Protective coating of plastic substrates via plasma-polymerizati

Details Protective coating of plastic substrates via plasma-polymerizati Protective coating of plastic substrates via plasma-polymerizati

1994-10-31

1996-10-29

Pianalto, Bernard

Coating processes

Direct application of electrical, magnetic, wave, or...

Polymerization of coating utilizing direct application of...

4272553, 4272556, 427296, 427322, 427491, 427492, 427495, 427536, 427539, 427574, 427578, 427585, C08J 718

Patent

active

055694977

ABSTRACT:
A protective layer or film is deposited onto a face surface of a plastic substrate, e.g., a PMMA shaped article, by (a) placing such plastic substrate on a weakly or unpolarized electrode comprising a plasma-generating circuit, (b) plasma-pretreating the plastic substrate in an oxygen plasma, under primary vacuum, by a pulse of electrical power density of such minimum magnitude as to oxygen-activate a face surface thereof, and (c) plasma-polymerizing at least one organosilicon monomer onto the face surface of said plastic substrate, also under vacuum and from an oxygen/organosilicon monomer plasma, whereby depositing a thin protective layer or film thereon.

REFERENCES:
patent: 4762730 (1988-08-01), Enke et al.
patent: 4830873 (1989-05-01), Benz et al.
patent: 5294464 (1994-03-01), Geisler et al.

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