B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 35/08 (2006.01) B29C 31/04 (2006.01) B29C 33/06 (2006.01) B29C 37/00 (2006.01) B29C 39/24 (2006.01) B29C 39/36 (2006.01) B29C 39/42 (2006.01) B29D 11/00 (2006.01) C08J 3/24 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01) B29C 33/30 (2006.01)
Patent
CA 2129461
The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is cross-linked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.5 to approximately 80 % of units of formula I Image wherein R is lower alkylene having up to 8 carbon atoms, R1 is hydrogen or lower alkyl and R2 is an olefinically unsaturated, electron-attracting, copolymerisable radical preferably having up to 25 carbon atoms, to crosslinked polymers, either homo- or co- polymers of those novel prepolymers, to processes for the preparation of the novel prepolymers and the homo- and co-polymers obtainable therefrom, to mouldings made from the said homo- or co-polymers, especially contact lenses made from those homo- or co-polymers, and to processes for the manufacture of contact lenses using the said homo- or co- polymers.
Fetherstonhaugh & Co.
Novartis Ag
LandOfFree
Photocrosslinked polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photocrosslinked polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photocrosslinked polymers will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1457414