Process for producing metal-containing ethylenic copolymer

Abstract

Abstract A PROCESS FOR PRODUCING A METAL-CONTAINING ETHYLENIC COPOLYMER HAVING A DEGREE OF SAPONIFICATION OF 30 TO 100 MOLE PERCENT AND A DEGREE OF NEUTRALIZATON OF 60 TO 100 MOLE PERCENT WHICH COMPRISES SAPONIFYING A PRIMARY COPOLYMER OF ETHYLENE AND AT LEAST ONE ESTER OF A,B-ETHYLENICALLY UNSATURATD CARBOXYLIC ACID HAVING 4 TO 10 CARBON ATOMS, THE UNSATURATED CARBOXYLIC ESTER CONTENT OF SAID PRIMARY COPOLYME BEING 1 TO 20 MOLE PERCENT, WITH A BASIC METAL COMPOUND IN A SOLVENT. A METAL-CONTAINING COPOLYMER HAVING ANY DESIRED DEGREE OF NEUTRALIZATION CAN BE OBTAINED FROM THE AFORESAID METL-CONTAINING ETHYLENIC COPOLYMER BY CONTACTING WITH AN INORGANIC AND/OR ORGANIC ACID TO CONVERT A PART OF THE METAL CARBOXYLATE GROUPS IN THE COPOLYMER INTO CARBOXYL GROUPS. ALTERNATIVELY, SUCH A METAL-CONTAINING ETHYLENIC COPOLYMER HAVIG ANY DESIRED DEGREE OF NEUTRALIZATION CAN ALSO BE PRODUCED BY MELT-MIXING THOSE COPOLYMERS WHICH HAVE DIFFERENT DEGREES OF NEUTRALIZATION. FURTHER, ANY DESIRED METAL CAN BE INTRODUCED INTO THE ALKALI METAL-CONTAINING COPOLYMER BY DISPERSING THE COPOLYMER IN WATER AND/OR ALDOHOL AND ADDING THERETO A COMPOUND HAVING THE DESIRED NON-ALKALI METAL TO EFFECT ION-EXCHANGE.

Inventors

• 👤 I Iwami
• 👤 H Kawasaki
• 👤 H Kinoshita

Bibliographic Details