Resinous mixed alkyl ester and carboxy ester lactones and preparation process therefor

Claim 1

A PROCESS FOR PREPARING A RESINOUS MIXED ESTER-LACTONE CONTAINING -COOCNH2NCOOH GROUPS, -COOCNH2NCOOR GROUPS, -COOH GROUPS AND -COOR GROUPS ATTCHED DIRECTLY TO THE CARBON CHAIN OF SAID LACTONE WHEREIN N AND R OF SAID GROUPS ARE AS DEFINED BELOW AND WHEREIN THE TOTAL FREE CARBOXYL GROUPS PRESENT ARE EQIVALENT TO FORM 4.0-6.0 MLS. OF N NAOH/GRAM OF THE SAID LACTONE, WHICH COMPRISES HEATING TO AT LEAST 60*C. IN THE PRESENCE OF A MINERAL ACID, A MIXTURE COMPRISING (1) FROM 15-30% BY WEIGHT OF AN INTERPOLYMER OF A VINYL ORGANIC ACID ESTER AND AN UNSATURATED A,B-DICARBOXYLIC ACID COMPOUND FROM THE GROUP CONSISTING OF MALEIC ACID, CITRACONIC ACID, DIMETHYLMALEIC ACID AND ANHYDRIDES AND ALKYL ESTERS OF 1-4 CARBON ATOMS THEREOF, FUMERIC ACID, MESACONIC ACID, DIMETHYLFUMARIC ACID AND ALKYL ESTERS OF 1-4 CARBON ATOMS THEREOF, (2) FROM 35-65% BY WEIGHT OF A MONOHYDRIC HYDROXY ACID OF THE FORMULA CNH2N(OH)(COOH)X WHEREIN N IS AN INTEGER OF FROM 1-5 AND X IS AN INTEGEROF FROM 1-2 AND (3) FROM 10-45% BY WEIGHT OF AN ALKANOL OF THE FORMULA R-OH WHEREIN R REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYL GROUP CONTAINING FROM 1-12 CARBON ATOMS, A PHENYLALKYL GROUP WHEREIN THE SAID ALKYL GROUP CONTAINS FROM 1-4 CARBON ATOMS AND A TOLYLALKYL GROUP WHEREIN THE SAID ALKYL GROUP CONTAINS FROM 1-4 CARBON ATOMS, AND THEREBY FORMING SAID MIXED ESTER-LACTONE.