| 摘要 |
<p>The invention concerns NCO-terminated vinyl telomers which are particularly suitable for use as surface-modifying agents and as coating materials, but also in the production of polymerizable compounds or block copolymers which react to give polymers which can be used to manufacture moulded articles, in particular contact lenses. The NCO-terminated vinyl telomers proposed are compounds of formula (I) O=C=N-PI*-(-A-)-p-Ra in which PI* is a bivalent photoinitiator group; A is a bivalent substituted 1,2-ethylene group derived from a copolymerizable vinyl monomer by replacing the vinyl double bond by a simple bond, each of the Ra groups, independently of each other, is a monovalent group suitable for use as chair terminator in a polymerization reaction; and p is a whole number from 3 to 500. The vinyl telomers carrying the NCO groups are of use in the production of macromers as well as block, comb, star and graft copolymers, preferably for the manufacture of contact lenses. These telomers are also of use in coating various types of surface, in particular the surfaces of contact lenses.</p> |
