公开(公告)号：DE59806790D1

公开(公告)日：2003-02-06

申请号：DE59806790

申请日：1998-06-10

Applicant: BASF AG

Inventor： LYNCH DR ,  GOERTZ DR ,  NOLTE DR ,  HAHN DR ,  ELZER GUNTER ,  TSCHANG DR ,  KROENER DR

IPC: C08F14/06 ,  C08F214/06 ,  C08F257/02 ,  C08F285/00 ,  C08L27/06 ,  C08L51/00

公开(公告)号：DE59702949D1

公开(公告)日：2001-03-01

申请号：DE59702949

申请日：1997-10-01

Applicant: BASF AG

Inventor： KROENER DR ,  KLANIG WOLFGANG ,  MORRISON DR ,  KLOSTERMANN DR ,  SCHOEPKE DR ,  KASTENHUBER WALTER

IPC: B01J19/18 ,  C08F2/00 ,  C08F2/22 ,  C08F12/08 ,  C08F14/06 ,  C08F14/08 ,  C08F18/08 ,  C08F20/00 ,  C08F36/06

Abstract: In a process for the preparation of homo or copolymers of at least one polymerisable monomer consisting of styrene, butadiene, vinyl chloride, vinyl acetate, vinylidene chloride, alkyl(meth)acrylate, meth(acrylic)acid, (meth)acrylonitrile or (meth)acrylamide by an emulsion polymerisation technique, reaction is carried out at at least 40 degrees C in the presence of a dispersing agent and a radical initiator such that at least 85 wt.% of the polymer is prepared by (a) mixing water, inert solvent and optionally dispersing agent and optionally a portion of the monomer, (b) adding initiator and (c) adding the rest of the monomer, optionally in the form of an emulsion with further water and optionally further dispersing agent or processing aids. Steps (a) and (b) or (b) and (c) may be carried out together at 40-120 degrees C and the resulting dispersion from each step or all the steps is recirculated around a flow loop external to the reaction vessel containing a low shear pump and a heat exchanger exhibiting a laminar flow profile. An apparatus for carrying out the reaction is also claimed and comprises means for storing and feeding reactants and processing aids, a reactor vessel with a heating/cooling mantle and means for draining, an external flow loop with a low shear pump and heat exchanger exhibiting a laminar flow profile and necessary connecting pipes.

公开(公告)号：DE59508503D1

公开(公告)日：2000-08-03

申请号：DE59508503

申请日：1995-04-15

Applicant: BASF AG

Inventor： KROENER DR ,  JAHNS DR ,  MIELKE MANFRED

IPC: B01J13/00 ,  B32B17/10 ,  C08F2/44 ,  C08F2/48 ,  C08F261/06 ,  C08F271/00 ,  C08F291/00 ,  C09K9/02

Abstract: Gels for thermotropic sheets are claimed which are obtd. by light-radiation of a mixt. comprising (A) a non-crosslinked polymer (pref. 5-40 wt.%); (B) a radically-polymerisable monomer (pref. 1-30 wt.%); and (C) water and/or an org. solvent (pref. 30-94 wt.%). Pref. a photoinitiator is opt. also present. Polymer (A) has transparency changes in a 10 wt.% aq. and/or org. solvent soln. and is poly-N-vinylcaprolactam, a copolymer contg. at least 20 wt.% N-vinylcaprolactam, or a polyvinylether. Monomer (B) forms a 3-D network on light-irradiation and ether does not have thermotropic properties of the type specified above or has such properties at at least 20 degrees C above the switching region for polymer (A). (C) is water.