NO155298B - PROCEDURE FOR REDUCING THE TIRE ON AN ARTIFICIAL OEY DOWN ON A CARBON CONSTRUCTION, AND IMPLEMENTATION FOR IMPLEMENTING THE PROCEDURE. - Google Patents
PROCEDURE FOR REDUCING THE TIRE ON AN ARTIFICIAL OEY DOWN ON A CARBON CONSTRUCTION, AND IMPLEMENTATION FOR IMPLEMENTING THE PROCEDURE. Download PDFInfo
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- NO155298B NO155298B NO833035A NO833035A NO155298B NO 155298 B NO155298 B NO 155298B NO 833035 A NO833035 A NO 833035A NO 833035 A NO833035 A NO 833035A NO 155298 B NO155298 B NO 155298B
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- particles
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- 238000000034 method Methods 0.000 title claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title 1
- 229910052799 carbon Inorganic materials 0.000 title 1
- 238000010276 construction Methods 0.000 title 1
- 239000002245 particle Substances 0.000 claims description 40
- 229920000642 polymer Polymers 0.000 claims description 24
- 239000002904 solvent Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 239000003125 aqueous solvent Substances 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 19
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 12
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 12
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 10
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 239000012071 phase Substances 0.000 description 9
- 229920002678 cellulose Polymers 0.000 description 8
- 239000001913 cellulose Substances 0.000 description 8
- 239000000975 dye Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000000454 talc Substances 0.000 description 6
- 229910052623 talc Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000005995 Aluminium silicate Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000001856 Ethyl cellulose Substances 0.000 description 4
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 4
- 235000012211 aluminium silicate Nutrition 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 4
- 229920001249 ethyl cellulose Polymers 0.000 description 4
- 229960004667 ethyl cellulose Drugs 0.000 description 4
- 235000019325 ethyl cellulose Nutrition 0.000 description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
- 238000004581 coalescence Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- VHRSUDSXCMQTMA-PJHHCJLFSA-N 6alpha-methylprednisolone Chemical compound C([C@@]12C)=CC(=O)C=C1[C@@H](C)C[C@@H]1[C@@H]2[C@@H](O)C[C@]2(C)[C@@](O)(C(=O)CO)CC[C@H]21 VHRSUDSXCMQTMA-PJHHCJLFSA-N 0.000 description 2
- 235000009328 Amaranthus caudatus Nutrition 0.000 description 2
- 240000001592 Amaranthus caudatus Species 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 235000012735 amaranth Nutrition 0.000 description 2
- 239000004178 amaranth Substances 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229960004584 methylprednisolone Drugs 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 239000008262 pumice Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-M Butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Natural products CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- JCYNNMTVYMVGMV-UHFFFAOYSA-N cyclohexane;ethanol Chemical compound CCO.C1CCCCC1 JCYNNMTVYMVGMV-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 235000019700 dicalcium phosphate Nutrition 0.000 description 1
- 229940095079 dicalcium phosphate anhydrous Drugs 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000001046 green dye Substances 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 229910052914 metal silicate Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- RFOHRSIAXQACDB-UHFFFAOYSA-M sodium;2-(2,4-dichlorophenoxy)acetate Chemical compound [Na+].[O-]C(=O)COC1=CC=C(Cl)C=C1Cl RFOHRSIAXQACDB-UHFFFAOYSA-M 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
- E02B17/024—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform shock absorbing means for the supporting construction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Steroid Compounds (AREA)
- Disintegrating Or Milling (AREA)
Description
Fremgangsmåte ved belegging av flytende eller Procedure for coating liquid or
faste partikler med et polymermateriale i ikke-vandige oppløsningsmiddelsystemer. solid particles with a polymeric material in non-aqueous solvent systems.
Foreliggende oppfinnelse vedrdrer en fremgangsmåte ved belegging av flytende eller faste partikler med et polymermateriale i ikke-vandige opplosningsmiddelsystemer. The present invention relates to a method for coating liquid or solid particles with a polymer material in non-aqueous solvent systems.
