GB1586214A

GB1586214A - Fluxes

Info

Publication number: GB1586214A
Application number: GB4382177A
Authority: GB
Original assignee: HAWK JOINTINGS Ltd
Current assignee: HAWK JOINTINGS Ltd
Priority date: 1978-05-24
Filing date: 1978-05-24
Publication date: 1981-03-18

Description

(54) FLUXES (71) We, HAWK JOINTINGS LIMITED of Dowker Street, Milnsbridge, Huddersfield in the county of York, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to fluxes of the kind used to facilitate soldering, welding, brazing, and other metal fusion techniques.

The invention provides a flux, the flux being in liquid form and stored in a container, the container having spray nozzle and means for propelling the flux out of the nozzle in the form of a spray.

The means for propelling the flux out of the nozzle preferably comprises a propellent within the container, for example in the form of a liquified or partially liquified gas.

Preferably the container is of metal with an internal coating to protect the metal from attack by the flux. It is preferred that the inside of the container is lacquered.

The flux preferably has a water base, and may contain zinc chloride and/or ammonium chloride. It may for example contain from 15% to 25% by weight of zinc chloride. It may contain from 5% to 15% by weight of ammonium chloride.

By way of example only, a specific embodiment of the invention will now be described.

A liquid flux according to the invention, for use in soldering copper and brass, comprises 21.9% zinc chloride, 9.9% ammonium chloride, and 68.2% water, all percentages being by weight. 260 grms of the flux and 140 grms of a propellent gas manufactured by I.C.I. under the Trade Name ARCTON (Registered Trade Mark) 12 are pumped into a metal cannister having a push button operated outlet nozzle, of the kind commonly known as an aerosol container. The inside of the cannister is first coated with a lacquer, to protect it from attack by the flux.

Conventional fluxes have a grease base which prevents the active ingredients of the fluxes from attacking metals to which the fluxes are applied. Consequently the fluxes have no preliminary cleaning action on the metals and it is necessary to clean the metals, e.g. with emery cloth, before the pastelike flux is smeared on to the metal by hand.

The liquid flux according to the above example Is not only more easily applied, by simply operating the spray nozzle, but also eliminates the initial manual cleaning operation.

The invention is not restricted to the details of the foregoing example. For instance, active ingredients other than zinc and ammonium chloride may be used, chosen according to the metal with which the flux is to be used. Preferably the liquid flux has a non-greasy base.

A propellent gas other than ARCON 12 may be used.

WHAT WE CLAIM IS 1. A flux, the flux being in liquid form and stored in a container, the container having a spray nozzle and means for propelling the flux out of the nozzle in the form of a spray.

2. A flux as claimed in Claim 1, in which the means for propelling the flux out of the nozzle comprises å propellent within the container.

3. A flux as claimed in Claim 2, in which the propellent comprises a liquified or partially liquified gas.

4. A flux as claimed in any one of the preceding claims in which the container is of metal.

5. A flux as claimed in Claim 4, in which the container has an internal coating to protect the metal from attack by the flux.

6. A flux as claimed in Claim 5, in which the inside of the container is lacquered.

7. A flux as claimed in any one of the preceding claims which have a water base.

8. A flux as claimed in any one of the preceding claims containing zinc chloride.

9. A flux as claimed in Claim 8, containing from 15% to 25% by weight of zinc chloride.

10. A flux as claimed in any one of the preceding claims, containing ammonium chloride.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. (54) FLUXES (71) We, HAWK JOINTINGS LIMITED of Dowker Street, Milnsbridge, Huddersfield in the county of York, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to fluxes of the kind used to facilitate soldering, welding, brazing, and other metal fusion techniques. The invention provides a flux, the flux being in liquid form and stored in a container, the container having spray nozzle and means for propelling the flux out of the nozzle in the form of a spray. The means for propelling the flux out of the nozzle preferably comprises a propellent within the container, for example in the form of a liquified or partially liquified gas. Preferably the container is of metal with an internal coating to protect the metal from attack by the flux. It is preferred that the inside of the container is lacquered. The flux preferably has a water base, and may contain zinc chloride and/or ammonium chloride. It may for example contain from 15% to 25% by weight of zinc chloride. It may contain from 5% to 15% by weight of ammonium chloride. By way of example only, a specific embodiment of the invention will now be described. A liquid flux according to the invention, for use in soldering copper and brass, comprises 21.9% zinc chloride, 9.9% ammonium chloride, and 68.2% water, all percentages being by weight. 260 grms of the flux and 140 grms of a propellent gas manufactured by I.C.I. under the Trade Name ARCTON (Registered Trade Mark) 12 are pumped into a metal cannister having a push button operated outlet nozzle, of the kind commonly known as an aerosol container. The inside of the cannister is first coated with a lacquer, to protect it from attack by the flux. Conventional fluxes have a grease base which prevents the active ingredients of the fluxes from attacking metals to which the fluxes are applied. Consequently the fluxes have no preliminary cleaning action on the metals and it is necessary to clean the metals, e.g. with emery cloth, before the pastelike flux is smeared on to the metal by hand. The liquid flux according to the above example Is not only more easily applied, by simply operating the spray nozzle, but also eliminates the initial manual cleaning operation. The invention is not restricted to the details of the foregoing example. For instance, active ingredients other than zinc and ammonium chloride may be used, chosen according to the metal with which the flux is to be used. Preferably the liquid flux has a non-greasy base. A propellent gas other than ARCON 12 may be used. WHAT WE CLAIM IS

1. A flux, the flux being in liquid form and stored in a container, the container having a spray nozzle and means for propelling the flux out of the nozzle in the form of a spray.

11. A flux as claimed in Claim 10, containing from 5% to 15% by weight of ammonium chloride.

12. A flux substantially as herein described with reference to the foregoing example.~