Radiation curable thiol-ene composition

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 75/04 (2006.01) C08G 18/67 (2006.01) C08G 18/83 (2006.01)

Patent

CA 2525059

The invention relates to a curable thiol-ene composition comprising either compound A and compound B, or a compound B further comprising polythiol functionality as defined under (A), wherein (A) a polythiol, (B) a compound having a plurality of cyclic ene groups thereon, wherein said compound (B) comprises a carbonyl group directly attached to at least one cyclic ene group and comprises at least one hydrogen donating group, wherein the distance between at least one of said cyclic ene groups and at least one of said hydrogen donating groups is at least two skeletal bonds, wherein compound (B) does not contain a (meth)acrylate group, and 0-10 wt.% of a (free-radical) photoinitiator. The invention further relates to the use of such composition fiber optical coating, stereolithography resin, medical coating and adhesive.

L'invention concerne une composition thiol-ène durcissable qui contient soit un composé A et un composé B, soit un composé B présentant une fonctionnalité polythiol tel que définie dans (A) ; (A) étant un polythiol ; (B) un composé présentant une pluralité de groupes <= ène >= cycliques, ledit composé (B) comprenant un groupe carbonyle directement lié à au moins un groupe <= ène >= cycliqueet comprenant au moins un groupe hydrogène donneur, la distance entre au moins l'un desdits groupes <= ène >= cycliques et au moinsl'un des groupes hydrogène donneurs est au moins égale à deux liaisons de squelette, le composé (B) ne contenant pas de groupe (méth)acrylate ; et (C) entre 0 et 10 % en poids d'un photo-initiateur (radical libre). Par ailleurs, l'invention concerne l'utilisation de cette composition comme revêtement de fibre optique, résine de stéréolithographie, revêtement médical et adhésif.

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