DE1805138A1 - Fine powder of fusible polymerisable, - condensable or soluble material,using aux pow - Google Patents

Fine powder of fusible polymerisable, - condensable or soluble material,using aux pow

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Publication number
DE1805138A1
DE1805138A1 DE19681805138 DE1805138A DE1805138A1 DE 1805138 A1 DE1805138 A1 DE 1805138A1 DE 19681805138 DE19681805138 DE 19681805138 DE 1805138 A DE1805138 A DE 1805138A DE 1805138 A1 DE1805138 A1 DE 1805138A1
Authority
DE
Germany
Prior art keywords
powder
auxiliary
condensable
pow
polymerisable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19681805138
Other languages
German (de)
Inventor
Metzger Dr Karl B
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
METZGER DR KARL B
Original Assignee
METZGER DR KARL B
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by METZGER DR KARL B filed Critical METZGER DR KARL B
Priority to DE19681805138 priority Critical patent/DE1805138A1/en
Publication of DE1805138A1 publication Critical patent/DE1805138A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Paints Or Removers (AREA)

Abstract

Substance is worked into interstitial spaces of auxiliary powder in such amount that no cohesive film results. Material is hardened and auxiliary powder is dissolved out. Auxiliary powder can be coated with an auxiliary material before use for surface preparation of the required powder.

Description

Verfahren zur Herstellung feiner Pulver aus schmelzbaren, löslichen, SEondensierbaren oder polymerisierbaren Stoffen.Process for the production of fine powders from meltable, soluble, SEondensable or polymerizable substances.

Die Erfindung betrifft ein Verfahren zur Herstellung feiner Pulver aus schmelzbaren,löslichen,kondensierbaren oder polymerisierbaren Stoffen bei Verwendung eines Hilfspulvers.The invention relates to a method for producing fine powders of meltable, soluble, condensable or polymerizable substances when used of an auxiliary powder.

Es ist bekannt feine Pulver herzustellen durch Mahlen, durch Polymers sieren oder kondensieren in Dispersion und evtl nachträgliches Sprühtrocknen, durch Ausfällen aus Lösungen.It is known to produce fine powders by grinding, by polymers ize or condense in dispersion and possibly subsequent spray drying, through Failures from solutions.

Das hier beschriebene Verfahren benützt einen anderen Weg. ns benützt ein Hilfspulver, das andere Löslichkeitseigenschaften zeigt, als das zu gewinnende Pulver. Die Stoffe, die feinverteilt werden sollen, werden entweder mit einem Hilfspulver im Schmelzfluss verknetet, oder ihre Lösung wird mit einem Hilfspulver verknetet, oder es werden die flüssigen Monomeren mit einem Hilfspulver verknetet, oder gasförmige MoÜomere werdendurch dienen Katalysator1 der auf dem Hilfspulver niedergeschlagen wurde, zwischen den Körnern des Hilfspulvers polymerisiert.The procedure described here uses a different route. ns used an auxiliary powder that shows different solubility properties than that to be obtained Powder. The substances that are to be finely divided are either mixed with an auxiliary powder kneaded in the melt flow, or their solution is kneaded with an auxiliary powder, or the liquid monomers are kneaded with an auxiliary powder, or gaseous ones MoÜomers are deposited on the auxiliary powder by serving as a catalyst was polymerized between the grains of the auxiliary powder.

I-fach dem Erstarren des geschmolzenen Stoffes, nach Kondensieren oder Polymerisieren der monomeren oder nach dem Verdampfen des Lösungsmittels wird der entstandene buchen aus Hilfspulver und gewünschtem Pulver gemahlen, das Eilfspulver herausgelöst und das gewünschte Pulver gewaschen und getrocknet.I times the solidification of the molten substance after condensation or polymerizing the monomers or after evaporation of the solvent The resulting beech is ground from auxiliary powder and the desired powder, the Eilfspulver dissolved out and the desired powder washed and dried.

Wesentlich ist bei diesem Verfahren, dass das Volumenverhältnis llilfspulver zu gewünschtem Pulver so gewählt wird, dass das gewünschte Pulver keinen zusammenhängenden Film zu bilden vermag, sondern sich in den Zwischenräumen des Hilfspulvers befindet und dadurch in seiner Gestalt und Grösse bestimmt wird. Es kann sich als zweckmässig erweisen, besonders beim Arbeiten im Schmelzfluss, ein Schutzgas zu benützen, um die oberflächige Oxydation des gewünschten Pulvers zu vermeiden, soweit dies nicht - um das Pulver hydrophil zu machen- erwünscht ist0 Um bin..chlüsze von Hilfspulver zu entfernen und gleichzeitig die Gestalt des gewünschten Pulvers zu beeinflussen, ist es zweckmässig das Pulver geraischoder das ausgewaschene Pulver in einer Flüssigkeit, welche nur das ilfspulver löst, über den Sinterpunkt des gewünschten Pulvers zu erhitzen.In this process, it is essential that the volume ratio of auxiliary powder to the desired powder is selected so that the desired powder is not able to form a coherent film, but is located in the interstices of the auxiliary powder and is thereby determined in its shape and size. It can prove to be useful, especially when working in the melt flow, to use a protective gas in order to avoid the surface oxidation of the desired powder, as long as this is not desired - in order to make the powder hydrophilic and at the same time to influence the shape of the desired powder, it is expedient to heat the powder or the washed-out powder in a liquid which only dissolves the auxiliary powder above the sintering point of the desired powder.

ft toic, die feinverteilt hergestellt werden können sind z.B. zu nennen: Phenolharze, Epoxydharze Polyacrylate, Polyäthylen, polyvinylchlorid, Polystyrol und Mischpolymerisate von Kunststoffen oder deren Mischungen schwefel, Metalle etc.ft toic, which can be produced in finely divided form, include, for example: Phenolic resins, Epoxy resins, polyacrylates, polyethylene, polyvinyl chloride, polystyrene and copolymers of plastics or their mixtures, sulfur, metals etc.

