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    2.
    发明专利
    未知

    公开(公告)号：DE1067587B

    公开(公告)日：1959-10-22

    申请号：DEB0045396

    申请日：1957-07-20

    Applicant: BASF AG

    Inventor： SCHWARTZ DR ERICH ,  PAUL DR MANFRIED

    IPC: B29C39/00 ,  C08G69/18

    Abstract: In a process for the production of shaped articles from polyamides, a lactam with at least seven ring members is reacted with an alkali or alkaline earth metal or with an alkaline-reacting compound of an alkali or alkaline earth metal, and, after removal of water from the reaction medium and addition of an acid halide, anhydride, ester, or nitrile, the polymerization is initiated at a temperature which is above the melting point of the monomeric lactam and is carried out in a mould or on a support at a temperature which is at most about 40 DEG C. above the softening point of the polyamide. Specified lactams are E-caprolactam, oenanthic lactam, caprylic lactam and lauric lactam and their C-substitution products. The polymerization may be effected in the presence of fillers e.g. iron, aluminium or copper powder, finely divided molybdenum oxide, titanium dioxide, silica gel, dyestuffs, carbon black and glass fibres or fabrics. The examples describe the preparation of polyamides from E-caprolactam and/or caprylic lactam in the presence of potassium hydroxide, potassium methylate or sodium and benzoyl chloride, palmitic acid chloride, terephthaloyl chloride or triphenyl phosphate, methylene-bis-caprolactam being specified as a cross-linking agent in one example. Fillers specified in the examples are aluminium powder, copper powder, iron powder, glass fibres, glass fabrics and graphite.

    9.
    发明专利
    未知

    公开(公告)号：DE1142696B

    公开(公告)日：1963-01-24

    申请号：DEB0059650

    申请日：1960-10-06

    Applicant: BASF AG

    Inventor： ILLING DR GERHARD ,  SCHWARTZ DR ERICH ,  MERTES DR FRIEDRICH

    IPC: C08K3/32 ,  C08K5/098 ,  C08L77/00

    Abstract: In a process for the production of synthetic linear polyamides with stabilized melt viscosity, 0,001 to 1% by weight of an acid of phosphorus or a metal salt thereof and 0,01 to 2% by weight of an alkane monocarboxylic or alkane dicarboxylic acid or a salt thereof with a metal of Group I or II of the Periodic Table is added thereto prior to the shaping of the polyamide (the weight of the phosphorus acid component in the mixture being less than that of the carboxylic acid component). Specified phosphorus acid components are hypophosphorous, phosphorous, hypodiphosphoric, orthophosphoric, pyrophosphoric, hexametaphosphoric and metaphosphoric acid. Specified linear polyamides are polycaprolactam, polycaprylic lactam, polylauric lactam, polyhexamethylene adipamide, polyoctamethylene sebacamide, polyurethanes and polyureas. Specified alkane carboxylic acids are capric, palmitic, stearic, behenic, undecane dicarboxylic, acetic, caproic, oenanthic, succinic and adipic acid. In the examples:-(1) polycaprolactam is kneaded at 250 DEG to 260 DEG C. with disodium hydrogen phosphite pentahydrate, calcium stearate and di-t-butyl-p-cresol; (2) polycaprylic lactam is homogenized at 260 DEG to 280 DEG C. with calcium stearate and disodium hydrogen phosphite and (3) polyhexamethylene adipamide is kneaded with calcium stearate and disodium hydrogen phosphite.

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