates illustrating preparations by emulsion copolymerisation.ALSO:Cotton fabrics are stiffened by the formation thereon of a polymer or copolymer of a compound of formula where a and b are -O-CH2-CH = CH2 and H, or together with the C atom to which they are attached from the C = O radicle. In examples cotton is impregnated with aqueous emulsions comprising, as catalyst, potassium, persulphate, and glyoxal-tetra-allylacetal and 6 sulphonated lauryl alcohol, a condensation product of oleyl alcohol and ethylene oxide, ethyl acrylate and methyl methacrylate and 7 ethyl acrylate, methyl methacrylate and acrylamide, with or without formal, the material being squeezed, dried at 80 DEG C., and stored at 130 DEG C.