Det er kjent å belegge flytende og faste partikler med polymere som utskilles fra et organisk opplosningsmiddel. En opplosning av polymeren fremstilles, partiklene dispergeres jevnt i denne, og et organisk ikke-opplosningsmiddel for polymeren og partiklene, hvilken væske imidlertid er blandbar med opplosningsmidlet, tilsettes disper-sjonen. Det utskilles derved en polymerfase som belegger de dispergerte partikler. Ved utforelse av denne fremgangsmåte er det oppstått vanskeligheter ved at en fullstendig gjenvinning av de belagte partikler i enkeltform ofte er umulig på grunn av deres tendens til sammen-klumpning (koalescering). Ufullstendig gjenvinning oker omkostningene. Dessuten resulterer koalesceringen i mangel på ensartethet i partiklene. En slik mangel hindrer utnyttelsen, f.eks. ved fremstilling av enhetsdoser av belagte partikler av terapeutiske bestanddeler, samt i trykkfolsomme papir- eller filmbelegg. It is known to coat liquid and solid particles with polymers which are secreted from an organic solvent. A solution of the polymer is prepared, the particles are uniformly dispersed in this, and an organic non-solvent for the polymer and the particles, which liquid is however miscible with the solvent, is added to the dispersion. A polymer phase is thereby secreted which coats the dispersed particles. When carrying out this method, difficulties have arisen in that a complete recovery of the coated particles in individual form is often impossible due to their tendency to clump together (coalescence). Incomplete recycling increases costs. Moreover, the coalescence results in a lack of uniformity in the particles. Such a deficiency prevents exploitation, e.g. in the production of unit doses of coated particles of therapeutic ingredients, as well as in pressure-sensitive paper or film coatings.
Tilsetning av en kolloidal substans til en væskefase i hvilken plastpartikler behandles, i den hensikt å hindre agglomerering av partiklene, er i og for seg kjent, se britiske patentskrift nr. 659 836. The addition of a colloidal substance to a liquid phase in which plastic particles are treated, with the intention of preventing agglomeration of the particles, is known per se, see British patent document no. 659 836.
Fra US patentskrift nr. 2 171 765 er det kjent en forbedret metode til fremstilling av polyakryle.ter og -metakrylater ved suspen-sjons-polymerisering. Ved å dispergere et finpulverisert materiale, f.eks. talkum, i vannfasen eller i monomeren for denne tilsettes til vannfasen, oppnår man at pulveret får forminsket tendens til sammen-klumpning. Denne- teknikk skiller seg imidlertid klart fra den foreliggende oppfinnelse ved de lave mengdeforhold mellom pulver og polymer. 10$ er den hoyeste av de angitte verdier. From US patent no. 2 171 765 an improved method for the production of polyacrylates and methacrylates by suspension polymerization is known. By dispersing a finely powdered material, e.g. talc, in the water phase or in the monomer for this is added to the water phase, it is achieved that the powder has a reduced tendency to clump together. However, this technique clearly differs from the present invention in the low quantity ratios between powder and polymer. 10$ is the highest of the stated values.
Det er nå blitt funnet at langsom tilsetning av et mineral-silikat til systemet under tilsetningen av ikke-opplosningsmidlet, nedsetter til et minimum den skadelige agglomerering og koalscering. It has now been found that the slow addition of a mineral silicate to the system during the addition of the non-solvent minimizes the harmful agglomeration and coalescence.
Med betegnelsen langsom tilsetning menes at mineralsilikatet tilsettes enten kontinuerlig eller i mange små porsjoner over et tidsrom (i mot-setning til at hele mengden tilsettes på en gang). The term slow addition means that the mineral silicate is added either continuously or in many small portions over a period of time (as opposed to adding the entire amount at once).
