C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/134, 403/14,
C08G 65/26 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01)
Patent
CA 1334234
This invention relates to o-tolylenediamine- based polyether polyols having an OH number of about 400 to 630, in which about 5 to 20% of the isocyanate- reactive groups of the polyether polyols are secondary amino groups and which contain less than about 0.2% by weight free o-tolylenediamine. The polyether polyols of the invention are formed by sequential reaction of o-tolylenediamine first with about 2 to 5 mol of ethylene oxide and then with about 1 to 5 mol of propylene oxide per mol of o-tolylenediamine. This invention also relates to the process for the production of polyether polyols using said sequential reaction at a temperature of about 90 to 125°C and in the presence of an amine catalyst. This invention further relates to a method for the production of polyisocyanate-based plastics, preferably polyurethane foams, comprising reacting organic polyisocyanates with polyether polyols of the invention and compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight range of about 200 to 1,500, and optionally also with chain-extending agents or crosslinking agents and auxiliaries or additives.
584007
Dietrich Manfred
Kaufung Reinhard
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
LandOfFree
Polyether polyols based on o-tolylenediamine, a process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyether polyols based on o-tolylenediamine, a process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyether polyols based on o-tolylenediamine, a process for... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1230673