Hydrophilic contact lenses and lens polymer

Details Hydrophilic contact lenses and lens polymer Hydrophilic contact lenses and lens polymer

1977-06-09

1978-09-12

Lilling, Herbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

264 1, 5262323, 526317, C08F 436, C08F12006, C08F 2006, C08L 3302

Patent

active

041136861

ABSTRACT:
A superior hydrophilic gel polymer and contact lenses therefrom are formed by bulk polymerization of about 100 parts by volume of hydroxyethyl methacrylate, 10 parts by volume of isobutyl methacrylate, 0.136 parts by volume of trimethylolpropane trimethacrylate, 1.35 parts by volume of methacrylic acid in the presence of 0.25 parts by volume of 2,5 dimethyl 2,5 bis (2-ethyl hexoyl peroxy) hexane at a temperature of about 65.degree. C to produce a material which, when hydrated, exhibits a water content of about 43% and a linear expansion of about 22%.

REFERENCES:
patent: 3850892 (1974-11-01), Shen et al.
patent: 3926892 (1975-12-01), Holcombe
patent: 3937680 (1976-02-01), Carle
patent: 3944637 (1976-03-01), Bond et al.
patent: 3948841 (1976-04-01), Dusek
patent: 3965063 (1976-06-01), Holcombe
patent: 3983083 (1976-09-01), Kaetsu et al.
patent: 3985697 (1976-10-01), Urbach
patent: 3988274 (1976-10-01), Masuhara et al.

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