Ifolge foreliggende oppfinnelse er det tilveiebragt en fremgangsmåte ved belegging av flytende eller faste partikler med et polymermateriale i ikke-vandige opplosningsmiddelsystemer, hvor forst partiklene dispergeres i en opplSsning av polymeren i et organisk opplosningsmiddel, og det derpå til denne opplosning tilsettes en organisk væske som er et ikke-opplosningsmiddel for de nevnte partikler og for den nevnte- polymer, men er blandbar med det nevnte opplosningsmiddel, hvorved polymeren bringes til å utskilles fra oppløsningen og avsette seg på overflaten av de dispergerte partikler, kjennetegnet ved at det under tilsetning åv ikke-opplosningsmidlet langsomt tilsettes et mineralsk silikatpulver hvis partikkelstorrelse er mindre enn 50 mikron, i en samlet mengde på minst 2 vektdeler, per vektdel utskilt polymer, hvorved det oppnåes belagte partikler med forminsket tendens til agglomerering. According to the present invention, a method is provided for coating liquid or solid particles with a polymer material in non-aqueous solvent systems, where the particles are first dispersed in a solution of the polymer in an organic solvent, and an organic liquid is then added to this solution which is a non-solvent for the said particles and for the said polymer, but is miscible with the said solvent, whereby the polymer is caused to separate from the solution and deposit on the surface of the dispersed particles, characterized in that during the addition of non- the solvent is slowly added to a mineral silicate powder whose particle size is less than 50 microns, in a total amount of at least 2 parts by weight, per part by weight of secreted polymer, whereby coated particles with a reduced tendency to agglomerate are obtained.
De gunstigste konsentrasjoner av de forskjellige polymere i The most favorable concentrations of the various polymers i
de aktuelle opplSsningsmidlene og de mengder ikke-opplosningsmidler som behoves for å utskille polymeren, bestemmes lett ved forhåndsfor-sok, altså i fravær av partikler. Det kan anvendes både homopolymere the appropriate solvents and the amounts of non-solvents needed to separate the polymer are easily determined by preliminary testing, i.e. in the absence of particles. Both homopolymers can be used
og kopolymere, slik som naturlig og syntetisk gummi, cellulosederi-vater, styrenholdige polymere, polyetylen, polypropylen, polybutylen, polyvinylacetat, polyvinylklorid og polyvinylfluorid, kfr. nedenstående tabell. and copolymers, such as natural and synthetic rubber, cellulose derivatives, styrene-containing polymers, polyethylene, polypropylene, polybutylene, polyvinyl acetate, polyvinyl chloride and polyvinyl fluoride, see the table below.
Organiske opplosningsmidler som kan anvendes i fremgangsmåten ifolge foreliggende oppfinnelse, er klorerte og aromatiske hydrokar-boner, f.eks. metylenklorid og trikloretylen, benzen, xylen og toluen; ketoner og alkoholer. Organic solvents that can be used in the method according to the present invention are chlorinated and aromatic hydrocarbons, e.g. methylene chloride and trichlorethylene, benzene, xylene and toluene; ketones and alcohols.
Brukbare ikke-opplosningsmidler er f.eks. petroleter og n-heksan, cykloheksan; etanol og propanol, og også flytende polymerer, f. eks. flytende polybutadien og isopropyleter. Usable non-solvents are e.g. petroleum ether and n-hexane, cyclohexane; ethanol and propanol, and also liquid polymers, e.g. liquid polybutadiene and isopropyl ether.
Opplosningsmidlene og ikke-opplosningsmidlene må være indif-ferente like overfor de partikler som skal belegges. The solvents and non-solvents must be equally indifferent to the particles to be coated.
Illustrerende kombinasjoner av polymere, opplosningsmidler Illustrative combinations of polymeric solvents
og ikke-opplosningsmidler er: and non-solvents are:
Som sagt kan både faste og flytende partikler belegges ved As said, both solid and liquid particles can be coated with wood
fremgangsmåten ifolge oppfinnelsen. Dé faste partikler, fortrinnsvis i finpulverisert form, kan f.eks. være farmasøytiske forbindelser, fargestoffer, gjodningsmidler eller ugressg^ifter. De flytende partikler og dråper omfatter vann, fortynnet syre og fortynnede alkaliopplosninger og dispersjoner av fargestoffer, reaksjonsmidler, farmasoytiske forbindelser, gjodningsmidler, adhesiver og fremkallere. Metallsilikatet the method according to the invention. The solid particles, preferably in finely powdered form, can e.g. be pharmaceutical compounds, dyes, fertilizers or herbicides. The liquid particles and droplets include water, dilute acid and dilute alkali solutions and dispersions of dyes, reagents, pharmaceutical compounds, fertilizers, adhesives and developers. The metal silicate
har en partikkelstorrelse på mindre enn 50 mikron. Silikatene er bentonitt, kaolin, pimpsten, renset kiselsyreholdig jord, talkum og lignende. Av disse silikater er talkum foretrukket. has a particle size of less than 50 microns. The silicates are bentonite, kaolin, pumice, purified siliceous soil, talc and the like. Of these silicates, talc is preferred.
