Diepisulfide based prepolymers and their use in the optical field
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsAref Ben Ahmed Jallouli, Joey Oliveros Obordo, Yassin Yusef Turshani
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Abstract
A process for making a stabilized, liquid, diepisulfide based prepolymer having a viscosity at 25 C. ranging from 20 to 330000 centipoises which comprises polymerizing at room temperature a monomer composition comprising at least one diepisulfide monomer in the presence of at least one anionic polymerization initiator and at least one halogenated polymerization inhibitor and compositions made therefrom.
Claims42
A stabilized, liquid, diepisulfide based prepolymer having a viscosity at 25° C. ranging from 20 to 33000 centipoises.
A process for making a stabilized, liquid, diepisulfide based prepolymer having a viscosity at 25° C. ranging from 20 to 33000 centipoises which comprises polymerizing at room temperature a monomer composition comprising at least one diepisulfide monomer in the presence of at least one anionic polymerizing initiator and at least one halogenated polymerization inhibitor.
A process for making a cured, transparent, diepisulfide based resin which comprises:
- obtaining a stabilized, liquid, diepisulfide based prepolymer having a viscosity at 25° C. ranging from 20 to 33000 centipoises;
- adding to the prepolymer an effective amount of an anionic polymerization initiator;
- and
- bulk polymerizing the prepolymer at least up to the obtention of a gel.
A process for making a cured, transparent, diepisulfide based resin which comprises:
- obtaining a stabilized, liquid, diepisulfide based prepolymer having a viscosity at 25° C. ranging from 20 to 33000 centipoises;
- adding to the prepolymer an effective amount of an anionic polymerization initiator;
- bulk polymerizing the prepolymer with heating at least up to the obtention of a gel.
Dependencies are inferred from the claim text.