Method of making urethane based fluorinated monomers

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 18/00 (2006.01) C08G 18/09 (2006.01) C08G 18/28 (2006.01) C08G 18/70 (2006.01)

Patent

CA 2649222

Method of preparing urethane based fluorinated monomers comprising (i) reacting a fluorinated alcohol and an isocyanate functional non-fluorinated monomer or (ii) reacting in one or two steps a fluorinated alcohol, a polyisocyanate and an isocyanate reactive non-fluorinated monomer, wherein reactions (i) and (ii) are carried out in the presence of one or more reactive diluents, the reactive diluents having an ethylenically unsaturated group and being free of isocyanate reactive groups. The method does not require an inert organic solvent as a reaction medium, thus excluding volatile organic compounds (VOC's). The resulting compositions can be readily and conveniently used to prepare radiation curable coating compositions without the need to remove organic solvent from the composition.

Procédé de préparation de monomères fluorés à base d'uréthane consistant à (i) faire réagir un alcool fluoré et un monomère non fluoré ayant une fonctionnalité isocyanate ou (ii) faire réagir en une ou deux étapes un alcool fluoré, un polyisocyanate et un monomère non fluoré réactif avec les isocyanates, lesdites réactions (i) et (ii) étant effectuées en présence d'un ou plusieurs diluants réactifs, les diluants réactifs ayant un groupe à insaturation éthylénique et ne contenant pas de groupes réactifs avec les isocyanates. Le procédé ne nécessite pas un solvant organique inerte en tant que milieu réactionnel, ce qui exclut ainsi les composés organiques volatils (les COV). Les compositions résultantes peuvent être aisément et commodément utilisées pour préparer des compositions de revêtement durcissables par un rayonnement sans avoir besoin d'enlever un solvant organique de la composition.

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