C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 271/66 (2006.01) C07C 275/60 (2006.01) C08G 18/75 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01) C09D 175/00 (2006.01)
Patent
CA 2162832
The present invention relates to a process for preparing polyisocyanates containing allophanate groups by reacting compounds a), which i) contain urethane groups, but which are substantially free of hydroxyl groups and isocyanate groups, ii) have an average of at least two urethane groups per molecule, iii) are prepared by reacting organic isocyanates a1) with organic hydroxyl compounds a2) and iv) have an average molecular weight of at most 2,500, with excess quantities, based on the urethane groups, of distillable organic polyisocyanates b) to form polyisocyanates containing allophanate groups and subsequently removing by distillation the unreacted excess of component b) to a residual content of less than 0.5 wt.%, provided that polyisocyanates a1) and polyisocyanates b) are different. The present invention also relates to the products obtained from this process and to their use as binders or binder components in coating compositions.
Brahm Martin
Pedain Josef
Schmalstieg Lutz
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
LandOfFree
Polyisocyanates containing allophanate groups does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyisocyanates containing allophanate groups, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyisocyanates containing allophanate groups will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1751231