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AssigneePurac Biochem B.V.
InventorsWilhelmus Jacobus Adrianus Honcoop, Chris François Hubert Schaekens, Jurgen Cornelis Henricus Maas, Mauraline Alison Maxine Gumbs
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The present invention relates to a polyester polyol, suitable for use in the manufacture of a polyurethane, suitable for use in the manufacture of a polyurethane, the polyester polyol having an ABA-structure, in which A represents a lactide-oligomer and in which B represents an initiator. The initiator includes a reaction product having long chain dicarboxylic acid components having 18 or more carbon atoms. The invention also relates to a method for the manufacture of the polyester polyol. The invention further pertains to polyurethanes including the before-mentioned polyester polyol as well as the use of these polyurethanes as an elastomer having a high toughness. The toughness is believed to originate from the combination of the hydrophobic character of the initiator and the hydrophilic character of the lactide parts in the polyol structure. The strength of the invented polylactide-polyurethane elastomers can be further improved by incorporating a carbodiimide in the elastomer material.
Polyester polyol, suitable for use in the manufacture of a polyurethane, said polyester polyol having an ABA-structure, in which A represents a lactide-oligomer and in which B represents an initiator, wherein the initiator comprises a reaction product comprising a long chain dicarboxylic acid component having 18 or more carbon atoms.
Method for the manufacture of a polyester polyol, wherein amounts of a long chain dicarboxylic acid having 18 or more carbon atoms and a diol and are combined in a reaction mixture, after which the temperature of the mixture is raised to above 200° C. to initiate the reaction, and that lactide and a catalyst are added to the reaction mixture after the reaction between the acid and the diol is completed.
Dependencies are inferred from the claim text.