Gas permeable contact lens and method and materials for its manu

Details Gas permeable contact lens and method and materials for its manu Gas permeable contact lens and method and materials for its manu

1988-09-07

1989-04-11

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

351160R, 525100, 526279, 528 32, C08F 3008

Patent

active

048207470

ABSTRACT:
A polymer is prepared by forming a mixture of 3-methacryloxypropytris(trimethylsiloxy) silane, methacrylic acid, cyclohexylmethacrylate, 2-hydroxypropylmethacrylate, m,p-styrylethyltrimethoxysilane, methyl methacrylate and a cross linker. A polymerization initiator is added to the mixture, and UV or thermal energy is supplied so that the mixture polymerizes to form a polymer that is transparent, hard, machinable and oxygen permeable. The polymer is cut into lenses, and the lenses are treated with acetyl chloride or another suitable chemical so that their surfaces become hydrophilic. The result is oxygen-permeable, hydrophilic, daily and extended-wear, hard contact lenses.

REFERENCES:
patent: 3745042 (1973-07-01), Lim et al.
patent: 3808178 (1974-04-01), Gaylord
patent: 4120570 (1978-10-01), Gaylord
patent: 4139692 (1979-02-01), Tanaka
patent: 4152508 (1979-05-01), Ellis et al.
Journal of Colloid and Interface Science, vol. 94, No. 2, Aug. 1983, pp. 589-592.

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