Fully-hydrolized ketimine silane/epoxide silane copolymer liquid

Details Fully-hydrolized ketimine silane/epoxide silane copolymer liquid Fully-hydrolized ketimine silane/epoxide silane copolymer liquid

1997-04-07

1999-02-02

Glass, Margaret

Stock material or miscellaneous articles

Composite

Of silicon containing

10628711, 10628712, 427387, 524868, 524869, B32B 904

Patent

active

058662626

ABSTRACT:
Dipcoated Rx spectacle lenses require coating scratch resistance, tinting and/or AR coating processes. Chemically, fully-hydrolized copolymers of amino silane and epoxide silane form the chemical backbone of these heat-curing hardcoats, although polyfunctional organic resin modifiers may also "co-cure" into the backbone. The liquid coating copolymer is made in three chemical reactions: (1) fully hydrolizing the two silane Components A&B separately, with a stoichemetric excess of water; (2) ketimine formation, to latently cap the amine functionality; (3) "bodying" the liquid hardcoating to a desired degree of copolymerization, by reacting together the fully hydrolized ketimine silane Component B with the fully hydrolized epoxide-functional silane Component A. Dilution is with the selected resin modifier(s) ketone and alcohol solvent. The resin modifier has at least two organo-functional reactive groups per molecule, of epoxide or melamine or hydroxyl or urea families.

REFERENCES:
patent: 3961977 (1976-06-01), Koda
patent: 4167537 (1979-09-01), Taniyama
patent: 4196014 (1980-04-01), Taniyama
patent: 4241116 (1980-12-01), Taniyama
patent: 4378250 (1983-03-01), Treadway
patent: 4800122 (1989-01-01), Sallavanti

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