Optical lenses prepared from crosslinkable acrylic compositions
OwnerChen-i Lu, Edward D. Morrisoninventors
Life of this patent
Estimating the term…
Abstract
An optical lens having an absorbance of less than about 0.1 for visible radiation of a wavelength in the range of from about 400 to about 600 nanometers is prepared from a crosslinkable acrylic composition. The composition consists essentially of an acrylic monomer and an acrylated urethane oligomer and exhibits a shrinkage upon curing of less than about 0.4%. The lens is prepared by introducing the crosslinkable composition into a lens-forming means and curing it until it is substantially crosslinked.
Claims9
An optical lens having an absorbance of less than about 0.1 for visible radiation of a wavelength in the range of from about 400 to about 600 nanometers, said lens having been prepared by
- introducing into a lens-forming means a crosslinkable composition consisting essentially of:
- (1) an acrylic monomer having the formula ##STR7## wherein n is 1 to 3;
- each of R.sup.5 and R.sup.6 is hydrogen, methyl or halo;
- R.sup.7 is a polyvalent aliphatic, alicyclic or aromatic group, and R.sup.8 is hydrogen or ##STR8## and (2) an acrylated urethane oligomer having the formula ##STR9##
- wherein each of R and R.sup.1 is hydrogen, methyl or halo;
- each of R.sup.2 and R.sup.3 is alkylene, cycloalkylene or arylene;
- and R.sup.4 is a divalent aliphatic, alicyclic or aromatic radical, said composition exhibiting a shrinkage upon curing of less than about 0.4%, and
- curing said composition in said lens-forming means until it is substantially crosslinked.
Dependencies are inferred from the claim text.