Process of making optical blanks

Details Process of making optical blanks Process of making optical blanks

1985-11-08

1987-12-29

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

26433111, 26433121, 523107, 526279, 528 14, 528 17, 528 26, 528 42, 528 43, B29D 1100

Patent

active

047159995

ABSTRACT:
Optical blanks, for example spectacle lenses, are produced by hot-blank pressing or injection molding of polyorganoheterosiloxanes which are obtainable by hydrolytic polycondensation of at least one titanium-, zirconium-or tin-compound, at least one organofunctional silane and, where applicable, at least one inorganic oxide component. For control of the optical characteristics and working properties, polyorganoheterosiloxanes which have a polymerizable organic radical may be modified by additional polymerization with other copolymerizable condensates or monomers.

REFERENCES:
patent: Re31406 (1983-11-01), Gaylord et al.
patent: 4152508 (1979-05-01), Ellis et al.
patent: 4153641 (1979-05-01), Deichart et al.
patent: 4182822 (1980-01-01), Chang
patent: 4259467 (1981-03-01), Keogh et al.
patent: 4343927 (1982-08-01), Chang
patent: 4419505 (1983-12-01), Ratkowski et al.
patent: 4424328 (1984-01-01), Ellis
patent: 4463149 (1984-07-01), Ellis

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