Det foretrukne vektforhold varierer fra ca. 2 1/2 til ca. 5 deler silikat til hver del utfelt polymer. The preferred weight ratio varies from approx. 2 1/2 to approx. 5 parts silicate to every part precipitated polymer.
Fremgangsmåten ifolge foreliggende oppfinnelse kan anvendes til å fremstille belegg som (l) beskytter de belagte, flytende eller faste partikler mot oksydativ degenerering, (2) hindrer kontakt mellom uforlikelige stoffer i en blanding, (3) undertrykker uonsket lukt og smak, (4) skaffer et preparat som vil. frigi- de belagte flytende eller faste partikler bare når det utsettes for trykk, (5) skaffer en regu-lert frigjoring av det belagte materiale i forskjellige media, slik som maven og tarmene, (6) skaffer oket stabilitet for det belagte materiale og (7) tillater håndtering av korroderende og/eller irriterende materialer. The method according to the present invention can be used to produce coatings which (1) protect the coated, liquid or solid particles against oxidative degeneration, (2) prevent contact between incompatible substances in a mixture, (3) suppress unwanted odor and taste, (4) obtains a preparation that will. release coated liquid or solid particles only when subjected to pressure, (5) provide a regulated release of the coated material in various media, such as the stomach and intestines, (6) provide increased stability for the coated material and ( 7) allows the handling of corrosive and/or irritating materials.
Eksempel 1 Example 1
Det fremstilles en etanolopplosning av en styren-maleinsyre-kopolymer som inneholder 10 vektprosent kopolymer. An ethanol solution of a styrene-maleic acid copolymer containing 10 percent by weight of copolymer is prepared.
Opplosningen omrores, og isopropyleteren tilsettes dråpevis inntil den forste bestående uklarhet inntrer. Metylprednisolon tilsettes. Talkumen tilsettes langsomt i små porsjoner under tilsetning av resten av isopropyleteren. De belagte partikler koaliserer ikke og fjernes lett ved filtrering. De vaskes med tilstrekkelig mengde isopropyleter og torkes ved romtemperatur.. Produktet er et fint hvitt pulver. "Det oppviser gradvis frigjoring av metylprednisolon i pH 7»5 bufferopplosning. The solution is stirred, and the isopropyl ether is added dropwise until the first persistent turbidity appears. Methylprednisolone is added. The talc is added slowly in small portions while adding the rest of the isopropyl ether. The coated particles do not coalesce and are easily removed by filtration. They are washed with a sufficient amount of isopropyl ether and dried at room temperature. The product is a fine white powder. "It exhibits gradual release of methylprednisolone in pH 7»5 buffer solution.
Eksempel 2 Example 2
Polymeropplosningen omrores ved romtemperatur, og n-heksan tilsettes dråpevis til en totalmengde på 4»5 ml« Metylprednisolon blir deretter rort i, og n-heksanen tilsettes fortsatt til en total mengde på 28 ml, og dette ledsages av langsom p>orsjonsvis tilsetning av talkum. Det belagte produkt filtreres og vaskes med n-heksan og torkes ved romtemperatur og atmosfæretrykk. Det torre produkt males i en morter til et hvitt granulert pulver. Den aktive bestanddel frigjores litt etter litt i buffrede væsker. The polymer solution is stirred at room temperature and n-hexane is added dropwise to a total amount of 4"5 ml". talc. The coated product is filtered and washed with n-hexane and dried at room temperature and atmospheric pressure. The dry product is ground in a mortar to a white granular powder. The active ingredient is released little by little in buffered liquids.
