Basf Aktiengesellschaft

Badische Anilin- & Soda-fabrik Aktiengesellschaft

Erhard Stahnecker

Rolf Moeller

Ludwig Zuern

Rupert Schick

Hans G Keppler

Eckhard Nintz

Michael Fried

Heinrich Horacek

Eckehard Danz

Gerd Krome

Gilbert Beck

Werner Hebgen

Harro Voss

Karl Buchholz

Karl Seegmueller

Heinz Burger

A process for the preparation of vinyl chloride by vaporizing liquid 1,2-dichloroethane, thermally cracking the 1,2-dichloroethane and cooling the hot reaction mixture by means of cooled and condensed portions of the reaction mixture, wherein a defined amount of the 1,2-dichloroethane is taken off as liquid in or downstream of the vaporizer and mixed with a defined amount of the cooled liquid portion of the reaction mixture, the mixture is distilled and the constituents taken off the top of the distillation column are mixed with the liquid 1,2-dichloroethane upstream of the vaporizer while the constituents taken off the bottom of the distillation column are worked up by distillation.

Preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane

Styrene polymers are prepared by suspension polymerization using, as suspension stabilizers, mixtures of

Manufacture of styrene suspension polymers

Particulate expandable styrene polymers having short minimum molding times which are coated with from 0.005 to 0.5% by weight, based on the expandable styrene polymer, of a mono- and/or poly-urethane melting below 150.degree. C. and obtained by reaction of

Particulate expandable styrene polymers having short minimum molding

A process for the manufacture of cross-linked foamable moldings from olefin polymers, wherein the olefin polymer is mixed with

Manufacture of crosslinked foamable moldings from olefin polymers

Process for the manufacture of styrene polymers optionally containing blowing agent by polymerization in aqueous suspension using as the suspension stabilizer a calcium phosphate which after its manufacture by precipitation has been heated in aqueous dispersion for at least 2 hours at from 70.degree. to 130.degree. C. The styrene polymers may be used for the manufacture of foams.

Tubeless automobile tires filled with foam, the foam used being closed-cell foamed particles of a partially crystalline olefin polymer of olefins of from 2 to 6 carbon atoms.

Automobile safety tires

A process for the manufacture of expandable styrene polymers by suspension polymerization of the monomers in the presence of blowing agents and suspension stabilizers, the latter having been manufactured by polymerization of vinyl monomers in the presence of vinylpyrrolidone polymers. The expandable styrene polymers can be further processed to give foams.

Manufacture of expandable styrene polymers

Particulate expandable styrene polymers containing organic halogen compounds and, to improve processability, from 0.0001 to 1.0% by weight, based on the styrene polymer, of an amine which is soluble in styrene and free from hydroxyl groups.

Particulate expandable styrene polymers having good processability

Particulate, expandable styrene polymers containing a flame-proofing organic halo compound as expanding agent and also a mixture of from 2.5 to 30% by weight of a hydrocarbon of from 3 to 6 carbon atoms and from 97.5 to 70% by weight of monofluorotrichloromethane, based on the total weight of said mixture serving as expanding agent, show good processability and exhibit self-extinguishing properties even during processing.

Particulate, expandable self-extinguishing styrene polymers showing good

Particulate expandable styrene polymers requiring short residence times in the mold are obtained by polymerizing styrene and, optionally, other copolymerizable monomers in the presence of expanding agents and from 0.001 to 0.1% by weight of a brominated oligomer or polymer of a 1,3-diene for at least part of the time at temperatures of from 110.degree. to 140.degree.C.

Growing community of inventors

Ziegelhausen, Germany

Erhard Stahnecker