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Enzymatic synthesis of alkyds
Author(s) -
Geresh Shimona,
Giiboa Yigal
Publication year - 1990
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260360309
Subject(s) - chemistry , isomerization , polyester , organic chemistry , catalysis , transesterification , alkyd , fumaric acid , acetonitrile , condensation polymer , enzyme catalysis , alkoxy group , diol , butane , polymer chemistry , alkyl , coating
Lipases were used as catalysts in the synthesis of “all‐trans” polyester oligomers in organic solvents. Esters of fumaric acid and 1,4‐butane diol served as the substrates in the enzyme‐catalyzed polytransesterification. No isomerization of the double bond was found under the mild conditions of enzymatic catalysis used by us, as opposed to the extensive isomerization found during chemical polycondensation. The alkoxy leaving group of the ester fumarate was found to be responsible for the rate of transesterification. Low ( M w ≃ 600–800) and high ( M w = 1250) molecular weight alkyds were synthesized depending on whether tetrahedrofuran or acetonitrile, respectively, was used as the solvent.