Water soluble condensation polymers

Claim 1

THE PROCESS FOR THE PREPARATION OF A WATER-SOLUBLE COMPOSITION SUITABLE FOR COATING COMPRISING THE STEPS OF: (A) REACING A POLYOL OF THE FORMULA Z(CH2OH)N WHEREIN Z IS AN ALIPHATIC HYDROCARBON RADICAL HAVING NO MORE THAN 5 CARBON ATOMS AND N IS AN INTEGER HAVING A VALUE OF AT LEAST 3 AND NO MORE THAN 4, WITH AN ANHYDRIDE SELECTED FROM THE CLASS CONSISTING OF SUCCINIC, MALEIC, PHATHALIC AND TETRAHYDROPHTHALIC ACID ANHYDRIDES IN SUBSTANTIALLY MOLE PER MOLE PORTIONS OF SAID POLYOL AND SAID ANHYDRIDE THEREBY TO PRODUCE AN ADDUCT HAVING 1 ESTER GROUP AND 1 FREE ACID GROUP FROM SAID ANHYDRIDE; (B) THEREAFTER REACTING SAID ADDUCT WITH PROPORTIONS OF A POLYOL OF THE FORMULA Z(CH2OH)N AS DEFINED ABOVE, AND AN ANHYDRIDE AS DEFINED ABOVE AND A DRYING OIL FATTY ACID SELECTED FROM THE CLASS CONSISTING OF DEHYDRATED CASTOR OIL FATTY ACID, LINSEED OIL FATTY ACID, OITICIA OIL FATTY ACID, CHINAWOOD OIL FATTY ACID, SOYBEAN OIL FATTY ACID AND TALL OIL FATTY CAID, SAID POLYOL, SAID ACID ANHYDRIDE AND SAID DRYING OIL FATTY ACID OF REACTION (B) BEING USED IN PROPORTIONS OF 0.5-1.5 MOLES, 1.5-2.5 MOLES AND 0.5-1.5 MOLES RESPECTIVELY PER MOLE OF SAID ADDUCT AND DISTILLING WATER FROM THE REACTION MASS UNTIL THE REACTION PRODUCT HAS AN ACID NUMBER IN THE RANGE OF 50-65.