Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1986-06-27
1988-05-24
Lilling, Herbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 14, 524312, 524313, 524431, 524434, 524440, 524441, 524496, 524503, 524589, 524919, 428 38, C08K 310, B44F 106
Patent
active
047466952
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a composition for simulated lead strips for leaded windows.
Lead strips has been used for 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 manufacture, 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 to be extruded with 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 composition of the art which is characterized in that it consists of
______________________________________ 50-75 weight % binder,
at least one
5-15 weight % pigment,
5-20 weight % oil, and
10-30 weight % filling.
______________________________________
It is preferred in the invention that the composition consists of
______________________________________ 60-70 weight % binder
5-10 weight % pigment
7-15 weight % oil
10-20 weight % 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 such as thermoplastic and 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 combination 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 materials there may be mentioned iron oxide, graphite, metal pigments and bronze powder, like aluminium bronze powder, copper bronze powder and gold bronze powder, which pigments 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 composition 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 vegetable 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
REFERENCES:
patent: 1057325 (1913-03-01), Brown et al.
patent: 1381738 (1921-06-01), Priest
patent: 1954835 (1934-04-01), Stauffer
patent: 2046793 (1936-07-01), Schroeder
patent: 2338252 (1944-01-01), Marberg et al.
patent: 3427176 (1969-02-01), Moriya
patent: 3875091 (1975-04-01), Tsugukuni et al.
patent: 4127689 (1978-11-01), Holt
patent: 4536424 (1985-08-01), Laurent
Derwent Abs. 82066/D45, Fr2479247, 10-81, Bois.
Derwent Abs. 85-210398/35, DD221749, ChemWerk, 5-85.
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