C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/73 (2006.01) C08G 10/00 (2006.01) C08G 18/28 (2006.01) C08G 18/72 (2006.01) C08G 18/78 (2006.01)
Patent
CA 2223466
Urethane-filled polyisocyanates are produced by (a) reacting a hexamethylene diisocyanate-containing residue having less than 10% by weight monomeric hexamethylene diisocyanate and a total NCO content of at least 25% with an alcohol containing at least one ether linkage in an equivalent ratio of isocyanate to hydroxyl groups of from about 0.9:1 to about 1.0:0.9 and (b) dissolving the product of (a) in a polyisocyanate. These urethane-filled polyisocyanates are particularly useful in the production of polyurethanes.
On produit des polyisocyanates contenant un uréthane (a) en faisant réagir un résidu contenant de l'hexaméthylène-diisocyanate renfermant moins de 10 % en poids d'hexaméthylène-diisocyanate monomérique et présentant une teneur totale en NCO d'au moins 25 % avec un alcool contenant au moins une liaison éther dans un rapport équivalent groupes isocyanate/groupes hydroxyle compris entre environ 0,9/1 et environ 1,0/0,9 et (b) en dissolvant le produit de (a) dans un polyisocyanate. Ces polyisocyanates sont particulièrement utiles dans la production de polyuréthanes.
Corporation Bayer
Swabey Ogilvy Renault
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