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US 2003/0125409 A1Published application
Method for polymerizing lenses
AssigneeBausch & Lomb Incorporated
InventorYu-Chin Lai
Life of this patent
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Abstract
A method for photopolymerizing a monomer mixture to form a lens involves photopolymerizing a mixture of lens-forming monomers that includes an initiator of the formula: 1 wherein: Ar represents an aromatic radical; Ra represents a secondary amino radical; Rb represents an ethylenically unsaturated radical or an aromatic radical; and Rc represents a secondary amino radical.
Claims18
A method comprising:
- providing a monomer mixture comprising a lens-forming monomer and an initiator of the formula:
- 13
- wherein:
- Ar represents an aromatic radical;
- Ra represents a secondary amino radical;
- Rb represents an ethylenically unsaturated radical or an aromatic radical;
- and
- Rc represents a secondary amino radical;
- and
- photopolymerizing said monomer mixture.
7 more elements
A method for polymerizing a monomer mixture to form a lens comprising:
- charging to a mold a monomer mixture including lens-forming monomers, a UV-absorbing compound and a polymerization initiator of the formula:
- 14
- wherein:
- Ar represents an aromatic radical;
- Ra represents a secondary amino radical;
- Rb represents an ethylenically unsaturated radical or an aromatic radical;
- and
- Rc represents a secondary amino radical;
- and
- exposing the monomer mixture in the mold to a light source to cure the monomer mixture in the mold.
7 more elements
Dependencies are inferred from the claim text.