公开(公告)号：DE4337429A1

公开(公告)日：1994-05-11

申请号：DE4337429

申请日：1993-11-03

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  KRAUS HELMUT DR ,  PLEWAN OTTO

IPC: B29C67/04 ,  C08K5/12 ,  C08L27/06 ,  C08L71/02 ,  H01M2/16 ,  C08J3/18

Abstract: A compsn. contains 15-35 wt.% of a plasticiser, 0.05-15 wt.% of a wetting agent and 100% of a finely divided, porous suspension and/or bulk polyvinyl chloride, and opt. other additives. Also claimed are the prepn. of sintered articles from the compsn. and separator plates for electric cells made from the compsn. The compsn. contains 18-30 wt.% of plasticiser and 0.05-8 wt.% of wetting agent. Mixing of the compsn. is at 60-130 deg.C, followed by sintering at 160-250, pref. 170-230 deg.C. ADVANTAGE - Allows the prepn. of highly flexible articles such as separator plates from vinyl chloride homopolymers having high plasticiser content, without needing the use of (graft) copolymers or polymer mixts. as in the prior art. In an example, finely divided S-PVC was mixed with 15 wt.% of dioctyl phthalate plasticiser, 0.5 wt.% N-cocosalkyl-N,N-dimethylbetaine and 5 wt.% of polypropylene glycol 400 at 75 deg.C rising to 110 deg.C and sieved through a 125 micron sieve. A separator plate was prepd. by sintering the mixture on a steel band at 175 deg.C for 2-2.3 mins.

公开(公告)号：DE3270498D1

公开(公告)日：1986-05-15

申请号：DE3270498

申请日：1982-12-04

Applicant: HOECHST AG

Inventor： EBERL KARL DR ,  ENGELMANN MANFRED DR ,  FISCHER EDGAR DR

IPC: C08F214/00 ,  C08F2/00 ,  C08F2/16 ,  C08F2/42 ,  C08F14/00 ,  C08F14/06 ,  C08F214/06 ,  C08F291/00 ,  C23F15/00

公开(公告)号：DE3401158A1

公开(公告)日：1985-07-18

申请号：DE3401158

申请日：1984-01-14

Applicant: HOECHST AG

Inventor： KLIPPERT HEINZ DR ,  ENGELMANN MANFRED DR ,  PLEWAN OTTO

IPC: C08F2/00 ,  C08F2/20 ,  C08F14/06 ,  C08F214/06 ,  C08F259/04

Abstract: The invention relates to a process for the suspension polymerisation of vinyl chloride, optionally in the presence of monomers which are suitable for copolymerisation or polymers which are suitable for graft polymerisation, in which, as polymerisation assistants, at least one water-soluble, organic, hydroxylated carboxylic acid or a water-soluble salt thereof and at least one other water-soluble reducing agent are used, and the polymerisation is carried out in an apparatus whose surfaces which come into contact with the polymerisation mixture have been coated with a compound derived from phenoxazine or phenothiazine. The novel combination of measures achieves a particularly deposit-free polymerisation which allows more than 30 batches to be carried out one after the other without any visible deposit forming on the apparatus surfaces.

公开(公告)号：DE3673139D1

公开(公告)日：1990-09-06

申请号：DE3673139

申请日：1986-11-28

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  KRAUS HELMUT DR ,  PLEWAN OTTO ,  KLIPPERT HEINZ DR

IPC: C08K5/00 ,  C08K5/19 ,  C08L27/06 ,  C08L51/00 ,  C08L51/06 ,  H01M2/16

公开(公告)号：DE3835509A1

公开(公告)日：1989-05-03

申请号：DE3835509

申请日：1988-10-19

Applicant: HOECHST AG

Inventor： KLIPPERT HEINZ DR ,  ENGELMANN MANFRED DR

IPC: C08F2/20 ,  C08F2/26 ,  C08F265/04

Abstract: The invention relates to a process for the preparation of a polymer containing, in addition to polymerised units of vinyl chloride, from 30 to 60 % by weight, based on the polymer, of polymerised units of an acrylate (acrylic ester), optionally together with copolymerisable monomers. Firstly, the acrylate is polymerised in aqueous emulsion with addition of a monomer containing at least two ethylenically unsaturated, non-conjugated double bonds in the presence of a fatty-acid salt and in the presence of an alkane- or alkylaryl sulphonate. This is followed by polymerisation in aqueous suspension in which vinyl chloride, conventional polymerisation auxiliaries and a precipitant for the emulsifiers used in the emulsion polymerisation and water are initially introduced and the acrylate dispersion produced by emulsion polymerisation is subsequently added. In this way, polymers having a high bulk density and good flow properties and which can readily be demonomerised are obtained. Mixtures with vinyl chloride homopolymers have good processing properties and give mouldings having good impact strength and a good surface.

