Basf Aktiengesellschaft

Joachim Kunde

Rolf Wurmb

Hermann Gausepohl

Jenoe Kovacs

Bruno Sander

Heinz Berbner

Johannes Schlag

Rainer Theysohn

Werner Hoerauf

Rolf Steinberger

Wolfgang Seydl

Dieter Stein

Paul Matthies

Eckhard Ropte

Hans Georg Dorst

An improved process for the continuous polymerization of .epsilon.-caprolactam in the presence of water as initiator in a vertical downward-flow tubular reactor, in which the .epsilon.-caprolactam is partially polymerized at elevated temperature in a first, mechanically agitated reaction zone and is further polymerized in further reaction zones to the desired degree of polymerization. Poly-.epsilon.-caprolactam is discharged in the form of a melt. The polymerization is carried out at a gauge pressure of from 0.2 to 0.9 bar, constant in all reaction zones. The temperature in the first reaction zone is maintained according to the relationship t.ltoreq.265+43 p .degree.C., where p is the numerical value of the gauge pressure in bars which relationship is subject to the condition that the temperature be within the range of 260.degree. to 295.degree. C.

Hydrolytic polymerization of epsilon-caprolactam

The manufacture of paper-like and textile-like sheet materials by the use of fibrids which have been obtained by dissolving poly(amide-imide) resins in an organic solvent, mixing the resulting solution with a liquid which is a non-solvent for the polymer and introducing the resulting solution into a liquid precipitation medium while exposing it to shearing forces.

Manufacture of paper-like and textile-like sheets

Thermoplastic polybutylene terephthalate molding compositions containing calcium sulfate and/or barium sulfate to increase the tracking resistance.

Thermoplastic polybutylene terephthalate molding compositions of

Reinforced plastics containing an addition of from 0.05 to 2% w/w of a styrene oligomer.

Reinforced thermoplastics

Glass-fiber-reinforced molding compositions of reduced flammability consisting of (A) a linear saturated polyester resin, (B) from 10 to 60 per cent by weight of glass fibers and (C) from 3 to 30 per cent by weight of a flame retardant. The compositions contain from 2 to 20 per cent by weight, based on the total weight of the molding composition, of a particulate water-insoluble silicate having a bulk density of more than 100 g/l, which prevents dripping of the composition when in contact with an open flame.

Glass-fiber-reinforced polyester molding compositions of reduced

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Frankenthal, Germany

Joachim Kunde