Novel emulsifiable waxy linear polyesters

Claim 1

A SELF-LUSTERING PROTECTIVE COATING COMPOSITION COMPRISING WATER AND A FILM FORMING AGENT, THE FILM FORMING AGENT INCLUDING EMULSIFIABLE WAXY LINEAR POLYESTERS OF (1) A NON-BRANCHED POLYMETHYLENE GLYCOL HAVING FROM 4 TO ABOUT 15 CARBON ATOMS, (2) A NON-BRANCHED POLYMETHYLENE DICARBOXYLIC ACID HAVING FROM 4 TO ABOUT 15 CARBON ATOMS AND (3) A STRAIGHT CHAIN ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 26 TO ABOUT 45 CARBON ATOMS, SAID POLYSTERS CONTAINING ONLY CARBON, HYDROGEN AND OXYGEN, AND HAVING A MELTING POINT OF AT LEAST ABOUT 80* C. AND AN ACID VALUE OF FROM ABOUT 10 TO ABOUT 30, THE PROPORTIONS OF (1), (2) AND (3) BEING SUBSTANTIALLY N MOLS OF SAID GLYCOL, N PLUS 1 MOLS OF SAID DICARBOXYLIC ACID AND 1 MOL OF SAID ALCOHOL, N HAVING A VALUE OF FROM 2 TO 30 SAID POLYESTER MOLECULES BEING TERMINATED PREDOMINANTLY WITH CARBOXYL AND ALKYL GROUPS IN SUBSTANTIALLY EQUAL PROPORTIONS.