| 摘要 |
Polyester polyol (I) comprising the esterification product of: (a) a dicarboxylic acid composition; (b) one or more fatty acids and/or their derivatives; (c) one or more 2-18C-(cyclo)aliphatic diols or their alkoxylates; a polyether alcohol produced by the alkoxylation of a polyol (g) in the presence of an amine catalyst; (e) a polyether alcohol produced by the alkoxylation of a polyol (h) in the presence of a catalyst different from amine; and (f) a polyol comprising glycerol, trimethylolpropane or pentaerythritol, is new. Polyester polyol (I) comprising the esterification product of: (a) 10-70 mol.% of a dicarboxylic acid composition containing (a1) 50-100 mol.% of an aromatic dicarboxylic acid or a mixture of aromatic dicarboxylic acids and (a2) 0-50 mol.% of one or more aliphatic dicarboxylic acids; (b) 2-30 mol.% of one or more fatty acids and/or their derivatives; (c) 10-70 mol.% of one or more 2-18C-(cyclo)aliphatic diols or their alkoxylates; (d) 2-50 mole.% of a polyether alcohol having a functionality of >= 2 produced by the alkoxylation of a polyol (g) having a functionality of >= 2, in the presence of an amine catalyst; (e) 0-45 mole.% of a polyether alcohol having a functionality of >= 2 produced by the alkoxylation of a polyol (h) having a functionality of >= 2, in the presence of a catalyst different from amine; and (f) 0-50 mole.% of a polyol having a functionality of >= 2 comprising glycerol, trimethylolpropane or pentaerythritol, is new, where at least 200 mmole of the component (d) is reacted one per kg of (I). An independent claim is included for the preparation of rigid polyurethane foams by reacting at least one organic and/or modified organic di- and/or polyisocyanate with (I), optionally at least one other polyester polyol, optionally at least one polyetherol, and/or at least one further compound having at least two isocyanate-reactive groups, optionally, at least one chain extender and/or crosslinker, at least one propellant, at least one catalyst, optionally at least one further auxiliary agent and/or additive, and optionally at least one flame retardant. |
