Societe Nationale Elf Aquitaine

Elf Atochem North America, Inc.

Atohaas C.v.

Didier Ferry

Daniel Muller

Ryan R Dirkx

Maurice Bourrel

Guy Campet

Claude Delmas

Jean M Chabagno

Regine Garie

Francis Verzaro

Jean Salardenne

Josik Portier

Jean Paul Couput

Bertrand Morel

Catherine Geoffroy

Jean-Paul Couput

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.

Protective coating of plastic substrates via plasma-polymerization

An electrochromic element useful in an electrochromic glass or mirror device and a process for making such element. The element is a five-layered structure including an electrolyte ion conducting layer interposed between first and second inorganic electrochromic layers which are interposed between a pair of conductive electrodes. The first and second inorganic electrochromic layers are different and are capable of exhibiting color-forming properties complementary to one another upon the incorporation of an alkali metal or Ag ion, a mixture of alkali metal or Ag ions or a mixture of alkali metal or Ag and hydrogen ions. The electrolyte ion conducting layer may be a copolymer of ethylene oxide, butylene oxide or methyl glycidyl ether, and optionally a small amount of allyl glycidyl ether, along with an ionizable salt, or may be a polyurethane gel formed by reacting the copolymer with triisocyanate, along with an ionizable salt. The second inorganic electrochromic layer comprises a transition metal oxide which exhibits a color change when shifting between the +2 and +3 valence states. The second inorganic electrochromic layer may be produced by an electrochemical process, a chemical process, or by a physical process. The electrochromic element may also comprise a plurality of five-layer structures in tandem, each pair separated by a substrate.

Electrochromic element, materials for use in such element, processes for

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Artix, France

Didier Ferry