Method of forming shaped hydrogel articles
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United States of America Patent
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Jul 14, 1987
Issued Date -
N/A
app pub date -
Feb 19, 1985
filing date -
Nov 21, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for forming shaped hydrogel articles such as soft contact lenses wherein hydrophilic monomers are mixed with an inert diluent prior to polymerization, and the diluent is replaced with water following the polymerization. Diluents yielding optically clear hydrogels with good mechanical properties are selected on the basis of their viscosity and their Hanson cohesion parameters relative to the cohesion parameters of the polymeric component of the hydrogel.
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