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公开(公告)号：FR1468009A
公开(公告)日：1967-02-03
申请号：FR49150
申请日：1966-02-10
Applicant: BASF AG
Inventor： POHLEMANN HEINZ , FLORUS GERHARD , SLIWKA WOLFGANG , GELLRICH MANFRED
IPC: C08F18/04
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公开(公告)号：FR1462866A
公开(公告)日：1966-12-16
申请号：FR44939
申请日：1966-01-05
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG , HEIL EDUARD
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公开(公告)号：ES2002334A6
公开(公告)日：1988-08-01
申请号：ES8601861
申请日：1986-09-12
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG
Abstract: PROCEDIMIENTO CONTINUO PARA LA OBTENCION DE MICROCAPSULAS CON PAREDES CONSTITUIDAS POR CONDENSADOS DE MELAMINA-FORMALDEHIDO EN DISPERSION ACUOSA, A PARTIR DE PRECONDENSADOS CORRESPONDIENTES DE MELAMINA-FORMALDEHIDO EN PRESENCIA DE POLIMEROS SUPERIORES SOLUBLES EN AGUA QUE CONTIENEN GRUPOS FUERTEMENTE ACIDOS, CARACTERIZADO PORQUE LOS PRECONDENSADOS SOLUBLES EN AGUA SE CONTINUAN CONDENSANDO HASTA QUE COMIENCE A ENTURBIARSE LA SOLUCION, A CONTINUACION SE DISPERSA EN LA DISPERSION FORMADA EL MATERIAL A SER ENCAPSULADO EN PRESENCIA DEL POLIMERO SUPERIOR SOLUBLE EN AGUA QUE CONTIENE GRUPOS FUERTEMENTE ACIDOS Y, A CONTINUACION, SE TERMINA DE CONDENSAR EL MATERIAL DE LA PARED DE LAS MICROCAPSULAS FORMADAS EN ESTE CASO.
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公开(公告)号：FI863681A
公开(公告)日：1987-03-15
申请号：FI863681
申请日：1986-09-11
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG
Abstract: 1. A continuous process for preparing microcapsules having melamine-formaldehyde condensate capsule walls in aqueous dispersion starting from appropriate water-soluble melamine-formaldehyde precondensates in the presence of water-soluble high polymers containing strongly acid groups, which comprises either 1) continuously mixing the water-soluble precondensate, the hydrophobic material to be encapsulated and the aqueous solution of the high polymer containing strongly acid groups, 2) further condensing the water-soluble precondensate in this mixture at pH 3.0-6.5 until the solution starts to become cloudy, 3) continuously dispersing the hydrophobic material in the aqueous dispersion formed, the fine droplets of the hydrophobic material being enveloped by the water-insoluble condensate resulting from the precondensate, or 1a) continuously mixing the water-soluble precondensate and the aqueous solution of the high polymer containing strongly acid groups, 2a) further condensing the water-soluble precondensate in the mixture at pH 3.0-6.5 until the solution starts to become cloudy, then 3a) continuously dispersing the hydrophobic material in the aqueous dispersion formed, the fine droplets of the hydrophobic material being enveloped by the water-insoluble condensate resulting from the precondensate, and then 4) condensing the wall material of the resulting microcapsules to completion.
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公开(公告)号：AU5566186A
公开(公告)日：1986-11-13
申请号：AU5566186
申请日：1986-04-04
Applicant: BASF AG
Inventor： HOFFMANN DIETRICH , SLIWKA WOLFGANG
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Patent Agency Ranking
公开(公告)号：FI863681A0
公开(公告)日：1986-09-11
申请号：FI863681
申请日：1986-09-11
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG
Abstract: 1. A continuous process for preparing microcapsules having melamine-formaldehyde condensate capsule walls in aqueous dispersion starting from appropriate water-soluble melamine-formaldehyde precondensates in the presence of water-soluble high polymers containing strongly acid groups, which comprises either 1) continuously mixing the water-soluble precondensate, the hydrophobic material to be encapsulated and the aqueous solution of the high polymer containing strongly acid groups, 2) further condensing the water-soluble precondensate in this mixture at pH 3.0-6.5 until the solution starts to become cloudy, 3) continuously dispersing the hydrophobic material in the aqueous dispersion formed, the fine droplets of the hydrophobic material being enveloped by the water-insoluble condensate resulting from the precondensate, or 1a) continuously mixing the water-soluble precondensate and the aqueous solution of the high polymer containing strongly acid groups, 2a) further condensing the water-soluble precondensate in the mixture at pH 3.0-6.5 until the solution starts to become cloudy, then 3a) continuously dispersing the hydrophobic material in the aqueous dispersion formed, the fine droplets of the hydrophobic material being enveloped by the water-insoluble condensate resulting from the precondensate, and then 4) condensing the wall material of the resulting microcapsules to completion.
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公开(公告)号：FI803190L
公开(公告)日：1981-04-09
申请号：FI803190
申请日：1980-10-08
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG
Abstract: In a process for the preparation of microcapsules based on a melamine-formaldehyde resin, in which the microcapsules are obtained by condensing a melamine-formaldehyde precondensate, its C1-C4-alkyl ethers, or mixtures thereof, in water in which the material forming the capsule core is dispersed, at a pH of from 3 to 6.5 and at from 20 DEG to 100 DEG C., the improvement that the water contains a homopolymer or copolymer which possesses sulfonic acid groups but is devoid of phenyl or sulfophenyl groups and has a K value of from 100 to 170 or a viscosity of from 200 to 5,000 mPa.s (shearing gradient 489 s-1; 20% strength solution at 25 DEG C.), and that the melamine-formaldehyde precondensate is added continuously, or in portions, in step with the rate of condensation. The process gives individual capsules which are highly impermeable. The capsules are exceptionally useful for the production of pressure-sensitive recording materials.
