Polymerizable composition of allyl functional monomers

C - Chemistry – Metallurgy – 08 – F

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C08F 18/24 (2006.01) C08F 218/18 (2006.01) C08F 290/06 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2405461

Describes a polymerizable composition of (a) a first allyl functional monomer, which is selected such that a substantially completely cured polymerizate of the first allyl functional monomer has a 15 second Barcol 934 hardness of at least 40, and (b) a second allyl functional monomer selected from polyether diol bis(allyl carbonate), polylactone diol bis(allyl carbonate) and mixtures thereof. The second allyl functional monomer is present in the composition in an amount to provide a substantially completely cured polymerizate having: (i) improved organic photochromic substance incorporation relative to a substantially completely cured polymerizate of the composition free of monomer (b); and (ii) heat distortion temperature of at least 40 °C.

L'invention concerne une composition polymérisable composée (a) d'un premier monomère d'allyle fonctionnel, sélectionné de façon qu'un polymérisat sensiblement entièrement durci du premier monomère d'allyle fonctionnel présente une dureté de Barcol 934 en 15 secondes d'au moins 40, et (b) d'un second monomère d'allyle fonctionnel sélectionné parmi le diol bis(allyle carbonate) de polyéther, le diol bis(allyle carbonate) de polylactone et des combinaisons de ceux-ci. Le second monomère d'allyle fonctionnel est présent dans la composition selon une quantité permettant d'obtenir un polymérisat sensiblement entièrement durci présentant: (i) une incorporation de substance organique photochromique améliorée par rapport à un polymérisat sensiblement entièrement durci de la composition sans monomère (b); et (ii) une température de déformation thermique d'au moins 40 DEG C.

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