Polymer of an unsaturated ketone compound crosslinked with a hydrazide of a polybasic carboxylic acid

Claim 1

A PROCESS FOR THE PRODUCTION OF CROSS-LINKED POLYMERS WHICH COMPRISES REACTING AT A TEMPERATURE WITHIN THE RANGE OF 20*C. TO 140*C. A HYDRAZIDE OF A POLYBASIC CARBOXYLIC ACID CONTAINING AT LEAST TWO HYDRAZIDE GROUPS WHEREIN THE CARBOXYLIC ACID IS AN ACID SELECTED FROM THE GROUP CONSISTING OF PHTHALIC ACID, ISOPHTHALIC ACID, TERPHTHALIC ACID, AN ALIPHATIC SATURATED DICARBOXYLIC ACID HAVING FROM 2 TO 10 CARBON ATOMS OR A POLYACRYLIC ACID; WITH A POLYMER OBTAINED BY POLYMERIZATION OF AN OLEFINICALLY UNSATURATED KETO COMPOUND IN AQUEOUS EMULSION WHEREIN THE POLYMER IS SELECTED FROM THE GROUP CONSISTING OF A HOMOPOLYMER AND A COPOLYMER WHEREIN THE POLYMER IS DERIVED FROM A VINYL ESTER OF AN ALIPHATIC MONBASIC ACID CONTAINING A KETO GROUP, SAID ACID HAVING 4 TO 8 CARBON ATOMS; A VINYL ESTER OF AN ALIPHATIC DIBASIC ACID CONTAINING A KETO GROUP, SAID ACID HAVING 4 TO 8 CARBON ATOMS; AN ALLYL ESTER OF ALIPHATIC MONOBASIC ACIDS CONTAINING A KETO GROUP, SAID ACID HAVING 4 TO 8 CARBON ATOMS; AND ALLYL ESTER OF AN ALIPHATIC DIBASIC ACID CONTAINING A KETO GROUP, SAID ACID HAVING 4 TO 8 CARBON ATOMS; A VINYL SUBSTITUTED AMIDE OF AN ALIPHATIC ACID HAVING A KETO GROUP, SAID ALIPHATIC ACID HAVING 4 TO 8 CARBON ATOMS; AN ALLYL SUBSTITUTED AMIDE OF AN ALIPHATIC ACID HAVING A KETO GROUP, SAID ALIPHATIC ACID HAVING 4 TO 8 CARBON ATOMS, VINYLMETHYL KETONE, VINYLETHYLKETONE AND WHEREIN THE COPOLYMER HAVING THE KETO GROUP CONTAINING MONOMER HAS A COMONOMER A MONOMER SELECTED FROM AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF A VINYL ESTER OF AN ACID HAVING FROM 1 TO 20 CARBON ATOMS, AN ESTER OF ACRYLIC ACID, METHACRYLIC ACID, MALEIC ACID AND FUMARIC ACID WHENIN THE ESTER IS DERIVED FROM A MONOHYDRIC SATURATED ALIPHATIC ALCOHOL HAVING FROM 1 TO 10 CARBON ATOMS, STYRENE, VINYL CHLORIDE, ETHYLENE, PROPYLENE AND ISOBUTYLENE, THE SAID HYDRAZIDE BEING PRESENT IN AN AMOUNT OF 20% TO 150%, CALCULATED ON THE STOICHIOMETRIC AMOUNT NECESSARY FOR THE REACTION OF ALL KETO GROUPS.