Process for the preparation of organical optical parts and its application to the manufacture of preproducts for polymeric optical fibres.

摘要

In the prepn. of the first layer of organic optics, under pressure and inert atmos., from (meth) acrylic monomers, a mixt. comprising at least a prepolymer of these monomers, having a conversion degree of at least 30%, a polymsn. initiator and a chain transfer agent, is placed in a reactor and polymerised under inert atoms. and pressure of at least 5 bars, pref. at least 15 bars. Also claimed are preocesses (see below) for depositing a new layer on the above layer. The mixt. to be polymerised is pref. kept under inert atomos. pressure of at least 15 bars while simultaneously:- keeping the temp. at 30-100 deg.C until conversion rate reaches 95-+/-2%, raising the temp. to 120-160deg.C until conversion rate reaches 97-99% and continuing to raise the temp. to 160-180deg.C for at least 2 hrs. and cooling to form a solid organic optics.