DE3205315A1 - Flux for use in soft soldering - Google Patents

Flux for use in soft soldering

Info

Publication number
DE3205315A1
DE3205315A1 DE19823205315 DE3205315A DE3205315A1 DE 3205315 A1 DE3205315 A1 DE 3205315A1 DE 19823205315 DE19823205315 DE 19823205315 DE 3205315 A DE3205315 A DE 3205315A DE 3205315 A1 DE3205315 A1 DE 3205315A1
Authority
DE
Germany
Prior art keywords
flux
acid
isopropyl alcohol
pure
pure rosin
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.)
Withdrawn
Application number
DE19823205315
Other languages
German (de)
Inventor
Hanspeter Ing. Thumm (grad.), 8000 München
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19823205315 priority Critical patent/DE3205315A1/en
Publication of DE3205315A1 publication Critical patent/DE3205315A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
    • B23K35/3618—Carboxylic acids or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
    • B23K35/3613—Polymers, e.g. resins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)

Abstract

Flux consisting of a combination of pure colophonium with the three dicarboxylic acids adipic acid, salicylic acid and glutaric acid as activators, together with the solvent isopropyl alcohol. As a result of combining these activators, a uniformly good soldering action is achieved on all the soft-solderable materials encountered in practise.

Description

Flußmittel zur Verwendung beim Weichlöten.Flux for use in soldering.

Die Erfindung betrifft ein Flußmittel zur Verwendung beim Weichlöten, bestehend aus Reinkolophonium und einem Zusatz aus einem metalloxidlösenden, organischen, halogenfreien Aktivierungszusatz und einem Lösungsmittel.The invention relates to a flux for use in soft soldering, consisting of pure rosin and an additive of an organic, metal oxide-dissolving, halogen-free activation additive and a solvent.

Beim Löten muß dafür Sorge getragen werden, daß die zu verbindenden Werkstücke durch das Lot einwanifrei benetzt werden. Nur so kann eine ausreichende Festigkeit der Verbindung erreicht werden. Zur Verbesserung der Benetzung werden übLicherweise Flußmittel verwendet, die die auf der Metalloberfläche befindlichen Oxide lösen.When soldering care must be taken that the to be connected Workpieces can be moistened in a non-invasive manner by the solder. Only in this way can it be sufficient Strength of the connection can be achieved. To be used to improve wetting Usually used flux, which is located on the metal surface Dissolve oxides.

Es ist bekannt, als P'lußmittel Reinkolophonium zu verwenden, dem zur Erhöhung der Säurewirkung als Aktivatoren organische Säuren zugesetzt werden.It is known to use pure rosin as the flux organic acids are added as activators to increase the acidity.

Flußmittel auf Kolophoniumbasis für die Anwendung in der Elektrotechnik, Elektronik, Miniaturtechnik und gedruckten Schaltungen dürfen nach DIN 8511, Blatt 2 keine Korrosion verursachen und den Isolationswiderstand von Leiterplatten nicht unzulässig vermindern (DIN 8527).Flux based on rosin for use in electrical engineering, Electronics, miniature technology and printed circuits are allowed according to DIN 8511, sheet 2 do not cause corrosion and the insulation resistance of printed circuit boards does not reduce impermissibly (DIN 8527).

Weitere Forderungen sind die Erzielung guter Lötergebnisse und z. B. beim automatisierten Löten von Baugruppen die Verhinderung von Brücken- und Zapfenbildung.Further requirements are the achievement of good soldering results and z. B. the prevention of bridges and pegs in the automated soldering of assemblies.

Ferner sollen die Rückstände nach dem Löten möglichst wenig kleben und gegebenenfalls bei Weiterverarbeitung der Baugruppen gut entfernbar sein.Furthermore, the residues should stick as little as possible after soldering and, if necessary, be easily removable during further processing of the assemblies.

Die auf dem Markt erhältlichen Flußmittel, z. B. vom Typ F-S8X 32, erzielen ihre beste Lötwirkung in der Regel mit dem leicht flüchtigen Äthylalkohol als Lösungsmittel.The fluxes available on the market, e.g. B. of the type F-S8X 32, usually achieve their best soldering effect with the volatile Ethyl alcohol as a solvent.

Wegen Eindickungsgefahr sind bei diesem Flußmittel in kurzen Zeitabständen Kontrollen und Korrekturen der Flußmitteldichte erforderlich.Because of the risk of thickening, use this flux at short intervals Flux density controls and corrections required.

Der Erfindung liegt die. Aufgabe zugrunde, ein Flußmittel der eingangs definierten Art anzugeben, mit dem ein Kompromiß zwischen höchster Aktivität und somit lötunterstützender Wirkung und möglichst neutralem Verhalten bzw. leichter Entfernbarkeit der Rückstände verwirklicht werden kann.The invention lies in the. Task based on a flux of the initially defined type, with which a compromise between highest activity and thus a soldering-supporting effect and preferably neutral behavior or easier Removability of residues can be realized.