Eksempel 3 Example 3
En opplosning av 5 g cellulose-acetobutrat tilberedes i 100 ml metyletylketon ved ca. 65°C. 1,25 g to-basisk kalsiumfosfat dispergeres i denne opplosning under tilstrekkelig omroring til å holde fosfatforbindelsen jevnt blandet. Under omroring og ved en temperatur på ca. 25°C, tilsettes isopropyleter. Det tilsettes 12,5 g finpulverisert bentonitt langsomt i små mengder under tilsetning av isopropyleter. Når konsentrasjonen av eteren når ca. 40 volumprosent, utskilles en cellulose-acetobutyratrik fase som belegger fosfatforbindelsen. Deretter fraskilles de belagte partikler ved sentrifugering, de vaskes grundig med isopropyleter og får så torke. Det fås derved et pulver som er et belagt fosfatprodukt og er egnet for bruk som et gjodnings-middel som frigjores langsomt. A solution of 5 g of cellulose acetobutrate is prepared in 100 ml of methyl ethyl ketone at approx. 65°C. 1.25 g of dibasic calcium phosphate is dispersed into this solution with sufficient agitation to keep the phosphate compound evenly mixed. While stirring and at a temperature of approx. 25°C, isopropyl ether is added. 12.5 g of finely powdered bentonite is slowly added in small quantities while adding isopropyl ether. When the concentration of the ether reaches approx. 40% by volume, a cellulose-acetobutyrate-rich phase is separated which coats the phosphate compound. The coated particles are then separated by centrifugation, they are washed thoroughly with isopropyl ether and then allowed to dry. A powder is thereby obtained which is a coated phosphate product and is suitable for use as a fertiliser, which is released slowly.
Eksempel 4 Example 4
En opplosning av 10 g benzylcellulose i 300 ml trikloretylen fremstilles ved ca. 40°C og avkjoles til ca. 10°C. 80 g natrium-(2,4-diklorfenoksy)acetat tilsettes systemet under god omroring. Under omroring og med temperaturen holdt ved ca. 10°C, tilsettes propanol. Dette ledsages av langsom porsjonsvis tilsetning av findelt kaolin i en total mengde på 25 g. Når konsentrasjonen av propanol når ca. 50 volumprosent, oppstår det en benzylcelluloserik fase og acetatet belegges. Deretter fraskilles det fasebelagte materiale ved sentrifugering, vaskes grundig med propanol, og tillates å torke. Det fås et benzylcellulosebelagt pulver som er egnet for bruk ved ugresskontroll ved langsom frigjoring. A solution of 10 g of benzyl cellulose in 300 ml of trichloroethylene is prepared at approx. 40°C and cooled to approx. 10°C. 80 g of sodium (2,4-dichlorophenoxy)acetate are added to the system with good stirring. While stirring and with the temperature maintained at approx. 10°C, propanol is added. This is accompanied by the slow, portion-wise addition of finely divided kaolin in a total amount of 25 g. When the concentration of propanol reaches approx. 50% by volume, a phase rich in benzyl cellulose occurs and the acetate is coated. The phase-coated material is then separated by centrifugation, washed thoroughly with propanol, and allowed to dry. A benzyl cellulose coated powder is available which is suitable for use in slow release weed control.
Eksempel 5 Example 5
Det fremstilles et etylcellulosebelagt vannopploselig fargestoff på folgende måte: 5 g etylcellulose opploses i en blanding av 100 ml xylen og 20 ml etanol. l/2 g alizarin-cyanin fargestoff dispergeres i oppløs-ningen. 125 ml n-heksan tilsettes dråpevis, og det skilles ut en etyl-celluloserik fase som belegger det gronne fargestoff. Dette ledsages av langsom porsjonsvis tilsetning av renset silisiumholdig jord i en total mengde på 15 g. De belagte fargestoffpartikler skilles ut ved filtrering, vaskes med n-heksan og vakuumtorkes. An ethyl cellulose-coated water-soluble dye is prepared in the following way: 5 g ethyl cellulose is dissolved in a mixture of 100 ml xylene and 20 ml ethanol. 1/2 g of alizarin-cyanine dye is dispersed in the solution. 125 ml of n-hexane is added dropwise, and an ethyl-cellulose-rich phase is separated which coats the green dye. This is accompanied by slow portionwise addition of purified siliceous soil in a total amount of 15 g. The coated dye particles are separated by filtration, washed with n-hexane and vacuum dried.
