A renewably sourced soil release polyester comprising two or more structural units (a1), one or more structural units (a2) and either one or two terminal structural groups (a3)




wherein



G1 is one or more (OCnH2n) with n being a number of from 2 to 10, preferably from 2 to 6 and more preferably (OC2H4), (OC3H6), (OC4H8) or (OC6H12),
R1 is a C1-30 alkyl, preferably C1-4 alkyl and more preferably methyl,
p is, based on a molar average, a number of from 1 to 200, preferably from 2 to 150 and more preferably from 3 to 120,
q is, based on a molar average, a number of from 0 to 40, preferably from 0 to 30, more preferably from 0 to 20, and most preferably from 0 to 10,

where the (OC3H6)— and (OC2H4)-groups of the terminal group (a3) may be arranged blockwise, alternating, periodically and/or statistically, preferably blockwise and/or statistically, either of the groups (OC3H6)— and (OC2H4)— can be linked to R1— and —O, adjacent structural units (a1) are connected by the structural unit (a2), in the case that only one terminal group (a3) is present in the polymer, the other terminal group is selected from the group consisting of OH, OCH3, and G1OH and both terminal groups may be only linked to a structural unit (a1).