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38.发明专利
公开(公告)号：CA1018690A
公开(公告)日：1977-10-04
申请号：CA185879
申请日：1973-11-15
Applicant: BASF AG
Inventor： GRUBERT HEINRICH , DRUSCHKE WOLFGANG , SLIWKA WOLFGANG
IPC: C08F2/00 , C08F2/22 , C08F2/24 , C08F18/04 , C08F20/12 , C09D131/04 , C09D133/04 , C09J133/04
Abstract: 1440768 Aqueous dispersions of ester polymers BASF AG 15 Nov 1973 [16 Nov 1972] 52977/73 Heading C3P An aqueous dispersion of a polymer of a mono-olefinically unsaturated carboxylic ester is prepared by emulsion polymerization of said ester in the presence of (a) 0À05 to 7% of a non-ionic emulsifier (b) 0À05 to 5% of an anionic emulsifier (c) 0À01 to 5% of a protective colloid based on an N-vinyl pyrrolidone polymer and (d) 0À01 to 7% of a hydroxyl containing protective colloid which is a polyvinyl alcohol, a water-soluble partially saponified vinyl acetate polymer or a mixture thereof, said percentages being by weight of the total weight of monomer. The non-ionic emulsifier may be an adduct of 25 moles of ethylene oxide and 1 mole of pisooctyl phenol, C 18 fatty alcohol or a fatty alcohol mixture of C 16 -C 19 alcohols, 50% of which' are saturated, and the anionic emulsifier may be the sodium salt of the sulphuric acid monoester of the adduct of 25 moles of ethylene oxide and 1 mole of p-isooctyl or p-nonyl phenol. Examples describe the production of copolymers of (1) vinyl acetate, vinyl 2-ethylhexanate and crotonic acid, (2) ethyl acrylate, acrylic acid and sodium vinylsulphonate, (3) vinyl acetate, dibutyl maleate, acrylic acid and sodium vinyl sulphonate, (4) styrene, 2-ethylhexyl acrylate, acrylic acid and sodium vinyl sulphonate, (5) vinyl acetate, n-butyl acrylate, acrylic acid and sodium vinyl sulphonate, (6) as (5) plus butanediol-1,4-diacrylate, and (7) vinyl acetate, 2-ethylhexyl acrylate and acrylic acid.
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公开(公告)号：GB1148060A
公开(公告)日：1969-04-10
申请号：GB3510566
申请日：1966-08-05
Applicant: BASF AG
Inventor： POHLEMANN HEINZ , FLORUS GERHARD , SLIWKA WOLFGANG , GELLRICH MANFRED
IPC: C08F2/18 , C08F2/22 , C08F18/04 , C08F291/00
Abstract: 1,148,060. Aqueous dispersions of vinyl ester polymers. BADISCHE ANILIN- & SODA-FABRIK A.G. 5 Aug., 1966 [6 Aug., 1965], No. 35105/66. Heading C3P Aqueous dispersions of vinyl ester polymers are formed by polymerizing the monomer(s) in aq. phase in the presence of an emulsifier comprising (A) 15-70% of at least one copolymer of 50-90% of acrylic and/or methacrylic acid with at least one other nonionic ethylenically unsaturated monomer and which is soluble in water at a pH of at least 4, (B) 15-70% of at least one polyalkylene oxide or its derivative which is not sulphonated and (C) 15-70% of at least one sulphonated long chain alcohol having at least 8 carbon atoms. The vinyl ester polymer may be derived from vinyl propionate and acrylic acid or sodium vinyl sulphonate, tert-butyl acrylate and methyl vinyl carbinol or vinyl acetate acrylic acid or n-butyl acrylate. The emulsifier may acomprise (A) a copolymer of acrylic acid, acrylamide, methyl acrylate and/or acrylonitrile, (B) an adduct of ethylene oxide and sperm oil alcohol or iso-octylphenol and (C) a sulphonation product of (B). The polymerization may be in the presence of vinylpyrrolidone potassium persulphate, formic acid, ascorbic acid, n-dodecyl mercaptan. The aq. dispersion may be compounded with methyl cellulose, sodium metahexaphosphate, ammonium polyacrylate, aq. ammonia, chalk, rutile, kaolin, talc, dolomite, zinc white, titanium dioxide, china clay, blanc fixe, satin white and/or casein.
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公开(公告)号：GB1138627A
公开(公告)日：1969-01-01
申请号：GB138866
申请日：1966-01-12
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG , HEIL EDUARD
Abstract: 1,138,627. Removing heat in polymerization reactions. BADISCHE ANILIN- & SODAFABRIK A.G. 12 Jan., 1966, No. 1388/66. Heading C3P. [Also in Division B1] Heat of reaction, evolved in the emulsion, suspension or solution polymerization of olefinically unsaturated monomers in a reactor, is removed by evaporating one or more liquids contained in the dispersion or solution, condensing the vapour in a condenser and returning the condensate to the reactor, the polymerization being carried out in a closed system (i.e. a system in which the reactor is in pressure communication with the condenser but not with the external atmosphere, so that the pressure in reactor and condenser may be fixed independently of atmospheric pressure) and the internal temperature of the reactor being maintained constant by a self-regulating action wherein the internal temperature of the reactor controls a regulating means which regulates the rate of condensation in the condenser which, in turn, controls the internal temperature of the reactor. An apparatus adapted for such a controlled polymerization process is described. Examples describe the polymerization, in aqueous medium, of (a) vinyl propionate, (b) acrylamide with acrylic acid and (c) vinyl chloride with vinyl propionate.
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