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公开(公告)号：SE7710652L
公开(公告)日：1978-03-26
申请号：SE7710652
申请日：1977-09-22
Applicant: BASF AG
Abstract: Thermoplastic nylons are stabilized with copper compounds and synergistic halides by incorporation of from 0.1 to 10% of a concentrate of nylon, copper bromide or iodide and calcium bromide, zinc bromide or magnesium bromide. The stabilized nylons may be thermoplastically processed to give semimanufactures or films.
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公开(公告)号：DK341375A
公开(公告)日：1976-01-30
申请号：DK341375
申请日：1975-07-28
Applicant: BASF AG
Inventor： DOERFEL H , SCHMIDT F , SCHUETTE W , CORDES C , SCHENK W
Abstract: Method of removing odorous formaldehyde from stabilized shaped polyoxymethylenes in which an inert gas is caused to flow over stabilized and shaped solid polyoxymethylenes at elevated temperatures not high enough to cause sticking or fusion of the polyoxymethylene, until substantially all of the volatile formaldehyde has been removed.
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Patent Agency Ranking
公开(公告)号：SE435724B
公开(公告)日：1984-10-15
申请号：SE7710652
申请日：1977-09-22
Applicant: BASF AG
Abstract: Thermoplastic nylons are stabilized with copper compounds and synergistic halides by incorporation of from 0.1 to 10% of a concentrate of nylon, copper bromide or iodide and calcium bromide, zinc bromide or magnesium bromide. The stabilized nylons may be thermoplastically processed to give semimanufactures or films.
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公开(公告)号：BR7506976A
公开(公告)日：1976-08-17
申请号：BR7506976
申请日：1975-10-24
Applicant: BASF AG
Inventor： JESERICH W , CORDES C , SEYDL W , WEISS H
Abstract: Process for the continuous manufacture of polymeric starting materials for high-grade transparent thin sheeting, wherein A. epsilon -CAPROLACTAM IS CONTINUOUSLY AGITATED IN A FIRST REACTION ZONE UNDER POLYAMIDE-FORMING CONDITIONS AT TEMPERATURES OF FROM 240 DEG TO 290 DEG C until at least 20% and preferably at least 35% of the epsilon -caprolactam has reacted, B. MAGNESIUM SILICATE HAVING A PARTICLE SIZE OF LESS THAN 30 mu M IS THEN ADDED TO THE MELT TO GIVE MAGNESIUM SILICATE CONCENTRATIONS IN THE REACTION MIXTURE OF FROM 0.0005 TO 0.5% AND PREFERABLY FROM 0.001 TO 0.
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公开(公告)号：BR7505517A
公开(公告)日：1976-08-03
申请号：BR7505517
申请日：1975-08-28
Applicant: BASF AG
Abstract: A process for continuous production of polyamides by continuous transport of a mixture of one or more lactams and from 1 to 15% and preferably from 3 to 8% of water and optionally other polyamide-forming compounds such as the salts of dicarboxylic acids and diamines or aminocarboxylic acids through a number of reaction zones under polyamide-forming conditions, said mixture of starting materials being heated in a first reaction zone to temperatures of from 210 DEG to 330 DEG C and preferably from 220 DEG to 280 DEG C, whereupon the polycondensation mixture is adiabatically vented in a further reaction zone and is then polymerized to completion in yet another reaction state to form high molecular weight polyamides. The process is characterized in that A. THE MIXTURE OF STARTING MATERIALS IS HEATED IN THE FIRST REACTION ZONE AT PRESSURES WHICH ARE ABOVE THE RESPECTIVE VAPOR PRESSURES OF THE STARTING MATERIALS AND PREVENT THE FORMATION OF A VAPOR PHASE, SAID HEATING BEING EFFECTED FOR FROM 5 MINUTES TO 2 HOURS AND PREFERABLY FROM 10 MINUTES TO 1 HOUR UNTIL A CONVERSION OF AT LEAST 70% AND PREFERABLY 80% HAS BEEN REACHED; B. THE POLYCONDENSATION MIXTURE IS VENTED IN THE SECOND ZONE TO PRESSURES OF FROM 1 TO 11 BARS AND PREFERABLY FROM 1 TO 6 BARS AND IS THEN IMMEDIATELY HEATED IN A THIRD REACTION ZONE, PREFERABLY TOGETHER WITH THE STEAM FORMED DURING ADIABATIC VENTING, WITH THE APPLICATION OF HEAT AND EVAPORATION OF THE MAJOR PORTION OF THE WATER AT THE SAID PRESSURE OBTAINED BY VENTING OR A LOWER PRESSURE, SAID HEATING BEING CARRIED OUT FOR LESS THAN 10 MINUTES AND PREFERABLY LESS THAN 5 MINUTES AT TEMPERATURES OF FROM 250 DEG TO 350 DEG C and preferably from 260 DEG to 280 DEG C, whereupon C. THE POLYMERIZATION MIXTURE IS SEPARATED FROM THE STEAM IN A FOURTH REACTION ZONE AND IS POLYMERIZED TO COMPLETION IN A FURTHER REACTION STAGE TO FORM HIGH MOLECULAR WEIGHT POLYAMIDES.
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公开(公告)号：SE7508452L
公开(公告)日：1976-01-30
申请号：SE7508452
申请日：1975-07-24
Applicant: BASF AG
Inventor： DOERFEL H , SCHMIDT F , SCHUETTE W , CORDES C , SCHENK W
Abstract: Method of removing odorous formaldehyde from stabilized shaped polyoxymethylenes in which an inert gas is caused to flow over stabilized and shaped solid polyoxymethylenes at elevated temperatures not high enough to cause sticking or fusion of the polyoxymethylene, until substantially all of the volatile formaldehyde has been removed.
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