Articles having thin, continuous, impervious coatings

Coated objects of art articles such as vases, jewelry, glass items, and timepieces having a first layer of a substituted silicon compound containing an ethylenically unsaturated group bonded to the silicon of the silicon compound by a carbon to silicon bond and at least one hydrolyzable group attached directly to the silicon of the silicon compound, and a second outer layer comprising a substituted and/or unsubstituted poly(p-xylylene) polymer, said coated articles being characterized as possessing a protective coating as to render said articles more resistant to attack from physical, chemical, or biological damage and provide said particles with increased useful lifetime properties.

A coated metal article such as a logic circuit, electrical component, electric motor, condenser plate, and light bulb metallic part having a first layer of a substituted silicon compound containing an ethylenically unsaturated group bonded to the silicon of the silicon compound by a carbon to silicon bond and at least one hydrolyzable group attached directly to the silicon of the silicon compound and a second outer layer comprising a substituted and/or unsubstituted poly(p-xylylene) polymer, said coated metal article being characterized as possessing a protective outer coating as to render said article more resistant to attack from physical, chemical, or biological damage and provide said article with increased useful lifetime properties.

A coated metallic marine article which is subject to exposure to water and corrosive conditions such as a fishing hook, fishing lure, marine fitting, marine hardware, and water pollution control device having a first layer of a substituted silicon compound containing an ethylenically unsaturated group bonded to the silicon of the silicon compound by a carbon to silicon bond and at least one hydrolyzable group attached directly to the silicon of the silicon compound, and a second outer layer comprising a substituted and/or unsubstituted poly(p-xylylene) polymer, said coated marine article being characterized as possessing a protective outer coating as to render said article more resistant to attack from physical, chemical, or biological damage and provide said article with increased useful lifetime properties.