Diese Aufgabe wird dadurch gelöst, daß das Flußmittel aus einer Kombination von Reinkolophonium mit den drei Dicarbonsäuren Adipinsäure, Salicylsäure und Glutarsäure als Aktivatoren mit einem Lösungsmittel, vorzugsweise Isopropylalkohol, besteht. Durch die Kombination dieser Aktivatoren wird an allen in der Praxis üblichen weichlötbaren Werkstoffen eine gleichmäßig gute Lötwirkung erzielt, während andere bekannte Flußmittel, z. B. auf Messing, völlig unzureichend wirken. Ein weiterer Vorteil der Erfindung besteht darin, daß eine Überwachung.This object is achieved in that the flux consists of a combination of pure rosin with the three dicarboxylic acids adipic acid, salicylic acid and glutaric acid as activators with a solvent, preferably isopropyl alcohol. The combination of these activators means that they can all be soft-soldered in practice Materials achieve a consistently good soldering effect, while other known fluxes, z. B. on brass, act completely inadequate. Another advantage of the invention is that a surveillance.

des Flußmittels im Vergleich zu Flußmitteln mit Äthylalkohol als Lösungsmittel seltener erforderlich ist.of the flux compared to fluxes with ethyl alcohol as solvent is required less often.

Nach einer Weiterbildung der Erfindung hat ein Flußmittel, das vorwiegend zum automatisierten Löten von Leiterplatten geeignet ist, folgende Zusammensetzung: 115 g Reinkolophonium 15 g Glutarsäure 10 g Salicylsäure 10 g Adipinsäure 1 1 Isopropylalkohol Modifikationen des Flußmittels für spezielle Anwendungsfälle, z. B. zum Verzinnen von stark oxidierten Teilen oder zur Erzielung einer besonders geringen Klebeneigung der Rückstände, sind sowohl durch Änderung des Aktivatorgehaltes als auch des Reinkolophbniumgehaltes möglich.According to a development of the invention, a flux that predominantly is suitable for the automated soldering of printed circuit boards, the following composition: 115 g pure rosin 15 g glutaric acid 10 g salicylic acid 10 g adipic acid 1 1 isopropyl alcohol Modifications of the flux for special applications, e.g. B. for tinning of heavily oxidized parts or to achieve a particularly low tendency to stick the Residues are caused both by changing the activator content and the pure rosin content possible.

Ein Flußmittel, das sich insbesondere für stark oxidierte Teile eignet, kann nach der Erfindung folgendermaßen zusammengesetzt sein: 1?0 g Reinkolophonium 20 g Glutarsäure 30 g Salicylsäure 30 g Adipinsäure 1 l Isopropylalkohol Zur Erzielung besonders geringer Klebeneigung der Rückstände kann nach der Erfindung das Flußmittel aus folgenden Bestandteilen aufgebaut sein: 60 g Reinkolophonium 10 g Glutarsäure 15 g Salicylsäure 15 g Adipinsäure 1 1 Isopropylalkohol 4 PatentansprücheA flux that is particularly suitable for heavily oxidized parts, can be composed according to the invention as follows: 1? 0 g pure rosin 20 g glutaric acid 30 g salicylic acid 30 g adipic acid 1 l isopropyl alcohol To achieve According to the invention, the flux can have a particularly low tendency for the residues to stick be composed of the following components: 60 g pure rosin 10 g glutaric acid 15 g salicylic acid 15 g adipic acid 1 1 isopropyl alcohol 4 claims

Claims (4)

Patentansprüche.Claims. 2 Flußmittel zur Verwendung beim Weichlöten, bestehend aus Reinkolophonitim und einem Zusatz aus einem metalloxidlösenden, organischen, halogenfreien Aktivator und einem Lösungsmittel, d a d u r c h g e k e n n -z e i c h n e t , daß das Flußmittel aus einer Kombination von Reinkolophonium mit den drei Dicarbonsäuren Adipinsäure, Salicylsäure und Glutarsäure als Aktivatoren mit einem Lösungsmittel, vorzugsweise Isopropylalkohol, besteht.2 flux for use in soft soldering, consisting of pure rosin and an additive of an organic, halogen-free activator that dissolves metal oxide and a solvent, d u r c h e k e n n -z e i c h n e t, that the flux from a combination of pure rosin with the three dicarboxylic acids adipic acid, Salicylic acid and glutaric acid as activators with a solvent, preferably Isopropyl alcohol. 2. Flußmittel nach Anspruch 1, d a d u r c h g e -k e n n z e i c h n e t , daß das Flußmittel folgende Zusammensetzung auSweist: 115 g Reinkolophonium 15 g Glutarsäure 10 g Salicylsäure 10 g Adipinsäure 1 1 Isopropylalkohol 2. Flux according to claim 1, d a d u r c h g e -k e n n z e i c That means that the flux has the following composition: 115 g pure rosin 15 g glutaric acid 10 g salicylic acid 10 g adipic acid 1 1 isopropyl alcohol 3. Flußmittel nach Anspruch 1, d a d u r c h g e -k e n n z e i c h n e t , daß das Flußmittel folgende Zusammensetzung auSweist: 120 g Reinkolophonium 20 g Glutarsäure 30 g Salicylsäure 30 g Adipinsäure 1 l Isopropylalkohol 3. Flux according to claim 1, d a d u r c h g e -k e n n n z e i c h n e t that the flux the following composition shows: 120 g pure rosin 20 g glutaric acid 30 g salicylic acid 30 g of adipic acid 1 liter of isopropyl alcohol 4. Flußmittel -nach Anspruch 1, d a d u r c h g e -k e n n z e i c h n e t , daß das Flußmittel folgende Zusammensetzung au##eist: 60 g Reinkolophonium 10 g Glutarsäure 15 g Salicylsäure 15 g Adipinsäure 1 1 Isopropylalkohol4. Flux -according to claim 1, d a d u r c h g e -k e n n n e t that the flux has the following composition: 60 g pure rosin 10 g glutaric acid 15 g salicylic acid 15 g adipic acid 1 1 isopropyl alcohol
DE19823205315 1982-02-15 1982-02-15 Flux for use in soft soldering Withdrawn DE3205315A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823205315 DE3205315A1 (en) 1982-02-15 1982-02-15 Flux for use in soft soldering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823205315 DE3205315A1 (en) 1982-02-15 1982-02-15 Flux for use in soft soldering

