中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

57 records (took 0.024 seconds)

    Improvements in the production of omega-lauric lactam
    3.
    发明专利
    Improvements in the production of omega-lauric lactam 未知

    公开(公告)号：GB876946A

    公开(公告)日：1961-09-06

    申请号：GB659960

    申请日：1960-02-25

    Applicant: BASF AG

    Inventor： SCHICKH OTTO VON ,  METZGER HORST

    Abstract: o -lauric lactam is obtained by allowing a hydroxylammonium salt to act on cyclododecanone in aqueous sulphuric acid with a sulphuric acid content of more than 70% by weight or fuming sulphuric acid with a sulphur trioxide content of at the most 50% by weight at a temperature between 90 and 150 DEG C., and diluting the rearrangement mixture with such an amount of water and/or ice that the concentration of sulphuric acid in the diluted mixture is at most 60% by weight. Generally the ratio by weight of cyclododecanone to sulphuric acid or oleum will be between 1:0.6 and 1:5, advantageously between 1:06 and 1:2. Hydroxylammonium with strong acids, preferably inorganic, e.g. hydrochloric or, preferably sulphuric are suitable. They are preferably used in at least the stoichiometric amount with respect to cyclododecane and preferably in an excess, e.g. of 1-25%. The process may be operated batchwise or continuously.

    Anionic polymerisation of lactams
    10.
    发明专利
    Anionic polymerisation of lactams 未知

    公开(公告)号：GB1043678A

    公开(公告)日：1966-09-21

    申请号：GB173464

    申请日：1964-01-15

    Applicant: BASF AG

    Inventor： GEHM ROBERT ,  STEINBRUNN GUSTAV ,  JENTZSCH WOLFGANG ,  WILHELM HANS ,  BAYERLEIN FREDERICH ,  SCHICKH OTTO VON

    IPC: C08G69/20

    Abstract: In a process for the anionic polymerization of lactams having 5 to 14 ring members, the polymerization activator used is a compound of the general formula where n is 1 or 2, R1 and R2 are each monovalen hydrocarbon radicals having one to seven carbon atoms or R1 and R2 joined together form a divalent radical, R3 is hydrogen or a hydrocarbon radical having one to eight carbon atoms and R, when n is 1 is an alkyl amine, arylamino or aralkylamino radical having one to fourteen carbon atoms, and, when n is 2 is a divalent radical having the formula -NH-R3-NH- where R4 is a divalent hydrocarbon radical having two to fifteen carbon atoms. Specified lactams are pyrrolidone, piperidone, e -caprolactam, capryllactam, oenanthiclactam, capriclactam, laurolactam, e -ethyl-e -caprolactam, #x-ethyl-#x-oenantholactam and methylenebis-caprolactam. Fillers, e.g. glass fibres, asbestos, graphite, gypsum, chalk, molybdenum sulphide, wood flour and fibres may be incorporated into the polymerization mixture. In Examples (1) to (6), e -caprolactam is polymerized in the presence of sodium caprolactam and: (1) benzimidazole-1-carboxylic anilide; (2) imidazole-1-carboxylic acid N : N1-diphenyl amide; (3) benzimidazole-1-carboxylic acid (N1-methyl) anilide; (4) 2-methylimidazoline-N(1)-carboxylic acid N : N1-diphenyl amide; (5) N : N - hexamethylene - bis - (carbamyldimethyl formamidine) and (6) (a) hexamethylene - bis - (N1 - carbamyl - 2 - methylimidazoli (b) hexamethylene-bis-(N-carbamyltriphenyl formamidine). In Example (7) pyrrolidone is polymerized in the presence of sodium methylate and imidazole-1-carboxylic diphenylamide.

Patent Agency Ranking