Oxypropylated esters of polycarboxylic acids

Claim 1

A HYDROPHILE SYNTHETIC PRODUCT WHICH IS THE ESTER OF (A) AN ACID SELECTED FROM THE GROUP CONSISTING OF ACYCLIC AND ISOCYCLIC POLYCARBOXY ACIDS HAVING NOT MORE THAN 8 CARBON ATOMS AND COMPOSED OF CARBON, HYDROGEN AND OXYGEN AND (B) A HIGH MOLAL OXYPROPYLATED COMPOUND OF THE GROUP CONSISTING OF OXYPROPYLATED POLYGLYCEROLS HAVING NOT MORE THAN 5 GLYCEROL RADICALS PER POLYGLYCEROL MOLECULE AND OXYPROPYLATED ETHERS OF SUCH POLYGLYCEROLS WITH MONOHYDROXYLATED COMPOUNDS COMPOSED OF CARBON, HYDROGEN AND OXYGEN, HAVING THE HYDROXY GROUP AS THE ONLY FUNCTIONAL GROUP AND HAVING NOT MORE THAN 8 CARBON ATOMS, WITH THE PROVISOS THAT THE HIGH MOLAL OXYPROPYLATED COMPOUND HAVE AT LEAST 4 HYDROXYL RADICALS, A MOLECULAR WEIGHT IN THE RANGE OF 2,000 TO 25,000 ON AN AVERAGE STATISTICAL BASIS, THAT THE RATIO OF PROPYLENE OXIDE PER HYDROXYL THEREIN BE IN THE RANGE OF 7 TO 80, THAT THE OXYPROPYLENE GROUPS THEREIN CONSTITUTE AT LEAST 87 1/2% BY WEIGHT ON A STATISTICAL BASIS, THAT THE PRECEDING PROVISOS ARE ABASED ON THE ASSUMPTION OF COMPLETE REACTION BETWEEN THE PROPYLENE OXIDE AND THE COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYGLYCEROLS AND ETHERS OF POLYGLYCEROLS, AND THAT THE RATIO OF (A) TO (B) BE ONE MOLE OF (A) FOR EACH HYDROXYL GROUP PRESENT IN (B).