Lupraphen 8104 Difunctional, aliphatic, polyester polyol BASF-Elastogran Polyurethane (PU) - Polyols >> Polyester Lupraphen 8104 is a difunctional, aliphatic, polyester polyol. Lupraphen 8104 is used for the production of compact and cellular polyurethane elastomers. Difunctional, aliphatic, polyester polyol. Used for the production of compact and cellular polyurethane elastomers.