Transparent plastic optical components and abrasion resistant polymer substrates and methods for making the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 28, 2006
Grant Date -
Feb 12, 2004
app pub date -
Aug 4, 2003
filing date -
Aug 23, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polymer-based component formed from a synthetic thermoplastic or thermoset resin substrate, such as polymethyl methacrylate, which is resistant to warping and distortion from moisture. A composite multi-layer surface-hardening coating is formed on at least the anterior surface of the resin substrate. The component can include a composite multi-layer reflective coating to form a mirror. A protective back-coat layer is deposited on a posterior surface of the mirror. A multi-layer weather-resistant coating may optionally be applied to the anterior surface of the polymer-based mirror in order to increase the weatherability and durability of the mirror. The various layers coating the synthetic resin substrate have their moisture permeabilities selected so that substantially equal amounts of moisture permeate through to both the anterior and posterior side of the synthetic resin substrate. A sol-gel coating can be used to deposit the multi-layers in a single step by providing gradient zones of zirconia/silica while enabling a hydrophobic or a hydrophilic exterior surface.
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