Lupraphen 8108 Difunctional aliphatic, polyester polyol BASF-Elastogran PU - Polyols >> Polyester Lupraphen 8108 is a difunctional, aliphatic polyester polyol. Lupraphen 8108 is used for the production of polyurethane flexible elastomers. Difunctional, aliphatic polyester polyol. Used for the production of polyurethane flexible elastomers.