C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/38 (2006.01) G02B 1/04 (2006.01) G02B 5/23 (2006.01)
Patent
CA 2391858
The present invention is directed to a novel method of preparing a polymerizate, which includes the step of polymerizing a two-component composition, which includes: a first component containing at least one polycyanate reactant having at least two functional groups selected from isocyanate, isothiocyanate and combinations thereof, the polycyanate reactant being the reaction product of: a polythiol monomer having at least two thiol groups, and a polycyanate monomer having at least two functional groups selected from isocyanate, isothiocyanate and combinations thereof; and a second component containing at least one polyamine reactant having at least two functional groups selected from primary amine, secondary amine and combinations thereof. The present invention is also directed to polymerizates prepared according to the method of the present invention. The present invention is further directed to photochromic articles that may be prepared from the polymerizates of the present invention.
L'invention porte sur un nouveau procédé de préparation d'un polymérisat par polymérisation d'une composition à deux composants soit: un premier composant contenant au moins un réactif de polycyanate présentant au moins deux groupes fonctionnels choisis parmi isocyanate, isothiocynate et leur combinaison, le réactif de polycyanate étant le produit de réaction d'un monomère de polythiol présentant au moins deux groupes fonctionnels thiol et d'un monomère de polycyanate présentant au moins deux groupes fonctionnels choisis parmi isocyanate, isothiocyanate et leur combinaison; et un deuxième composant contenant au moins une polyamine choisie parmi une amine primaire, une amine secondaire et leur combinaison. L'invention porte également sur les polymérisats préparés selon ledit procédé, et sur des articles photochromiques pouvant en être faits.
Graham Marvin J.
Herold Robert D.
Okoroafor Michael O.
Smith Robert A.
Tabakovic Rifat
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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