Abstract: The invention relates to a stabilizer system, in particular for thiol-ene and/or thiol-yne compositions, comprising: at least one free radical scavenger component, at least one acidic component, wherein the acidic component comprises one or more organic acids, and at least one sulfidic component selected from the group of organic sulfides. The stabilizer system according to the invention inhibits undesirable reactions in the thiol-ene composition or thiol-yne composition according to the invention during storage, so that longer storage is possible without influencing the quality. The stabilizer system according to the invention, however, does not mean that an intended reaction of the thiol with alkenes or alkynes in the respective thiol-ene and thiol-yne composition is no longer possible or is no longer possible at a sufficient speed.

Abstract: The invention has as subject matter a method for producing a polyurethane cast resin, wherein the production comprises the steps of mixing at least one thiol component with at least one isocyanate component, degassing of the mixture and hardening of the polyurethane polymer in a one-stage process. Cast resins for electronic or optoelectronic components of for the production of optical lenses are obtained by the method of the invention that have good mechanical properties and very good optical properties at the same time by a suitable combination of polythiols as hardening component with commercially available isocyanates. The addition of special isocyanates is also not very necessary, as is the case for carrying out the method in several stages. The method in accordance with the invention results in an economical, one-stage process in the properties of the cast resin that are necessary for the application range.

Abstract: The invention has as subject matter a method for producing a polyurethane cast resin, wherein the production comprises the steps of mixing at least one thiol component with at least one isocyanate component, degassing of the mixture and hardening of the polyurethane polymer in a one-stage process. Cast resins for electronic or optoelectronic components of for the production of optical lenses are obtained by the method of the invention that have good mechanical properties and very good optical properties at the same time by a suitable combination of polythiols as hardening component with commercially available isocyanates. The addition of special isocyanates is also not very necessary, as is the case for carrying out the method in several stages. The method in accordance with the invention results in an economical, one-stage process in the properties of the cast resin that are necessary for the application range.