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    Production of structural members based on metal and polyamides
    2.
    发明专利
    Production of structural members based on metal and polyamides 未知

    公开(公告)号：GB980780A

    公开(公告)日：1965-01-20

    申请号：GB2905663

    申请日：1963-07-23

    Applicant: BASF AG

    Inventor： RAICHLE LUDWIG ,  SCHELLENBERG ROLF ,  BITTERMANN HERBERT ,  STRICKLE ERICH

    IPC: B22F3/26 ,  B29C39/00 ,  B29C39/10 ,  B29C70/70 ,  B32B15/08 ,  C08G69/18

    Abstract: In a process for the production of structural members based on metal and polyamide, the pores and the surface of a porous shaped article of sintered metal are completely or partly filled up and covered with a polymerization mixture comprising a lactam, an alkaline polymerization catalyst and a catalyst activator and polymerization effected. The polymerization may be effected in a mould. Specified sintered metals are steel and steel alloys, e.g. chromium nickel steel, bronze, and brass alloys. Specified lactams are pyrrolidone, piperidone, caprolactam, capryllactam, oenantholactam, capric lactam, laurolactam, E-methyl-E-caprolactam, Z - ethyl - Z - oenantholactam and methylene-bis-caprolactam. Specified catalysts are the alkali and alkaline earth metals and basic compounds thereof. Specified activators are substituted ureas, guanidines, urethanes and N-cyanolactams. The examples describe the polymerization of caprolactam in a mould in the presence of sodium and bis-(caprolactam carboxylic acid)hexamethylene diamide, the sintered metal being:-(1) two chromium-nickel-steel plates and (2) a metal plate. Composite objects which may be made by the process of the invention are bearings, gears, bushings, slides, piston rings, commutator discs and shafts and armature spirals and shafts. Specifications 900,150 and 900,151 are referred

    Production of rods and other sections of polyamides
    7.
    发明专利
    Production of rods and other sections of polyamides 未知

    公开(公告)号：GB1125403A

    公开(公告)日：1968-08-28

    申请号：GB77666

    申请日：1966-01-07

    Applicant: BASF AG

    Inventor： RAICHLE LUDWIG ,  JUNG HANS ,  SCHELLENBERG ROLF ,  LINGE HERMANN

    IPC: B29C47/00 ,  C08G69/18

    Abstract: 1,125,403. Extruding polyamide sections. BADISCHE ANILIN- & SODA-FABRIK A.G. 7 Jan., 1966 [9 Jan., 1965], No. 776/66. Heading B5A. Polyamide rods 8 of various cross-sections are formed by ram extrusion of a supercooled melt of the resin through a cooled die 7. The term " supercooled melt " is defined as the state of the melt when at a temperature of 5-10‹ C. below its melting-point after polymerization, but before crystallization sets in. The extrusion process comprises two stages; in the first a mixture 2 of a lactam, catalyst and activator is homogenized by means of a plate 1 within a mixing vessel heated to the polymerization temperature, and in the second the mixing vessel is placed within barrel 6 of the extruder where anionic polymerization takes place and the bottom 3, Fig. 1, or 10, Fig. 2, of the vessel, which is movable, is acted upon by a ram 11. The preferred range of polymerization temperatures is 100-140‹ C. and that for extrusion is 180-210‹ C. According to the invention the rods have a monomer content of less than 1À2% by weight and a water absorption of less than 50% by weight and the rods may be stretched by rollers or a sizing die to increase their strength. Gearwheels may be made from the rods. Numerous lactams, activators and catalysts are listed as well as conventional additives. An example is given.

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