C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/102, 403/17,
C08G 18/00 (2006.01) C08G 18/63 (2006.01) C08K 5/56 (2006.01)
Patent
CA 1082381
ABSTRACT OF THE DISCLOSURE Improvements in polymer/polyol compositions which are convertible by reaction with polyisocyanates to poly- urethanes which are pigmented to a medium to dark color and which inherently chalk upon exposure to weather and wherein the polymer of the polymer/polyol composition is dispersed in the polyol thereof and is formed from one or more poly- merizable ethylenically unsaturated monomers. The improve- ment provides to said polyurethanes resistance to chalking on exposure to weather and in one embodiment comprises the presence, in the polymer/polylol compositions used to make the polyurethanes, of a metallocene from the class consisting of ferrocene, ferrocene derivatives, cobaltocene and nickel- ocene in an amount effective to provide chalk resistance. Optionally, the metallocene can be present in the polyiso- cyanate composition instead of the polymer/polyol composition. Improved dark colored polyurethanes are made by reacting a mixture comprising (a) a polymer/polyol composition and (b) an organic polyisocyanate in the presence of (c) a catalyst for the reaction of (a) and (b), (d) a metallocene, preferably ferrocene, or a ferrocene polymer and (a) a medium to dark pigment to produce the polyurethane.
282630
Hopley William G.
Union Carbide Corporation
LandOfFree
Chalk-resistant, medium to dark colored polyurethanes,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chalk-resistant, medium to dark colored polyurethanes,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chalk-resistant, medium to dark colored polyurethanes,... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-841663