| 摘要 |
A deformable-elastic lens body (10) is made of crosslinked acrylic material formed of copolymers of methacrylate and acrylate esters. These are relatively hard and relatively soft at body temperature and are crosslinked with a diacrylate ester to produce an acrylic copolymer having, ideally, a substantially tack-free surface, a crosslink density of between 0.5 x 10<-><2> and 1.5 x 10<-><2> moles per litre, a glass transition temperature in the range of -30 DEG C to 25 DEG C, a tensile modulus between 1000 and 3000 psi and an elongation at break of 100% or greater. |
