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    CONTINUOUS MANUFACTURE OF POLYBUTYLENE TEREPHTHALATES
    5.
    发明专利
    CONTINUOUS MANUFACTURE OF POLYBUTYLENE TEREPHTHALATES 未知

    公开(公告)号：CA1050694A

    公开(公告)日：1979-03-13

    申请号：CA248377

    申请日：1976-03-17

    Applicant: BASF AG

    Inventor： STREHLER HUGO ,  BEER LUDWIG ,  HEIL EDUARD ,  URBANEK FRIEDRICH ,  FISCHER HERMANN

    IPC: C08G63/00 ,  C08G63/78 ,  C08G63/85 ,  C08G63/18 ,  C08G63/24

    Abstract: A process for the continuous manufacture of linear, high molecular weight, polybutylene terephthalates, in which dimethyl terephthalate is trans-esterified with 1,4-butanediol, if desired in the presence of up to 40 mole% of other starting materials which form linear polyesters, in the molar ratio of from 1:1.2 to 1:1.5, in a plurality of successive stages at temperatures rising from 160 to 230.degree.C, the mixture thus obtained is passed, at from 230 to 270.degree.C and from 2 mm Hg to 20 mm Hg, upward through a bundle of stationary heated tubes, and immediately thereafter through a hold tank, with the proviso that the volume of the hold tank is at least 1/4 and at most 2.5 times the volume of the tube bundle and the mean residence time in the tube bundle and hold tank together is from 10 to 60 minutes, and the precondensate thus obtained is polycondensed at from 240 to 260.degree.C and from 0.1 to 2 mm Hg, with continuous formation of thin films. The polybutylene terephthalates manufactured by the above process may be used for the manufacture of products such as fibers, films, sheeting and injection moldings.

    Improved Photopolymerizable Compositions and their use
    7.
    发明专利
    Improved Photopolymerizable Compositions and their use 未知

    公开(公告)号：GB1154872A

    公开(公告)日：1969-06-11

    申请号：GB3996766

    申请日：1966-09-07

    Applicant: BASF AG

    Inventor： HENKLER HERBERT ,  WILHELM HANS ,  FLOSS JOSEF GEORG ,  STREHLER HUGO ,  BRODT RUDOLF

    IPC: G03F7/031 ,  G03F7/037

    Abstract: 1,154,872. Photo-polymerizable materials. BADISHE ANILIN & SODA-FABRIK A. G. Sept. 7, 1966 [Sept. 8, 1965], No. 39967/66. Heading G2C. [Also in Division C3] Printing reliefs are prepared by exposing a plate, film or sheet of a photo-polymerizable composition to the action of actinic light, through a negative or positive image-bearing transparency, and removing in the desired depth the non-polymerized (non exposed) areas by means of a suitable solvent, said photo-polymerizable composition comprising a mixture of 50 - 90% by weight of a soluble linear synthetic polyamide containing as an integral part of the polymer chain recurring amido groups and 10 - 50% by weight of at least one addition polymerizable monomer containing at least two non-conjugated ethylenic double bonds or a mixture of such monomer with a monomer containing only one ethylenic double bond (said monomer or monomers being compatible to the extent of at least 30% by weight of the polyamidemonomer mixture with said polyamide), and 0À05 - 8% by weight of the polyamide/monomer mixture of at least one compatible carboxylic anhydride dispersed in the polyamide - monomer mixture. The compositions may also contain 0À01 - 10% by weight of the polyamide/monomer mixture of a photo-polymerisation initiator. The plate, film or sheet may be attached to a support, e.g. of metal, wood, paper or plastics material. The polyamide is preferably a copolymer of a lactam and/or nylon salt. Suitable poly-unsaturated monomers include alkylene - bis (meth) acrylamides, poly (meth) acrylyl derivatives of polyamines, (meth) acrylate esters of polyhydric alcohols, urethane and urea compounds obtained by reacting a diol mono (meth) acrylate or a mono - (meth) acrylamide with a diisocyanate, and heterocyclic compounds such as 1, 35 - triacryloyl - hexahydrotriazine- 1, 3, 5 and triallyl cyanurate. Suitable monoethylenic monomers include amides of (meth) acrylic, maleic and itaconic acid, styrene, mono- (meth) acrylate esters, N-vinyl-carbazole, N-vinyl pyrrolidone, N-vinyl-imides, vinyl acetate or propionate, dimethyl maleate and N - vinyl caprolactam. The anhydride component may be an aliphatic, cycloaliphatic or aromatic anhydride; polymeric anhydrides may also be used. Initiators which may be used include vicinal dicarbonyl compounds, α-carbonylalcohols, acyloin ethers, azonitriles, and polynuclear quinones. A thermal polymerization inhibitor, e.g. hydroquinone, p-methoxyphenol or di-t-butyl-p-cresol, may also be present. The photo-polymerization process is suitable for relief printing, indirect relief printing, dry offset printing and autotype intaglio printing.

    Production of pure caprolactam
    8.
    发明专利
    Production of pure caprolactam 未知

    公开(公告)号：GB1123805A

    公开(公告)日：1968-08-14

    申请号：GB4581965

    申请日：1965-10-29

    Applicant: BASF AG

    Inventor： PETRI NORBERT ,  STREHLER HUGO

    IPC: C07D201/04

    Abstract: A process for preparing caprolactam by the catalytic rearrangement of cyclohexanone oxime in contact with solid catalysts at elevated temperature and in the presence or absence of an inert gas, is characterized in that the gas mixture leaving the reaction chamber is quenched by liquid caprolactam, and the subsequent condensation of caprolactam is effected in a column equipped with baffles, a low boiling liquid being added at the top of the column. Reaction is conducted at 210-450 DEG C., at a pressure from 10 mm./Hg up to 1 at. gauge. Suitable catalysts are phosphoric or boric acids, heteropolyacids, alkali metal bisulphates, or mixtures thereof; they may be incorporated on a carrier, e.g. alumina (which may be calcined), silica gel or TiO2. Steam is a suitable inert gas. Specified low-boiling liquids are water, C1- 4 alkanols, C3- 5 dialkylketones, C5- 7 alkanes or benzene. The temperature difference between the gas leaving the reaction chamber and the caprolactam should be at least 10 DEG C., and the column should contain sufficient baffles to prevent loss of caprolactam vapour.

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