Pre-treatment of plastic materials

Details Pre-treatment of plastic materials Pre-treatment of plastic materials

2007-10-02

2007-10-02

Hassanzadeh, Parviz (Department: 1763)

Etching a substrate: processes

Nongaseous phase etching of substrate

Reexamination Certificate

active

10473053

ABSTRACT:
The invention concerns a method for chemical attack of the surface of a plastic material with a solution based on sulphuric acid and chromic anhydride, characterised in that (i) the sulphuric acid concentration ranges between 500 and 760 g/l and (ii) the chromic anhydride concentration ranges between 30 and 200 g/l and (iii) the resulting acidity is at least equal to 13 and at most equal to 16.

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