Polyester polyol for use in polyurethane
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United States of America Patent
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Mar 20, 2018
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Apr 15, 2013
filing date -
Apr 16, 2012
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Abstract
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.
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