公开(公告)号：DE2630929B1

公开(公告)日：1977-11-17

申请号：DE2630929

申请日：1976-07-09

Applicant: BASF AG

Inventor： ECHTE ADOLF DIPL-CHEM DR ,  ADLER HANSJOERG DIPL-CHEM DR

IPC: C08F291/02 ,  C08F279/02

Abstract: Impact-resistant polymers are prepd. by continuous polymerisation of a rubber soln. in monovinyl aromatic cpds., opt. in the presence of further copolymerisable monomers and/or an inert solvent. In a 1st step, starting soln. is polymerised to an extent such that solids content of reaction mixt. is 1.1-2x rubber content but =16 wt.% w.r.t. sum or monomer charged+ rubber. Reaction mixt. is then charged to a 2nd isothermal polymerisation step. Further polymerisation takes place with intimate mixing and shearing of reaction mixt., at 50-150 degrees C, up to a converstion above phase inversion point but only to solids content 40 wt.% w.r.t. sum of monomer and rubber. In a 3rd step, polymerisation is completed in >=1 continuously operated elongated polymerisation zones, at temps. rising to 250 degrees C, with weak or no stirring, to form a mixt. contg. >=70 wt.% solids, w.r.t. charnged m monomers+rubber. Volatile components are then expelled from mixt. Improvement comprises polymerising starting soln. in 1st step in the presence of organic per-cods. as initiators. Temps. are so low that proportion of polymerisation initiated by organic per-cpds. exceeds the thermally initiated polymerisation in conversion of 1st and 2nd steps. Polymers can be extruded, injection moulded or deep drawn to impact-resistant articles. Per-cpd. initiator addn. improves gloss, e.g. from the 11% to 41%. Articles also have high tenacity.

公开(公告)号：DE2525019B1

公开(公告)日：1975-12-04

申请号：DE2525019

申请日：1975-06-05

Applicant: BASF AG

Inventor： MITTNACHT HANS DIPL-CHEM DR ,  ECHTE ADOLF DIPL-CHEM DR ,  JENNE HELMUT DIPL-CHEM DR ,  LIEB MANFRED DIPL-ING ,  BRONSTERT KLAUS DIPL-CHEM DR ,  ADLER HANSJOERG DIPL-CHEM DR

IPC: C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L25/00 ,  C08L25/10 ,  C08L51/00 ,  C08L51/02 ,  C08L51/04 ,  C08L77/00 ,  C08L101/00 ,  C08L25/04 ,  C08L51/06

Abstract: Thermoplastic molding compositions, based on polymers of a monovinyl-aromatic compound which have been modified with rubber to increase their impact strength, which also exhibit increased stress crack resistance.

公开(公告)号：DE2343871A1

公开(公告)日：1975-04-03

申请号：DE2343871

申请日：1973-08-31

Applicant: BASF AG

Inventor： REFFERT RUDI WILHELM ,  ECHTE ADOLF DIPL-CHEM DR ,  ZIZLSPERGER JOHANN DIPL-CHEM D ,  TETZLAFF ERNST DIPL-ING DR

IPC: C08F2/00 ,  C08F2/02 ,  C08F2/04 ,  C08F2/06

Abstract: A continuous process for the polymerisation of olefinically unsaturated monomers in bulk or in solution in which at least a portion of the low-viscosity materials to be fed to the polymerization zone is thoroughly mixed with a portion of the high-viscosity contents of the polymerization zone in a mixing zone disposed upstream of the polymerization zone, which mixture is then continuously fed to the polymerization zone. The resulting polymers have a uniform composition and a narrow molecular weight distribution. They may be converted to shaped articles by thermoplastic methods.