-
公开(公告)号：DE2448476A1
公开(公告)日：1976-04-22
申请号：DE2448476
申请日：1974-10-11
Applicant: BASF AG
Inventor： WIRTH HEINRICH DR , HINSELMANN KLAUS DIPL ING , SCHICK RUPERT DR , WEBER HEINZ DR , WALTER MANFRED DR , PENZIEN KLAUS DR
Abstract: Finely divided, expandable styrene polymer for the prepn. of foamed bodies contains 0.0001-0.2% calcd. on the styrene polymer, of a nucleating agent for the expandable polystyrene, in inhomogeneous distribution, the nucleating agent being present in only a narrow marginal zone of the particle, the interior of the particle being free from nucleating agent. Used as esp. effective heat-conducting matl.; after foaming, each particle contains internally 5-7 cells) mm, whilst the narrow marginal zone shows a much larger cell count.
-
公开(公告)号：DE2137274A1
公开(公告)日：1973-02-08
申请号：DE2137274
申请日：1971-07-26
Applicant: BASF AG
-
公开(公告)号：DE3131440A1
公开(公告)日：1983-02-24
申请号：DE3131440
申请日：1981-08-07
Applicant: BASF AG
Inventor： HINSELMANN KLAUS DIPL ING , NAARMANN HERBERT DIPL CHEM DR , ECHTE ADOLF DIPL CHEM DR , HEIL EDUARD DIPL ING , NIKLES ALBERT DIPL ING , REFFERT RUDI WILHELM DIPL ING , HAMBRECHT JUERGEN DIPL CHEM DR
IPC: C08L7/00 , B29C35/00 , B29C45/00 , C08G65/46 , C08J3/00 , C08J3/20 , C08L21/00 , C08L23/00 , C08L33/00 , C08L33/02 , C08L71/00 , C08L71/12 , C08L101/00 , C08L71/04 , B01D1/26
Abstract: Molding materials containing high molecular weight polyphenylene ethers are produced by a process in which a solution of a polyphenylene ether in an organic solvent, together with another polymer, is freed of solvent by multi-stage evaporation. The solvent is preferably an aromatic compound from the class comprising the hydrocarbons, halohydrocarbons, ethers or esters, the ratio of the other polymer to the polyphenylene ether is advantageously from 99:1 to 20:80 parts by weight, the other polymer is, in particular, a homopolymer or copolymer of styrene or of a homolog thereof, which may be modified with rubber, and the multi-stage evaporation process preferably comprises not less than two and not more than four working up stages. The evaporation is carried out in general at from 120 DEG to 280 DEG C. and under a pressure of from 1 to 3,000 mbar, advantageously in the presence of assistants which reduce the partial pressure, eg. water and/or methanol.
-
4.发明专利
公开(公告)号：DE2428382A1
公开(公告)日：1976-01-02
申请号：DE2428382
申请日：1974-06-12
Applicant: BASF AG
Abstract: A continuous web of foamed polyolefin partic. polyethylene is produced by extruding activated and catalysed polymer into the end of a long channel which is bordered with endless belts, heating to reaction temp. moving between the belts and foaming under pressure of 30-70 kP/cm2. Provides a practicable method of producing fine-cell polyolefin foam continuously.
-
公开(公告)号：DE3147309A1
公开(公告)日：1983-06-01
申请号：DE3147309
申请日：1981-11-28
Applicant: BASF AG
Abstract: Oxymethylene polymers are prepared by a continuous process, by mass polymerization of the monomers with the aid of conventional, preferably cationic, initiators, wherein the monomers as well as the resulting polymer are present substantially in molten form during the polymerization.
-
Patent Agency Ranking
公开(公告)号：DE2448956A1
公开(公告)日：1976-04-29
申请号：DE2448956
申请日：1974-10-15
Applicant: BASF AG
Inventor： PENZIEN KLAUS DR , WALTER MANFRED DR , WIRTH HEINRICH DR , HINSELMANN KLAUS DIPL ING , SCHICK RUPERT DR , WEBER HEINZ DR
Abstract: Finely divided expansible styrene polymer particles, for the prodn. of foram mouldings, contain 0.0001-0.2 phr of a nucleating agent (I) in non-homogeneous distribution, (I) being situated only in a thin band at the surface of the particles and virtually absent in the interior. Mouldings obtd. from the particles can be demoulded after a short dwell-time in the mould, have very low thermal conductivity (due to the coarse internal pore structure), have good dimensional stability (i.e. no lateral depression) and have homogeneous density.
