FORMAD ARTIKEL AV POLYPARAFFINSILOXAN FOR BIOMEDICINSK ANVENDNING

摘要

Contact lenses and other biomedical shaped articles with advantageous properties are made from polymers and copolymers of monomeric polyparaffinsiloxanes end-capped with activated unsaturated groups. The poly(organoparaffinsiloxane) polymers and copolymers are obtained by polymerising monomers represented by the following formula: wherein A is an activated unsaturated group; R is a divalent hydrocarbon radical having from 1 to about 22 carbon atoms; R1, R2, R3 and R4 can be the same or different and are selected from a monovalent hydrocarbon radical having from 1 to about 12 carbon atoms and a halogen substituted monovalent hydrocarbon radical having from 1 to about 12 carbon atoms; R5 and R6 can be the same or different and are selected from hydrogen, a hydrocarbon radical containing from 1 to about 12 carbon atoms, a carboxylic acid group, a carboxylic acid ester group represented by the formula wherein R7 is selected from a hydrocarbon group containing from 1 to about 12 carbon atoms and a carboxylic acid amide represented by the formula wherein R8 and R9 can be the same or different and each is selected from hydrogen and a hydrocarbon group containing from 1 to about 12 carbon atoms; x is 2 or greater and m is 1 or greater.