Plastic articles having multi-layer antireflection coatings, and

Details Plastic articles having multi-layer antireflection coatings, and Plastic articles having multi-layer antireflection coatings, and

1996-06-17

1999-01-05

Pezzuto, Helen L.

Stock material or miscellaneous articles

Composite

Of silicon containing

428412, 428446, 428480, 428500, 427162, 4273722, 427380, B32B 904

Patent

active

058560181

ABSTRACT:
A sol-gel process is disclosed for depositing multi-layer antireflection coatings on plastic substrates. One or more polymerized, titanium-containing solutions are provided by mixing a titanium alkoxide, an alcohol, and water, and one or more polymerized, silicon-containing solutions are provided by mixing a silicon alkoxide, an alcohol, and water. These solutions are applied to the plastic substrate in an alternating fashion, to produce a succession of uniform layers of polymerized titanium dioxide and polymerized silicon dioxide. Each layer is individually cured before the next layer is applied. The resulting coating of multiple polymerized layers provides very low reflectance over the entire visible wavelength range, yet with excellent mechanical strength and durability.

REFERENCES:
patent: 4725109 (1988-02-01), Wank et al.

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