C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/42 (2006.01) C08G 63/189 (2006.01) C08G 63/88 (2006.01) C08G 63/85 (2006.01)
Patent
CA 2346806
Process for preparing a poly(alkylene polyaromatic dicarboxylate)ester based polyester polyol comprising the steps of a) depolymerising poly(alkylene polyaromatic dicarboxylate) in the presence of a glycol and b) transesterifying the obtained product by addition of polycarboxylic acids, anhydrides or esters and/or polyhydric alcohols and use of the thus obtained polyester polyol in the manufacture of rigid polyurethane and urethane- modified polyisocyanurate foams.
Ce procédé de préparation d'un polyester polyol à base de poly(alkylène polyaromatique dicarboxylate)ester consiste, (a) à dépolymériser le poly(alkylène polyaromatique dicarboxylate) en présence d'un glycol et, (b) à transestérifier le produit obtenu par adjonction d'acides polycarboxyliques, d'anhydrides ou d'esters et/ou d'alcools polyhydriques. On utilise le polyester polyol ainsi obtenu pour produire des mousses rigides de polyuréthanne et de polyisocyanurate modifié par de l'uréthanne.
Huntsman International Llc
Smart & Biggar
LandOfFree
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