Cross-linked microparticles, method for the production and...

C - Chemistry – Metallurgy – 08 – F

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C08F 2/06 (2006.01) C08F 2/12 (2006.01) C08F 2/14 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2364551

Cross-linked particles having a size ranging from 10-300 nm, obtained by polymerization in a dispersion in a non-aqueous, non-solvent medium of the formed polymer of a composition consisting of unsaturated ethylenically polymerizable compounds, comprising: at least one monomer (A), comprising one single ethylenicunsaturation, whereby the microparticles formed in said non-aqueous medium are autostablilized during and after polymerization without any other addition of a polymer having a stabilizing agent function either before, during or after polymerization; at least one compound (B) comprising at least two ethylenic unsaturations and, optionally according to the cases in question, at least one compound (C) comprising one single ethylenic unsaturation and/or at least one compound (D) which is different from A, B and C and comprising at least one ethylenic unsaturation that can be radically polymerized and at least one second reactive function (f1) that is different from an ethylenic unsaturation.

Ces microparticules réticulées de taille entre 10 - 300 nm sont obtenues par polymérisation en dispersion en milieu non aqueux non solvant du polymère formé, d'une composition de composés polymérisables éthyléniquement insaturés, comprenant: au moins un monomère A, comportant une seule insaturation éthylénique, conférant aux microparticules formées dans ledit milieu non aqueux, une autostabilisation pendant et après polymérisation, sans aucune addition de polymère ayant une fonction d'agent stabilisant, ni avant ni pendant ni après polymérisation; au moins un composé B comportant au moins 2 insaturations éthyléniques et en option suivant les cas: au moins un composé C comportant une seule insaturation éthylénique et/ou au moins un composé D différent de A, de B et de C et comportant au moins une insaturation éthylénique polymérisable par voie radicalaire et au moins une deuxième fonction réactive fl différente d'une insaturation éthylénique.

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