Publications (1)

Publication Number Publication Date
DE3205315A1 true DE3205315A1 (en) 1983-08-25

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513424A1 (en) * 1985-04-15 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Rosin-based flux for soft-soldering metallic materials
DE3713553C1 (en) * 1987-04-23 1988-09-15 Alpha Grillo Lotsysteme Gmbh Halogen-free flux mixture and its use
WO1990011867A1 (en) * 1989-04-11 1990-10-18 Hughes Aircraft Company Method and composition for protecting and enhancing the solderability of metallic surfaces
EP0433052A1 (en) * 1989-12-12 1991-06-19 International Business Machines Corporation Thermally dissipated soldering flux and method of use
US5145722A (en) * 1989-04-11 1992-09-08 Hughes Aircraft Company Method and composition for protecting and enhancing the solderability of metallic surfaces
EP0560861A1 (en) * 1990-12-03 1993-09-22 Motorola Inc. Tacking agent
US10830042B2 (en) 2016-09-19 2020-11-10 Minnovation Limited Cutter pick assembly with water spray assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898255A (en) * 1958-06-30 1959-08-04 Ibm Soldering flux composition
DE2126486A1 (en) * 1971-05-27 1972-12-07 Siemens Ag Soldering fluxes - based on rosin, contg acid (anhydride) activators
DE2828197A1 (en) * 1978-06-27 1980-01-03 Winchester Electronics Gmbh Halogen free colophonium based soft solder flux - also contains satd. aliphatic di:carboxylic acid, di:ethanolamine and water-miscible alkanol

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898255A (en) * 1958-06-30 1959-08-04 Ibm Soldering flux composition
DE2126486A1 (en) * 1971-05-27 1972-12-07 Siemens Ag Soldering fluxes - based on rosin, contg acid (anhydride) activators
DE2828197A1 (en) * 1978-06-27 1980-01-03 Winchester Electronics Gmbh Halogen free colophonium based soft solder flux - also contains satd. aliphatic di:carboxylic acid, di:ethanolamine and water-miscible alkanol

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513424A1 (en) * 1985-04-15 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Rosin-based flux for soft-soldering metallic materials
DE3713553C1 (en) * 1987-04-23 1988-09-15 Alpha Grillo Lotsysteme Gmbh Halogen-free flux mixture and its use
EP0288828A1 (en) * 1987-04-23 1988-11-02 alpha grillo-lötsysteme GmbH Flux mixture without halogen and its use
US4838478A (en) * 1987-04-23 1989-06-13 Alpha Grillo-Lotsysteme Gmbh Halogen-free flux mixture and use thereof
AU612075B2 (en) * 1989-04-11 1991-06-27 Raytheon Company Method and composition for protecting and enhancing the solderability of metallic surfaces
WO1990011867A1 (en) * 1989-04-11 1990-10-18 Hughes Aircraft Company Method and composition for protecting and enhancing the solderability of metallic surfaces
GR900100172A (en) * 1989-04-11 1991-09-27 Hughes Aircraft Co Method and composition for protecting and enhancing the solderability of metallic surfaces
US5145722A (en) * 1989-04-11 1992-09-08 Hughes Aircraft Company Method and composition for protecting and enhancing the solderability of metallic surfaces
TR25823A (en) * 1989-04-11 1993-09-01 Hughes Aircraft Co METAL AND SCIENCE TO PROTECT METAL SURFACES AND INCREASE THE SOLDABILITY
EP0433052A1 (en) * 1989-12-12 1991-06-19 International Business Machines Corporation Thermally dissipated soldering flux and method of use
EP0560861A1 (en) * 1990-12-03 1993-09-22 Motorola Inc. Tacking agent
EP0560861A4 (en) * 1990-12-03 1994-01-19 Motorola, Inc.
US10830042B2 (en) 2016-09-19 2020-11-10 Minnovation Limited Cutter pick assembly with water spray assembly

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Legal Events

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8139 Disposal/non-payment of the annual fee