Sensitizing solution and method of its preparation

Abstract

A sensitizing solution, especially a sensitizing solution for sensitizing surfaces, containing a solution of tin(II) chloride SnCl.sub.2 and distilled water, especially for sensitizing non-conductive surfaces, which further contains glycerine. A method of preparation of the sensitizing solution, especially the method of preparation of the sensitizing solution, according to which the solution of tin(II) chloride SnCl.sub.2 and distilled water is mixed with a reducing agent, which is glycerine.

Claims

1. A sensitizing solution, especially a sensitizing solution for sensitizing surfaces, containing a solution of tin(II) chloride SnCl.sub.2 and distilled water, especially for sensitizing non-conductive surfaces, wherein it further contains glycerine.

2. The sensitizing solution according to claim 1, wherein it contains 0.01 to 1 wt. ‰ of tin(II) chloride SnCl.sub.2, 0.01 to 1 wt. ‰ of glycerine and distilled water.

3. A method of preparation of the sensitizing solution, especially the preparation method of the sensitizing solution according to claim 1, wherein a solution of tin(II) chloride SnCl.sub.2 and distilled water is mixed with a reducing agent, which is glycerine.

4. The method of preparation of the sensitizing solution according to claim 3, wherein firstly glycerine is pre-heated to 35° C., and secondly for 1 litre of the resulting sensitizing solution, 45 to 450 ml of tin(II) chloride SnCl.sub.2 solution with a temperature of 20° C. and a concentration of 1,145 g of tin(II) chloride dihydrate per 1 litre is slowly added under constant stirring to 50 to 500 g of glycerine, and finally, distilled water is added and all components are stirred again, forming concentrated sensitizing solution.

5. The method of preparation of the sensitizing solution according to claim 4, wherein the sensitizing solution concentrate is diluted with distilled water in a ratio of 1:500 to 1:5,000 before applying onto a surface to be sensitized.

Description

DESCRIPTION OF THE PREFERRED EMBODIMENTS

EXAMPLE 1

[0017] A sensitizing solution for sensitizing glass panel surface, prior to applying a silvering solution, contains 1 wt. ‰ of tin(II) chloride SnCl.sub.2, 1 wt. ‰ of glycerine, and the rest consists of distilled water.

[0018] According to the preparation method of the above-mentioned sensitizing solution containing a reducing agent, which is glycerine, the first step was to pre-heat glycerine to 35° C. Subsequently for 1 litre of the resulting sensitizing solution, to 500 g of glycerine under constant stirring was slowly added 450 ml of acidic solution of tin(II) chloride with a temperature of 20° C. and a concentration of 1,145 g of tin(II) chloride dihydrate per 1 litre. Furthermore, distilled water was added and all components were stirred again, forming 1 litre of concentrated sensitizing agent, which prior to application onto the surface to be sensitized, was diluted with distilled water in a ratio of 1:500.

[0019] The sensitizing solution thus prepared is then applied onto the glass panel surface; after a while, the remaining solution has to be thoroughly rinsed by distilled water, so the treated surface is ready for applying the silvering solution.

EXAMPLE 2

[0020] A sensitizing solution for sensitizing silvered glass panel surface, prior to applying a silane solution, contains 0.01 wt. ‰ of tin(II) chloride SnCl.sub.2, 0.01 wt. ‰ of glycerine, and the rest consists of distilled water.

[0021] According to the preparation method of the above-mentioned sensitizing solution, containing a reducing agent, which is glycerine, the first step was to pre-heat glycerine to 35° C. Subsequently for 1 litre of the resulting sensitizing solution, 50 g of glycerine under constant stirring was slowly added 45 ml of acidic solution of tin(II) chloride with a temperature of 20° C. and a concentration of 1,145 g of tin(II) chloride dihydrate per 1 litre. Furthermore, distilled water was added and all components were stirred again, forming 1 litre of concentrated sensitizing agent, which prior to application onto the surface to be sensitized, was diluted with distilled water in a ratio of 1:5,000.

[0022] The sensitizing solution thus prepared is applied onto the silvered glass panel surface, previously rinsed with distilled water. Next the surface is rinsed with distilled water again and the silane solution is applied.

EXAMPLE 3

[0023] A sensitizing solution for sensitizing plastics, prior to applying a silver coating, contains 0.02 wt. ‰ of tin(II) chloride SnCl.sub.2, 0.02 wt. ‰ of glycerine, and the rest consists of distilled water.

[0024] According to the preparation method of the above-mentioned sensitizing solution, containing a reducing agent, which is glycerine, the first step was to pre-heat glycerine to 35° C. Subsequently for 1 litre of the resulting sensitizing solution, 100 g of glycerine under constant stirring was slowly added 90 ml of acidic solution of tin(II) chloride with a temperature of 20° C. and a concentration of 1,145 g of tin(II) chloride dihydrate per 1 litre. Furthermore, distilled water was added and all components were stirred again, forming 1 litre of concentrated sensitizing agent, which prior to application onto the surface to be sensitized, was diluted with distilled water in a ratio of 1:5,000.

[0025] The sensitizing solution thus prepared is applied onto the plastic surface prior to rinsing by distilled water and applying the silvering solution.

INDUSTRIAL APPLICABILITY

[0026] The sensitizing solution according to the present invention can be used for sensitizing various types of surfaces, especially glass panels in mirror production, to sensitize silver coating before applying silane, and for treating plastics prior to silvering their surfaces.