公开(公告)号：BR0212868A

公开(公告)日：2004-09-14

申请号：BR0212868

申请日：2002-09-30

Applicant: BASF AG

Inventor： GASCHLER WOLFGANG ,  SCHODLER VOLKER ,  MANDERS LAMBERTUS ,  WIRTH THOMAS ,  NER HUBERTUS KR

IPC: C08F2/22 ,  C08F2/38 ,  C08F212/00 ,  C08F212/08 ,  C08F236/00 ,  C08F236/10 ,  C08F236/06 ,  C08F291/00

Abstract: A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC having 6 to 20 carbon atoms, which is selected from compounds which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and from alpha-methylstyrene dimer comprises including at least 30% of the hydrocarbon HC in the initial charge to the polymerization vessel and supplying the remainder of the hydrocarbon HC to the polymerization reaction in the course of that reaction.

公开(公告)号：BR0013477A

公开(公告)日：2002-04-30

申请号：BR0013477

申请日：2000-08-25

Applicant: BASF AG

Inventor： KASTENHUBER WALTER ,  NER HUBERTUS KR ,  FUNKHAUSER STEFFEN

IPC: F04D29/22

Abstract: The invention relates to an apparatus for transporting polymer dispersions, said apparatus being capable of being driven by a drive and being designed as an impeller ( 28 ). It is possible for said impeller both to be surrounded by a housing and to protrude freely into the polymer dispersion contained in the reactor tank. A number of vanes ( 2 ) are mounted in the region of the hub ( 1 ) of the impeller ( 28 ) in such a way that pumping spaces ( 5, 25 ) on the front side ( 7 ) and rear side ( 8 ) of the impeller ( 28 ) are flowed through uniformly.

公开(公告)号：BR0212879A

公开(公告)日：2004-10-13

申请号：BR0212879

申请日：2002-09-30

Applicant: BASF AG

Inventor： MANDERS LAMBERTUS ,  WIRTH THOMAS ,  GASCHLER WOLFGANG ,  NER HUBERTUS KR

IPC: C08F2/38 ,  C08F212/08 ,  C08F236/06

Abstract: A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC selected from compounds having 6 to 20 carbon atoms which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and from alpha-methylstyrene dimer comprises supplying the monomers to be polymerized to the polymerization reaction over the course of 3 hours.

公开(公告)号：BR0212875A

公开(公告)日：2004-10-13

申请号：BR0212875

申请日：2002-09-30

Applicant: BASF AG

Inventor： GASCHLER WOLFGANG ,  SCHODLER VOLKER ,  MANDERS LAMBERTUS ,  WIRTH THOMAS ,  NER HUBERTUS KR

IPC: C08F2/38 ,  C08F212/08 ,  C08F220/04 ,  C08F220/44 ,  C08F236/06 ,  C08F236/10 ,  C09D5/02 ,  C09D109/06 ,  C09D109/08 ,  C09D125/10 ,  D21H19/58 ,  C08F291/00 ,  D21H17/35

Abstract: A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M comprising styrene, butadiene, and if desired up to 30% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers other than styrene and butadiene; in a polymerization vessel by a monomer feed technique in the presence of a regulator system containing, based on 100% by weight of monomers, from 0.02 to 0.5% by weight of at least one hydrocarbon HC having from 6 to 20 carbon atoms, selected from compounds which on abstraction of a hydrogen atom form a pentadienyl radical or 1-phenylallyl radical, and alpha-methylstyrene dimer, and from 0.3 to 2% by weight of an organic compound S containing at least one SH group wherein at least 30%, preferably at least 50%, in particular at least 80%, and with particular preference the entirety (or >95%) of hydrocarbon HC is included in the initial charge to the polymerization vessel.

公开(公告)号：BR0212869A

公开(公告)日：2004-09-14

申请号：BR0212869

申请日：2002-09-30

Applicant: BASF AG

Inventor： MANDERS LAMBERTUS ,  WIRTH THOMAS ,  GASCHLER WOLFGANG ,  NER HUBERTUS KR

IPC: C08F2/22 ,  C08F2/16 ,  C08F2/38 ,  C08F212/00 ,  C08F236/00 ,  C08F236/10 ,  C08F212/08