Mold material made with additives

Details Mold material made with additives Mold material made with additives

B - Operations, Transporting

29

C

B29C 33/40 (2006.01) B29C 33/64 (2006.01) B29D 11/00 (2006.01) C08L 23/12 (2006.01) C08L 25/06 (2006.01) B29C 39/00 (2006.01)

Patent

CA 2186564

The present invention is directed to a composition comprising polystyrene or polypropylene with at least 0.05% (w/w) of an additive or wetting agent, the article of manufacture comprised thereof, such as a mold for making contact lenses and the mold assembly containing said mold, and the use of such mold so to minimize defects, such as holes, puddles, chips and tears in the lens.

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