Eksempel 6 Example 6
Det fremstilles en opplosning av 5 g celluloseacetobutrat i 100 ml metyletylketon. De belagte fargestoffpartikler fra eksempel 5 dispergeres i denne opplosning ved ca. 20°C. Isopropyleter settes til en konsentrasjon på ca. 4-0$ og bevirker utskilling av en cellulose-acetobutyratrik fase. Dette ledsages av langsom porsjonsvis tilsetning av 20 g talkum. Den nevnte fase danner et ekstra belegg på de etylcellulose-forbelagte fargestoffpartikler. De dobbeltbelagte partikler utvinnes ved sentrifugering, vaskes med isopropyleter og sproytes på papirsubstrat. Anvendelse av trykk på substratet gir synlig indikasjon på fargestoff-frigjoring. A solution of 5 g of cellulose acetobutrate in 100 ml of methyl ethyl ketone is prepared. The coated dye particles from example 5 are dispersed in this solution at approx. 20°C. Isopropyl ether is added to a concentration of approx. 4-0$ and causes separation of a cellulose-acetobutyrate-rich phase. This is accompanied by the slow addition of 20 g of talc in portions. The mentioned phase forms an additional coating on the ethyl cellulose-precoated dye particles. The double-coated particles are recovered by centrifugation, washed with isopropyl ether and sprayed onto a paper substrate. Applying pressure to the substrate gives a visible indication of dye release.
Istedenfor 5 g cellulose-acetobutyrat kan man anvende en blanding av 2,5 g cellulose-acetobutyrat og 2,5 g polyvinylacetat med lignende resultater. Instead of 5 g of cellulose acetobutyrate, a mixture of 2.5 g of cellulose acetobutyrate and 2.5 g of polyvinyl acetate can be used with similar results.
Eksempel 7 Example 7
15 ml 0,5$ (som vekt/volum) av en vandig opplosning av ama-rant settes, under kraftig omroring, til 90 ml av en 5,0$-ig (beregnet som vekt/volum) opplosning av celluloseacetatbutyrat i metyletylketon. Denne blanding sendes deretter tre ganger gjennom en håndhomogenisator. Det tilsettes samtidig tilstrekkelig ekstra butyratopplosning til å fremstille 150 ml emulsjon. Det tilsettes ekstra 15 ml amarantopplos-ning på dette tidspunkt. 15 ml 0.5% (as weight/volume) of an aqueous solution of amaranth is added, with vigorous stirring, to 90 ml of a 5.0% (calculated as weight/volume) solution of cellulose acetate butyrate in methyl ethyl ketone. This mixture is then passed three times through a hand homogenizer. Sufficient extra butyrate solution is added at the same time to produce 150 ml of emulsion. An extra 15 ml amaranth solution is added at this point.
Emulsjonssystemet tilsettes isopropyleter ved ca. 25°C i små porsjoner under omroring. Det bemerkes en oket uklarhet når det er tilsatt 100 ml. At vanndråpene derved er blitt belagt, kan bekreftes ved mikroskopisk undersøkelse. Isopropyl ether is added to the emulsion system at approx. 25°C in small portions while stirring. An increased cloudiness is noted when 100 ml is added. That the water droplets have thereby been coated can be confirmed by microscopic examination.
Deretter tilsettes ekstra 10 ml isopropyleter under omroring for å gi mer utskilling. Dette ledsages av langsom porsjonsvis tilsetning av kaolin i en total mengde på 10 g. Blandingen får så av-kjole langsomt uten omroring. De belagte partikler fraskilles ved sentrifugering, vaskes med isopropyleter og torkes i vakuum. An extra 10 ml of isopropyl ether is then added with stirring to give more separation. This is accompanied by the slow, portion-wise addition of kaolin in a total amount of 10 g. The mixture is then slowly de-coated without stirring. The coated particles are separated by centrifugation, washed with isopropyl ether and dried in vacuum.
