RU1825821C - Method of preparation of polymeric material surface before chemical metallization - Google Patents

Abstract

In the method, degreasing and etching are carried out simultaneously in a solution containing, g / l: trisodium phosphate 20-30, sodium carbonate 40-50; sodium hydroxide 200-250; Surfactant (OS-20) 5-7, at 50-60 ° C for 10-15 minutes, and then after washing it is etched in an emulsion containing, g / l: turpentine 20-40; monoethanol-min 20-30; Surfactant (OS-20) 10-15, at room temperature for 5-7 minutes and after washing in a solution containing, g / l: oxalic acid 50-80; hydrochloric acid 150-200, at room temperature for 1-2 minutes.

Description

The invention relates to electrochemical production, in particular, to preparing the surface of polymeric materials before chemical nickel plating, and can be used to process fine-fiber bulk porous polymeric materials - polypropylene and polyamide, lavsan, used as a substrate for battery electrodes.

The purpose of the invention is to provide a high-quality coating while maintaining the integrity of the fine-fiber bulk material.

Surface preparation in three stages in the indicated sequence at a low temperature and a maximum processing time of 67 min ensures the integrity of the thin-fiber bulk material and high quality processing. It has been found that with this preparation method, micro-depressions are formed on the surface of the fibers, into which, upon subsequent activation, palladium is deposited, the nickel coating is well adhered to the substrate. The method is universal, suitable for processing both polypropylene and polyamide.

The method is carried out as follows.

Thin-fiber bulk material with a thickness of 0.2-10 mm (polyamide and polypropylene) is subjected to joint degreasing and prevention in a bath with a solution of the composition

No. ЗР04 -12Н2020-30

No. 2COz40-50

NaOH200-250

Surfactant (OS-20) 5-7

at 50-60 ° C for 10-15 minutes After two-stage washing in hot (50-60 ° С) and cold water,

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y eat

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etching in an organic emulsion composition:

Turpentine 20-40

Monoethanolamine 20-30

Surfactant (OS-20) 10-15

at room temperature for 5-7. Then the material is washed again in hot and cold water and sent for etching in a solution of the composition, g / l: 4 Oxalic acid 50-80

Salt for acid 150-200

at room temperature for 1-2 minutes

The test results are shown in the table,

As can be seen from the table, the processing of fine-fiber bulk material (polyamide and polypropylene) in solutions according to the prototype leads to the destruction of the material. Going beyond the scope of the claimed solutions (Examples 1,5 and 6) ensures the integrity of the material, but the adhesion quality of the coating to the substrate is not satisfactory.

Processing the material in solutions corresponding to the compositions of the inventive ones (Examples 2-4) does not destroy the material and ensures good adhesion.

Thus, the use of the proposed method allows you to prepare the surface of fine-fiber bulk materials - polypropylene and polyamide

for applying a uniform, uniform nickel coating that adheres well to the substrate.

Claims (1)

SUMMARY OF THE INVENTION A method for preparing the surface of polymeric materials before chemical metallization, including degreasing, washing, etching, characterized in that, in order to obtain a high-quality coating while maintaining the integrity of the fine-fiber bulk material, degreasing and etching are carried out simultaneously in a solution containing g / L: Trisodium phosphate 20-30 Sodium carbonate 40-50 Sodium hydroxide 200-250 Surfactant (OS-20) 5-7 at a temperature of 50-60 ° C for 10-15 minutes, and then after washing the material is subjected to etching in an emulsion containing, g / l: Turpentine, 20-40 Monoethanolamine 20-30 Surfactant (OS-20) 10-15 at room temperature for 5-7 minutes and after washing the herbs are etched in a solution containing, g / l: Oxalic acid 50-80 Salt per acid 150-200, at room temperature for 1-2 minutes