Als Ifilfspulver kommen infrage: Kochsalz, liatriumsul.fat, das bei Kondensationen Wasser aufzunehmen vermag, Kalziumkarbonat, das mit Säuren herausgelöst wird. Durch Verwendung von Broncepulver können die feinverteilten Stoffe flächige Gestalt annehmen. Das blättchenförmige Metall wird durch Säuren herausgelöst.The following auxiliary powders can be used: table salt, liatrium sulphate, which is able to absorb water in the event of condensation, calcium carbonate, which is dissolved out with acids. By using bronze powder, the finely divided substances can take on a flat shape. That flaky metal is dissolved out by acids.

Beispiell : 150 g Titandioxid, Rutil, Korngrösse 0,25 - 0,5 mü werden mit 500 g Kochsalz einer Korngrösse 1- 5mü innig gemischt und mit 50 g Epoxidharz lool der Firma Shell in 200gEssigester verknetet. Der Essigester wird unter kneten abgedampft und die verbleibende Masse 20 Iqinuten auf 220 0C erhitzt. Nach dem Abkühlen wird pulverisiert und das Kochsalz herausgelöst. Das pigmentierte, feinvertei A lViann in Kunststoffe und Lacke gut eingearbeitet werden. Bleibt man beim Erhitzen unter 14o 0C so kann man das entstehende weiße Pulver. elektrostatisch verspritzen und auf Metallgegenständen bei 2200C aushärten.For example: 150 g of titanium dioxide, rutile, grain size 0.25-0.5 mu are intimately mixed with 500 g common salt with a grain size 1-5 mu and kneaded with 50 g epoxy resin from Shell in 200 g vinegar ester. The ethyl acetate is evaporated off while kneading and the remaining mass Heated to 220 ° C. for 20 minutes. After cooling, it is pulverized and the table salt is dissolved out. The pigmented, finely dispersed alloy can be incorporated well into plastics and paints. If you stay below 14o 0C while heating, you can get the resulting white powder. Electrostatically spray and cure on metal objects at 2200C.

Beispiel 2 ; 10 g Polyäthylen werden mit 90 g feinstgemahlenem Kochsalz in einem auf 1400C gehaltenen Schneckenkneter innigst unter Schutzgas verknetet. Es resultiert ein brüchiges Pulver, das feingemahlen 0 und dann in einem Autoklaven mit Wasser auf 140°C erhitzt wird. Nach dem Abkühlen und Auswaschen wird ein sehr feines und rieselfähiges Pulver aus Polyäthylen erhalten.Example 2; 10 g of polyethylene are mixed with 90 g of finely ground table salt kneaded intimately under protective gas in a screw kneader maintained at 1400C. The result is a brittle powder that is finely ground and then placed in an autoclave is heated to 140 ° C with water. After cooling and washing it becomes a very obtained fine and free-flowing polyethylene powder.

Claims (1)

Patentanspruch: Verfahren zum erstellen feiner Pulver aus schmelzbaren, polymerisierbaren, kondensierbaren oder löslichen Stoffen dadurch gekennzeichnet, dass man diese Stoffe in die Zwischenräume eines Eilfspulvers in solcher enge einarbeitet, dass kein zusammenhängender Film entsteht, die eingearbeiteten Stoffe verfestigt und anschliessend das Hilfspulver auflöst, wobei das Hilfspulver zur Cberflächenpräparation des gewünschten Pulvers vor dem Vermischen mit -einem Hilfsstoff überzogen werden kann.Claim: Process for creating fine powders from meltable, polymerizable, condensable or soluble substances, characterized in that these substances are placed in the interstices of an Eilfspulvers incorporated in such a close manner that no cohesive film is formed, the incorporated substances solidify and then the auxiliary powder dissolves, whereby the auxiliary powder can be coated with an auxiliary substance for surface preparation of the desired powder before mixing.
DE19681805138 1968-10-25 1968-10-25 Fine powder of fusible polymerisable, - condensable or soluble material,using aux pow Pending DE1805138A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19681805138 DE1805138A1 (en) 1968-10-25 1968-10-25 Fine powder of fusible polymerisable, - condensable or soluble material,using aux pow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681805138 DE1805138A1 (en) 1968-10-25 1968-10-25 Fine powder of fusible polymerisable, - condensable or soluble material,using aux pow

Publications (1)

Publication Number Publication Date
DE1805138A1 true DE1805138A1 (en) 1970-07-02

Family

ID=5711500

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681805138 Pending DE1805138A1 (en) 1968-10-25 1968-10-25 Fine powder of fusible polymerisable, - condensable or soluble material,using aux pow

Country Status (1)

Country Link
DE (1) DE1805138A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044051A1 (en) * 1980-07-15 1982-01-20 Akzo GmbH Porous polymer powder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044051A1 (en) * 1980-07-15 1982-01-20 Akzo GmbH Porous polymer powder

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