Eksempel 8 Example 8
Del 1 - Vandig opplosning Part 1 - Aqueous solution
Del 2 - Polymeropplosning Part 2 - Polymer dissolution
Den vandige opplosning dispergeres i polymeropplosningen. The aqueous solution is dispersed in the polymer solution.
Langsom tilsetning av petroleter sammen med 6,25 g pimpsten i små porsjoner gir små etylcellulosebelagte kapsler av den vandige opplosning. Kapslene vaskes med petroleter ved dekantering og sproytes på et film-lag og danner et filmbelegg som brytes ved trykk. Slow addition of petroleum ether along with 6.25 g of pumice in small portions yields small ethyl cellulose coated capsules of the aqueous solution. The capsules are washed with petroleum ether by decanting and sprayed onto a film layer, forming a film coating that breaks under pressure.
Eksempel 9 Example 9
Del 1 - Vandig opplosning Part 1 - Aqueous solution
Del 2 - Polymeropplosning Part 2 - Polymer dissolution
Den vandige opplosning dispergeres i polymeropplosningen. Langsom tilsetning av petroleter, ledsaget av langsom porsjonsvis tilsetning av 12j5 g kaolin, bringer den polymere til å utskilles som en flytende fase som belegger de dispergerte vandige partikler. De belagte partikler vaskes med mer petroleter, fraskilles og torkes. The aqueous solution is dispersed in the polymer solution. Slow addition of petroleum ether, accompanied by slow portionwise addition of 12j5 g of kaolin, causes the polymer to separate as a liquid phase which coats the dispersed aqueous particles. The coated particles are washed with more petroleum ether, separated and dried.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3234177A DE3234177C2 (en) | 1982-09-15 | 1982-09-15 | Method for lowering a platform of an artificial island on a supporting structure and device for carrying out the method |
Publications (3)
Publication Number | Publication Date |
---|---|
NO833035L NO833035L (en) | 1984-03-16 |
NO155298B true NO155298B (en) | 1986-12-01 |
NO155298C NO155298C (en) | 1987-03-11 |
Family
ID=6173264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO833035A NO155298C (en) | 1982-09-15 | 1983-08-23 | PROCEDURE FOR REDUCING THE TIRE ON AN ARTIFICIAL OEY DOWN ON A CARBON CONSTRUCTION, AND IMPLEMENTATION FOR IMPLEMENTING THE PROCEDURE. |
Country Status (2)
Country | Link |
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DE (1) | DE3234177C2 (en) |
NO (1) | NO155298C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2744150B1 (en) * | 1996-01-30 | 1998-04-03 | Elf Aquitaine | DEVICE FOR MOUNTING AN ELEMENT ON A SUPPORT, PARTICULARLY FOR MOUNTING A BRIDGE ON THE SUPPORT OF A SEA OIL INSTALLATION |
EP2501861B1 (en) * | 2009-11-18 | 2017-04-12 | Robert Bosch GmbH | Method for controlling an offshore platform |
EP2501862B1 (en) * | 2009-11-18 | 2018-08-15 | Robert Bosch GmbH | Offshore platform and method for controlling an offshore platform |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3008585A1 (en) * | 1980-03-06 | 1981-09-17 | Deutsche Babcock Ag, 4200 Oberhausen | DEVICE FOR LIFTING AND LOWERING A FLOATING OFFSHORE PLATFORM |
DE3038654C2 (en) * | 1980-10-13 | 1983-04-07 | Bilfinger + Berger Bauaktiengesellschaft, 6800 Mannheim | Method of installing an artificial island |
-
1982
- 1982-09-15 DE DE3234177A patent/DE3234177C2/en not_active Expired
-
1983
- 1983-08-23 NO NO833035A patent/NO155298C/en unknown
Also Published As
Publication number | Publication date |
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DE3234177C2 (en) | 1985-12-05 |
DE3234177A1 (en) | 1984-03-15 |
NO833035L (en) | 1984-03-16 |
NO155298C (en) | 1987-03-11 |
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