Polyester polyols from tall oil fatty acid maleic anhydride,...

C - Chemistry – Metallurgy – 08 – L

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C08L 67/08 (2006.01) B32B 5/18 (2006.01) B32B 27/28 (2006.01) C08G 18/42 (2006.01) C08G 18/68 (2006.01) C08G 63/553 (2006.01)

Patent

CA 2050096

ABSTRACT Polyester polyols are prepared by reacting a multifunctional adduct (e.g., maleic anhydride (MA)) and tall oil fatty acid, (TOFA), and then esterifying/transesterifying the MA/TOFA reaction product with an excess of aromatic polyester polyols (preferably such polyols are produced from dimethyl terephthalate (DMT) process residue and polyhydric alcohols). The polyester polyols may be used in the manufacture of rigid polyurethane (PUR) and rigid urethane-modified polyisocyanurate (PUR/PIR) foams.

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