Production process of lenses made of polymerizable...

Details Production process of lenses made of polymerizable... Production process of lenses made of polymerizable...

B - Operations, Transporting

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D

18/104

B29D 11/00 (2006.01) B29C 33/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1135913

ABSTRACT OF THE DISCLOSURE: Production process of lenses made of polymerizable synthetic resins. According to the production process lenses made of synthetic resins may be obtained through casting of a catalized monomer which is polymerized up to the hardening point by warming it within a mold formed from two or more glass lenses, assembled together by means of a perimetrical gasket and a spring. In the process the shrinkage of the polymer being formed is compensated through catalized monomer kept in presence of air outside of the mold, from where it may flow into the interior of the mold where is no air. According to the process it is possible to obtain transparent and practically colourless lenses made from polymer, showing outstanding physico-chemical characteristics and possessing a diameter almost equal to that of the glass lenses forming the mold.

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