IT1048412B - Unsatd heterocyclic copolymers - form hydrogels suitable for contact lens
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Unsatd heterocyclic copolymers - form hydrogels suitable for contact lens
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Publication number
IT1048412B
IT1048412BIT6932373AIT6932373AIT1048412BIT 1048412 BIT1048412 BIT 1048412BIT 6932373 AIT6932373 AIT 6932373AIT 6932373 AIT6932373 AIT 6932373AIT 1048412 BIT1048412 BIT 1048412B
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Application filed by Union Optics CorpfiledCriticalUnion Optics Corp
Priority to IT6932373ApriorityCriticalpatent/IT1048412B/en
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Publication of IT1048412BpublicationCriticalpatent/IT1048412B/en
Water-insol. but water-swellable copolymer of 40-75%, pref. 50-65% (I) heterocyclic polymerisable N-vinyl cpd. contg. carbonyl function adjacent to N and selected from N-vinyl lactams, N-vinyl imidazolidone, N-vinyl succinimide, N-vnyl diglycolylimide N-vinyl glutarimide, N-vinyl-3-morpholinone, N-vinyl-5-Me-3-morpholinone and mixts. thereof, and 25-60%, pref. 35-50 wt.% (II) glycidyl ester selected from glycidyl methacrylate, glycidyl acrylate and glycidyl crotonate and mixts. thereof. A shape-retaining hydrogel consisting of above copolymer and 10-90%, pref. 30-70% wt. water is also claimed. This hydrogel can be made in the shape of a contact lens and has excellent phys. and optical properties.
IT6932373A1973-08-011973-08-01Unsatd heterocyclic copolymers - form hydrogels suitable for contact lens
IT1048412B
(en)