Method of forming shaped hydrogel articles including contact...

Details Method of forming shaped hydrogel articles including contact... Method of forming shaped hydrogel articles including contact...

B - Operations, Transporting

29

D

18/106

B29D 11/00 (2006.01) C07C 57/04 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2032200

Shaped hydrogel articles such as soft contact lenses are prepared by (1) molding or casting a polymerization mixture comprising: (a) a monomer mixture comprising a major proportion of a hydrophilic (meth)acrylate ester such as 2-hydroxyethyl methacrylate, an alkyl (meth)acrylate wherein the alkyl group contains at least four carbon atoms, and a cross-linking monomer; and (b) a water-displaceable diluent, wherein said diluent has a viscosity of at least 100 MPa Sec at 30°C, and wherein said diluent consists essentially of a boric acid ester of certain dihydric alcohols, said dihydric alcohols having Hansen polar (w p) and Hansen hydrogen bonding (w h) cohesion parameters falling within the area of a circle defined as having a center at w h = 20.5, w p = 13, and a radius of 8.5, to produce a shaped gel of a copolymer of said monomers and said diluent, and (2) thereafter replacing said diluent with water.

Affiliated with

Also associated with

Rating

Method of forming shaped hydrogel articles including contact... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of forming shaped hydrogel articles including contact..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming shaped hydrogel articles including contact... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2089421