Photo-hardened liquid silicon rubber compounds for the production of a master form

摘要

A photo-curable liquid silicone rubber composition is curable upon exposure to light into a cured product having a Shore A hardness of 20 to 60 and a light transmittance of at least 10% at a wall gage of 10 mm. The composition is suitable for forming a transparent templating mother mold which allows a photo-curable liquid resin cast therein to be cured with light transmitted by the mold wall.