Abstract:
The present invention relates in general to thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerisation give optically transparent articles, such as ophthalmic lenses, having improved mechanical and optical properties and in particular having an improved UV cut.
Abstract:
The room temperature polymerizable composition comprises at least one polymerizable monomer having at least one episulfide functionality and an effective amount of at least one (alkoxyphenyl)phosphine polymerization catalyst.
Abstract:
A process for polymerizing / curing a photopolymerizable monomer composition comprising at least one diepisulfide monomer which comprises the steps of :a) mixing to the monomer composition an effective amount of a cationic photopolymerization initiator, andb) irradiating the mixture of a) with an ultraviolet radiation to at least partially cationically photopolymerize the monomer composition.
Abstract:
Disclosed is a thiophosphine compound of formula: wherein X represents with R 1 being H or -CH 3 , R and R' represent, independently from each other, an alkyl radical, an alkoxy radical, an aryl radical or a phenyl radical which may be substituted with one or more alkyl and/or alkoxy groups, n is an integer from 0 to 4, n' is an integer from 0 to 5, x is an integer from 0 to 2, y is an integer from 1 to 5 with the proviso that y+n is an integer from 1 to 5. The compounds can be used to make optically transparent articles such as ophthalmic lenses.
Abstract:
The room temperature polymerizable composition comprises at least one polymerizable monomer having at least one episulfide functionality and an effective amount of at least one (alkoxyphenyl)phosphine polymerization catalyst.
Abstract:
Composición adhesiva fotocurable que comprende sobre la base del peso total de los monómeros y/u oligómeros fotocurables de la composición: 5 a 60% en peso de por lo menos un monómero de mono o poliacrilato u oligómero del mismo (A); 5 a 50% en peso de por lo menos un monómero de tio(met)acrilato u oligómero del mismo (B) que presenta por lo menos un grupo funcional de tio(met)acrilato (Ver fórmula) en el que R 1 es H o CH3; y 20 a 50% de por lo menos un monómero de dimetacrilato aromático o un oligómero del mismo (C); con la condición de que la composición no contenga un acrilato bromado monofuncional.
Abstract:
The room temperature polymerizable composition comprises at least one polymerizable monomer having at least one episulfide functionality and an effective amount of at least one (alkoxyphenyl)phosphine polymerization catalyst.