公开(公告)号：DE2534833A1

公开(公告)日：1977-02-24

申请号：DE2534833

申请日：1975-08-05

Applicant: BASF AG

Inventor： MOELLER ROLF DIPL CHEM DR ,  GUHR UWE DIPL CHEM DR ,  STAHNECKER ERHARD DIPL CHEM DR

IPC: C08J9/00 ,  C08J9/18 ,  C08J9/22 ,  C08L25/06 ,  C08J9/16

Abstract: Spherical, expandible styrene polymers are obtd. by suspending rod-shaped granules of styrene polymers, opt. mixed with 10-90 wt.% of other thermoplastic synthetics, in water contg. a suspending agent, and keeping the granules moving, pref. by stirring, while heating the suspension at above the softening point, for >30 mins. (1-5 hours) and at a press of is not >14 bars (7-10 bars). Granules of uniform size can be obtd. in any required amt. and dimension. Prods. of grain dia. 0.5-0.6 mm, suitable for prodn. of thin-walled goods, can be prepd. Moulds can be filled easily with the spherical granules. The process is esp. suitable for preparing light-fast, pigmented expandible styrene polymers. Opt. the initial granules may contain additives, but no blowing agent; the spherical particles are later impregnatred with the blowing agent.

公开(公告)号：DE2520635A1

公开(公告)日：1976-11-18

申请号：DE2520635

申请日：1975-05-09

Applicant: BASF AG

Inventor： NINTZ ECKHARD DIPL CHEM DR ,  SCHICK RUPERT DIPL CHEM DR ,  SEEGMUELLER KARL DIPL CHEM DR ,  STAHNECKER ERHARD DIPL CHEM DR

IPC: C08F2/00 ,  C08F2/18 ,  C08J9/00 ,  C08J9/12 ,  C08J9/16 ,  F01D5/10 ,  F01D11/08 ,  F04D29/08 ,  F04D29/66 ,  F16J15/44 ,  C08F12/08

公开(公告)号：DE3147310A1

公开(公告)日：1983-06-01

申请号：DE3147310

申请日：1981-11-28

Applicant: BASF AG

Inventor： HEBGEN WERNER DIPL PHYS DR ,  DANZ ECKEHARD DIPL CHEM DR ,  BIRNBAUM EBERHARD ING GRAD ,  KROME GERD DIPL CHEM DR ,  STAHNECKER ERHARD DIPL CHEM DR ,  SCHUMACHER KLAUS DIPL ING

IPC: C07C17/25 ,  C07C21/06 ,  C07C17/34

Abstract: Process for heat recovery from cleavage gases in the preparation of vinyl chloride by cleavage of 1,2-dichloroethane, wherein cleavage of the 1,2-dichloroethane is carried out at a pressure at which the cleavage gases leave the reactor under a pressure in the range from 5 to 30 bar, the cleavage gases are quenched by direct cooling and the resulting vapour is passed through heat exchangers.

公开(公告)号：DE3130552A1

公开(公告)日：1983-02-17

申请号：DE3130552

申请日：1981-08-01

Applicant: BASF AG

Inventor： PYRLIK MANFRED DIPL CHEM DR ,  DANZ ECKEHARD DIPL CHEM DR ,  KROME GERD DIPL CHEM DR ,  STAHNECKER ERHARD DIPL CHEM DR

IPC: C07C17/156 ,  C07C19/045

Abstract: Process for preparing 1,2-dichloroethane by reacting ethylene, hydrogen chloride and oxygen in the presence of a supported catalyst which is present as a fixed bed in only one reaction zone, separating off 1,2-dichloroethane and water and the gas mixture leaving the reaction zone, and returning the off-gas into the reaction zone, with fresh ethylene, hydrogen chloride and oxygen being added to the off-gas.

公开(公告)号：DE2714800A1

公开(公告)日：1978-10-12

申请号：DE2714800

申请日：1977-04-02

Applicant: BASF AG

Inventor： FRIED MICHAEL DIPL CHEM DR ,  ZUERN LUDWIG DIPL CHEM DR ,  STAHNECKER ERHARD DIPL CHEM DR

IPC: C08J9/06 ,  C08J9/00 ,  C08J9/10 ,  C08J9/16 ,  C08L23/00

Abstract: A process for the manufacture of cross-linked foamable moldings from olefin polymers, wherein the olefin polymer is mixed with (A) A SOLID ORGANIC BLOWING AGENT WHICH ELIMINATES GASES WHEN HEATED, (B) AN ORGANIC PEROXIDE, (C) CONVENTIONAL ADDITIVES AND (D) AN ACTIVATING ORGANIC COMPOUND WHICH LOWERS THE DECOMPOSITION TEMPERATURE OF THE PEROXIDE, AND THE MIXTURE IS MOLDED THERMOPLASTICALLY AND IS CROSSLINKED BELOW THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT BUT ABOVE THE DECOMPOSITION TEMPERATURE OF THE ACTIVATED PEROXIDE.

公开(公告)号：DE2609104A1

公开(公告)日：1977-09-15

申请号：DE2609104

申请日：1976-03-05

Applicant: BASF AG

Inventor： KEPPLER HANS GEORG DIPL ING DR ,  STAHNECKER ERHARD DIPL CHEM DR ,  MOELLER ROLF DIPL CHEM DR

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F12/08

Abstract: Styrene polymers are prepared by suspension polymerization using, as suspension stabilizers, mixtures of (A) a sparingly soluble inorganic metal compound and (B) a fine polymer dispersion. The styrene polymers may be used, together with blowing agents, for the manufacture of foams.

公开(公告)号：DE2510937A1

公开(公告)日：1976-09-30

申请号：DE2510937

申请日：1975-03-13

Applicant: BASF AG

Inventor： NINTZ ECKHARD DIPL CHEM DR ,  KEPPLER HANS GEORG DIPL ING DR ,  STAHNECKER ERHARD DIPL CHEM DR

IPC: C08F12/08 ,  C08J9/20

Abstract: Expandable polystyrene particle prepn. by suspension polymerisation of styrene and opt. further co-monomers in the presence of organic suspension stabilisers and blowing agents, takes place in the presence of 0.001-0.4 (0.01-0.2) wt. %, w.r.t. aq. phase of polymerisation batch, of phosphates and/or carbonates of Ca and/or Mg. Method is used in prodn. of foamed articles, by heating pre-foamed compsn. in moulds and sintering. Particles obtd. have a low internal water content, e.g. 0.3-0.8 wt. %. Agglomeration of single particles on foaming is prevented. Waste water pollution by organic cpds. can be reduced by 60% w.r.t. standard processes.

公开(公告)号：DE2423071A1

公开(公告)日：1975-12-11

申请号：DE2423071

申请日：1974-05-13

Applicant: BASF AG

Inventor： VOSS HARRO DIPL CHEM DR ,  MOELLER ROLF DIPL CHEM DR ,  SCHICK RUPERT DIPL CHEM DR ,  STAHNECKER ERHARD DIPL CHEM DR

IPC: C08J9/22 ,  C08J9/224 ,  C08L25/04