COMPOSITION FOR SIMULATED LEAD STRIPS

Abstract: A composition for simulated lead strips for leaded windows, which composition consists of 50 - 75 weight % binder, 5 - 15 weight % pigment, 5 - 20 weight % oil and 10 - 30 weight % filling, the binder being a polymer binder, chosen among polyvinyl alcohol based adhesives, polyurethan based adhesives and synthetic rubber based adhesives. The pigment is suitably chosen among metal pigments, bronze powder, iron oxide and graphite, or mixtures thereof. The oil consists preferably of a vegetable, drying oil, like linseed oil. The filling is suitably chosen among wood-flour, saw-dust or sand. A preferred composition consists of 65 weight % polyvinyl alcohol based adhesive, 3 weight % iron oxide, 5 weight % aluminium bronze powder, 11 weight % linseed oil and 16 weight % saw-dust.

Description: COMPOSITION FOR SIMULATED LEAD STRIPS The present invention relates to a composition for simulated lead strips for leaded windows. Lead strips are used since a long time for mounting of glass in e.g. windows and doors.The pieces of glass may be colourless or be coloured in different shades, for instance in windows of coloured glass in churches.. Leaded windows are estetically attractive,but their common usage is prevented by the high costs of manufac¬ ture,which is due to the extensive manual work and the costs for the lead strips.The object of the invention" is to try to eliminate these drawbacks by providing a composition, which can replace the traditional lead strips, and that is cheaper than those.The composition according to the invention is also intended be be extruded by the aid of simple spray gun tools,in which way the manufacture of leaded windows can be substantially rationalized. The objects of the invention are achieved by a compo¬ sition of the art mentioned above, hich is characterized in that it consists of 50 - 75 weight % binder 5 - 15 - ■■ - pigment 5 _ 20 -"- oil 10 - 30 u.«- filling. It is preferred in the invention, that the composition consists of 60 - 70 weight % binder 5 - 10 -"- pigment 7 _ 15 -ii- oil 10 - 20 - » '- filling. The object of the binder is to bind the components in the composition according to the invention,and further the binder shall possess a good adhesiveness to glass. These properties are possessed by a plurality of polymer as well thermoplastic as - thermosetting polymer binders.Among especially preferred polymer binders may be mentioned a) polyvinylalcohol based adhesives,e.g. those -wherein the polyvinyl alcohol is present in the form of a dispersion (BOSTIK ADHESIVE 750), b) polyurethane- based adhesives (e.g. BOSTIK ADHESIVE 800), and c) synthetic rubber-based adhesives (e.g. BOSTIK 25 SET ADHESIVE). The pigment of the composition may consist of one single pigment, but it is preferably formed by a combina¬ tion of two or more pigments.The main object of the pigment is to give the composition the desired colour and lead or metal brilliance, but the pigment can to some degree act as extender or filling.Among suitable pigment materi¬ als there may be mentioned iron oxide,graphite,metal pigments and bronze powder, like aluminium bronze powder, copper bronze powder and gold bronze powder, which pig¬ ments can be used alone or in combination with each other, as has been mentioned above.According to the invention, it is preferred to use ,especially, iron oxide powder in combination with aluminium bronze powder. The oil of the composition has as an object to act as a lubricant and consistency agent to give the compo¬ sition the desired pastelike consistency in order that the composition may be extruded in a satisfactory way to strip form without flowing after the extrusion. Further the oil acts to impregnate the filling, that is within the composition,and the oil also gives the desired surface finish and brilliance to the extruded stripe and suitably contributes to the hardening of the composition.The properties now mentioned are possessed in an excellent way by vegetabile oils and preferably by drying vegetable oils.One preferred vegetable oil in the invention is linseed oil,raw or boiled. The filling in the composition according to the invention acts to make the composition smooth and to give it the right consistency for extrusion to stripe form.The filling also contributes to giving ready stripe structure and surface texture.Suitable fillings comprise powder materials,like wood-flour,saw-dust,sand,metal powder and the like. One preferred filling in the invention is wood-flour or saw-dust. In order further to illustrate the invention there is given, below,an example of the most preferred embodiment for the moment being. Example A composition was manufactured with the formulation below, by mixing at room temperature, the components in a vessel with mixer. Component Parts by weight Weight % Polyvinyl alcohol based 625 65 adhesive (BOSTIK ADHESIVE 750) Iron oxide powder 25 3 Aluminium bronze powder 50 5 Linseed oil 100 11 Saw-dust 150 16 The composition manufactured was filled in a cartridge of a hand-pistol for extrusion,the nozzle of which had the form of a profile, and gave at extrusion a strip profile,the appearance and properties of which substan¬ tially correspond to those of a lead strip.

Claims: PATENT CLAIMS 1. Composition for simulated lead stripes for leaded windows, characterized in that it consists of 50 - 75 weight % binder 5 - 15 -"- pigment 5 - 20 - • •- oil 10 - 30 -«- filling, the binder being a polymer binder, chosen among polyvinyl alcohol based adhesives, polyurethan 1 based adhesives and synthetic rubber based adhesives. 2. Composition according to claim 1, characterized in that the polymer binder is a polyurethan based ad¬ hesive. 3. Composition according to claim 1 or 2, characterized in that it consists of 60 - 70 weight % binder 5 _ 10 - » - pigment 7 - 5 -"- oil 10 - 20 -"- filling 4. Composition according to any of the preceeding claims, characterized in that the pigment is chosen among at least one of the following: metal pigment, bronze powder, copper bronze powder and gold bronze powder. 5. Composition according to claim 4, characterized in that the bronze powder is chosen among aluminium bronze powder, copper bronze powder and gold bronze powder. 6. Composition according to any of the preceeding claims characterized in that the oil is a vegetable oil. 7. Composition according to claim 6, characterized in that the vegetable oil is a drying oil. 8. Composition according to any of the preceeding claims, characterized in that the fillingis a powder material,chosen among wood- flour,saw-dust and sand. 9.Composition according to any of the preceeding claims, characterized in that it consists of about 65 weight % polyvinyl alcohol based adhesive, about 3 weight % iron oxide powder, about 5 weight aluminium bronze powder, about 11 weight % linseed oil and about 16 weight % saw- dust.

Inventors: BERLY ARTURO, BERLY, ARTURO
Applicants: BERLY ARTURO, BERLY, ARTURO
Application year: 1985
Main classification: B44F1
IPC codes: B44F1, C09K3