METHOD FOR DEPOSITING A TRANSPARENT ANTISTATIC THIN FILM ON THE SURFACE OF A SHAPED OBJECT OF WHICH AT LEAST THE SURFACE PORTION IS MADE OF A STYRENE POLYMER OR COPOLYMER, TO PROVIDE SAID OBJECT WITH LASTING ANTISTATIC PROPERTIES WITHOUT ALTERING ITS APPEARANCE

摘要

A cold plasma type reactive gas stream is produced by means of a continuous, alternating or pulsed electric field having a frequency of 0 Hz-1000 kHz and acting on a gaseous atmosphere pressurized at 5 - 100 Pa and consisting of vapours of one or more organotin compounds such as tetramethyl tin, and by keeping the shaped object below its softening point and in contact with the reactive gas stream for a period long enough to deposit, on the surface of said object, a film which is derived from said organotin compound and has a thickness of 10 - 1500 nm. The resulting coated object has lasting antistatic properties although its surface appearance is unaltered.