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    Production of moulded articles
    24.
    发明专利
    Production of moulded articles 未知

    公开(公告)号：GB1017494A

    公开(公告)日：1966-01-19

    申请号：GB4093862

    申请日：1962-10-30

    Applicant: BASF AG

    Inventor： DAUMILLER GUENTHER ,  BECHT GUENTER ,  SCHLEMMER LOTHAR

    IPC: B29C39/00 ,  B29C39/38 ,  C08G69/18

    Abstract: A process for the polymerization of lactams having seven or more ring members with simultaneous moulding of the resultant polymer, wherein the lactams are polymerized in hollow moulds by heating said moulds to the polymerization temperature of the lactams, the reaction taking place in the presence of alkaline catalysts comprises melting the lactam at temperatures below polymerization temperature and then introducing the melt together with the alkaline catalyst into the hollow mould by means of conveying equipment. Specified lactams are e -caprolactam, oenantholactam, caprylolactam and laurolactam. Specified catalysts are the alkali metals and hydroxides, carbonates, alcoholates and lactamates thereof. Specified activators are carboxylic acid halides and esters, lactones, inorganic acid halides and esters, substituted ureas, urethanes and guanidines, sulphonic acid halides and esters, phosphoric acid halides and esters, isocyanates, carbodiimides and ketones. The example describes the polymerization of e -caprolactam in an injection cylinder in the presence of potassium and 1 : 6-bis-(caprolactam-N-carbamido)-hexane.

    Tyre-cord filaments from base-polymerised lactams
    25.
    发明专利
    Tyre-cord filaments from base-polymerised lactams 未知

    公开(公告)号：GB969989A

    公开(公告)日：1964-09-16

    申请号：GB2774362

    申请日：1962-07-19

    Applicant: BASF AG

    Inventor： STEINHOFER ADOLF ,  BECHT GUENTER ,  DACHS KARL ,  WILHELM HANS

    IPC: B60C9/00 ,  C08G69/18 ,  D01F6/60

    Abstract: Heat-resistant tyre-cord filaments are made by melt spinning base-polymerized lactams from which monomers, oligomers and water-soluble alkaline catalysts may have been solvent-extracted with water or methanol. Alternatively the spinning of the polymerized lactam may follow immediately after its having been polymerized. Suitable lactams comprise all lactams of o -aminocarboxylic acids with rings of more than six members which can be converted into polyamides by means of alkaline reaction initiators, e.g. caprolactam, o-nantholactam, caprylolactam, o -aminopelargonolactam, o -aminocaproyllactam, o -aminoundecanolactam or laurolactam. The bases used for the initiation and continuation of the polymerization may be alkali metals, alkali metal carbonates, alkali metal amides or alkali metal lactams. In an example, a caprolactam containing 0.4% of sodium and a caprolactam containing 3% of pyrrolidone-n-carboxylic acid anilide are fed at the same rate at 100 DEG C. to an extruder heated in zones from 140 to 270 DEG C,, mixed, polymerized and melt spun. The filaments thus obtained have a Fikentscher K-value of 74 and contain 9.6% of water-extractable components. They may be cold or hot drawn either before or after the extraction of the water-soluble components. In the other example 1,500 parts of caprolactam containing 17 parts of potassium and 3,414 parts of caprolactam containing 76 parts of bis-caprolactam-n-carboxylic acid hexamethylene-diamine-1.6 are mixed and polymerized to form a polycaprolactam having a K-value of 127 and a melting range of 215-220 DEG C. The polymer is found to soften less with increase in temperature up to 190 DEG C. than nylon 6.6 having a melting range of 250-255 DEG C. Specification 919,246 is referred to.

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