公开(公告)号：DE3543305A1

公开(公告)日：1987-06-11

申请号：DE3543305

申请日：1985-12-07

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  KRAUS HELMUT DR ,  PLEWAN OTTO ,  KLIPPERT HEINZ DR

IPC: C08K5/00 ,  C08K5/19 ,  C08L27/06 ,  C08L51/00 ,  C08L51/06 ,  H01M2/16 ,  C08J9/24 ,  C08L23/08 ,  C08L31/04 ,  H01M2/14

公开(公告)号：DE3268551D1

公开(公告)日：1986-02-27

申请号：DE3268551

申请日：1982-08-13

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  KLIPPERT HEINZ DR ,  TZSCHOPPE EBERHARD

IPC: C08F14/00 ,  C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F14/06 ,  C08F291/00

Abstract: The process is described for the continuous suspension polymerization of vinyl chloride in aqueous phase, in which the polymerization mixture is subjected, in 2 zones, to treatment employing different process parameters in respect of final conversion, dwell time, number of theoretical cascade stages and stirrer power applied. This procedure gives, at good space-time yields, very uniform products which have a narrow particle size distribution, a high bulk density, good flow and a low speck count. In spite of using standard kettle material, only a very low formation of deposit on the kettle walls is observed.

公开(公告)号：DE3370339D1

公开(公告)日：1987-04-23

申请号：DE3370339

申请日：1983-12-19

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  PLEWAN OTTO ,  KRAUS HELMUT DR ,  KLIPPERT HEINZ DR

IPC: C08F14/00 ,  C08F2/24 ,  C08F214/06 ,  C08F255/02 ,  C08F263/00 ,  C08F263/04 ,  C08F265/00 ,  C08K5/00 ,  C08L27/06 ,  C08L51/00 ,  H01M2/16

公开(公告)号：DE3426929A1

公开(公告)日：1986-01-23

申请号：DE3426929

申请日：1984-07-21

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  KRAUS HELMUT DR ,  PLEWAN OTTO

IPC: C08K5/00 ,  C08K5/19 ,  C08L27/06 ,  H01B3/44 ,  H01M2/16 ,  C08L33/08 ,  C08L31/04 ,  C08L23/08 ,  C08L51/06 ,  H01M2/14 ,  C25B13/04

Abstract: A molding composition which is essentially composed of a mixture of at least two polymers based on vinyl chloride and at least one water-soluble surfactant is described. One of the polymers is a sinterable vinyl chloride/alkyl acrylate copolymer which can contain, in addition, polymerized units of vinyl acetate and ethylene. At least one further polymer is a vinyl chloride polymer which can contain up to 5% by weight of polymerized units of vinyl acetate and ethylene. The molding composition is suitable for the production of sintered, porous, flexible moldings, in particular separator compartments for electric cells.

公开(公告)号：DE3334667A1

公开(公告)日：1985-04-11

申请号：DE3334667

申请日：1983-09-24

Applicant: HOECHST AG

Inventor： ENGELMANN MANFRED DR ,  PLEWAN OTTO ,  KRAUS HELMUT DR ,  MIELKE INGOLF DR

IPC: C08F2/16 ,  C08F14/06 ,  C08F291/00 ,  C08K3/30 ,  C08K3/32 ,  H01M2/16 ,  C08F6/24

Abstract: Prodn. of a sinterable, fine-particle PVC moulding compsn. by homo-, CO- or graft suspension polymerisation of VC monomer in presence of an oil-soluble free-radical initiator, a suspension stabiliser, emulsifier and opt. other polymerisation aids. After ending the polymerisation and sepg. the bulk of the polymer a non-ionic or amphoteric wetting agent is added before drying. The process novelty claimed is the addn. at this stage of an aq. soln. of a non- surface active acid with an acid dissociation constant up to 3 pKs at 20 deg.C.. Pref. 0.01-5 wt.% on dry polymer of a phosphorus or sulphur contg. acid, esp. P contg. acid, with low volatility at 120 deg.C. is added after sepg. the greater part of the polymer from the aq. phase after polymerisation has ended. The polymer has a K-value =55-90, bulk density =400-700g/cdm, and a particle distribution of 99-30 wt.% less than 33 microns, 1-60 wt.% 33-63 microns, 0-9 wt.% 63-125 microns and 0.1 wt.% greater than 125 microns. Sintered shaped articles esp. separator plates for electric cells are claimed.