Formation of blocked, isocyanurate group-containing...

C - Chemistry – Metallurgy – 08 – G

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C08G 18/80 (2006.01) C08G 18/02 (2006.01) C08G 18/18 (2006.01) C08G 18/79 (2006.01) C09D 175/06 (2006.01) C09D 175/12 (2006.01)

Patent

CA 2255156

The present invention relates to a process for the preparation of blocked polyisocyanates containing isocyanurate groups by a) reacting 20 to 80 equiv.% of the isocyanate groups of an organic diisocyanate with a pyrazole or triazole blocking agent, b) trimerizing the remaining unblocked isocyanate groups in the presence of a basic trimerization catalyst until the isocyanate content is less than 2.5% by weight, based on the weight of the blocked polyisocyanate and c) optionally blocking any remaining isocyanate groups with a blocking agent for isocyanate groups. The present invention also relates to the use of these blocked polyisocyanates for the production of polyisocyanate addition products.

La présente invention concerne un procédé de préparation de polyisocyanates séquencés contenant des groupes d'isocyanurate. Le procédé consiste à a) faire réagir 20 à 80 % d'équivalent en poids des groupes d'isocyanate d'un diisocyanate organique avec un agent bloquant de pyrazole ou triazole, b) trimériser les groupes d'isocyanate non séquencés restants en présence d'un catalyseur de trimérisation de base jusqu'à ce que la teneur en isocyanate soit inférieure à 2,5 % par poids, selon le poids du polyisocyanate séquencés et c) bloquer éventuellement tout groupe d'isocyanate restant au moyen d'un agent bloquant pour les groupes d'isocyanate. La présente invention porte également sur l'utilisation de ces polyisocyanates séquencés pour la production de produits d'addition de polyisocyanate.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Formation of blocked, isocyanurate group-containing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Formation of blocked, isocyanurate group-containing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of blocked, isocyanurate group-containing... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2012760

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.