-
公开(公告)号：DE2255466A1
公开(公告)日：1974-05-16
申请号：DE2255466
申请日：1972-11-13
Applicant: BASF AG
Inventor： WURMB ROLF DR , DENNI RAYMOND DR , HINSELMANN KLAUS DIPL ING , BRONSTERT KLAUS DR , THEYSOHN RAINER DR
Abstract: According to parent patent, a glass-fibre reinforced styrene polymer contains (A) 10-50% glass fibres; (B) 90-3% of a copolymer of styrene with 3-50% of an ethylenically unsatd. nono- or di-carboxylic acid, acid ester or acid amide, a dicarboxylic acid half ester or a dicarboxylic acid anhydride, and opt. other comonomers, and (C) 0-87% of a styrene homo- or copolymer miscible with (B), the glass fibres having been pre-sized with a dispersion or soln. contg. an organosilane as keying agent and opt. a plastic as film-former, the organosilane contg. reactive gps. forming chemical bonds with the functional gps. of (B). In the present improvement, the strength of the reinforced polymer is further increased by using as (B), a graft copolymer of styrene and maleic anhydride onto a styrene polymer.
-
公开(公告)号：DE2846757A1
公开(公告)日：1980-05-08
申请号：DE2846757
申请日：1978-10-27
Applicant: BASF AG
Inventor： BOOTZ LUDWIG , OHLIG HILMAR , HINSELMANN KLAUS DIPL ING , SCHLEMMER LOTHAR ING GRAD
Abstract: A dispersion of styrene-acrylonitrile graft copolymer on a rubber-elastic polymer and a pptnt. are introduced into the pptn. zone of a tubular reactor comprising a pptn. zone, a sintering zone and a discharge zone. The reactor contains rotating supply- and mixer-units and its length: dia. ratio is 10:50. The tempo. is 20-150 degrees C in pptn. zone, 80-240 degrees C in sintering zone and o0-180 degrees C in discharge zone, provided that in sintering zone the temp. is kept at 30-90 degrees C above the temp. in pptn. zone and in discharge zone, the temp. is kept at 30-120 degrees C below the temp. in sintering zone. Average polymer dwelling time in reactor is 0.5-10 mins. Dwelling time in each of pptn.-, sintering- and discharge zone is 1/5 to 1/2 of total dwelling times and the dwelling times in the zone add up to 1. The pressure in pptn. - and sintering-zones corresponds to the liq. phase vapour pressure at the prevailing temp. The total liq. and polymer phase vol. is 10-100% of the free reactor vol. Finally, the liq. phase and sintered polymer mixt. is discharged through the discharge zone. The particles obtd. are used as additives to improve the toughness of styrene-acrylonitrile polymers. The polymer dispersion is self-sealing so that sintering zone pressure can lie above surrounding pressure without the need for a pressure-valve.
-
公开(公告)号：DE2719905A1
公开(公告)日：1978-11-16
申请号：DE2719905
申请日：1977-05-04
Applicant: BASF AG
Inventor： HINSELMANN KLAUS DIPL ING , WEBER HEINZ DIPL CHEM DR , BLECKMANN GERHARD ING GRAD , WINKENS HELMUT
Abstract: Parent Patent discloses the continuous prepn. of foamed profiles, having thickness 1-200 mm, by (A) homogenising a mixt. contg. (a) an olefin polymer, (b) 1-30 wt. % solid organic blowing agent, decomposing on heating to generate inorganic gases, (c) 0.1-10 wt. % organic peroxide and opt. (d) 0.1-10 wt. % foaming auxiliaries, crosslinking promoters and standard additives; (B) crosslinking and foaming the olefin polymer in a foaming zone, at 160-280 degrees C; and (C) extruding the foam from foaming zone, with cooling and solidifying. In foaming zone, pressure is 5-150 bar. Ratio of foaming zone length: max. thickness is 100-2000:1. The improvement comprises applying an additional organic peroxide, c', to the surface of the homogenised mixt. of (A) before entering into foaming zone. c' is pref present at 0.001-0.1 wt. % w.r.t. (a+b+c+d)mixt. Peroxide c' is pref. added together with a lubricant, opt. contg. a solubiliser, e.g. a lower alcohol, for c'. The stronger outer skin allows the prepn. of extrudable foamed profiles having a lower gel content, e.g. 10-30 wt. %.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.019 seconds)
