Method of producing sulfur-containing transparent polymer

Details Method of producing sulfur-containing transparent polymer Method of producing sulfur-containing transparent polymer

C - Chemistry, Metallurgy

08

F

C08F 20/38 (2006.01) C08F 2/38 (2006.01)

Patent

CA 2116552

The present invention relates to a method of producing a sulfur-containing transparent polymer by polymerizing a composition containing a (metha)acrylate monomer having sulfur in its molecule, characterized by radical polymerization of a composition containing at least one compound selected from radical chain transfer compounds and radical trapping compounds in an amount of 0.1 to 7.0 % by weight of the total amount of the composition. The polymer obtained by polymerization is less colored. The method can provide a polymer having a high total light transmittance, a high refractive index and a light weight and is hardly yellowed during use.

Méthode pour l'obtention d'un polymère sulfuré transparent par polymérisation d'une composition renfermant un monomère de (méth)acrylate avec du soufre dans sa molécule; on procède par polymérisation radiculaire d'une composition renfermant au moins un composé choisi parmi des composés de transfert de chaîne radicalaire et de composés de piégeage radicalaire, à raison de 0,1 à 7,0 % en poids de la quantité totale de la composition. Le polymère obtenu par polymérisation est moins coloré. La méthode peut donner un polymère possédant une transmittance totale élevée, un haut indice de réfraction et une masse légère; il est en outre peu enclin au jaunissement avec le temps.

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