Process for the preparation of polyboric esters
Abstract
Abstract A PROCESS FOR MAKING POLYBORIC ESTERS OF THE GENERAL FORMULA (RO)3.(B3O3)M WHEREIN M IS GREATER OR EQUAL TO 1 BUT PREFERABLY LESS THAN 2 AND CORRESPONDS TO THE MOLAR RATIO OF BORON ATOMS TO RO UNITS, AND R IS ALKL RADICAL WITH I-6 CARBON ATOMS, A PHENYL RADICAL, OR A SUBSTITUTED-PHENYL RADICAL IN WHICH THE SUBSTITUENT IS CONSTITUTED OF ONE OR MORE ALKYL GROUPS WITH 1 TO 4 CARBON ATOMS. THE METHOD INVOLVES MIXING ORTHOBORIC ACID AND AN INERT ORGANIC LIQUID WITH A BOILING POINT HIGHER THAN 110*C. AND SUBJECTING THE MIXTURE TO A TEMPERATURE OF 80*C-220*C. TO PARTIALLY DEHYDRATE THE ORTHOBORIC ACID TO A BORIC ACID HAVING A B:OH RATIO OF 1 TO A MAXIMUM OF 2. THE POLYBORIC ACID IS ESTERIFIED AT 80* TO 220*C. BY MEANS OF AN ALIPHATIC ALCOHOL WITH 2-6 CARBON ATOMS, PHENOL OR A SUBSTITUTED PHENOL WHEREIN THE SUBSTITUENT IS LEAST ONE ALKYL COMPOUND WITH 1-4 CARBON ATOMS.
Inventors
- 👤 G Cuneo
Bibliographic Details
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