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

公开(公告)号：DE2621448A1

公开(公告)日：1977-12-01

申请号：DE2621448

申请日：1976-05-14

Applicant: BASF AG

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