Ophthalmic lenses

Details Ophthalmic lenses Ophthalmic lenses

B - Operations, Transporting

29

C

B29C 33/60 (2006.01) B29D 11/00 (2006.01)

Patent

CA 2331749

The present invention relates to the use of metal organic compounds in a process for providing a moulded plastic article comprising the step of polymerization casting of a curable composition comprising one or more polymerizable molecules or compounds or compositions in the presence of a mould release agent, which in turn comprises a metal organic compound, complexes and/or salts thereof. Such use leads to less surface defects of the moulded article and lower mould damage.

L'invention concerne l'utilisation de composés organiques de métaux dans un procédé de production d'un article en plastique moulé. Ledit procédé consiste à couler par polymérisation une composition durcissable comprenant une ou plusieurs molécules ou composés polymérisables, en présence d'un agent de démoulage, lequel à son tour contient un composé organique de métal, des complexes et/ou des sels de celui-ci. Ainsi, les défauts de surface de l'article moulé sont moins nombreux et les dommages au moule sont réduits.

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